/* roulang page: index */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --ink-900:#14101F;
  --ink-700:#2A2340;
  --ink-500:#5A5470;
  --ink-300:#9A94AD;
  --line:#E6E1DA;
  --brand-600:#0E9F7E;
  --brand-500:#14C79B;
  --brand-100:#E4F7F1;
  --accent-500:#FF7A2F;
  --accent-100:#FFEDE0;
  --violet-500:#6C4DE6;
  --danger:#D94A3D;
  --shadow-sm:0 1px 2px rgba(20,16,31,.06);
  --shadow-md:0 6px 20px -8px rgba(20,16,31,.18);
  --shadow-lg:0 18px 48px -20px rgba(20,16,31,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
  letter-spacing:0;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-0.01em;font-weight:700;color:var(--ink-900)}
p{margin:0 0 1.15em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-sm{padding:56px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand-600);background:var(--brand-100);
  border-radius:999px;padding:6px 14px;
}
.h1{font-size:42px;line-height:1.3}
.h2{font-size:30px;line-height:1.3}
.h3{font-size:22px}
.lead{font-size:17px;line-height:1.9;color:var(--ink-500)}
.muted{color:var(--ink-500)}
.num{font-variant-numeric:tabular-nums}

/* header */
.site-header{position:sticky;top:0;z-index:60;padding:14px 0 6px;transition:padding .2s ease}
.site-header.is-scrolled{padding:8px 0 4px}
.nav-shell{
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow-md);
  padding:10px 14px;
  display:flex;align-items:center;gap:14px;
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled .nav-shell{box-shadow:var(--shadow-lg)}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:36px;height:36px;border-radius:10px;
  background:var(--ink-900);
  display:grid;place-items:center;flex:0 0 auto;
}
.logo-text{font-size:17px;font-weight:600;white-space:nowrap;color:var(--ink-900)}
.nav-slot{display:flex;align-items:center;gap:8px;flex:1 1 auto;min-width:0}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;border-radius:12px;
  border:1px solid var(--line);background:var(--paper-2);
  font-size:14px;font-weight:500;color:var(--ink-700);
  white-space:nowrap;transition:all .18s ease;
}
.nav-card:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-1px)}
.nav-card.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.nav-card.active svg{stroke:#fff}
.nav-card svg{stroke:var(--brand-600);flex:0 0 auto}
.nav-card.active svg{stroke:#fff}
.nav-cta{
  flex:0 0 auto;
  background:var(--accent-500);color:var(--ink-900);
  font-size:14px;font-weight:600;
  padding:11px 20px;border-radius:12px;
  box-shadow:var(--shadow-sm);
  transition:all .18s ease;white-space:nowrap;
}
.nav-cta:hover{background:#F06A1E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.nav-cta:active{transform:translateY(0)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;align-items:center;justify-content:center}
.drawer{
  position:fixed;inset:0;background:var(--paper);
  z-index:90;padding:20px 16px 32px;overflow-y:auto;
  transform:translateY(-102%);transition:transform .24s ease;
}
.drawer.open{transform:translateY(0)}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:12px;
  font-size:16px;font-weight:600;transition:all .18s ease;white-space:nowrap;
}
.btn-md{height:44px;padding:0 22px;font-size:15px}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:#0C8C6E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0)}
.btn-accent{background:var(--accent-500);color:var(--ink-900);box-shadow:var(--shadow-sm)}
.btn-accent:hover{background:#F06A1E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-ghost{border:1px solid rgba(255,255,255,.28);color:#fff;background:rgba(255,255,255,.04)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-outline{background:#fff;border:1px solid var(--line);color:var(--ink-900)}
.btn-outline:hover{border-color:var(--brand-500);color:var(--brand-600)}

/* badges */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;border-radius:999px;padding:4px 12px;line-height:1.6}
.badge-brand{background:var(--brand-100);color:var(--brand-600)}
.badge-violet{background:#EFEBFF;color:var(--violet-500)}
.badge-accent{background:var(--accent-100);color:#B8541A}

/* hero */
.hero{
  position:relative;background:var(--ink-900);color:#fff;
  border-radius:24px;overflow:hidden;
  padding:64px 0 68px;margin-top:12px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);
  background-size:22px 22px;opacity:.55;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.hero h1{color:#fff;font-size:42px;line-height:1.3}
.hero p.hero-sub{color:rgba(255,255,255,.76);font-size:18px;line-height:1.85;margin:18px 0 28px;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.hero-stats{display:flex;flex-wrap:wrap;gap:28px;border-top:1px solid rgba(255,255,255,.12);padding-top:22px}
.hero-stat .v{font-size:24px;font-weight:700;color:var(--brand-500)}
.hero-stat .k{font-size:13px;color:rgba(255,255,255,.6)}
.hero-visual{position:relative;border-radius:20px;overflow:hidden;border:1px solid rgba(255,255,255,.12)}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(20,16,31,.82) 0%,rgba(20,16,31,.12) 55%,rgba(20,16,31,0) 100%);
}
.hero-visual .tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  background:rgba(255,255,255,.94);color:var(--ink-900);
  border-radius:999px;padding:6px 14px;font-size:13px;font-weight:600;
  display:inline-flex;align-items:center;gap:8px;
}
.dot-live{width:8px;height:8px;border-radius:50%;background:var(--brand-500);display:inline-block}
.hero-badge{
  position:absolute;right:16px;top:16px;z-index:2;
  background:var(--accent-500);color:var(--ink-900);font-size:13px;font-weight:600;
  border-radius:10px;padding:6px 12px;
}

/* quick strip */
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.strip-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:16px;
  padding:18px;box-shadow:var(--shadow-sm);display:flex;gap:12px;align-items:flex-start;
  transition:all .18s ease;
}
.strip-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.strip-card .ico{width:40px;height:40px;border-radius:12px;background:var(--brand-100);display:grid;place-items:center;flex:0 0 auto}
.strip-card .t{font-size:15px;font-weight:600;margin-bottom:2px}
.strip-card .d{font-size:13px;color:var(--ink-500);line-height:1.7}

/* timeline */
.timeline{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:24px;margin-top:44px}
.timeline::before{
  content:"";position:absolute;top:20px;left:6%;right:6%;height:0;
  border-top:2px dashed var(--line);z-index:0;
}
.step{position:relative;z-index:1;background:var(--paper-2);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow-sm);transition:all .18s ease}
.step:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.step-node{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:#fff;margin:-40px auto 14px;border:4px solid var(--paper);
}
.node-a{background:var(--brand-600)}
.node-b{background:var(--violet-500)}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-500);line-height:1.8;margin:0}
.step-time{display:inline-block;margin-top:10px;font-size:12px;color:var(--ink-300)}

/* bento */
.bento{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:minmax(180px,auto);gap:24px}
.bento-item{background:var(--paper-2);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow-sm);transition:all .18s ease;display:flex;flex-direction:column}
.bento-item:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.bento-item h3{font-size:20px;margin:14px 0 8px}
.bento-item p{font-size:15px;color:var(--ink-500);line-height:1.85;margin:0 0 14px}
.bento-media{padding:0;overflow:hidden;grid-row:span 2;position:relative}
.bento-media img{width:100%;height:100%;min-height:280px;object-fit:cover}
.bento-media .cap{
  position:absolute;left:0;right:0;bottom:0;padding:20px;
  background:linear-gradient(to top,rgba(20,16,31,.88),rgba(20,16,31,0));
  color:#fff;font-size:15px;font-weight:600;
}
.bento-wide{grid-column:span 2}
.link-arrow{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;margin-top:auto}
.link-arrow:hover{gap:10px}

/* compare */
.compare{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.plan{background:var(--paper-2);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:all .18s ease}
.plan:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.plan.recommended{border-color:var(--brand-600);box-shadow:var(--shadow-md)}
.plan .plan-tag{align-self:flex-start;margin-bottom:12px}
.plan h3{font-size:20px;margin-bottom:6px}
.plan .plan-note{font-size:14px;color:var(--ink-500);margin-bottom:18px}
.plan ul{display:grid;gap:10px;margin-bottom:22px}
.plan li{display:flex;gap:10px;font-size:15px;color:var(--ink-700);line-height:1.75}
.plan li svg{flex:0 0 auto;margin-top:5px}
.plan li.off{color:var(--ink-300)}

/* cta band */
.cta-band{background:var(--ink-900);border-radius:24px;padding:48px;display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.08) 1px,transparent 1px);background-size:20px 20px;opacity:.6}
.cta-band > *{position:relative}
.cta-band h2{color:#fff;font-size:30px;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.72);margin:0;font-size:16px}
.cta-form{background:var(--paper);border-radius:20px;padding:26px;box-shadow:var(--shadow-lg)}
.field{margin-bottom:14px}
.field label{display:block;font-size:14px;font-weight:500;margin-bottom:6px}
.field input{
  width:100%;height:48px;border-radius:12px;border:1px solid var(--line);
  background:#fff;padding:0 14px;font-size:15px;transition:all .16s ease;
}
.field input:focus{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(14,159,126,.18);outline:none}
.form-hint{font-size:12.5px;color:var(--ink-300);line-height:1.7;margin:10px 0 0}

/* news */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:var(--paper-2);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:all .18s ease}
.news-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.news-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--brand-100)}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.news-card:hover .thumb img{transform:scale(1.04)}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:18px;margin:12px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:14.5px;color:var(--ink-500);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0 0 16px}
.news-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:13px;color:var(--ink-300);border-top:1px solid var(--line);padding-top:12px}
.news-foot .rd{color:var(--brand-600);font-weight:600}
.empty-state{
  border:1px dashed var(--line);border-radius:16px;background:var(--paper-2);
  padding:56px 24px;text-align:center;
}
.empty-state p{font-size:15px;color:var(--ink-500);margin:14px 0 18px}

/* faq */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-q{
  width:100%;text-align:left;padding:20px 8px 20px 18px;
  font-size:16px;font-weight:600;display:flex;justify-content:space-between;gap:16px;align-items:center;
  transition:color .18s ease;position:relative;
}
.faq-q::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:2px;background:transparent;transition:background .18s ease}
.faq-item.open .faq-q{color:var(--brand-600)}
.faq-item.open .faq-q::before{background:var(--brand-600)}
.faq-q:hover{color:var(--brand-600)}
.faq-q .chev{transition:transform .2s ease;flex:0 0 auto;stroke:var(--ink-300)}
.faq-item.open .faq-q .chev{transform:rotate(180deg);stroke:var(--brand-600)}
.faq-a{overflow:hidden;max-height:0;transition:max-height .2s ease}
.faq-a p{font-size:15px;line-height:1.85;color:var(--ink-500);padding:0 8px 20px 18px;margin:0}

/* footer */
.site-footer{background:var(--ink-900);margin-top:80px;padding:56px 0 24px;color:rgba(255,255,255,.72)}
.footer-card{border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:40px;background:rgba(255,255,255,.02)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1.2fr 1fr 1.1fr;gap:36px}
.site-footer h4{color:#fff;font-size:15px;margin:0 0 16px;font-weight:600}
.site-footer .brand-line{color:#fff;font-size:17px;font-weight:600;margin-bottom:10px}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);margin:0}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.68);transition:color .16s ease;display:inline-block;border-bottom:1px solid transparent}
.footer-links a:hover{color:var(--brand-500);border-bottom-color:var(--brand-500)}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.42);
}

@media (max-width:1023px){
  .nav-slot{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:32px}
  .strip{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:1fr;gap:36px}
  .timeline::before{top:0;bottom:0;left:19px;right:auto;width:0;border-top:0;border-left:2px dashed var(--line)}
  .step{margin-left:0;padding-left:22px}
  .step-node{margin:0 0 12px;position:relative;left:-42px;top:0}
  .step{padding:20px 20px 20px 24px}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento-wide{grid-column:span 2}
  .compare{grid-template-columns:1fr;gap:18px}
  .cta-band{grid-template-columns:1fr;padding:36px 28px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{font-size:15.5px;line-height:1.85}
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section-sm{padding:36px 0}
  .h1,.hero h1{font-size:28px}
  .h2{font-size:22px}
  .h3{font-size:18px}
  .hero{border-radius:20px;padding:40px 0 44px}
  .hero p.hero-sub{font-size:16px}
  .hero-stats{gap:20px}
  .strip{grid-template-columns:1fr}
  .bento{grid-template-columns:1fr}
  .bento-wide{grid-column:span 1}
  .bento-media{grid-row:span 1}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-card{padding:26px}
  .cta-band{padding:28px 20px;border-radius:20px}
  .cta-form{padding:20px}
  .step{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .strip-card:hover,.bento-item:hover,.news-card:hover,.step:hover,.plan:hover{transform:none}
}

/* roulang page: article */
:root{
  --paper:#F7F5F1;--paper-2:#FFFFFF;
  --ink-900:#14101F;--ink-700:#2A2340;--ink-500:#5A5470;--ink-300:#9A94AD;
  --line:#E6E1DA;
  --brand-600:#0E9F7E;--brand-500:#14C79B;--brand-100:#E4F7F1;
  --accent-500:#FF7A2F;--accent-100:#FFEDE0;
  --violet-500:#6C4DE6;--violet-100:#EFEBFD;
  --danger:#D94A3D;
  --r-sm:8px;--r-md:12px;--r-card:16px;--r-panel:20px;
  --shadow-sm:0 1px 2px rgba(20,16,31,.06);
  --shadow-md:0 6px 20px -8px rgba(20,16,31,.18);
  --shadow-lg:0 18px 48px -20px rgba(20,16,31,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink-900);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;line-height:1.9;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
button,input,textarea,select{font-family:inherit;font-size:100%}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;padding:14px 0 10px;background:linear-gradient(180deg,rgba(247,245,241,.96),rgba(247,245,241,.72));backdrop-filter:blur(6px)}
.nav-shell{
  display:flex;align-items:center;gap:14px;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-panel);
  box-shadow:var(--shadow-md);padding:10px 14px;transition:box-shadow .2s ease,padding .2s ease;
}
.site-header.is-stuck .nav-shell{box-shadow:var(--shadow-lg);padding:8px 14px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:36px;height:36px;border-radius:10px;background:var(--ink-900);display:grid;place-items:center}
.logo-text{font-size:17px;font-weight:600;white-space:nowrap}
.nav-slot{display:flex;align-items:center;gap:6px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav-slot::-webkit-scrollbar{display:none}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:var(--r-md);
  border:1px solid transparent;color:var(--ink-700);font-size:14px;font-weight:500;white-space:nowrap;
}
.nav-card svg{stroke:currentColor;flex:0 0 auto}
.nav-card:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-600)}
.nav-card.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.nav-cta{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-md);
  background:var(--accent-500);color:var(--ink-900);font-size:14px;font-weight:600;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;
}
.nav-cta:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.nav-cta:active{transform:none}
.menu-btn{display:none;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--r-md);border:1px solid var(--line);background:#fff;color:var(--ink-700);cursor:pointer}
.menu-btn:hover{border-color:var(--brand-500);color:var(--brand-600)}

.drawer{position:fixed;inset:0;z-index:90;display:none;background:rgba(20,16,31,.55)}
.drawer.open{display:block}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(92vw,390px);
  background:var(--paper);padding:22px;overflow-y:auto;box-shadow:var(--shadow-lg);
  animation:drawerIn .22s ease;
}
@keyframes drawerIn{from{transform:translateX(16px);opacity:.4}to{transform:none;opacity:1}}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:16px;font-weight:600}
.drawer-close{width:40px;height:40px;border-radius:var(--r-md);border:1px solid var(--line);background:#fff;cursor:pointer;color:var(--ink-700)}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.drawer-card{display:flex;flex-direction:column;gap:8px;padding:14px;border-radius:var(--r-card);border:1px solid var(--line);background:#fff;font-size:14px;font-weight:500;color:var(--ink-700)}
.drawer-card:hover{border-color:var(--brand-500);color:var(--brand-600)}
.drawer-card.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.drawer-foot{margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-500)}

/* ---------- 页头 ---------- */
.page-head{position:relative;background:var(--ink-900);color:#fff;border-radius:0 0 28px 28px;overflow:hidden}
.page-head::before{
  content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.26;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,16,31,.72),rgba(20,16,31,.92));
}
.page-head-inner{position:relative;z-index:2;padding:44px 0 52px;max-width:900px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:rgba(255,255,255,.62)}
.crumbs a{color:rgba(255,255,255,.82)}
.crumbs a:hover{color:var(--brand-500)}
.crumbs .sep{color:rgba(255,255,255,.34)}
.crumbs .now{color:var(--ink-300)}
.page-head h1{font-size:42px;font-weight:700;margin:16px 0 18px;color:#fff}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:14px;color:rgba(255,255,255,.72)}
.article-meta .dot{width:4px;height:4px;border-radius:999px;background:rgba(255,255,255,.36)}

/* ---------- 通用组件 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:500;line-height:1.6}
.badge-brand{background:var(--brand-100);color:var(--brand-600)}
.badge-violet{background:var(--violet-100);color:var(--violet-500)}
.badge-accent{background:var(--accent-100);color:#B84A0F}
.badge-dark{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.18)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;border-radius:var(--r-md);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:#0C8C6E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-accent{background:var(--accent-500);color:var(--ink-900)}
.btn-accent:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink-700)}
.btn-outline:hover{border-color:var(--brand-500);color:var(--brand-600)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.5)}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn:active{transform:none}

.card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-sm);padding:24px;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.card-hover:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}

.section{padding:64px 0}
.section-tight{padding:40px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head h2{font-size:30px;font-weight:700}
.section-head .desc{margin-top:8px;font-size:15px;color:var(--ink-500)}

/* ---------- 文章布局 ---------- */
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:36px;align-items:start}
.article-main{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-panel);box-shadow:var(--shadow-sm);padding:36px}
.article-reader{max-width:760px}
.article-body{font-size:17px;line-height:1.9;color:var(--ink-700)}
.article-body h2{font-size:22px;font-weight:600;color:var(--ink-900);margin:2em 0 .8em;padding-left:14px;position:relative}
.article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:2px;background:var(--brand-600)}
.article-body h3{font-size:18px;font-weight:600;color:var(--ink-900);margin:1.6em 0 .6em}
.article-body h2:first-child,.article-body h3:first-child{margin-top:0}
.article-body p{margin:0 0 1.15em}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.15em}
.article-body li{margin-bottom:.6em}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.article-body strong{color:var(--ink-900);font-weight:600}
.article-body img{border-radius:var(--r-md);margin:1.4em auto;box-shadow:var(--shadow-sm)}
.article-body blockquote{margin:1.4em 0;padding:16px 20px;background:var(--brand-100);border-left:4px solid var(--brand-600);border-radius:var(--r-sm);color:var(--ink-700)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body code{background:#F3F0EA;border:1px solid var(--line);border-radius:6px;padding:2px 6px;font-size:15px}
.article-body pre{background:var(--ink-900);color:#EDEAF4;padding:18px;border-radius:var(--r-md);overflow-x:auto;font-size:15px;line-height:1.7}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);margin:1.4em 0}
.table-scroll table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px}
.table-scroll th,.table-scroll td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
.table-scroll th{background:#F3F0EA;font-weight:600;color:var(--ink-900);white-space:nowrap}
.table-scroll tr:last-child td{border-bottom:none}

.empty-card{border:1px dashed var(--line);border-radius:var(--r-panel);background:#fff;padding:56px 24px;text-align:center}
.empty-icon{width:56px;height:56px;margin:0 auto 16px;border-radius:18px;background:var(--brand-100);display:grid;place-items:center;color:var(--brand-600)}
.empty-card h2{font-size:22px;font-weight:600;margin-bottom:10px}
.empty-card p{color:var(--ink-500);font-size:15px;margin-bottom:22px}

.side-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-sm);padding:20px}
.side-card + .side-card{margin-top:20px}
.side-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;margin-bottom:14px}
.side-title::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--brand-600)}
.toc-list a{display:block;font-size:14px;color:var(--ink-500);padding:7px 0 7px 12px;border-left:2px solid var(--line);line-height:1.6}
.toc-list a:hover{color:var(--brand-600);border-color:var(--brand-500)}
.toc-list a.active{color:var(--brand-600);border-color:var(--brand-600);font-weight:600}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--ink-700)}
.side-links a:last-child{border-bottom:none}
.side-links a:hover{color:var(--brand-600)}
.side-links svg{flex:0 0 auto;color:var(--ink-300)}
.side-cta{margin-top:20px;background:var(--ink-900);color:#fff;border-radius:var(--r-card);padding:22px;border:1px solid rgba(255,255,255,.10)}
.side-cta p{font-size:14px;color:rgba(255,255,255,.72);margin:8px 0 16px}

.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:var(--ink-500)}
.tag:hover{border-color:var(--brand-500);color:var(--brand-600)}

.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rec-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;height:100%}
.rec-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.rec-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.rec-thumb img{width:100%;height:100%;object-fit:cover}
.rec-thumb .badge{position:absolute;left:12px;top:12px;background:rgba(20,16,31,.78);color:#fff}
.rec-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rec-body h3{font-size:17px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-body p{font-size:14px;color:var(--ink-500);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-300)}
.rec-foot .more{color:var(--brand-600);font-weight:600}

.faq-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 36px 20px 16px;font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:2px;background:transparent;transition:background-color .2s ease}
.faq-item summary::after{
  content:"";position:absolute;right:10px;top:26px;width:9px;height:9px;
  border-right:2px solid var(--ink-300);border-bottom:2px solid var(--ink-300);
  transform:rotate(45deg);transition:transform .2s ease;
}
.faq-item[open] summary::before{background:var(--brand-600)}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--brand-600)}
.faq-item .answer{padding:0 16px 20px 16px;font-size:15px;line-height:1.85;color:var(--ink-500)}

.cta-band{background:var(--ink-900);border-radius:var(--r-panel);padding:40px;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;opacity:.18}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}
.cta-inner h2{font-size:30px;font-weight:700;color:#fff}
.cta-inner .lead{margin-top:12px;font-size:15px;color:rgba(255,255,255,.74)}
.cta-panel{background:var(--paper-2);border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-lg)}
.field{margin-bottom:14px}
.field label{display:block;font-size:14px;font-weight:500;color:var(--ink-700);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-md);border:1px solid var(--line);background:#fff;color:var(--ink-900);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{height:104px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(20,199,155,.18)}
.form-note{font-size:13px;color:var(--ink-300);margin-top:10px;line-height:1.7}

/* ---------- 页脚 ---------- */
.site-footer{padding:64px 0 32px;background:transparent}
.footer-card{background:var(--ink-900);color:#EDEAF4;border:1px solid rgba(255,255,255,.10);border-radius:var(--r-panel);padding:40px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.brand-line{font-size:17px;font-weight:600;color:#fff;margin-bottom:12px}
.footer-card p{font-size:14px;color:rgba(255,255,255,.68);line-height:1.85}
.footer-card h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
.footer-links a{display:block;font-size:14px;color:rgba(255,255,255,.72);padding:5px 0;position:relative;width:fit-content}
.footer-links a::after{content:"";position:absolute;left:0;bottom:2px;width:0;height:1px;background:var(--brand-500);transition:width .2s ease}
.footer-links a:hover{color:var(--brand-500)}
.footer-links a:hover::after{width:100%}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.52);border-top:1px solid rgba(255,255,255,.10);margin-top:30px;padding-top:18px}

@media (max-width:1023px){
  .nav-slot{display:none}
  .menu-btn{display:inline-flex;margin-left:auto}
  .nav-cta{margin-left:0}
  .article-wrap{grid-template-columns:minmax(0,1fr)}
  .article-main{padding:26px}
  .cta-inner{grid-template-columns:minmax(0,1fr)}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
  .faq-list{grid-template-columns:minmax(0,1fr)}
  .page-head h1{font-size:32px}
  .section{padding:48px 0}
  .section-head h2{font-size:22px}
  .cta-inner h2{font-size:22px}
}
@media (max-width:640px){
  .container{padding:0 16px}
  body{font-size:15.5px;line-height:1.85}
  .logo-text{font-size:15px;white-space:normal;max-width:120px;line-height:1.25}
  .page-head h1{font-size:28px}
  .page-head-inner{padding:32px 0 40px}
  .article-main{padding:20px}
  .rec-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-card{padding:26px}
  .cta-band{padding:24px}
  .drawer-grid{grid-template-columns:1fr 1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --ink-900:#14101F;
  --ink-700:#2A2340;
  --ink-500:#5A5470;
  --ink-300:#9A94AD;
  --line:#E6E1DA;
  --brand-600:#0E9F7E;
  --brand-500:#14C79B;
  --brand-100:#E4F7F1;
  --accent-500:#FF7A2F;
  --accent-100:#FFEDE0;
  --violet-500:#6C4DE6;
  --violet-100:#EFEBFF;
  --danger:#D94A3D;
  --r-sm:8px;
  --r-md:16px;
  --r-lg:20px;
  --r-btn:12px;
  --shadow-sm:0 1px 2px rgba(20,16,31,.06);
  --shadow-md:0 6px 20px -8px rgba(20,16,31,.18);
  --shadow-lg:0 18px 48px -20px rgba(20,16,31,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0}
p{margin:0}
ul{margin:0}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.no-scroll{overflow:hidden}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:60;padding:12px 0;background:var(--paper)}
.nav-shell{
  display:flex;align-items:center;gap:12px;
  background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow-md);
  padding:10px 14px;
  transition:padding .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled .nav-shell{padding:6px 14px;box-shadow:var(--shadow-lg)}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:36px;height:36px;border-radius:10px;background:var(--ink-900);
  display:grid;place-items:center;border:1px solid rgba(255,255,255,.08);
}
.logo-text{font-size:17px;font-weight:600;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.nav-slot{display:flex;align-items:center;gap:6px;margin-left:auto;min-width:0;overflow-x:auto;scrollbar-width:none}
.nav-slot::-webkit-scrollbar{display:none}
.nav-card{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 12px;border-radius:var(--r-btn);
  border:1px solid transparent;font-size:14px;color:var(--ink-500);
  white-space:nowrap;transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.nav-card svg{stroke:currentColor;fill:none;flex:0 0 auto}
.nav-card:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--ink-900)}
.nav-card.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  background:var(--accent-500);color:var(--ink-900);
  font-size:15px;font-weight:600;flex:0 0 auto;
  box-shadow:var(--shadow-sm);
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease;
}
.nav-cta:hover{background:#EE6A1C;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.nav-cta:active{transform:none}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:var(--paper-2);
  color:var(--ink-900);align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:var(--brand-500);background:var(--brand-100)}

.nav-drawer{
  position:fixed;inset:0;z-index:80;background:var(--paper);
  padding:20px 16px 32px;display:flex;flex-direction:column;gap:18px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.nav-drawer.open{opacity:1;visibility:visible;transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:10px 14px;box-shadow:var(--shadow-sm)}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:var(--paper-2);display:grid;place-items:center;cursor:pointer;color:var(--ink-700);
}
.drawer-close:hover{border-color:var(--brand-500);color:var(--brand-600)}
.drawer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.drawer-card{
  display:block;padding:14px 14px 14px 16px;border-radius:var(--r-md);
  background:var(--paper-2);border:1px solid var(--line);font-size:15px;color:var(--ink-700);
  box-shadow:var(--shadow-sm);transition:border-color .18s ease,background .18s ease;
}
.drawer-card:hover{border-color:var(--brand-500);background:var(--brand-100)}
.drawer-card.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px}
.drawer-foot .nav-cta{width:100%;height:48px}
.drawer-note{font-size:13px;color:var(--ink-300);text-align:center}

/* ============ 页头 ============ */
.page-head{padding:48px 0 64px}
.page-head-panel{
  position:relative;overflow:hidden;
  background:var(--ink-900);color:#fff;
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-lg);padding:40px;
}
.page-head-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.45;
  background-image:radial-gradient(rgba(255,255,255,.12) 1px,transparent 1px);
  background-size:18px 18px;
}
.page-head-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
.page-head-copy .badge{margin-bottom:16px}
.page-title{font-size:42px;line-height:1.3;letter-spacing:-.01em;font-weight:700;color:#fff}
.page-lead{margin-top:16px;font-size:17px;line-height:1.9;color:rgba(255,255,255,.72);max-width:34em}
.page-head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.page-head-media{
  margin:0;border-radius:var(--r-md);overflow:hidden;
  border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);
}
.page-head-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.page-head-media figcaption{padding:12px 16px;font-size:13px;color:rgba(255,255,255,.6);border-top:1px solid rgba(255,255,255,.10)}

.breadcrumb{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-300);margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,.68);transition:color .18s ease}
.breadcrumb a:hover{color:var(--brand-500)}
.breadcrumb .current{color:rgba(255,255,255,.9)}

/* ============ 板块 ============ */
.section{padding:80px 0}
.section-tight{padding:64px 0}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand-600);margin-bottom:10px}
.sec-title{font-size:30px;line-height:1.35;letter-spacing:-.01em;font-weight:600;color:var(--ink-900)}
.sec-sub{margin-top:12px;font-size:17px;line-height:1.9;color:var(--ink-500)}

/* ============ 徽章 ============ */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:500;line-height:1.7}
.badge-brand{background:var(--brand-100);color:#0B7C62}
.badge-violet{background:var(--violet-100);color:#4E36B8}
.badge-accent{background:var(--accent-100);color:#B04E12}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  white-space:nowrap;transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:#0C8A6C;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-accent{background:var(--accent-500);color:var(--ink-900);box-shadow:var(--shadow-sm)}
.btn-accent:hover{background:#EE6A1C;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-secondary{background:var(--paper-2);color:var(--ink-900);border-color:var(--line)}
.btn-secondary:hover{border-color:var(--brand-500);color:var(--brand-600)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.32)}
.btn-ghost:hover{background:rgba(255,255,255,.10);border-color:var(--brand-500)}
.btn:active{transform:none}
.btn-block{width:100%}
.btn-lg{height:52px;padding:0 28px;font-size:16px}

/* ============ 通道左图右文 ============ */
.channel-list{display:flex;flex-direction:column;gap:24px}
.channel-item{
  display:grid;grid-template-columns:40% 1fr;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.channel-item:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.channel-media{position:relative;min-height:280px;background:#EDE9E3}
.channel-media img{width:100%;height:100%;object-fit:cover}
.channel-media .badge{position:absolute;left:16px;top:16px;background:rgba(20,16,31,.86);color:#fff}
.channel-body{padding:28px}
.channel-meta{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--ink-300);flex:0 0 auto}
.meta-text{font-size:13px;color:var(--ink-300)}
.card-title{font-size:22px;line-height:1.4;font-weight:600;color:var(--ink-900)}
.card-text{margin-top:10px;font-size:17px;line-height:1.9;color:var(--ink-500)}
.feature-list{list-style:none;padding:0;margin:18px 0 0;display:flex;flex-direction:column;gap:10px}
.feature-list li{position:relative;padding-left:22px;font-size:15px;line-height:1.8;color:var(--ink-500)}
.feature-list li::before{
  content:"";position:absolute;left:0;top:.7em;width:9px;height:9px;border-radius:3px;
  background:var(--brand-100);border:1px solid var(--brand-500);
}
.text-link{display:inline-flex;align-items:center;gap:6px;margin-top:20px;font-size:15px;font-weight:600;color:var(--brand-600);transition:color .18s ease,gap .18s ease}
.text-link::after{content:"→"}
.text-link:hover{color:var(--brand-500);gap:10px}

/* ============ 步骤时间线 ============ */
.steps{position:relative;display:flex;flex-direction:column;gap:18px;padding-left:0}
.steps::before{
  content:"";position:absolute;left:19px;top:22px;bottom:22px;width:2px;
  background-image:linear-gradient(to bottom,var(--line) 0 6px,transparent 6px 12px);
  background-size:2px 12px;
}
.step-item{position:relative;display:grid;grid-template-columns:40px 1fr;gap:18px;align-items:start}
.step-node{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-600);border:1px solid var(--brand-500);
  font-size:14px;font-weight:600;position:relative;z-index:1;
}
.step-item:nth-child(even) .step-node{background:var(--violet-100);color:var(--violet-500);border-color:var(--violet-500)}
.step-body{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px 24px;box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.step-body:hover{border-color:var(--brand-500);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.step-body h3{font-size:18px;font-weight:600;color:var(--ink-900)}
.step-body p{margin-top:8px;font-size:15.5px;line-height:1.85;color:var(--ink-500)}

/* ============ 深面场景面板 ============ */
.scene-panel{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(255,255,255,.08);color:#fff}
.scene-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center}
.scene-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(20,16,31,.95) 0%,rgba(20,16,31,.86) 52%,rgba(20,16,31,.7) 100%)}
.scene-content{position:relative;padding:44px;display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:center}
.scene-content .sec-title{color:#fff}
.scene-content .sec-sub{color:rgba(255,255,255,.7)}
.scene-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.scene-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-md);padding:20px;
  transition:background .18s ease,border-color .18s ease,transform .18s ease;
}
.scene-card:hover{background:rgba(255,255,255,.11);border-color:var(--brand-500);transform:translateY(-3px)}
.scene-card h3{margin-top:12px;font-size:17px;font-weight:600;color:#fff}
.scene-card p{margin-top:8px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.68)}
.scene-card .badge{background:rgba(255,255,255,.10);color:var(--brand-500)}

/* ============ 提示处理 ============ */
.notice-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.notice-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.notice-card:hover{border-color:var(--brand-500);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.notice-card .badge{margin-bottom:12px}
.notice-card h3{font-size:17px;font-weight:600;color:var(--ink-900)}
.notice-card p{margin-top:8px;font-size:15px;line-height:1.85;color:var(--ink-500)}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.faq-col{display:flex;flex-direction:column}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;gap:14px;
  padding:18px 4px 18px 0;font-size:16px;font-weight:600;line-height:1.7;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";flex:0 0 3px;align-self:stretch;border-radius:2px;background:var(--brand-600);
  transform:scaleY(0);transform-origin:top;transition:transform .2s ease;
}
.faq-item summary::after{
  content:"+";margin-left:auto;font-size:20px;font-weight:400;line-height:1;
  color:var(--ink-300);transition:color .2s ease;
}
.faq-item[open] summary::before{transform:scaleY(1)}
.faq-item[open] summary::after{content:"−";color:var(--brand-600)}
.faq-a{padding:0 26px 20px 17px;font-size:15px;line-height:1.85;color:var(--ink-500)}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-900);border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-lg);padding:44px;
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.4;
  background-image:radial-gradient(rgba(255,255,255,.12) 1px,transparent 1px);
  background-size:18px 18px;
}
.cta-band-copy{position:relative}
.cta-title{font-size:30px;line-height:1.35;font-weight:600;color:#fff;letter-spacing:-.01em}
.cta-text{margin-top:14px;font-size:17px;line-height:1.9;color:rgba(255,255,255,.72)}
.cta-points{list-style:none;padding:0;margin:22px 0 0;display:flex;flex-direction:column;gap:10px}
.cta-points li{position:relative;padding-left:22px;font-size:15px;color:rgba(255,255,255,.72)}
.cta-points li::before{content:"";position:absolute;left:0;top:.7em;width:9px;height:9px;border-radius:3px;background:rgba(20,199,155,.24);border:1px solid var(--brand-500)}
.cta-form-card{position:relative;background:var(--paper-2);border-radius:var(--r-md);padding:26px;box-shadow:var(--shadow-lg);color:var(--ink-700)}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:500;color:var(--ink-700);margin-bottom:8px}
.field input,.field select{
  width:100%;height:48px;border-radius:var(--r-btn);border:1px solid var(--line);
  background:#fff;padding:0 14px;font-size:15px;color:var(--ink-900);
  transition:border-color .18s ease,box-shadow .18s ease;
  appearance:none;
}
.field select{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235A5470' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:40px;
}
.field input:focus,.field select:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(14,159,126,.18)}
.field input[aria-invalid="true"]{border-color:var(--danger);box-shadow:0 0 0 3px rgba(217,74,61,.14)}
.form-error{display:none;margin-top:10px;font-size:13px;color:var(--danger)}
.form-error.show{display:block}
.form-success{
  display:none;align-items:center;gap:10px;margin-top:14px;padding:12px 14px;
  border-radius:var(--r-btn);background:var(--brand-100);color:#0B7C62;font-size:14px;line-height:1.7;
}
.form-success.show{display:flex}
.form-note{margin-top:14px;font-size:13px;line-height:1.7;color:var(--ink-300)}

/* ============ 相关入口 ============ */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.entry-card{
  display:block;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r-md);padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.entry-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.entry-icon{width:44px;height:44px;border-radius:12px;background:var(--brand-100);display:grid;place-items:center;color:var(--brand-600);margin-bottom:16px}
.entry-card h3{font-size:18px;font-weight:600;color:var(--ink-900)}
.entry-card p{margin-top:8px;font-size:15px;line-height:1.85;color:var(--ink-500)}
.entry-more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:600;color:var(--brand-600)}
.entry-more::after{content:"→"}

/* ============ 页脚 ============ */
.site-footer{padding:56px 0 40px;background:var(--paper)}
.footer-card{
  background:var(--ink-900);color:rgba(255,255,255,.72);
  border:1px solid rgba(255,255,255,.08);border-radius:var(--r-lg);padding:44px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.brand-line{color:#fff;font-size:18px;font-weight:600;margin-bottom:12px}
.footer-card p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.68)}
.footer-card h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{position:relative;width:fit-content;font-size:14px;color:rgba(255,255,255,.72);transition:color .18s ease}
.footer-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--brand-500);transition:width .22s ease}
.footer-links a:hover{color:var(--brand-500)}
.footer-links a:hover::after{width:100%}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:var(--ink-300);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav-slot{display:none}
  .nav-toggle{display:inline-flex}
  .nav-shell{margin-left:0}
  .logo{margin-right:auto}
  .page-head-grid{grid-template-columns:1fr;gap:28px}
  .scene-content{grid-template-columns:1fr;gap:26px}
  .cta-band{grid-template-columns:1fr;gap:28px}
  .faq-grid{grid-template-columns:1fr;gap:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:64px 0}
}
@media (max-width:900px){
  .channel-item{grid-template-columns:1fr}
  .channel-media{min-height:220px}
  .notice-grid{grid-template-columns:1fr}
  .entry-grid{grid-template-columns:1fr 1fr}
  .scene-cards{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  body{font-size:15.5px;line-height:1.85}
  .container{padding:0 16px}
  .logo-text{font-size:15px}
  .nav-cta{height:40px;padding:0 16px;font-size:14px}
  .page-head{padding:32px 0 48px}
  .page-head-panel{padding:24px}
  .page-title{font-size:28px}
  .page-lead{font-size:15.5px}
  .sec-title{font-size:22px}
  .cta-title{font-size:22px}
  .cta-text{font-size:15.5px}
  .sec-sub{font-size:15.5px}
  .card-title{font-size:19px}
  .card-text{font-size:15.5px}
  .channel-body{padding:20px}
  .section{padding:48px 0}
  .sec-head{margin-bottom:26px}
  .cta-band{padding:24px}
  .footer-card{padding:26px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .step-node{width:36px;height:36px}
  .steps::before{left:17px}
  .entry-grid{grid-template-columns:1fr}
  .scene-content{padding:26px}
  .scene-cards{grid-template-columns:1fr}
}
@media (max-width:520px){
  .page-head-actions .btn{width:100%}
  .channel-media{min-height:190px}
  .faq-item summary{font-size:15px}
  .faq-a{padding-right:8px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .channel-item:hover,.notice-card:hover,.entry-card:hover,.scene-card:hover,.step-body:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --ink-900:#14101F;
  --ink-700:#2A2340;
  --ink-500:#5A5470;
  --ink-300:#9A94AD;
  --line:#E6E1DA;
  --brand-600:#0E9F7E;
  --brand-500:#14C79B;
  --brand-100:#E4F7F1;
  --accent-500:#FF7A2F;
  --accent-100:#FFEDE0;
  --violet-500:#6C4DE6;
  --violet-100:#EFEBFD;
  --danger:#D94A3D;
  --shadow-sm:0 1px 2px rgba(20,16,31,.06);
  --shadow-md:0 6px 20px -8px rgba(20,16,31,.18);
  --shadow-lg:0 18px 48px -20px rgba(20,16,31,.28);
  --r-sm:8px; --r-md:16px; --r-lg:20px; --r-btn:12px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--paper);
  color:var(--ink-700);
  font-size:17px;
  line-height:1.9;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:60;padding:14px 0 6px;background:linear-gradient(180deg,rgba(247,245,241,.96) 60%,rgba(247,245,241,0));transition:padding .22s ease}
.site-header.is-scrolled{padding:8px 0 4px}
.nav-shell{
  display:flex;align-items:center;gap:14px;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-md);
  padding:10px 14px;
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled .nav-shell{box-shadow:var(--shadow-lg)}
.logo{display:flex;align-items:center;gap:10px;flex:none;font-size:17px;font-weight:600;color:var(--ink-900)}
.logo-mark{width:36px;height:36px;border-radius:10px;background:var(--brand-100);border:1px solid #CDEDE3;display:grid;place-items:center}
.logo-text{white-space:nowrap}
.nav-slot{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:14px;font-weight:500;color:var(--ink-700);
  white-space:nowrap;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease,transform .18s ease;
}
.nav-card svg{width:20px;height:20px;fill:none;stroke:currentColor;flex:none}
.nav-card:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-1px)}
.nav-card.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 18px;border-radius:var(--r-btn);
  background:var(--accent-500);color:var(--ink-900);
  font-size:14px;font-weight:600;white-space:nowrap;flex:none;
  transition:background-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.nav-cta:hover{background:#F06A1C;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:var(--paper-2);
  cursor:pointer;flex:none;
}
.nav-toggle svg{width:22px;height:22px;stroke:var(--ink-900);fill:none}
.drawer{position:fixed;inset:0;z-index:80;background:rgba(20,16,31,.5);opacity:0;pointer-events:none;transition:opacity .22s ease}
.drawer.open{opacity:1;pointer-events:auto}
.drawer-panel{
  position:absolute;right:0;top:0;bottom:0;width:min(88vw,380px);
  background:var(--paper-2);padding:22px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease;
  display:flex;flex-direction:column;gap:18px;
}
.drawer.open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-title{font-size:16px;font-weight:600;color:var(--ink-900)}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--paper-2);cursor:pointer;display:grid;place-items:center}
.drawer-close svg{width:20px;height:20px;stroke:var(--ink-700);fill:none}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.drawer-item{
  display:flex;flex-direction:column;gap:8px;
  padding:14px;border:1px solid var(--line);border-radius:var(--r-md);
  font-size:14px;font-weight:500;color:var(--ink-700);background:var(--paper-2);
}
.drawer-item svg{width:22px;height:22px;fill:none;stroke:var(--brand-600)}
.drawer-item:hover{border-color:var(--brand-500);background:var(--brand-100)}
.drawer-item.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.drawer-item.active svg{stroke:#fff}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;border-top:1px solid var(--line);padding-top:16px}
.drawer-foot p{font-size:13px;color:var(--ink-500)}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:#0C8D6F;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0)}
.btn-accent{background:var(--accent-500);color:var(--ink-900)}
.btn-accent:hover{background:#F06A1C;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.3)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-outline{background:var(--paper-2);border-color:var(--line);color:var(--ink-900)}
.btn-outline:hover{border-color:var(--brand-500);color:var(--brand-600)}
.btn-lg{height:52px;font-size:16px;padding:0 28px}
.btn-sm{height:36px;font-size:14px;padding:0 16px}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:4px 12px;border-radius:999px;background:var(--brand-100);color:var(--brand-600)}
.badge-violet{background:var(--violet-100);color:var(--violet-500)}
.badge-accent{background:var(--accent-100);color:#C2551A}
.badge-dark{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.18)}
.icon-box{width:44px;height:44px;border-radius:12px;background:var(--brand-100);display:grid;place-items:center;color:var(--brand-600);margin-bottom:14px;flex:none}
.icon-box svg{width:24px;height:24px;fill:none;stroke:currentColor}
.icon-box.violet{background:var(--violet-100);color:var(--violet-500)}
.icon-box.accent{background:var(--accent-100);color:#C2551A}

.section{padding:80px 0}
.section-tight{padding:52px 0}
.section-head{max-width:780px;margin-bottom:36px}
.section-title{font-size:clamp(22px,3vw,30px);line-height:1.3;letter-spacing:-.01em;color:var(--ink-900);font-weight:700;margin-top:16px}
.section-sub{color:var(--ink-500);font-size:16px;margin-top:12px}

/* ============ 页头区 ============ */
.page-hero{
  background-color:var(--ink-900);
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:18px 18px;
  border-radius:var(--r-lg);
  padding:40px;
  color:#fff;
  overflow:hidden;
}
.page-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.6);flex-wrap:wrap}
.breadcrumb a:hover{color:var(--brand-500)}
.breadcrumb .sep{color:rgba(255,255,255,.35)}
.breadcrumb .current{color:var(--ink-300)}
.page-hero h1{font-size:clamp(28px,4.4vw,42px);line-height:1.3;letter-spacing:-.01em;font-weight:700;color:#fff;margin-top:18px}
.page-hero .lede{font-size:17px;line-height:1.9;color:rgba(255,255,255,.78);margin-top:18px;max-width:640px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);border:1px solid rgba(255,255,255,.12)}

/* ============ Bento 图墙 ============ */
.bento{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:minmax(190px,auto);gap:24px}
.bento-card{
  position:relative;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-sm);padding:24px;overflow:hidden;
  display:flex;flex-direction:column;justify-content:flex-end;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.bento-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.bento-card.span-2{grid-column:span 2}
.bento-card.row-2{grid-row:span 2}
.bento-card.media{padding:0;justify-content:flex-end}
.bento-card.media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.bento-card.media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,16,31,.18) 0%,rgba(20,16,31,.86) 100%)}
.bento-card.media .bento-body{position:relative;z-index:2;padding:24px}
.bento-card.media .bento-body h3{color:#fff}
.bento-card.media .bento-body p{color:rgba(255,255,255,.8)}
.bento-card h3{font-size:20px;line-height:1.35;font-weight:600;color:var(--ink-900);margin-bottom:8px}
.bento-card p{font-size:15px;line-height:1.85;color:var(--ink-500)}
.bento-card.media.row-2{min-height:432px}
.bento-head{position:relative;z-index:2;display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-direction:column-reverse}
.bento-card .mini-tag{font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;background:var(--brand-100);color:var(--brand-600);align-self:flex-start}
.bento-card.media .mini-tag{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.2)}

/* ============ 说明格 ============ */
.note-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.note-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-sm);padding:24px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.note-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.note-card.wide{grid-column:span 2;background:linear-gradient(135deg,#FFFFFF 0%,#F2FBF8 100%)}
.note-card h3{font-size:18px;font-weight:600;color:var(--ink-900);line-height:1.4;margin-bottom:8px}
.note-card p{font-size:15px;line-height:1.85;color:var(--ink-500)}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{
  position:relative;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--shadow-sm);padding:22px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.step:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.step-num{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-size:14px;font-weight:700;background:var(--brand-100);color:var(--brand-600);margin-bottom:14px}
.step:nth-child(even) .step-num{background:var(--violet-100);color:var(--violet-500)}
.step h3{font-size:17px;font-weight:600;color:var(--ink-900);margin-bottom:8px}
.step p{font-size:14.5px;line-height:1.8;color:var(--ink-500)}
.step-line{height:2px;background:var(--line);border-radius:2px;margin:0 0 24px}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px;padding-left:16px}
.faq-item{position:relative;border-bottom:1px solid var(--line);padding:18px 0}
.faq-item[open]::before{content:"";position:absolute;left:-16px;top:18px;bottom:18px;width:3px;background:var(--brand-600);border-radius:2px}
.faq-item summary{
  list-style:none;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink-900);
  display:flex;align-items:center;justify-content:space-between;gap:16px;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .chev{flex:none;width:20px;height:20px;stroke:var(--ink-300);fill:none;transition:transform .2s ease}
.faq-item[open] summary .chev{transform:rotate(180deg);stroke:var(--brand-600)}
.faq-item p{font-size:15px;line-height:1.85;color:var(--ink-500);margin-top:12px}

/* ============ CTA ============ */
.cta-band{
  background-color:var(--ink-900);
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:20px 20px;
  border-radius:var(--r-lg);padding:40px;color:#fff;
}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.cta-grid h2{font-size:clamp(22px,3vw,30px);line-height:1.35;font-weight:700;color:#fff;letter-spacing:-.01em}
.cta-grid .cta-sub{color:rgba(255,255,255,.76);font-size:16px;margin-top:14px}
.cta-points{display:flex;flex-direction:column;gap:10px;margin-top:22px}
.cta-points span{display:flex;align-items:center;gap:10px;font-size:14.5px;color:rgba(255,255,255,.82)}
.cta-points svg{width:18px;height:18px;stroke:var(--brand-500);fill:none;flex:none}
.cta-form{background:var(--paper-2);border-radius:var(--r-md);padding:24px;color:var(--ink-700)}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:500;color:var(--ink-700);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;background:#fff;color:var(--ink-700);
  border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;resize:vertical;line-height:1.8}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--ink-500) 50%),linear-gradient(135deg,var(--ink-500) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(14,159,126,.2)}
.form-note{font-size:13px;color:var(--ink-500);margin-top:12px}
.form-tip{display:none;align-items:center;gap:10px;margin-top:14px;padding:12px 14px;border-radius:var(--r-btn);background:var(--brand-100);color:var(--brand-600);font-size:14px;font-weight:500}
.form-tip.show{display:flex}
.form-tip svg{width:18px;height:18px;stroke:currentColor;fill:none;flex:none}

/* ============ 相关入口 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  display:flex;gap:16px;align-items:center;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.rel-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.rel-card img{width:84px;height:84px;border-radius:12px;object-fit:cover;flex:none}
.rel-card h3{font-size:16px;font-weight:600;color:var(--ink-900);margin-bottom:6px}
.rel-card p{font-size:13.5px;line-height:1.75;color:var(--ink-500)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);padding:64px 0 40px;margin-top:24px}
.footer-card{background:#1C1730;border:1px solid rgba(255,255,255,.10);border-radius:var(--r-lg);padding:40px;color:rgba(255,255,255,.72)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.brand-line{color:#fff;font-size:18px;font-weight:600;margin-bottom:12px}
.footer-card p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66)}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.68);width:fit-content;transition:color .18s ease}
.footer-links a:hover{color:var(--brand-500);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.10);margin-top:32px;padding-top:20px;
  font-size:13px;color:rgba(255,255,255,.48);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav-slot{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-cta{margin-left:0}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento-card.span-2{grid-column:span 2}
  .bento-card.row-2{grid-row:span 1;min-height:260px}
  .note-grid{grid-template-columns:repeat(2,1fr)}
  .note-card.wide{grid-column:span 2}
  .steps{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:1fr;gap:0}
  .page-hero-grid{grid-template-columns:1fr;gap:28px}
  .cta-grid{grid-template-columns:1fr;gap:28px}
  .rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  body{font-size:15.5px;line-height:1.85}
  .container{padding:0 16px}
  .site-header{padding:10px 0 4px}
  .nav-shell{padding:8px 12px;gap:10px}
  .logo-text{font-size:15px}
  .nav-cta{display:none}
  .section{padding:48px 0}
  .section-tight{padding:36px 0}
  .page-hero{padding:24px;border-radius:var(--r-md)}
  .page-hero .lede{font-size:15.5px}
  .bento{grid-template-columns:1fr;gap:16px}
  .bento-card.span-2{grid-column:span 1}
  .bento-card{padding:18px}
  .bento-card.media.row-2{min-height:300px}
  .note-grid{grid-template-columns:1fr;gap:16px}
  .note-card.wide{grid-column:span 1}
  .note-card{padding:18px}
  .steps{grid-template-columns:1fr;gap:16px}
  .faq-grid{padding-left:14px}
  .cta-band{padding:24px;border-radius:var(--r-md)}
  .cta-form{padding:18px}
  .rel-grid{gap:16px}
  .footer-card{padding:24px;border-radius:var(--r-md)}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding:44px 0 28px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --ink-900:#14101F;
  --ink-700:#2A2340;
  --ink-500:#5A5470;
  --ink-300:#9A94AD;
  --line:#E6E1DA;
  --brand-600:#0E9F7E;
  --brand-500:#14C79B;
  --brand-100:#E4F7F1;
  --accent-500:#FF7A2F;
  --accent-100:#FFEDE0;
  --violet-500:#6C4DE6;
  --danger:#D94A3D;
  --shadow-sm:0 1px 2px rgba(20,16,31,.06);
  --shadow-md:0 6px 20px -8px rgba(20,16,31,.18);
  --shadow-lg:0 18px 48px -20px rgba(20,16,31,.28);
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:20px;
  --radius-btn:12px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.tnum{font-variant-numeric:tabular-nums;}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:14px 0;
  background:rgba(247,245,241,.97);
  transition:padding .2s ease,box-shadow .2s ease;
}
.site-header.scrolled{padding:8px 0;}
.nav-shell{
  display:flex;align-items:center;gap:18px;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:10px 16px;
  box-shadow:var(--shadow-md);
}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:36px;height:36px;border-radius:11px;background:var(--ink-900);
  display:grid;place-items:center;flex:0 0 auto;
}
.logo-text{font-size:17px;font-weight:600;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap;}
.nav-slot{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;border-radius:12px;border:1px solid transparent;
  font-size:14px;font-weight:500;color:var(--ink-700);white-space:nowrap;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease,transform .18s ease;
}
.nav-card svg{stroke:currentColor;flex:0 0 auto;}
.nav-card:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--ink-900);transform:translateY(-1px);}
.nav-card.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--accent-500);color:var(--ink-900);
  font-size:14px;font-weight:600;
  padding:11px 20px;border-radius:var(--radius-btn);
  white-space:nowrap;flex:0 0 auto;
  transition:filter .18s ease,transform .18s ease,box-shadow .18s ease;
}
.nav-cta:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.nav-cta:active{transform:translateY(0);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:var(--paper-2);
  align-items:center;justify-content:center;margin-left:auto;
}
.nav-toggle svg{stroke:var(--ink-900);}
.nav-drawer{
  position:fixed;inset:0;z-index:90;background:var(--paper);
  padding:20px 20px 32px;overflow-y:auto;display:none;
}
.nav-drawer.open{display:block;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--paper-2);display:grid;place-items:center;}
.drawer-close svg{stroke:var(--ink-900);}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.drawer-card{
  display:flex;flex-direction:column;gap:8px;
  background:var(--paper-2);border:1px solid var(--line);border-radius:14px;
  padding:16px;font-size:14px;font-weight:500;color:var(--ink-700);
}
.drawer-card svg{stroke:var(--brand-600);}
.drawer-card.active{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.drawer-card.active svg{stroke:#fff;}
.drawer-foot{margin-top:24px;display:flex;flex-direction:column;gap:12px;}
.drawer-foot .nav-cta{width:100%;height:48px;}
.drawer-note{font-size:13px;color:var(--ink-500);line-height:1.8;}

/* ============ 通用 ============ */
.section{padding:80px 0;}
.section-tight{padding:52px 0;}
.sec-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:999px;padding:6px 14px;margin-bottom:16px;
}
.sec-title{
  font-size:30px;line-height:1.3;letter-spacing:-.01em;font-weight:700;color:var(--ink-900);
  position:relative;padding-left:16px;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:4px;background:var(--brand-600);
}
.sec-sub{margin-top:14px;font-size:16px;color:var(--ink-500);line-height:1.85;}
.card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md);}
.card h3{font-size:22px;line-height:1.35;font-weight:600;color:var(--ink-900);margin-bottom:10px;letter-spacing:-.01em;}
.card p{font-size:15.5px;color:var(--ink-500);line-height:1.85;}
.card-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-100);
  display:grid;place-items:center;margin-bottom:16px;
}
.card-icon svg{stroke:var(--brand-600);}
.card-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:14px;font-weight:600;color:var(--brand-600);
}
.card-link:hover{color:var(--brand-500);}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;border-radius:999px;padding:4px 12px;line-height:1.6;
}
.badge-brand{background:var(--brand-100);color:#0A7A61;}
.badge-violet{background:#EEEAFD;color:#4B32B8;}
.badge-accent{background:var(--accent-100);color:#A84B12;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:filter .18s ease,transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-primary:active{transform:translateY(0);}
.btn-accent{background:var(--accent-500);color:var(--ink-900);}
.btn-accent:hover{filter:brightness(.94);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-ghost{background:var(--paper-2);border:1px solid var(--line);color:var(--ink-900);}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);}
.btn-light-ghost{border:1px solid rgba(255,255,255,.34);color:#fff;background:transparent;}
.btn-light-ghost:hover{background:rgba(255,255,255,.12);}
.btn-lg{height:52px;padding:0 28px;font-size:16px;}

/* ============ 面包屑 ============ */
.crumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-500);margin-bottom:20px;flex-wrap:wrap;}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:var(--ink-300);}
.crumb .current{color:var(--ink-300);}

/* ============ 分类页头 ============ */
.cat-hero{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  background-color:var(--ink-900);
  background-image:linear-gradient(115deg,rgba(20,16,31,.96) 0%,rgba(20,16,31,.9) 52%,rgba(42,35,64,.82) 100%),url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  color:#fff;padding:52px;
  border:1px solid rgba(255,255,255,.10);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;
}
.cat-hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.35fr 1fr;gap:44px;align-items:center;}
.cat-hero h1{
  font-size:42px;line-height:1.3;letter-spacing:-.01em;font-weight:700;color:#fff;margin-bottom:18px;
}
.cat-hero .lead{font-size:17px;line-height:1.9;color:rgba(255,255,255,.82);max-width:560px;}
.cat-hero .lead + .lead{margin-top:8px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-figure{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);}
.hero-figure img{width:100%;height:300px;object-fit:cover;}
.hero-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(20,16,31,.72),rgba(20,16,31,0) 62%);}
.hero-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  background:rgba(255,255,255,.94);color:var(--ink-900);
  font-size:13px;font-weight:600;border-radius:999px;padding:6px 14px;
}
.hero-stats{display:flex;flex-wrap:wrap;gap:32px;margin-top:30px;padding-top:26px;border-top:1px solid rgba(255,255,255,.14);}
.hero-stat .num{font-size:22px;font-weight:700;color:#fff;}
.hero-stat .lbl{font-size:13px;color:rgba(255,255,255,.66);}

/* ============ 准备检查（图文） ============ */
.prep-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:40px;align-items:center;}
.prep-figure{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md);background:var(--paper-2);}
.prep-figure img{width:100%;height:360px;object-fit:cover;}
.prep-list{display:flex;flex-direction:column;gap:16px;}
.prep-item{
  display:flex;gap:16px;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:20px 22px;box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.prep-item:hover{border-color:var(--brand-500);transform:translateY(-3px);box-shadow:var(--shadow-md);}
.prep-item .ico{width:40px;height:40px;border-radius:11px;background:var(--brand-100);display:grid;place-items:center;flex:0 0 auto;}
.prep-item .ico svg{stroke:var(--brand-600);}
.prep-item h3{font-size:18px;font-weight:600;color:var(--ink-900);margin-bottom:6px;}
.prep-item p{font-size:15px;color:var(--ink-500);line-height:1.85;}

/* ============ 纵向步骤时间线 ============ */
.steps-wrap{max-width:880px;margin:0 auto;}
.steps{position:relative;}
.steps::before{
  content:"";position:absolute;left:19px;top:14px;bottom:14px;
  border-left:2px dashed var(--line);
}
.step{position:relative;padding-left:72px;margin-bottom:26px;}
.step:last-child{margin-bottom:0;}
.step-dot{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:999px;
  display:grid;place-items:center;font-size:15px;font-weight:700;color:#fff;
  background:var(--brand-600);box-shadow:0 0 0 6px rgba(14,159,126,.10);
}
.step:nth-child(even) .step-dot{background:var(--violet-500);box-shadow:0 0 0 6px rgba(108,77,230,.10);}
.step-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.step-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md);}
.step-top{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:10px;}
.step-card h3{font-size:20px;font-weight:600;color:var(--ink-900);line-height:1.4;}
.step-time{font-size:13px;color:var(--ink-300);}
.step-card p{font-size:15.5px;color:var(--ink-500);line-height:1.88;}
.step-hint{
  margin-top:14px;background:var(--brand-100);border-radius:12px;
  padding:10px 14px;font-size:13.5px;color:#0A7A61;line-height:1.8;
}

/* ============ 版本对比卡 ============ */
.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.compare-card{
  position:relative;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:26px 24px;box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.compare-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--brand-500);}
.compare-card.recommend{border-color:var(--brand-600);box-shadow:var(--shadow-md);}
.compare-flag{
  position:absolute;top:-13px;left:24px;
  background:var(--accent-500);color:var(--ink-900);
  font-size:12px;font-weight:700;border-radius:999px;padding:4px 12px;
}
.compare-card h3{font-size:20px;font-weight:600;color:var(--ink-900);margin-bottom:6px;}
.compare-card .fit{font-size:14px;color:var(--ink-500);margin-bottom:18px;}
.feature-list{display:flex;flex-direction:column;gap:12px;margin-bottom:22px;}
.feature-list li{display:flex;gap:10px;font-size:15px;color:var(--ink-700);line-height:1.7;}
.feature-list svg{flex:0 0 auto;margin-top:5px;stroke:var(--brand-600);}
.feature-list li.no{color:var(--ink-300);}
.feature-list li.no svg{stroke:var(--ink-300);}
.compare-card .btn{margin-top:auto;width:100%;}

/* ============ 检查清单 ============ */
.check-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center;}
.check-figure{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md);}
.check-figure img{width:100%;height:380px;object-fit:cover;}
.check-list{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.check-item{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:18px;box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,transform .18s ease;
}
.check-item:hover{border-color:var(--brand-500);transform:translateY(-3px);}
.check-item strong{display:block;font-size:16px;font-weight:600;color:var(--ink-900);margin-bottom:6px;}
.check-item span{font-size:14px;color:var(--ink-500);line-height:1.8;}

/* ============ 相关入口 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  display:block;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.rel-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md);}
.rel-card h3{font-size:18px;font-weight:600;color:var(--ink-900);margin-bottom:8px;}
.rel-card p{font-size:14.5px;color:var(--ink-500);line-height:1.85;}
.rel-card .go{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand-600);}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-md);
  margin-bottom:14px;padding:0 22px;border-left:3px solid transparent;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item.open{border-left-color:var(--brand-600);box-shadow:var(--shadow-sm);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;text-align:left;font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-q .che{flex:0 0 auto;width:22px;height:22px;position:relative;}
.faq-q .che::before,.faq-q .che::after{
  content:"";position:absolute;background:var(--brand-600);border-radius:2px;transition:transform .2s ease,opacity .2s ease;
}
.faq-q .che::before{left:2px;top:10px;width:18px;height:2px;}
.faq-q .che::after{left:10px;top:2px;width:2px;height:18px;}
.faq-item.open .faq-q .che::after{transform:scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
.faq-a p{font-size:15px;color:var(--ink-500);line-height:1.85;padding:0 0 20px;}

/* ============ CTA ============ */
.cta-band{
  background:var(--ink-900);border-radius:var(--radius-lg);padding:44px;
  background-image:linear-gradient(120deg,rgba(20,16,31,.94),rgba(42,35,64,.92)),url(/assets/images/backpic/back-3.webp);
  background-size:cover;background-position:center;
}
.cta-card{
  background:var(--paper-2);border-radius:var(--radius-lg);padding:34px;
  border:1px solid var(--line);
  display:grid;grid-template-columns:1.3fr 1fr;gap:32px;align-items:center;
}
.cta-card h2{font-size:26px;font-weight:700;color:var(--ink-900);line-height:1.35;margin-bottom:12px;}
.cta-card p{font-size:15.5px;color:var(--ink-500);line-height:1.88;}
.cta-actions{display:flex;flex-direction:column;gap:12px;}
.cta-actions .btn{width:100%;}
.cta-note{font-size:13px;color:var(--ink-300);line-height:1.8;margin-top:10px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);padding:64px 0 32px;margin-top:80px;}
.footer-card{
  background:var(--ink-900);border:1px solid rgba(255,255,255,.10);
  border-radius:var(--radius-lg);padding:44px 40px 26px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-grid .brand-line{font-size:17px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-grid p{font-size:14px;color:rgba(255,255,255,.66);line-height:1.85;}
.footer-grid h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  font-size:14px;color:rgba(255,255,255,.72);
  display:inline-block;position:relative;padding-bottom:2px;
}
.footer-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--brand-500);
  transition:width .2s ease;
}
.footer-links a:hover{color:var(--brand-500);}
.footer-links a:hover::after{width:100%;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:rgba(255,255,255,.42);
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-slot{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-cta{display:none;}
  .cat-hero{padding:36px;}
  .cat-hero-inner{grid-template-columns:1fr;gap:28px;}
  .cat-hero h1{font-size:32px;}
  .hero-figure img{height:250px;}
  .prep-grid,.check-grid{grid-template-columns:1fr;gap:28px;}
  .prep-figure img{height:280px;}
  .check-figure img{height:280px;}
  .compare-grid,.rel-grid{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;}
  .compare-card,.rel-card{flex:0 0 260px;scroll-snap-align:start;}
  .rel-card{flex:0 0 280px;}
  .cta-card{grid-template-columns:1fr;gap:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:56px 0;}
  .sec-title{font-size:23px;}
  .sec-head{margin-bottom:28px;}
}
@media (max-width:767px){
  body{font-size:15.5px;line-height:1.85;}
  .container{padding:0 16px;}
  .nav-shell{padding:8px 12px;gap:12px;}
  .logo-text{font-size:15px;}
  .cat-hero{padding:26px 20px;border-radius:16px;}
  .cat-hero h1{font-size:27px;}
  .cat-hero .lead{font-size:15.5px;}
  .hero-stats{gap:22px;padding-top:20px;}
  .hero-stat .num{font-size:19px;}
  .steps::before{left:17px;}
  .step{padding-left:60px;}
  .step-dot{width:36px;height:36px;font-size:14px;}
  .step-card{padding:18px;}
  .check-list{grid-template-columns:1fr;}
  .cta-band{padding:20px;border-radius:16px;}
  .cta-card{padding:22px;border-radius:16px;}
  .cta-card h2{font-size:21px;}
  .footer-card{padding:28px 20px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .site-footer{padding:44px 0 24px;margin-top:56px;}
  .faq-item{padding:0 16px;}
  .card{padding:18px;}
  .card h3{font-size:19px;}
  .section{padding:44px 0;}
}
@media (max-width:520px){
  .cat-hero h1{font-size:24px;}
  .hero-actions .btn{width:100%;}
  .compare-card,.rel-card{flex:0 0 82%;}
  .section-tight{padding:36px 0;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  .card:hover,.step-card:hover,.prep-item:hover,.compare-card:hover,.rel-card:hover,.check-item:hover{transform:none;}
}

/* roulang page: category4 */
:root{
  --paper:#F7F5F1;
  --paper-2:#FFFFFF;
  --ink-900:#14101F;
  --ink-700:#2A2340;
  --ink-500:#5A5470;
  --ink-300:#9A94AD;
  --line:#E6E1DA;
  --brand-600:#0E9F7E;
  --brand-500:#14C79B;
  --brand-100:#E4F7F1;
  --accent-500:#FF7A2F;
  --accent-100:#FFEDE0;
  --violet-500:#6C4DE6;
  --violet-100:#EFEBFF;
  --danger:#D94A3D;
  --shadow-sm:0 1px 2px rgba(20,16,31,.06);
  --shadow-md:0 6px 20px -8px rgba(20,16,31,.18);
  --shadow-lg:0 18px 48px -20px rgba(20,16,31,.28);
  --r-sm:8px;
  --r-md:16px;
  --r-lg:20px;
  --r-btn:12px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
  color:var(--ink-700);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.3;letter-spacing:-.01em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}

/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:60;padding:12px 0 8px;transition:padding .2s ease}
.site-header.scrolled{padding:8px 0 6px}
.nav-shell{
  display:flex;align-items:center;gap:16px;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-md);
  padding:10px 14px;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.scrolled .nav-shell{box-shadow:var(--shadow-lg)}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:36px;height:36px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink-900);
}
.logo-text{font-size:17px;font-weight:600;color:var(--ink-900);white-space:nowrap}
.nav-slot{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:wrap}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;border-radius:12px;
  font-size:14px;font-weight:500;color:var(--ink-700);
  border:1px solid transparent;background:transparent;
  transition:background .18s ease,border-color .18s ease,color .18s ease,transform .18s ease;
}
.nav-card svg{stroke:currentColor;fill:none;flex:0 0 auto}
.nav-card:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-1px)}
.nav-card.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;flex:0 0 auto;
  background:var(--accent-500);color:var(--ink-900);
  font-size:14px;font-weight:600;
  padding:11px 18px;border-radius:var(--r-btn);
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease;
}
.nav-cta:hover{background:#F06A1E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.nav-cta:active{transform:translateY(0)}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border-radius:12px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--paper-2);cursor:pointer;
}
.nav-toggle svg{stroke:var(--ink-700);fill:none}

/* ============ 抽屉 ============ */
.drawer{
  position:fixed;inset:0;z-index:80;
  background:rgba(20,16,31,.52);
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;
}
.drawer.open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:min(360px,88vw);
  background:var(--paper-2);padding:20px 18px 28px;
  overflow-y:auto;transform:translateX(12px);
  transition:transform .24s ease;border-left:1px solid var(--line);
}
.drawer.open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-head strong{font-size:16px;color:var(--ink-900)}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:var(--paper-2);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
}
.drawer-close svg{stroke:var(--ink-700);fill:none}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:18px}
.drawer-grid .nav-card{
  border:1px solid var(--line);padding:12px 10px;flex-direction:column;align-items:flex-start;gap:6px;font-size:13px;
}
.drawer-note{font-size:13px;color:var(--ink-300);margin-top:14px}

/* ============ Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--ink-900);color:#fff;
  padding:36px 0 64px;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;
}
.cat-hero .container{position:relative;z-index:1}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);flex-wrap:wrap}
.crumbs a{color:rgba(255,255,255,.82)}
.crumbs a:hover{color:var(--brand-500);text-decoration:underline;text-underline-offset:3px}
.crumb-current{color:rgba(255,255,255,.5)}
.hero-grid{display:grid;gap:40px;margin-top:26px;align-items:center}
.hero-title{font-size:28px;color:#fff;margin:0}
.hero-lead{margin-top:16px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.78);max-width:620px}
.hero-metrics{display:flex;gap:28px;margin-top:28px;flex-wrap:wrap}
.metric{display:flex;align-items:center;gap:10px}
.metric svg{stroke:var(--brand-500);fill:none;flex:0 0 auto}
.metric-label{font-size:13px;color:rgba(255,255,255,.6)}
.metric-value{font-size:17px;font-weight:600;color:#fff}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(255,255,255,.10)}
.hero-visual img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(20,16,31,.72),rgba(20,16,31,.06) 58%);
}
.hero-badge{
  position:absolute;left:16px;bottom:16px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.94);color:var(--ink-900);
  font-size:13px;font-weight:600;padding:7px 14px;border-radius:999px;
}
.hero-badge svg{stroke:var(--brand-600);fill:none}

/* ============ 通用板块 ============ */
.section{padding:56px 0}
.section-alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:32px}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:999px;padding:5px 14px;margin-bottom:14px;
}
.sec-kicker.violet{color:var(--violet-500);background:var(--violet-100)}
.sec-kicker.accent{color:#C2510D;background:var(--accent-100)}
h2{font-size:22px}
.sec-head h2{margin-bottom:12px}
.sec-head p{color:var(--ink-500);font-size:16px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px}
.more-link{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px}
.more-link svg{stroke:currentColor;fill:none;transition:transform .18s ease}
.more-link:hover svg{transform:translateX(3px)}

/* ============ 表格 ============ */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:var(--paper-2);box-shadow:var(--shadow-sm)}
.cmp-table{width:100%;border-collapse:collapse;min-width:760px}
.cmp-table th{
  text-align:left;font-size:14px;font-weight:600;color:var(--ink-900);
  padding:16px 20px;background:#FBF9F6;border-bottom:1px solid var(--line);white-space:nowrap;
}
.cmp-table td{
  padding:16px 20px;font-size:15px;color:var(--ink-500);
  border-bottom:1px solid var(--line);vertical-align:top;
}
.cmp-table tbody tr:last-child td{border-bottom:none}
.cmp-table tbody tr:hover{background:#FCFBF9}
.cmp-table td:first-child{color:var(--ink-900);font-weight:500}
.table-tip{margin-top:12px;font-size:13px;color:var(--ink-300)}

/* ============ 步骤 ============ */
.steps-layout{display:grid;gap:36px;align-items:start}
.step-list{display:grid;gap:14px}
.step{
  display:flex;gap:16px;background:var(--paper-2);
  border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.step:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.step-no{
  flex:0 0 auto;width:40px;height:40px;border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:#fff;background:var(--brand-600);
}
.step:nth-child(even) .step-no{background:var(--violet-500)}
.step h3{font-size:18px;margin-bottom:6px}
.step p{font-size:15px;color:var(--ink-500);line-height:1.85}
.figure-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-md)}
.figure-card img{width:100%;aspect-ratio:16/11;object-fit:cover}
.figure-card figcaption{padding:16px 20px;font-size:13px;color:var(--ink-500);border-top:1px solid var(--line)}

/* ============ 设备卡 ============ */
.device-grid{display:grid;gap:20px}
.device-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.device-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.device-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-100);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.device-icon svg{stroke:var(--brand-600);fill:none}
.device-card h3{font-size:18px;margin-bottom:10px}
.device-card ul{display:grid;gap:10px;margin-top:14px}
.device-card li{display:flex;gap:10px;font-size:15px;color:var(--ink-500);line-height:1.8}
.device-card li svg{stroke:var(--brand-600);fill:none;flex:0 0 auto;margin-top:5px}

/* ============ 徽章 ============ */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:4px 12px;border-radius:999px}
.badge-brand{background:var(--brand-100);color:var(--brand-600)}
.badge-violet{background:var(--violet-100);color:var(--violet-500)}
.badge-accent{background:var(--accent-100);color:#C2510D}

/* ============ FAQ ============ */
.faq-grid{display:grid;gap:16px}
.faq-item{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:0 20px;box-shadow:var(--shadow-sm);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:var(--brand-500);box-shadow:inset 3px 0 0 var(--brand-600),var(--shadow-sm)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 34px 18px 0;font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:4px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--ink-300);border-bottom:2px solid var(--ink-300);
  transform:translateY(-70%) rotate(45deg);transition:transform .2s ease,border-color .2s ease;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--brand-600)}
.faq-body{padding:0 0 18px;font-size:15px;line-height:1.85;color:var(--ink-500)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:600;font-size:15px;
  padding:12px 24px;min-height:44px;cursor:pointer;border:1px solid transparent;
  transition:background .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease,color .18s ease;
}
.btn svg{stroke:currentColor;fill:none}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:#0C8C6E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-accent{background:var(--accent-500);color:var(--ink-900)}
.btn-accent:hover{background:#F06A1E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-outline{background:var(--paper-2);border-color:var(--line);color:var(--ink-900)}
.btn-outline:hover{border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-500)}
.btn-sm{min-height:36px;padding:8px 16px;font-size:14px}
.btn-lg{min-height:52px;padding:14px 28px;font-size:16px}
.btn:active{transform:translateY(0)}

/* ============ CTA ============ */
.cta-band{background:var(--ink-900);padding:56px 0;position:relative;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);
  background-size:22px 22px;opacity:.45;pointer-events:none;
}
.cta-band .container{position:relative;z-index:1}
.cta-card{
  background:var(--paper-2);border-radius:var(--r-lg);
  padding:32px;display:grid;gap:32px;box-shadow:var(--shadow-lg);
}
.cta-card h2{font-size:22px;margin-bottom:10px}
.cta-card .cta-desc{font-size:15px;color:var(--ink-500)}
.cta-points{display:grid;gap:10px;margin-top:18px}
.cta-points li{display:flex;gap:10px;font-size:15px;color:var(--ink-500)}
.cta-points li svg{stroke:var(--brand-600);fill:none;flex:0 0 auto;margin-top:5px}
.issue-form{display:grid;gap:16px}
.field{display:grid;gap:8px}
.field label{font-size:14px;font-weight:500;color:var(--ink-900)}
.field input,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#FCFBF9;padding:12px 14px;font-size:15px;line-height:1.7;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.field textarea{min-height:110px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-300)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-600);background:#fff;
  box-shadow:0 0 0 3px rgba(14,159,126,.18);
}
.form-note{font-size:13px;color:var(--ink-300);line-height:1.7}
.form-success{
  display:flex;align-items:center;gap:10px;
  background:var(--brand-100);color:#0B7A60;
  border-radius:var(--r-btn);padding:12px 14px;font-size:14px;font-weight:500;
}
.form-success svg{stroke:var(--brand-600);fill:none;flex:0 0 auto}

/* ============ 相关入口 ============ */
.rel-grid{display:grid;gap:20px}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.rel-card:hover{transform:translateY(-3px);border-color:var(--brand-500);box-shadow:var(--shadow-md)}
.rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.rel-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:17px}
.rel-body p{font-size:14.5px;color:var(--ink-500);line-height:1.8}
.rel-body .more-link{margin-top:auto}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);padding:56px 0 32px;color:rgba(255,255,255,.72)}
.footer-card{
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-lg);
  padding:36px;
}
.footer-grid{display:grid;gap:32px}
.footer-card h4{font-size:15px;color:#fff;margin-bottom:14px}
.brand-line{font-size:17px;font-weight:600;color:#fff;margin-bottom:12px}
.footer-card p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62)}
.footer-links{display:grid;gap:10px}
.footer-links a{
  font-size:14px;color:rgba(255,255,255,.72);width:fit-content;
  background-image:linear-gradient(var(--brand-500),var(--brand-500));
  background-repeat:no-repeat;background-size:0% 1px;background-position:0 100%;
  transition:color .18s ease,background-size .22s ease;
}
.footer-links a:hover{color:var(--brand-500);background-size:100% 1px}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:32px;padding-top:20px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:rgba(255,255,255,.45);
}

@media (min-width:640px){
  .device-grid{grid-template-columns:1fr 1fr}
  .rel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (min-width:1024px){
  .section{padding:80px 0}
  .cat-hero{padding:56px 0 88px}
  .hero-title{font-size:42px}
  .hero-lead{font-size:17px}
  h2{font-size:30px}
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:56px}
  .steps-layout{grid-template-columns:1.15fr .85fr;gap:48px}
  .device-grid{grid-template-columns:repeat(3,1fr)}
  .rel-grid{grid-template-columns:repeat(3,1fr)}
  .faq-grid{grid-template-columns:1fr 1fr}
  .cta-card{grid-template-columns:1fr 1fr;align-items:center;padding:44px}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.1fr}
}
@media (max-width:1023px){
  .nav-slot{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:inline-flex}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .hero-metrics{gap:18px}
  .cta-card{padding:24px}
  .footer-card{padding:24px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .step:hover,.device-card:hover,.rel-card:hover,.btn:hover{transform:none !important}
}