/* roulang page: index */
:root{
  --ink-900:#14171B;
  --ink-800:#1E232A;
  --steel-600:#5B6470;
  --steel-400:#8C949F;
  --silver-300:#C6CBD2;
  --paper:#F7F8F9;
  --sand:#FBF6EC;
  --volt:#F5A623;
  --volt-600:#E08A0B;
  --volt-soft:#FFE9C2;
  --line:rgba(20,23,27,.08);
  --line-dark:rgba(255,255,255,.10);
  --r-card:22px;
  --r-lg:28px;
  --r-btn:14px;
  --r-input:12px;
  --shadow-card:0 18px 40px -28px rgba(20,23,27,.35);
  --shadow-hover:0 28px 56px -28px rgba(20,23,27,.45);
  --shadow-float:0 10px 24px -12px rgba(20,23,27,.30);
  --grad-dark:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
  --grad-volt:linear-gradient(135deg,#FFC24A,#F08A0A);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:130px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  background:var(--paper);
  color:var(--ink-900);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--volt-600);}
button{font-family:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
input,textarea,select{font-family:inherit;}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media(min-width:1024px){.container{padding-left:32px;padding-right:32px;}}
.section{padding:56px 0;}
@media(min-width:1024px){.section{padding:88px 0;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--volt-600);font-weight:700;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--grad-volt);color:#1A1206;box-shadow:0 12px 26px -16px rgba(240,138,10,.9);}
.btn-primary:hover{filter:brightness(1.05);transform:translateY(-1px);color:#1A1206;}
.btn-primary:active{transform:translateY(0) scale(.99);}
.btn-ghost{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.32);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.10);color:#fff;transform:translateY(-1px);}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink-900);}
.btn-outline:hover{border-color:rgba(245,166,35,.5);color:var(--volt-600);transform:translateY(-1px);}
.btn-sm{min-height:42px;padding:0 18px;font-size:14px;border-radius:12px;}
.btn-block{width:100%;}

/* ---------- Topbar ---------- */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.72);font-size:12.5px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:38px;}
.topbar-note{display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-note i{color:var(--volt);}
.topbar-links{display:none;align-items:center;gap:14px;}
.topbar-links a{display:inline-flex;align-items:center;gap:6px;}
.topbar-links a:hover{color:var(--volt);}
.topbar-sep{width:1px;height:12px;background:rgba(255,255,255,.2);}
@media(min-width:768px){.topbar-links{display:flex;}}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,248,249,.9);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 14px 34px -30px rgba(20,23,27,.65);}
.nav-inner{display:flex;align-items:center;gap:18px;height:64px;}
@media(min-width:1024px){.nav-inner{height:72px;gap:22px;}}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad-dark);
  display:grid;place-items:center;color:var(--volt);box-shadow:var(--shadow-float);
  flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text strong{display:block;font-size:15px;font-weight:800;letter-spacing:-.02em;line-height:1.25;}
.brand-text small{display:none;font-size:11px;color:var(--steel-600);letter-spacing:.04em;}
@media(min-width:640px){.brand-text strong{font-size:16px;}.brand-text small{display:block;}}
.nav-search{
  position:relative;display:none;align-items:center;
  flex:1 1 auto;max-width:520px;min-width:220px;height:44px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:0 6px 0 44px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search > i{position:absolute;left:18px;top:50%;transform:translateY(-50%);color:var(--steel-400);font-size:14px;}
.nav-search input{flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--ink-900);}
.nav-search input::placeholder{color:#98A0AB;}
.nav-search button{
  height:34px;padding:0 18px;border:0;border-radius:999px;
  background:var(--grad-volt);color:#1A1206;font-weight:700;font-size:13px;cursor:pointer;
  transition:filter .2s ease;
}
.nav-search button:hover{filter:brightness(1.06);}
.nav-search:focus-within{border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18);}
@media(min-width:1024px){.nav-search{display:flex;}}
.nav-links{display:none;align-items:center;gap:8px;margin-left:auto;}
@media(min-width:1024px){.nav-links{display:flex;}}
.nav-link{
  display:inline-flex;align-items:center;height:42px;padding:0 14px;border-radius:12px;
  font-size:14px;font-weight:600;color:var(--steel-600);white-space:nowrap;
}
.nav-link:hover{background:#fff;color:var(--volt-600);}
.nav-link.is-active{color:var(--ink-900);background:#fff;box-shadow:inset 0 0 0 1px var(--line);}
.nav-toggle{
  display:grid;place-items:center;margin-left:auto;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink-900);cursor:pointer;
}
@media(min-width:1024px){.nav-toggle{display:none;}}
.mobile-drawer{display:none;background:#fff;border-top:1px solid var(--line);padding:16px 20px 22px;}
.mobile-drawer.open{display:block;}
@media(min-width:1024px){.mobile-drawer{display:none !important;}}
.drawer-search{display:flex;max-width:none;margin-bottom:14px;}
.drawer-links{display:grid;gap:4px;}
.drawer-links a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:46px;padding:0 12px;border-radius:12px;font-size:15px;font-weight:600;color:var(--steel-600);
}
.drawer-links a:hover{background:var(--paper);color:var(--volt-600);}
.drawer-links a span{font-size:12px;color:var(--silver-300);}

/* ---------- Catbar ---------- */
.catbar{background:#fff;border-bottom:1px solid var(--line);}
.catbar-inner{display:flex;align-items:center;gap:10px;height:50px;overflow-x:auto;scrollbar-width:none;}
.catbar-inner::-webkit-scrollbar{display:none;}
.cat-pill{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;
  height:34px;padding:0 16px;border-radius:999px;
  font-size:14px;color:var(--steel-600);white-space:nowrap;
  transition:background-color .2s ease,color .2s ease;
}
.cat-pill:hover{background:var(--volt-soft);color:var(--volt-600);}
.cat-pill.is-active{background:var(--volt-soft);color:#8A5200;font-weight:700;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--grad-dark);color:#fff;isolation:isolate;}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(58% 46% at 16% 6%,rgba(245,166,35,.24),transparent 62%),
    radial-gradient(46% 42% at 88% 76%,rgba(245,166,35,.14),transparent 66%);
}
.hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:420px;height:420px;
  border:1px solid rgba(255,255,255,.07);border-radius:50%;z-index:-1;
}
.hero-inner{display:grid;grid-template-columns:1fr;gap:38px;padding-top:52px;padding-bottom:58px;}
@media(min-width:900px){
  .hero-inner{grid-template-columns:1.05fr 1fr;gap:52px;align-items:center;padding-top:76px;padding-bottom:84px;}
}
.hero-copy .eyebrow{color:var(--volt);}
.hero h1{
  margin:16px 0 0;
  font-size:clamp(28px,4.1vw,50px);
  line-height:1.16;
  font-weight:800;
  letter-spacing:-.01em;
  color:#fff;
}
.hero-sub{margin-top:18px;font-size:clamp(15px,1.5vw,17px);line-height:1.85;color:rgba(255,255,255,.76);max-width:34em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:34px;max-width:520px;}
.stat{
  background:rgba(255,255,255,.94);color:var(--ink-900);
  border-radius:16px;padding:12px 14px;box-shadow:var(--shadow-float);
}
.stat strong{display:block;font-size:clamp(18px,2.1vw,23px);font-weight:800;letter-spacing:-.02em;line-height:1.2;font-variant-numeric:tabular-nums;}
.stat span{display:block;font-size:12px;color:var(--steel-600);margin-top:2px;}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:0 46px 90px -46px rgba(0,0,0,.85);aspect-ratio:4/3;}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-badge{
  position:absolute;display:flex;flex-direction:column;line-height:1.25;
  background:#fff;color:var(--ink-900);border-radius:16px;padding:10px 14px;
  box-shadow:var(--shadow-float);
}
.hero-badge strong{font-size:17px;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums;}
.hero-badge span{font-size:11.5px;color:var(--steel-600);}
.badge-a{left:14px;bottom:14px;}
.badge-b{right:14px;top:14px;}

/* ---------- Section head ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:26px;}
.sec-head h2{font-size:clamp(23px,2.6vw,34px);line-height:1.28;font-weight:700;letter-spacing:-.01em;margin:0;}
.sec-head p{font-size:14px;color:var(--steel-600);margin-top:8px;max-width:52em;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--volt-600);white-space:nowrap;}
.link-more:hover{color:var(--volt-600);text-decoration:underline;}

/* ---------- Product grid ---------- */
.grid-products{display:grid;grid-template-columns:1fr;gap:20px;}
@media(min-width:640px){.grid-products{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.grid-products{grid-template-columns:repeat(3,1fr);gap:24px;}}
.p-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:box-shadow .3s ease,border-color .3s ease,transform .3s ease;
}
.p-card:hover{box-shadow:var(--shadow-hover);border-color:rgba(245,166,35,.45);transform:translateY(-2px);}
.p-media{position:relative;overflow:hidden;aspect-ratio:16/10;background:#EEF0F2;}
.p-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.p-card:hover .p-media img{transform:scale(1.03);}
.p-tag{
  position:absolute;left:14px;top:14px;
  background:var(--volt-soft);color:#8A5200;font-size:12px;font-weight:700;
  padding:4px 11px;border-radius:999px;
}
.p-body{display:flex;flex-direction:column;gap:10px;padding:18px;flex:1 1 auto;}
.p-title{
  font-size:17px;font-weight:700;line-height:1.5;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.p-specs{
  display:flex;flex-wrap:wrap;gap:4px 16px;font-size:13px;color:var(--steel-600);
  padding-top:10px;border-top:1px solid var(--line);
}
.p-specs span{display:inline-flex;align-items:center;gap:5px;}
.p-specs i{color:var(--silver-300);font-size:11px;}
.p-pricing{display:flex;align-items:baseline;gap:8px;margin-top:auto;}
.p-price{font-size:19px;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums;}
.p-price small{font-size:12px;font-weight:600;color:var(--steel-600);margin-left:2px;}
.p-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:2px;}
.p-card .btn-sm{min-height:40px;padding:0 16px;font-size:13px;}
@media(min-width:1024px){
  .p-card.is-feature{grid-column:span 2;display:grid;grid-template-columns:1.1fr 1fr;}
  .p-card.is-feature .p-media{aspect-ratio:auto;height:100%;min-height:300px;}
  .p-card.is-feature .p-body{padding:24px;}
  .p-card.is-feature .p-title{font-size:21px;-webkit-line-clamp:3;}
}

/* ---------- Guarantee ---------- */
.guarantee{background:var(--sand);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.guarantee-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;padding:38px 0;}
@media(min-width:900px){.guarantee-grid{grid-template-columns:repeat(4,1fr);gap:26px;padding:44px 0;}}
.g-item{display:flex;gap:13px;align-items:flex-start;}
.g-icon{
  width:44px;height:44px;flex:0 0 auto;border-radius:14px;
  background:#fff;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--volt-600);font-size:16px;
}
.g-item strong{display:block;font-size:14.5px;font-weight:700;line-height:1.5;}
.g-item span{display:block;font-size:12.5px;color:var(--steel-600);line-height:1.6;margin-top:2px;}

/* ---------- Reviews ---------- */
.review-viewport{position:relative;}
.review-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 20px;scrollbar-width:none;
}
@media(min-width:1024px){.review-track{gap:24px;}}
.review-track::-webkit-scrollbar{display:none;}
.review-card{
  flex:0 0 86%;scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:22px;
  padding:24px;box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;gap:14px;
}
@media(min-width:768px){.review-card{flex:0 0 calc((100% - 20px) / 2);}}
@media(min-width:1024px){.review-card{flex:0 0 calc((100% - 48px) / 3);}}
.stars{display:inline-flex;align-items:center;gap:3px;color:var(--volt);font-size:13px;}
.stars em{font-style:normal;font-size:12px;color:var(--steel-600);margin-left:8px;font-weight:600;}
.review-text{font-size:14.5px;line-height:1.85;color:#3D444D;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;}
.review-user{display:flex;align-items:center;gap:11px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 auto;
  background:var(--grad-dark);color:var(--volt);
  display:grid;place-items:center;font-weight:800;font-size:14px;
}
.review-user strong{display:block;font-size:14px;font-weight:700;line-height:1.3;}
.review-user span{display:block;font-size:12px;color:var(--steel-600);}
.review-nav{display:flex;gap:10px;}
.rev-btn{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--ink-900);cursor:pointer;display:grid;place-items:center;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.rev-btn:hover{background:var(--volt-soft);border-color:rgba(245,166,35,.5);color:var(--volt-600);}
.review-dots{display:flex;gap:8px;justify-content:center;margin-top:6px;}
.review-dots button{
  width:8px;height:8px;border:0;border-radius:999px;background:var(--silver-300);
  cursor:pointer;padding:0;transition:width .25s ease,background-color .25s ease;
}
.review-dots button.is-active{width:26px;background:var(--volt);}

/* ---------- CTA form ---------- */
.cta-card{
  position:relative;overflow:hidden;
  background:var(--grad-dark);color:#fff;
  border-radius:var(--r-lg);padding:34px 22px;
}
@media(min-width:768px){.cta-card{padding:44px 34px;}}
.cta-card::before{
  content:"";position:absolute;right:-90px;bottom:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(245,166,35,.26),transparent 66%);
}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr;gap:30px;}
@media(min-width:900px){.cta-grid{grid-template-columns:1fr 1fr;gap:44px;align-items:center;}}
.cta-grid h2{font-size:clamp(23px,2.7vw,34px);line-height:1.3;font-weight:700;letter-spacing:-.01em;margin:0;}
.cta-grid p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.74);margin-top:14px;}
.cta-points{display:grid;gap:10px;margin-top:20px;}
.cta-points li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:rgba(255,255,255,.82);}
.cta-points i{color:var(--volt);margin-top:5px;font-size:12px;}
.cta-form{background:rgba(255,255,255,.04);border:1px solid var(--line-dark);border-radius:20px;padding:22px;}
@media(min-width:768px){.cta-form{padding:26px;}}
.form-field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px;}
.form-field label{font-size:12.5px;color:rgba(255,255,255,.72);letter-spacing:.02em;}
.form-field input,.form-field textarea{
  width:100%;min-height:48px;border-radius:var(--r-input);
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);
  color:#fff;padding:0 14px;font-size:14px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.form-field textarea{min-height:92px;padding:12px 14px;resize:vertical;line-height:1.7;}
.form-field input::placeholder,.form-field textarea::placeholder{color:rgba(255,255,255,.42);}
.form-field input:focus,.form-field textarea:focus{
  border-color:var(--volt);background:rgba(255,255,255,.09);
  box-shadow:0 0 0 3px rgba(245,166,35,.18);
}
.form-note{font-size:12px;color:rgba(255,255,255,.52);margin-top:10px;line-height:1.7;}

/* ---------- News / CMS ---------- */
.news-list{display:grid;grid-template-columns:1fr;gap:16px;}
@media(min-width:1024px){.news-list{grid-template-columns:repeat(2,1fr);gap:20px;}}
.news-item{
  display:grid;grid-template-columns:104px 1fr;gap:14px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.news-item:hover{border-color:rgba(245,166,35,.45);box-shadow:var(--shadow-card);transform:translateY(-2px);}
.news-thumb{width:100%;aspect-ratio:4/3;border-radius:12px;overflow:hidden;background:#EEF0F2;}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-body{display:flex;flex-direction:column;gap:8px;min-width:0;}
.news-title{
  font-size:15.5px;font-weight:700;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-item:hover .news-title{color:var(--volt-600);}
.news-desc{
  font-size:13px;line-height:1.75;color:var(--steel-600);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--steel-400);margin-top:2px;}
.news-cat{background:var(--volt-soft);color:#8A5200;font-weight:700;padding:2px 9px;border-radius:999px;}
.news-empty{
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  background:#fff;border:1px dashed var(--silver-300);border-radius:18px;text-align:center;padding:24px;
}
.news-empty i{font-size:26px;color:var(--silver-300);}
.news-empty p{font-size:14px;color:var(--steel-600);}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 20px;
  transition:background-color .25s ease,border-color .25s ease;
}
.faq-item[open]{background:var(--sand);border-color:rgba(245,166,35,.35);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 0;font-size:16px;font-weight:600;cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-ic{color:var(--volt-600);transition:transform .25s ease;font-size:15px;flex:0 0 auto;}
.faq-item[open] .faq-ic{transform:rotate(45deg);}
.faq-answer{padding:0 0 20px;font-size:15px;line-height:1.9;color:#3D444D;}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:0;}
.footer-main{padding:52px 0 8px;}
@media(min-width:1024px){.footer-main{padding:64px 0 12px;}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:40px;}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text small{color:rgba(255,255,255,.5);}
.footer-intro{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.6);max-width:34em;}
.footer-title{font-size:14px;font-weight:700;color:#fff;letter-spacing:.03em;margin:0 0 14px;}
.footer-links a{display:block;padding:6px 0;font-size:14px;color:rgba(255,255,255,.66);min-height:32px;}
.footer-links a:hover{color:var(--volt);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;padding:6px 0;font-size:14px;color:rgba(255,255,255,.66);}
.footer-contact i{color:var(--volt);margin-top:6px;font-size:12px;}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:18px 0 22px;font-size:12.5px;color:rgba(255,255,255,.45);
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
}
.footer-bottom a{color:rgba(255,255,255,.55);}
.footer-bottom a:hover{color:var(--volt);}

@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --ink-900:#14171B;
  --ink-800:#1E232A;
  --ink-700:#2A3038;
  --steel-600:#5B6470;
  --steel-400:#8A929C;
  --silver-300:#C6CBD2;
  --silver-200:#E4E7EB;
  --paper:#F7F8F9;
  --sand:#FBF6EC;
  --volt:#F5A623;
  --volt-600:#E08A0B;
  --volt-soft:#FFE9C2;
  --line:rgba(20,23,27,.08);
  --line-strong:rgba(20,23,27,.14);
  --line-dark:rgba(255,255,255,.12);
  --radius-card:22px;
  --radius-xl:28px;
  --radius-btn:14px;
  --radius-input:12px;
  --shadow-card:0 18px 40px -28px rgba(20,23,27,.35);
  --shadow-hover:0 28px 56px -28px rgba(20,23,27,.45);
  --shadow-badge:0 10px 24px -12px rgba(20,23,27,.30);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-900);
  background:var(--paper);
  font-feature-settings:"tnum";
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--volt-600)}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}

/* ---------- top bar ---------- */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.82);font-size:12.5px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:38px;gap:16px}
.topbar-left{display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-left i{color:var(--volt)}
.topbar-right{display:flex;align-items:center;gap:18px;white-space:nowrap}
.topbar-right a{color:rgba(255,255,255,.82)}
.topbar-right a:hover{color:var(--volt)}
@media (max-width:767px){.topbar-right{display:none}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,248,249,.93);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;height:72px}
@media (max-width:1023px){.header-inner{height:64px;gap:12px}}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;flex-shrink:0;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);
  color:#1B1200;box-shadow:0 8px 18px -10px rgba(224,138,11,.9);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:-.01em}
.brand-text small{font-size:11px;color:var(--steel-400);letter-spacing:.02em}
@media (max-width:520px){.brand-text strong{font-size:15px}.brand-text small{display:none}}

.header-search{position:relative;flex:1 1 auto;max-width:520px;min-width:200px}
.header-search input{
  width:100%;height:44px;border-radius:999px;border:1px solid var(--silver-200);
  background:#fff;padding:0 100px 0 44px;font-size:14px;color:var(--ink-900);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.header-search input::placeholder{color:var(--steel-400)}
.header-search input:focus{
  outline:none;border-color:var(--volt);
  box-shadow:0 0 0 3px rgba(245,166,35,.18);
}
.header-search .s-icon{
  position:absolute;left:17px;top:50%;transform:translateY(-50%);
  color:var(--steel-400);font-size:14px;pointer-events:none;
}
.header-search .s-btn{
  position:absolute;right:5px;top:50%;transform:translateY(-50%);
  height:34px;padding:0 18px;border:none;border-radius:999px;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);color:#241400;
  font-size:13px;font-weight:700;cursor:pointer;transition:filter .2s ease,transform .15s ease;
}
.header-search .s-btn:hover{filter:brightness(1.05)}
.header-search .s-btn:active{transform:translateY(-50%) scale(.98)}
@media (max-width:1023px){.header-search{display:none}}

.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0}
.quick-link{
  display:inline-flex;align-items:center;gap:7px;height:44px;padding:0 12px;
  font-size:13.5px;color:var(--steel-600);border-radius:12px;transition:background .2s ease,color .2s ease;
}
.quick-link i{font-size:14px;color:var(--steel-400)}
.quick-link:hover{background:rgba(245,166,35,.1);color:var(--ink-900)}
.quick-link:hover i{color:var(--volt-600)}
@media (max-width:1100px){.quick-link span{display:none}.quick-link{padding:0 10px}}
.menu-btn{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--silver-200);
  background:#fff;color:var(--ink-900);font-size:17px;cursor:pointer;
}
@media (max-width:1023px){.menu-btn{display:inline-grid;place-items:center}}

.nav-bar{border-top:1px solid var(--line)}
.nav-links{
  display:flex;align-items:center;gap:6px;height:48px;overflow-x:auto;scrollbar-width:none;
}
.nav-links::-webkit-scrollbar{display:none}
.nav-link{
  display:inline-flex;align-items:center;white-space:nowrap;
  padding:7px 15px;border-radius:999px;font-size:14px;color:var(--steel-600);
  transition:background .2s ease,color .2s ease;
}
.nav-link:hover{background:rgba(245,166,35,.1);color:var(--ink-900)}
.nav-link.is-active{background:var(--volt-soft);color:#6B4300;font-weight:700}

.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;padding:16px 20px 20px;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer .header-search{display:block;max-width:none;margin-bottom:14px}
.mobile-nav{display:flex;flex-direction:column;gap:4px}
.mobile-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:44px;padding:0 14px;border-radius:12px;font-size:14.5px;color:var(--ink-700);
  background:var(--paper);
}
.mobile-nav a.is-active{background:var(--volt-soft);color:#6B4300;font-weight:700}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .15s ease,filter .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:active{transform:translateY(0) scale(.99)}
.btn-primary{
  background:linear-gradient(135deg,#FFC24A,#F08A0A);color:#241400;
  box-shadow:0 14px 26px -18px rgba(224,138,11,.95);
}
.btn-primary:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 20px 34px -20px rgba(224,138,11,.95);color:#241400}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.38);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;transform:translateY(-1px)}
.btn-outline{background:#fff;border-color:var(--silver-200);color:var(--ink-900)}
.btn-outline:hover{border-color:rgba(245,166,35,.6);color:var(--volt-600);transform:translateY(-1px)}
.btn-sm{min-height:40px;padding:0 16px;font-size:13.5px}
.btn-block{width:100%}

/* ---------- section ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:80px 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;flex-wrap:wrap}
.section-title{font-size:clamp(23px,2.6vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.section-desc{color:var(--steel-600);font-size:14.5px;margin-top:8px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink-900);min-height:44px}
.text-link i{font-size:12px;transition:transform .2s ease}
.text-link:hover{color:var(--volt-600)}
.text-link:hover i{transform:translateX(4px)}

/* ---------- hero ---------- */
.page-hero{position:relative;overflow:hidden;isolation:isolate;color:#fff;background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%)}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;opacity:.22;
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(60% 80% at 82% 18%,rgba(245,166,35,.24),transparent 62%);
}
.hero-inner{padding:34px 0 52px}
@media (min-width:1024px){.hero-inner{padding:44px 0 76px}}
.crumbs{display:flex;align-items:center;gap:8px;font-size:12.5px;color:rgba(255,255,255,.62);flex-wrap:wrap}
.crumbs a{color:rgba(255,255,255,.62)}
.crumbs a:hover{color:var(--volt)}
.crumbs .sep{opacity:.5}
.crumbs .current{color:#fff}
.hero-grid{display:grid;grid-template-columns:1fr;gap:32px;margin-top:26px}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.12fr .88fr;gap:44px;align-items:center}}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:5px 14px;border-radius:999px;
  background:rgba(245,166,35,.16);border:1px solid rgba(245,166,35,.4);
  color:#FFD79A;font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.hero-title{
  font-size:clamp(28px,4.1vw,50px);line-height:1.16;font-weight:800;letter-spacing:-.01em;
  margin-top:18px;max-width:16em;
}
.hero-title em{font-style:normal;color:var(--volt)}
.hero-sub{margin-top:16px;font-size:15.5px;line-height:1.85;color:rgba(255,255,255,.78);max-width:36em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-badges{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:30px;max-width:520px}
@media (max-width:520px){.hero-badges{grid-template-columns:repeat(2,minmax(0,1fr))}}
.hero-badge{
  background:#fff;color:var(--ink-900);border-radius:16px;padding:12px 14px;
  box-shadow:var(--shadow-badge);
}
.hero-badge strong{display:block;font-size:20px;font-weight:800;line-height:1.2;letter-spacing:-.02em}
.hero-badge span{display:block;font-size:11.5px;color:var(--steel-600);margin-top:3px}

.hero-figure{position:relative}
.hero-figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-xl);
  box-shadow:0 34px 60px -34px rgba(0,0,0,.7);border:1px solid rgba(255,255,255,.14);
}
.hero-float{
  position:absolute;left:16px;bottom:16px;background:#fff;color:var(--ink-900);
  border-radius:16px;padding:11px 15px;box-shadow:var(--shadow-badge);
  display:flex;align-items:center;gap:10px;
}
.hero-float i{color:var(--volt-600);font-size:17px}
.hero-float strong{display:block;font-size:15px;font-weight:800;line-height:1.2}
.hero-float span{display:block;font-size:11.5px;color:var(--steel-600)}

/* ---------- filter chips ---------- */
.filter-bar{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
.filter-bar::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;gap:7px;white-space:nowrap;
  min-height:42px;padding:0 18px;border-radius:999px;border:1px solid var(--silver-200);
  background:#fff;color:var(--steel-600);font-size:14px;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .15s ease;
}
.chip i{font-size:12px;opacity:.7}
.chip:hover{border-color:rgba(245,166,35,.55);color:var(--ink-900);transform:translateY(-1px)}
.chip.is-on{background:var(--ink-900);border-color:var(--ink-900);color:#fff;font-weight:600}
.chip.is-on i{color:var(--volt);opacity:1}

/* ---------- parts grid ---------- */
.parts-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
@media (max-width:1279px){.parts-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:1023px){.parts-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}}
@media (max-width:520px){.parts-grid{grid-template-columns:1fr}}

.part-card{
  display:flex;flex-direction:column;background:#fff;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:border-color .3s ease,box-shadow .3s ease,transform .3s ease;
}
.part-card:hover{border-color:rgba(245,166,35,.45);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.part-media{position:relative;overflow:hidden;background:#EEF0F2;aspect-ratio:4/3}
.part-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.part-card:hover .part-media img{transform:scale(1.03)}
.part-tag{
  position:absolute;left:12px;top:12px;background:rgba(20,23,27,.84);
  color:#fff;font-size:11.5px;font-weight:600;padding:4px 11px;border-radius:999px;
  letter-spacing:.02em;
}
.part-tag.is-volt{background:rgba(245,166,35,.94);color:#241400}
.part-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:10px;flex:1}
.part-title{
  font-size:16px;font-weight:700;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  min-height:2.9em;
}
.part-specs{
  border-top:1px solid var(--line);padding-top:10px;
  display:flex;flex-direction:column;gap:4px;font-size:12.5px;color:var(--steel-600);
}
.part-specs b{font-weight:600;color:var(--ink-700)}
.part-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:4px}
.price{font-size:18px;font-weight:800;letter-spacing:-.02em;color:var(--ink-900)}
.price small{font-size:12px;font-weight:400;color:var(--steel-400);margin-left:2px}
.part-card.is-wide{grid-column:span 2}
.part-card.is-wide .part-media{aspect-ratio:16/9}
@media (max-width:1023px){.part-card.is-wide{grid-column:span 2}.part-card.is-wide .part-media{aspect-ratio:16/9}}
@media (max-width:767px){.part-card.is-wide{grid-column:span 1}.part-card.is-wide .part-media{aspect-ratio:4/3}}

.load-more{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:36px}
.load-more .note{font-size:12.5px;color:var(--steel-400)}

/* ---------- assurance ---------- */
.assurance{
  background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
  border-radius:var(--radius-xl);color:#fff;padding:34px 26px;
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px;
}
@media (max-width:1023px){.assurance{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;padding:28px 22px}}
@media (max-width:520px){.assurance{grid-template-columns:1fr}}
.assure-item{display:flex;flex-direction:column;gap:6px}
.assure-item i{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:rgba(245,166,35,.16);border:1px solid rgba(245,166,35,.34);
  color:var(--volt);font-size:15px;margin-bottom:4px;
}
.assure-item strong{font-size:14.5px;font-weight:700}
.assure-item span{font-size:12.5px;line-height:1.7;color:rgba(255,255,255,.66)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:880px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:0 20px;transition:background .25s ease,border-color .25s ease;
}
.faq-item[open]{background:var(--sand);border-color:rgba(245,166,35,.35)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;font-size:15.5px;font-weight:600;line-height:1.6;padding:10px 0;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:var(--volt-soft);color:#6B4300;font-size:11px;transition:transform .25s ease;
}
.faq-item[open] summary i{transform:rotate(45deg)}
.faq-answer{padding:0 0 18px;font-size:14.5px;line-height:1.9;color:var(--steel-600);max-width:62em}

/* ---------- CTA ---------- */
.cta-card{
  position:relative;overflow:hidden;color:#fff;border-radius:var(--radius-xl);
  background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
  padding:34px 26px;display:grid;grid-template-columns:1fr;gap:30px;
}
@media (min-width:1024px){.cta-card{grid-template-columns:1.05fr .95fr;padding:50px 46px;gap:48px;align-items:center}}
.cta-card::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(50% 70% at 12% 8%,rgba(245,166,35,.22),transparent 60%);
}
.cta-copy{position:relative;z-index:1}
.cta-copy h2{font-size:clamp(23px,2.8vw,34px);line-height:1.28;font-weight:700;letter-spacing:-.01em}
.cta-copy p{margin-top:14px;font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.74);max-width:34em}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.cta-points span{
  display:inline-flex;align-items:center;gap:7px;font-size:12.5px;
  padding:6px 13px;border-radius:999px;background:rgba(255,255,255,.09);
  border:1px solid var(--line-dark);color:rgba(255,255,255,.86);
}
.cta-points i{color:var(--volt);font-size:11px}
.cta-form{position:relative;z-index:1;display:flex;flex-direction:column;gap:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:12.5px;color:rgba(255,255,255,.7)}
.field input,.field textarea{
  width:100%;border-radius:var(--radius-input);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.07);color:#fff;font-size:14px;padding:0 14px;height:48px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{height:92px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.42)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--volt);background:rgba(255,255,255,.1);
  box-shadow:0 0 0 3px rgba(245,166,35,.18);
}
.form-note{font-size:12px;color:rgba(255,255,255,.5);line-height:1.7}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:20px}
.footer-main{padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;padding-bottom:44px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .brand-mark{width:36px;height:36px}
.footer-brand strong{display:block;font-size:16px;color:#fff;font-weight:800;line-height:1.3}
.footer-brand small{display:block;font-size:11.5px;color:rgba(255,255,255,.5)}
.footer-intro{margin-top:16px;font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.6);max-width:32em}
.footer-title{font-size:13px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.04em}
.footer-links a{display:block;font-size:13.5px;line-height:2.1;color:rgba(255,255,255,.68)}
.footer-links a:hover{color:var(--volt)}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;line-height:2.1;color:rgba(255,255,255,.68)}
.footer-contact i{color:var(--volt);font-size:12.5px;margin-top:7px;flex-shrink:0}
.footer-bottom{
  border-top:1px solid var(--line-dark);padding:18px 0 22px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;color:rgba(255,255,255,.46);
}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--volt)}
@media (max-width:520px){.footer-main{padding-top:40px}}

/* roulang page: category2 */
:root{
    --ink-900:#14171B;
    --ink-800:#1E232A;
    --steel-700:#3A424C;
    --steel-600:#5B6470;
    --silver-300:#C6CBD2;
    --paper:#F7F8F9;
    --sand:#FBF6EC;
    --volt:#F5A623;
    --volt-600:#E08A0B;
    --volt-soft:#FFE9C2;
    --line:rgba(20,23,27,.08);
    --line-dark:rgba(255,255,255,.12);
    --radius-card:22px;
    --radius-big:28px;
    --radius-btn:14px;
    --shadow-card:0 18px 40px -28px rgba(20,23,27,.35);
    --shadow-card-hover:0 28px 56px -28px rgba(20,23,27,.45);
    --shadow-float:0 10px 24px -12px rgba(20,23,27,.30);
    --grad-dark:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
    --grad-volt:linear-gradient(135deg,#FFC24A,#F08A0A);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
    background:var(--paper);
    color:var(--ink-900);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  :focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:6px;}
  .num{font-family:"Inter",ui-sans-serif,system-ui,sans-serif;font-variant-numeric:tabular-nums;letter-spacing:-.02em;}

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

  /* ---------- 顶部信息条 ---------- */
  .info-bar{background:var(--ink-900);color:rgba(255,255,255,.78);font-size:12.5px;}
  .info-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;}
  .info-left{display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .info-left i{color:var(--volt);}
  .info-right{display:flex;align-items:center;gap:20px;white-space:nowrap;}
  .info-right a{color:rgba(255,255,255,.82);transition:color .2s ease;}
  .info-right a:hover{color:var(--volt);}
  @media (max-width:767px){ .info-right{display:none;} }

  /* ---------- 主导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(247,248,249,.86);
    backdrop-filter:saturate(160%) blur(14px);
    -webkit-backdrop-filter:saturate(160%) blur(14px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{display:flex;align-items:center;gap:20px;min-height:72px;}
  .brand{display:inline-flex;align-items:center;gap:10px;flex:none;}
  .brand-mark{
    width:38px;height:38px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
    background:var(--grad-dark);color:var(--volt);box-shadow:var(--shadow-float);flex:none;
  }
  .brand-mark svg{width:20px;height:20px;}
  .brand-text{display:flex;flex-direction:column;line-height:1.2;}
  .brand-text strong{font-size:16px;font-weight:800;letter-spacing:-.01em;}
  .brand-text small{font-size:11px;color:var(--steel-600);font-weight:400;letter-spacing:.02em;}

  .search-form{
    flex:1 1 auto;
    display:flex;align-items:center;gap:8px;
    width:clamp(280px,34vw,520px);max-width:520px;
    background:#fff;border:1px solid var(--line);border-radius:999px;
    padding:6px 6px 6px 18px;min-height:46px;
    transition:border-color .22s ease,box-shadow .22s ease;
  }
  .search-form:focus-within{border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18);}
  .search-form i{color:var(--steel-600);font-size:14px;}
  .search-input{
    flex:1 1 auto;border:0;background:transparent;outline:none;
    font-size:14px;color:var(--ink-900);min-width:0;
  }
  .search-input::placeholder{color:#98A0AA;}
  .search-btn{
    flex:none;border:0;cursor:pointer;border-radius:999px;
    background:var(--grad-volt);color:#14171B;font-weight:700;font-size:13px;
    padding:9px 18px;min-height:34px;transition:filter .2s ease,transform .2s ease;
  }
  .search-btn:hover{filter:brightness(1.05);transform:translateY(-1px);}
  .search-btn:active{transform:translateY(0) scale(.99);}

  .nav-links{display:flex;align-items:center;gap:6px;flex:none;margin-left:auto;}
  .nav-link{
    display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:12px;
    font-size:14px;color:var(--steel-600);font-weight:500;
    transition:color .2s ease,background .2s ease;
  }
  .nav-link:hover{color:var(--volt-600);background:rgba(245,166,35,.09);text-decoration:underline;text-underline-offset:4px;}
  .nav-link.is-active{color:var(--ink-900);font-weight:700;background:rgba(245,166,35,.14);}

  .mobile-toggle{
    display:none;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
    background:#fff;color:var(--ink-900);cursor:pointer;flex:none;
  }
  .mobile-toggle:hover{border-color:rgba(245,166,35,.45);}

  .mobile-drawer{
    display:none;border-top:1px solid var(--line);background:#fff;
    padding:16px 0 20px;
  }
  .mobile-drawer.is-open{display:block;}
  .mobile-drawer .drawer-search{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:999px;padding:6px 6px 6px 16px;background:var(--paper);}
  .mobile-drawer .drawer-search input{flex:1;border:0;background:transparent;outline:none;font-size:14px;min-width:0;}
  .drawer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:14px;}
  .drawer-links a{
    display:flex;align-items:center;min-height:44px;padding:0 14px;border-radius:12px;
    background:var(--paper);border:1px solid var(--line);font-size:14px;color:var(--ink-900);
  }
  .drawer-links a:hover{border-color:rgba(245,166,35,.45);color:var(--volt-600);}

  @media (max-width:1023px){
    .nav-links{display:none;}
    .mobile-toggle{display:inline-flex;}
    .header-inner{min-height:64px;gap:12px;}
    .brand-text small{display:none;}
    .search-form{max-width:none;}
  }
  @media (max-width:639px){
    .search-form{padding:5px 5px 5px 14px;min-height:42px;}
    .search-btn{padding:8px 14px;font-size:12px;}
    .brand-text strong{font-size:14px;}
  }

  /* ---------- 分类导航条 ---------- */
  .cat-bar{background:#fff;border-bottom:1px solid var(--line);}
  .cat-scroller{
    display:flex;align-items:center;gap:8px;min-height:48px;
    overflow-x:auto;overflow-y:hidden;scrollbar-width:none;white-space:nowrap;
  }
  .cat-scroller::-webkit-scrollbar{display:none;}
  .cat-chip{
    display:inline-flex;align-items:center;gap:7px;flex:none;
    min-height:34px;padding:0 14px;border-radius:999px;
    font-size:13.5px;color:var(--steel-600);font-weight:500;
    border:1px solid var(--line);background:var(--paper);
    transition:all .2s ease;
  }
  .cat-chip:hover{color:var(--volt-600);border-color:rgba(245,166,35,.5);background:#fff;}
  .cat-chip.is-active{background:var(--volt-soft);border-color:rgba(245,166,35,.6);color:#8A5300;font-weight:700;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 22px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
    transition:filter .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease,background .2s ease;
  }
  .btn:active{transform:translateY(0) scale(.99);}
  .btn-primary{background:var(--grad-volt);color:#14171B;box-shadow:0 12px 26px -18px rgba(224,138,11,.9);}
  .btn-primary:hover{filter:brightness(1.05);transform:translateY(-1px);}
  .btn-ghost{background:#fff;border-color:rgba(20,23,27,.14);color:var(--ink-900);}
  .btn-ghost:hover{border-color:rgba(245,166,35,.6);color:var(--volt-600);transform:translateY(-1px);}
  .btn-dark{background:var(--ink-900);color:#fff;}
  .btn-dark:hover{filter:brightness(1.1);transform:translateY(-1px);}
  .btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.28);color:#fff;}
  .btn-ghost-light:hover{border-color:var(--volt);color:var(--volt);transform:translateY(-1px);}
  .btn-sm{min-height:40px;padding:0 16px;font-size:14px;border-radius:12px;}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{padding:18px 0 0;font-size:12.5px;color:var(--steel-600);}
  .breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
  .breadcrumb li{display:flex;align-items:center;gap:8px;}
  .breadcrumb li::after{content:"/";color:var(--silver-300);}
  .breadcrumb li:last-child::after{content:"";}
  .breadcrumb a{color:var(--steel-600);transition:color .2s ease;}
  .breadcrumb a:hover{color:var(--volt-600);text-decoration:underline;text-underline-offset:3px;}
  .breadcrumb .current{color:var(--ink-900);font-weight:600;}

  /* ---------- 通用区块 ---------- */
  .section{padding:56px 0;}
  @media (min-width:1024px){ .section{padding:88px 0;} }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:700;letter-spacing:.06em;
    color:#8A5300;background:var(--volt-soft);
    border-radius:999px;padding:5px 13px;
  }
  .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px;}
  .h2{font-size:clamp(24px,2.6vw,36px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
  .lead{color:var(--steel-600);font-size:15px;max-width:720px;margin-top:8px;}
  .link-arrow{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--volt-600);min-height:44px;}
  .link-arrow i{transition:transform .2s ease;}
  .link-arrow:hover{text-decoration:underline;text-underline-offset:4px;}
  .link-arrow:hover i{transform:translateX(3px);}

  /* ---------- Hero 主区 ---------- */
  .hero-wrap{padding:28px 0 8px;}
  .hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start;}
  @media (max-width:1023px){ .hero-grid{grid-template-columns:1fr;gap:24px;} }

  .hero-media{
    position:relative;border-radius:var(--radius-big);overflow:hidden;
    background:var(--ink-800);box-shadow:var(--shadow-card);
    min-height:340px;
  }
  .hero-media img{width:100%;height:100%;min-height:340px;object-fit:cover;transition:transform .6s ease;}
  .hero-media:hover img{transform:scale(1.03);}
  .hero-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(20,23,27,0) 42%,rgba(20,23,27,.55) 100%);
    pointer-events:none;
  }
  .float-badge{
    position:absolute;left:20px;bottom:20px;z-index:2;
    background:#fff;border-radius:16px;padding:12px 16px;box-shadow:var(--shadow-float);
    display:flex;align-items:center;gap:12px;
  }
  .float-badge .fb-num{font-size:22px;font-weight:800;line-height:1;}
  .float-badge .fb-label{font-size:12px;color:var(--steel-600);line-height:1.4;}
  .float-badge.tag-right{left:auto;right:20px;bottom:auto;top:20px;}

  .hero-body h1{
    font-size:clamp(28px,3.4vw,42px);line-height:1.2;font-weight:800;letter-spacing:-.01em;
    margin:14px 0 14px;
  }
  .hero-body p.intro{color:var(--steel-600);font-size:15.5px;line-height:1.9;}
  .stat-row{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 6px;}
  .stat-badge{
    background:#fff;border:1px solid var(--line);border-radius:16px;
    padding:12px 16px;min-width:120px;box-shadow:var(--shadow-card);
  }
  .stat-badge .s-num{font-size:21px;font-weight:800;line-height:1.1;letter-spacing:-.02em;}
  .stat-badge .s-label{font-size:12px;color:var(--steel-600);margin-top:3px;}
  .point-list{margin:20px 0 24px;display:grid;gap:10px;}
  .point-list li{display:flex;gap:10px;font-size:14.5px;color:var(--steel-700);line-height:1.7;}
  .point-list i{color:var(--volt-600);margin-top:5px;font-size:12px;flex:none;}
  .cta-row{display:flex;flex-wrap:wrap;gap:12px;}
  .fine-print{font-size:12.5px;color:var(--steel-600);margin-top:14px;display:flex;align-items:center;gap:8px;}
  .fine-print i{color:var(--volt-600);}

  /* ---------- 规格表 ---------- */
  .spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
  @media (max-width:860px){ .spec-grid{grid-template-columns:1fr;} }
  .spec-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);overflow:hidden;transition:box-shadow .3s ease,border-color .3s ease;
  }
  .spec-card:hover{box-shadow:var(--shadow-card-hover);border-color:rgba(245,166,35,.35);}
  .spec-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 22px;border-bottom:1px solid var(--line);}
  .spec-card-head h3{font-size:17px;font-weight:700;display:flex;align-items:center;gap:9px;}
  .spec-card-head h3 i{color:var(--volt-600);font-size:14px;}
  .spec-card-head span{font-size:12px;color:var(--steel-600);}
  .spec-table{width:100%;border-collapse:collapse;font-size:14px;}
  .spec-table th,.spec-table td{padding:0 22px;height:46px;text-align:left;vertical-align:middle;border-bottom:1px solid var(--line);}
  .spec-table thead th{background:var(--sand);font-size:12.5px;font-weight:700;color:var(--steel-700);letter-spacing:.02em;height:42px;}
  .spec-table tbody tr:last-child th,.spec-table tbody tr:last-child td{border-bottom:0;}
  .spec-table tbody th{font-weight:600;color:var(--ink-900);width:38%;}
  .spec-table td{color:var(--steel-600);}
  .spec-note{padding:14px 22px;background:var(--sand);font-size:12.5px;color:#7A6122;display:flex;gap:9px;align-items:flex-start;line-height:1.7;}
  .spec-note i{margin-top:4px;color:var(--volt-600);}

  /* ---------- 场景卡 ---------- */
  .scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
  @media (max-width:960px){ .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));} }
  @media (max-width:639px){ .scene-grid{grid-template-columns:1fr;} }
  .scene-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
    box-shadow:var(--shadow-card);display:flex;flex-direction:column;
    transition:box-shadow .3s ease,border-color .3s ease,transform .3s ease;
  }
  .scene-card:hover{box-shadow:var(--shadow-card-hover);border-color:rgba(245,166,35,.45);transform:translateY(-3px);}
  .scene-thumb{position:relative;overflow:hidden;aspect-ratio:16/10;}
  .scene-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
  .scene-card:hover .scene-thumb img{transform:scale(1.04);}
  .thumb-tag{
    position:absolute;left:14px;top:14px;z-index:2;
    background:rgba(20,23,27,.82);color:#fff;font-size:11.5px;font-weight:600;
    border-radius:999px;padding:4px 11px;backdrop-filter:blur(4px);
  }
  .scene-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:9px;flex:1;}
  .scene-body h3{font-size:17.5px;font-weight:700;line-height:1.5;}
  .scene-body p{font-size:14px;color:var(--steel-600);line-height:1.8;}
  .scene-meta{
    margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    font-size:12.5px;color:var(--steel-600);
  }
  .scene-meta .link-arrow{min-height:36px;font-size:13px;}

  /* ---------- 流程条 ---------- */
  .flow-band{background:var(--grad-dark);border-radius:var(--radius-big);padding:44px 32px;color:#fff;position:relative;overflow:hidden;}
  @media (max-width:639px){ .flow-band{padding:32px 20px;} }
  .flow-band::before{
    content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
    background:radial-gradient(circle,rgba(245,166,35,.28),rgba(245,166,35,0) 70%);
    pointer-events:none;
  }
  .flow-band h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3;position:relative;}
  .flow-band p.sub{color:rgba(255,255,255,.66);font-size:14.5px;margin-top:8px;max-width:640px;position:relative;}
  .flow-steps{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:34px;}
  @media (max-width:900px){ .flow-steps{grid-template-columns:repeat(2,minmax(0,1fr));} }
  @media (max-width:520px){ .flow-steps{grid-template-columns:1fr;} }
  .flow-step{
    position:relative;background:rgba(255,255,255,.05);border:1px solid var(--line-dark);
    border-radius:18px;padding:20px 18px;
  }
  .flow-step .step-num{
    width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
    background:var(--grad-volt);color:#14171B;font-weight:800;font-size:14px;margin-bottom:12px;
  }
  .flow-step h3{font-size:15.5px;font-weight:700;color:#fff;}
  .flow-step p{font-size:13px;color:rgba(255,255,255,.62);line-height:1.75;margin-top:6px;}

  /* ---------- FAQ ---------- */
  .faq-list{display:grid;gap:12px;max-width:940px;}
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:18px;
    box-shadow:var(--shadow-card);overflow:hidden;transition:background .25s ease,border-color .25s ease;
  }
  .faq-item[open]{background:var(--sand);border-color:rgba(245,166,35,.4);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px;font-size:16px;font-weight:600;min-height:44px;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary .faq-icon{
    width:28px;height:28px;border-radius:50%;flex:none;
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--volt-soft);color:#8A5300;font-size:12px;
    transition:transform .3s ease;
  }
  .faq-item[open] summary .faq-icon{transform:rotate(45deg);}
  .faq-item .faq-answer{padding:0 20px 20px;font-size:15px;line-height:1.9;color:var(--steel-700);}
  .faq-item summary:hover{color:var(--volt-600);}

  /* ---------- CTA ---------- */
  .cta-band{
    background:var(--grad-dark);border-radius:var(--radius-big);
    padding:44px 36px;color:#fff;display:grid;grid-template-columns:1.05fr .95fr;gap:36px;
    align-items:center;box-shadow:var(--shadow-card-hover);position:relative;overflow:hidden;
  }
  @media (max-width:900px){ .cta-band{grid-template-columns:1fr;padding:34px 24px;gap:26px;} }
  .cta-band::before{
    content:"";position:absolute;left:-120px;bottom:-140px;width:320px;height:320px;border-radius:50%;
    background:radial-gradient(circle,rgba(245,166,35,.22),rgba(245,166,35,0) 70%);pointer-events:none;
  }
  .cta-band h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.3;position:relative;}
  .cta-band p{color:rgba(255,255,255,.68);font-size:14.5px;margin-top:10px;line-height:1.85;position:relative;}
  .cta-tel{display:inline-flex;align-items:center;gap:10px;margin-top:20px;font-size:15px;font-weight:600;color:var(--volt);position:relative;}
  .cta-tel i{font-size:14px;}
  .cta-form{position:relative;display:grid;gap:12px;background:rgba(255,255,255,.06);border:1px solid var(--line-dark);border-radius:20px;padding:22px;}
  .cta-form label{font-size:12.5px;color:rgba(255,255,255,.72);display:block;margin-bottom:6px;}
  .cta-form input,.cta-form textarea{
    width:100%;border-radius:12px;border:1px solid rgba(255,255,255,.16);
    background:rgba(255,255,255,.06);color:#fff;font-size:14px;padding:12px 14px;
    min-height:48px;outline:none;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .cta-form textarea{min-height:84px;resize:vertical;line-height:1.7;}
  .cta-form input::placeholder,.cta-form textarea::placeholder{color:rgba(255,255,255,.38);}
  .cta-form input:focus,.cta-form textarea:focus{border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18);}
  .cta-form .form-tip{font-size:12px;color:rgba(255,255,255,.5);display:flex;align-items:center;gap:7px;}
  .cta-form .btn{width:100%;}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:64px;}
  .footer-main{padding:56px 0 0;}
  .footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.15fr;gap:40px;}
  @media (max-width:1023px){ .footer-grid{grid-template-columns:1fr 1fr;gap:32px;} }
  @media (max-width:599px){ .footer-grid{grid-template-columns:1fr;gap:28px;} }
  .footer-brand{display:flex;align-items:center;gap:10px;}
  .footer-brand .brand-mark{background:rgba(255,255,255,.08);}
  .footer-brand .brand-text strong{color:#fff;}
  .footer-brand .brand-text small{color:rgba(255,255,255,.5);}
  .footer-intro{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.58);margin-top:16px;max-width:340px;}
  .footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.02em;}
  .footer-links{display:flex;flex-direction:column;}
  .footer-links a{
    display:inline-flex;align-items:center;min-height:36px;font-size:13.5px;
    color:rgba(255,255,255,.62);line-height:2.1;transition:color .2s ease;
  }
  .footer-links a:hover{color:var(--volt);text-decoration:underline;text-underline-offset:4px;}
  .footer-contact{display:grid;gap:10px;font-size:13.5px;}
  .footer-contact li{display:flex;align-items:flex-start;gap:10px;color:rgba(255,255,255,.62);line-height:1.7;}
  .footer-contact i{color:var(--volt);margin-top:5px;font-size:13px;flex:none;}
  .footer-bottom{
    margin-top:44px;border-top:1px solid var(--line-dark);
    padding:18px 0 26px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
    font-size:12.5px;color:rgba(255,255,255,.46);
  }
  .footer-bottom a{color:rgba(255,255,255,.66);}
  .footer-bottom a:hover{color:var(--volt);}

  /* ---------- 分区小标题 ---------- */
  .block-title{font-size:19px;font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:6px;}
  .block-title::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--volt);display:inline-block;}

/* roulang page: article */
:root{
  --ink-900:#14171B;
  --ink-800:#1E232A;
  --steel-600:#5B6470;
  --steel-500:#6E7783;
  --silver-300:#C6CBD2;
  --paper:#F7F8F9;
  --sand:#FBF6EC;
  --volt:#F5A623;
  --volt-600:#E08A0B;
  --volt-soft:#FFE9C2;
  --line:rgba(20,23,27,.08);
  --line-dark:rgba(255,255,255,.10);
  --shadow-card:0 18px 40px -28px rgba(20,23,27,.35);
  --shadow-hover:0 28px 56px -28px rgba(20,23,27,.45);
  --shadow-float:0 10px 24px -12px rgba(20,23,27,.30);
  --radius-card:22px;
  --radius-lg:28px;
  --radius-btn:14px;
  --radius-input:12px;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter",ui-sans-serif,system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-900);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease,transform .2s ease;}
a:hover{color:var(--volt-600);}
button,input,textarea{font:inherit;}
button{cursor:pointer;background:none;border:0;padding:0;color:inherit;}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;}
::selection{background:var(--volt-soft);color:var(--ink-900);}
.container{
  width:100%;
  max-width:1240px!important;
  margin-left:auto!important;
  margin-right:auto!important;
  padding-left:20px!important;
  padding-right:20px!important;
}
@media (min-width:1024px){
  .container{padding-left:32px!important;padding-right:32px!important;}
}
.top-bar{
  height:38px;
  display:flex;
  align-items:center;
  background:var(--ink-900);
  color:rgba(255,255,255,.76);
  font-size:12.5px;
}
.top-bar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.top-note,.top-actions{display:flex;align-items:center;gap:8px;white-space:nowrap;}
.top-note i,.top-actions i{color:var(--volt);font-size:12px;}
.top-actions{gap:22px;}
.top-region{padding-left:18px;border-left:1px solid rgba(255,255,255,.16);}
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,248,249,.93);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  min-height:72px;
  display:flex;
  align-items:center;
  gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;
  height:36px;
  border-radius:12px;
  display:grid;
  place-items:center;
  color:#fff;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);
  box-shadow:0 12px 24px -16px rgba(224,138,11,.8);
  flex:0 0 auto;
}
.brand-mark svg{width:22px;height:22px;display:block;}
.brand-text{display:flex;flex-direction:column;line-height:1.16;min-width:0;}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900);}
.brand-text small{font-size:11px;color:var(--steel-600);letter-spacing:.03em;margin-top:3px;}
.nav-search{
  flex:1;
  max-width:520px;
  min-width:240px;
  height:46px;
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 6px 0 16px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow:0 8px 24px -22px rgba(20,23,27,.35);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18);}
.nav-search > i{color:var(--steel-600);font-size:14px;}
.nav-search input{
  flex:1;
  min-width:0;
  border:0;
  outline:0;
  background:transparent;
  color:var(--ink-900);
  font-size:14px;
  height:100%;
}
.nav-search input::placeholder{color:#9AA1AA;}
.nav-search button{
  height:34px;
  padding:0 16px;
  border-radius:999px;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);
  color:#fff;
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:filter .2s ease,transform .2s ease;
}
.nav-search button:hover{filter:brightness(1.05);transform:translateY(-1px);}
.nav-links{display:flex;align-items:center;gap:20px;margin-left:auto;}
.nav-link{
  position:relative;
  padding:8px 0;
  font-size:14px;
  font-weight:500;
  color:var(--steel-600);
  white-space:nowrap;
}
.nav-link:hover{color:var(--ink-900);}
.nav-link.is-active{color:var(--ink-900);font-weight:700;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  border-radius:999px;
  background:var(--volt);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 20px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-weight:700;
  font-size:14px;
  line-height:1;
  white-space:nowrap;
  transition:filter .2s ease,transform .2s ease,background .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#FFC24A,#F08A0A);
  color:#fff;
  box-shadow:0 12px 24px -14px rgba(224,138,11,.65);
}
.btn-primary:hover{color:#fff;filter:brightness(1.05);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0) scale(.99);}
.btn-outline{
  background:transparent;
  border-color:rgba(20,23,27,.14);
  color:var(--ink-900);
}
.btn-outline:hover{background:var(--volt-soft);border-color:rgba(245,166,35,.55);color:var(--volt-600);}
.btn-sm{min-height:40px;padding:0 16px;font-size:13px;border-radius:12px;}
.btn-block{width:100%;}
.menu-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink-900);
  align-items:center;
  justify-content:center;
  font-size:18px;
  margin-left:auto;
}
.menu-toggle:hover{background:var(--volt-soft);color:var(--volt-600);}
.mobile-drawer{
  display:none;
  position:absolute;
  left:0;
  right:0;
  top:100%;
  padding:16px 20px 22px;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:0 24px 40px -28px rgba(20,23,27,.45);
  max-height:calc(100vh - 64px);
  overflow:auto;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer .nav-search{display:flex;max-width:none;width:100%;margin:0 0 14px;box-shadow:none;}
.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
.drawer-links a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:10px 12px;
  border-radius:10px;
  background:var(--paper);
  border:1px solid var(--line);
  font-size:14px;
  color:var(--steel-600);
}
.drawer-links a:hover{background:var(--volt-soft);color:var(--ink-900);border-color:rgba(245,166,35,.3);}
.drawer-links .btn{grid-column:1 / -1;color:#fff;border:0;}
.category-strip{background:rgba(255,255,255,.72);border-bottom:1px solid var(--line);}
.category-strip-inner{
  display:flex;
  align-items:center;
  gap:8px;
  height:48px;
  overflow-x:auto;
  scrollbar-width:none;
}
.category-strip-inner::-webkit-scrollbar{display:none;}
.category-strip a{
  white-space:nowrap;
  padding:7px 14px;
  border-radius:999px;
  color:var(--steel-600);
  font-size:13.5px;
  line-height:1.4;
  border:1px solid transparent;
}
.category-strip a:hover{background:var(--volt-soft);color:var(--ink-900);}
.category-strip a.is-current{background:var(--volt-soft);border-color:rgba(245,166,35,.28);color:#7A4A00;font-weight:700;}
.breadcrumb-wrap{padding-top:24px;}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:12.5px;
  color:var(--steel-600);
}
.breadcrumb a{color:var(--steel-600);}
.breadcrumb a:hover{color:var(--volt-600);text-decoration:underline;text-underline-offset:3px;}
.breadcrumb span:last-child{color:var(--ink-900);font-weight:600;}
.article-layout{
  max-width:1100px;
  margin:0 auto;
  padding-top:28px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 240px;
  gap:48px;
  align-items:start;
}
.article-main{min-width:0;}
.mobile-toc{
  display:none;
  margin-bottom:22px;
  padding:0 16px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
}
.mobile-toc summary{
  list-style:none;
  padding:14px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:14px;
  font-weight:700;
  cursor:pointer;
}
.mobile-toc summary::-webkit-details-marker{display:none;}
.mobile-toc summary::after{
  content:"+";
  color:var(--volt-600);
  font-size:20px;
  line-height:1;
  transition:transform .2s ease;
}
.mobile-toc[open] summary::after{transform:rotate(45deg);}
.mobile-toc nav{padding:2px 0 14px;display:flex;flex-direction:column;gap:4px;}
.mobile-toc nav a{
  padding:7px 10px;
  border-radius:8px;
  color:var(--steel-600);
  font-size:13px;
  border-left:2px solid transparent;
}
.mobile-toc nav a:hover{background:var(--paper);color:var(--ink-900);}
.mobile-toc nav a.toc-level-3{padding-left:22px;font-size:12.5px;}
.article-hero{
  padding:10px 0 30px;
  margin-bottom:34px;
  border-bottom:1px solid var(--line);
}
.category-pill{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  padding:4px 12px;
  border-radius:999px;
  background:var(--volt-soft);
  border:1px solid rgba(245,166,35,.28);
  color:#7A4A00;
  font-size:12.5px;
  font-weight:700;
}
.article-hero h1{
  margin:16px 0 18px;
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--ink-900);
  overflow-wrap:anywhere;
}
.meta-row{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 22px;
  font-size:13px;
  color:var(--steel-600);
}
.meta-row > span,.meta-share{display:inline-flex;align-items:center;gap:7px;}
.meta-row i{font-size:12.5px;color:var(--steel-500);}
.meta-share{
  min-height:32px;
  color:var(--steel-600);
  font-size:13px;
  transition:color .2s ease;
}
.meta-share:hover{color:var(--volt-600);}
.article-content{
  max-width:800px;
  color:#2C333C;
  font-size:16px;
  line-height:1.95;
  overflow-wrap:break-word;
}
.article-content p{margin:0 0 1.2em;}
.article-content h2{
  margin:2em 0 .8em;
  padding-left:12px;
  border-left:4px solid var(--volt);
  color:var(--ink-900);
  font-size:24px;
  line-height:1.4;
  font-weight:700;
  letter-spacing:-.01em;
}
.article-content h3{
  margin:1.6em 0 .6em;
  color:var(--ink-900);
  font-size:19px;
  line-height:1.5;
  font-weight:700;
}
.article-content h4{
  margin:1.4em 0 .5em;
  color:var(--ink-900);
  font-size:17px;
  line-height:1.5;
  font-weight:700;
}
.article-content ul,.article-content ol{margin:0 0 1.2em;padding-left:1.5em;}
.article-content li{margin:.4em 0;}
.article-content blockquote{
  margin:1.6em 0;
  padding:18px 20px;
  background:var(--sand);
  border-left:3px solid var(--volt);
  border-radius:0 14px 14px 0;
  color:#4A515C;
  font-style:normal;
}
.article-content img{
  width:auto;
  max-width:100%;
  height:auto;
  margin:1.5em auto;
  border-radius:16px;
  box-shadow:var(--shadow-card);
}
.article-content figure{margin:1.6em 0;}
.article-content figcaption{
  margin-top:8px;
  text-align:center;
  font-size:13px;
  color:var(--steel-600);
}
.article-content table{
  width:100%;
  margin:1.5em 0;
  border-collapse:separate;
  border-spacing:0;
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  font-size:14.5px;
}
.article-content th{
  background:#F1F3F5;
  color:var(--ink-900);
  text-align:left;
  font-weight:700;
}
.article-content th,.article-content td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
}
.article-content tr:last-child td{border-bottom:0;}
.article-content pre{
  margin:1.5em 0;
  padding:18px;
  border-radius:12px;
  background:var(--ink-900);
  color:#EDF0F3;
  overflow:auto;
  font-size:14px;
  line-height:1.75;
}
.article-content code{
  padding:.15em .4em;
  border-radius:6px;
  background:#EEF1F4;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;
}
.article-content pre code{padding:0;background:transparent;color:inherit;}
.article-content a{
  color:var(--volt-600);
  text-decoration:underline;
  text-underline-offset:3px;
}
.article-content a:hover{color:#B86A00;}
.empty-article{
  margin:20px 0;
  padding:44px 24px;
  text-align:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
}
.empty-article i{
  display:block;
  margin-bottom:12px;
  color:var(--volt-600);
  font-size:30px;
}
.empty-article h2{
  margin:0 0 18px;
  padding:0;
  border:0;
  font-size:22px;
  line-height:1.4;
}
.article-tags{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-top:40px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.tag-label{font-size:13px;font-weight:600;color:var(--steel-600);}
.tag{
  display:inline-flex;
  align-items:center;
  min-height:32px;
  padding:5px 13px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--line);
  color:var(--steel-600);
  font-size:12.5px;
  line-height:1.4;
}
.tag:hover{background:var(--volt-soft);border-color:rgba(245,166,35,.35);color:#7A4A00;}
.article-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.article-aside{
  position:sticky;
  top:96px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.toc-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  padding:20px;
  box-shadow:var(--shadow-card);
}
.toc-card h2{
  margin:0 0 12px;
  font-size:14px;
  line-height:1.4;
  font-weight:700;
  color:var(--ink-900);
}
#tocNav{
  display:flex;
  flex-direction:column;
  gap:2px;
  max-height:330px;
  overflow:auto;
  scrollbar-width:thin;
}
#tocNav a{
  display:block;
  padding:7px 10px;
  border-left:2px solid transparent;
  border-radius:8px;
  color:var(--steel-600);
  font-size:13px;
  line-height:1.45;
}
#tocNav a:hover{background:var(--paper);color:var(--ink-900);}
#tocNav a.is-active{border-left-color:var(--volt);background:var(--volt-soft);color:#7A4A00;font-weight:600;}
#tocNav a.toc-level-3{padding-left:22px;font-size:12.5px;}
.toc-empty{display:block;color:var(--steel-500);font-size:12.5px;line-height:1.7;}
.aside-help-card{
  position:relative;
  overflow:hidden;
  padding:22px;
  border-radius:20px;
  background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
  color:#fff;
  box-shadow:var(--shadow-card);
}
.aside-help-card::after{
  content:"";
  position:absolute;
  width:140px;
  height:140px;
  right:-60px;
  bottom:-70px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(245,166,35,.25),rgba(245,166,35,0));
  pointer-events:none;
}
.aside-kicker{display:inline-block;margin-bottom:10px;font-size:11.5px;font-weight:700;letter-spacing:.12em;color:#FFC24A;}
.aside-help-card h3{margin:0 0 10px;font-size:17px;line-height:1.45;font-weight:700;color:#fff;}
.aside-help-card p{position:relative;margin:0 0 16px;color:rgba(255,255,255,.68);font-size:13px;line-height:1.8;}
.aside-help-card .btn{position:relative;width:100%;border-color:rgba(255,255,255,.24);color:#fff;}
.aside-help-card .btn:hover{background:rgba(255,255,255,.08);border-color:rgba(245,166,35,.6);color:#FFC24A;}
.related-section{padding-top:72px;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:28px;
}
.eyebrow{
  display:inline-block;
  margin-bottom:8px;
  color:var(--volt-600);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
}
.section-head h2{
  margin:0;
  color:var(--ink-900);
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:-.02em;
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--steel-600);
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
}
.text-link:hover{color:var(--volt-600);text-decoration:underline;text-underline-offset:3px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.post-card{
  display:flex;
  gap:14px;
  padding:14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-card:hover{
  transform:translateY(-3px);
  border-color:rgba(245,166,35,.45);
  box-shadow:var(--shadow-hover);
  color:inherit;
}
.post-thumb{
  flex:0 0 92px;
  width:92px;
  height:92px;
  overflow:hidden;
  border-radius:12px;
  background:#E9ECEF;
}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-thumb img{transform:scale(1.06);}
.post-body{min-width:0;display:flex;flex-direction:column;gap:4px;}
.post-meta{display:flex;align-items:center;flex-wrap:wrap;gap:7px;font-size:11.5px;color:var(--steel-600);}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--silver-300);}
.post-title{
  margin:0;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  color:var(--ink-900);
  font-size:15px;
  line-height:1.45;
  font-weight:700;
}
.post-desc{
  margin:0;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  color:var(--steel-600);
  font-size:12.5px;
  line-height:1.6;
}
.post-arrow{margin-left:auto;align-self:flex-end;color:var(--volt-600);font-size:12px;}
.article-faq{padding-top:72px;}
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  padding:0 20px;
  transition:background .2s ease,border-color .2s ease;
}
.faq-item[open]{background:var(--sand);border-color:rgba(245,166,35,.28);}
.faq-item summary{
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  min-height:62px;
  padding:16px 0;
  color:var(--ink-900);
  font-size:15.5px;
  line-height:1.5;
  font-weight:600;
  cursor:pointer;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  color:var(--volt-600);
  font-size:20px;
  line-height:1;
  transition:transform .2s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item p{
  margin:0;
  padding:0 0 18px;
  color:#4A515C;
  font-size:14.5px;
  line-height:1.9;
}
.contact-cta{padding-top:72px;}
.cta-inner{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:1.08fr .92fr;
  gap:48px;
  align-items:center;
  padding:48px;
  border-radius:var(--radius-lg);
  color:#fff;
  background:
    linear-gradient(135deg,rgba(30,35,42,.97) 0%,rgba(58,66,76,.93) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  box-shadow:var(--shadow-hover);
}
.cta-inner::before{
  content:"";
  position:absolute;
  width:360px;
  height:360px;
  right:-140px;
  top:-170px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(245,166,35,.28),rgba(245,166,35,0) 68%);
  pointer-events:none;
}
.cta-copy{position:relative;}
.cta-copy .eyebrow{color:#FFC24A;}
.cta-copy h2{
  margin:0 0 14px;
  color:#fff;
  font-size:clamp(26px,3vw,36px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:-.02em;
}
.cta-copy p{margin:0;color:rgba(255,255,255,.72);font-size:14.5px;line-height:1.9;max-width:520px;}
.cta-points{
  list-style:none;
  margin:20px 0 0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:10px 18px;
  color:rgba(255,255,255,.72);
  font-size:13px;
}
.cta-points li{display:flex;align-items:center;gap:7px;}
.cta-points i{color:#FFC24A;font-size:12px;}
.cta-form{position:relative;display:grid;gap:12px;}
.cta-form label{display:flex;flex-direction:column;gap:6px;color:rgba(255,255,255,.72);font-size:12.5px;font-weight:500;}
.cta-form input,.cta-form textarea{
  width:100%;
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-input);
  background:rgba(255,255,255,.08);
  color:#fff;
  outline:0;
  padding:0 14px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cta-form input{height:46px;}
.cta-form textarea{min-height:96px;padding-top:12px;padding-bottom:12px;resize:vertical;line-height:1.6;}
.cta-form input::placeholder,.cta-form textarea::placeholder{color:rgba(255,255,255,.42);}
.cta-form input:focus,.cta-form textarea:focus{
  border-color:var(--volt);
  background:rgba(255,255,255,.11);
  box-shadow:0 0 0 3px rgba(245,166,35,.18);
}
.cta-form .btn{width:100%;margin-top:2px;}
.form-note{margin:0;color:rgba(255,255,255,.52);font-size:12px;line-height:1.7;}
.site-footer{
  margin-top:88px;
  padding-top:64px;
  background:var(--ink-900);
  color:rgba(255,255,255,.72);
}
.footer-main{padding-bottom:24px;}
.footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:36px;height:36px;}
.footer-brand .brand-text strong{color:#fff;font-size:17px;}
.footer-brand .brand-text small{color:rgba(255,255,255,.46);}
.footer-intro{max-width:340px;margin:0;color:rgba(255,255,255,.6);font-size:13.5px;line-height:1.9;}
.footer-title{margin:0 0 16px;color:#fff;font-size:14px;line-height:1.4;font-weight:700;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:13.5px;}
.footer-links a{color:rgba(255,255,255,.6);line-height:1.7;}
.footer-links a:hover{color:var(--volt);text-decoration:underline;text-underline-offset:3px;}
.footer-contact{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px;color:rgba(255,255,255,.6);font-size:13px;}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;line-height:1.6;}
.footer-contact i{width:16px;margin-top:4px;color:var(--volt);font-size:13px;flex:0 0 auto;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 0 28px;
  border-top:1px solid var(--line-dark);
  color:rgba(255,255,255,.45);
  font-size:12.5px;
}
.footer-bottom a{color:rgba(255,255,255,.6);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom a:hover{color:var(--volt);}
@media (max-width:1023px){
  .header-inner > .nav-search{display:none;}
  .header-inner .nav-links{display:none;}
  .menu-toggle{display:inline-flex;}
  .article-layout{grid-template-columns:1fr;gap:0;max-width:900px;}
  .article-aside{display:none;}
  .mobile-toc{display:block;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .cta-inner{grid-template-columns:1fr;padding:36px;}
  .cta-copy p{max-width:none;}
}
@media (max-width:767px){
  .top-actions{display:none;}
  .top-bar{height:36px;font-size:12px;}
  .top-note{white-space:normal;}
  .header-inner{min-height:64px;gap:12px;}
  .brand-text strong{font-size:15px;}
  .brand-text small{display:none;}
  .category-strip-inner{height:44px;}
  .breadcrumb-wrap{padding-top:18px;}
  .article-layout{padding-top:20px;}
  .article-hero{padding-top:4px;margin-bottom:26px;}
  .article-hero h1{font-size:clamp(26px,7vw,34px);}
  .meta-row{gap:8px 16px;font-size:12.5px;}
  .article-content{font-size:15.5px;line-height:1.9;}
  .article-content h2{font-size:21px;}
  .article-content h3{font-size:18px;}
  .related-grid{grid-template-columns:1fr;}
  .faq-grid{grid-template-columns:1fr;}
  .section-head{align-items:flex-start;flex-direction:column;gap:10px;margin-bottom:20px;}
  .related-section,.article-faq,.contact-cta{padding-top:56px;}
  .cta-inner{padding:28px 20px;border-radius:22px;gap:28px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .site-footer{margin-top:68px;padding-top:48px;}
  .post-card{gap:12px;}
  .post-thumb{flex-basis:82px;width:82px;height:82px;}
}
@media (max-width:520px){
  .container{padding-left:18px!important;padding-right:18px!important;}
  .brand-mark{width:32px;height:32px;border-radius:10px;}
  .brand-mark svg{width:19px;height:19px;}
  .brand-text strong{font-size:14px;}
  .drawer-links{grid-template-columns:1fr;}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap;}
  .article-content img{border-radius:13px;}
  .post-card{padding:12px;}
  .post-thumb{flex-basis:74px;width:74px;height:74px;}
  .post-title{font-size:14px;}
  .post-desc{font-size:12px;}
  .cta-copy h2{font-size:24px;}
  .footer-bottom{font-size:12px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important;}
}

/* roulang page: category3 */
:root{
  --ink-900:#14171B;
  --ink-800:#1E232A;
  --ink-700:#2A313A;
  --steel-600:#5B6470;
  --steel-500:#7A838F;
  --silver-300:#C6CBD2;
  --silver-200:#E4E7EB;
  --paper:#F7F8F9;
  --sand:#FBF6EC;
  --volt:#F5A623;
  --volt-600:#E08A0B;
  --volt-soft:#FFE9C2;
  --radius-card:22px;
  --radius-lg:28px;
  --radius-btn:14px;
  --radius-input:12px;
  --shadow-card:0 18px 40px -28px rgba(20,23,27,.35);
  --shadow-hover:0 28px 56px -28px rgba(20,23,27,.45);
  --line:1px solid rgba(20,23,27,.08);
  --line-dark:1px solid rgba(255,255,255,.10);
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-900);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--volt-600)}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.82);font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px}
.topbar-note{display:inline-flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-note i,.topbar-right i{color:var(--volt)}
.topbar-right{display:flex;align-items:center;gap:16px;white-space:nowrap}
.topbar-right span{display:inline-flex;align-items:center;gap:7px}
.topbar-divider{width:1px;height:12px;background:rgba(255,255,255,.18);display:inline-block}
@media (max-width:767px){.topbar-right{display:none}.topbar-note{font-size:12px}}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(247,248,249,.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:var(--line)}
.nav-inner{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand:hover{text-decoration:none}
.brand-mark{width:36px;height:36px;border-radius:12px;background:linear-gradient(135deg,#FFC24A,#F08A0A);display:grid;place-items:center;color:#1E232A;flex:none}
.brand-mark svg{width:20px;height:20px}
.brand-text strong{display:block;font-size:16px;font-weight:800;letter-spacing:-.01em;line-height:1.2;color:var(--ink-900)}
.brand-text small{display:block;font-size:11px;letter-spacing:.06em;color:var(--steel-500);line-height:1.5}
.nav-search{
  position:relative;display:flex;align-items:center;flex:1 1 auto;
  max-width:460px;min-width:0;height:46px;padding:0 4px 0 16px;background:#fff;
  border:1px solid rgba(20,23,27,.10);border-radius:999px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18)}
.nav-search > i{color:var(--steel-500);font-size:14px;flex:none}
.nav-search input{flex:1;min-width:0;height:100%;border:0;outline:0;background:transparent;padding:0 12px;font-size:14px}
.nav-search input::placeholder{color:#9AA2AC}
.nav-search button{
  flex:none;height:36px;padding:0 16px;border:0;border-radius:999px;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);color:#20160A;
  font-size:13px;font-weight:700;cursor:pointer;
  transition:filter .2s ease,transform .2s ease;
}
.nav-search button:hover{filter:brightness(1.05);transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;flex:none}
.nav-link{display:inline-flex;align-items:center;height:44px;padding:0 14px;border-radius:12px;font-size:15px;font-weight:600;color:var(--steel-600);transition:background .2s ease,color .2s ease}
.nav-link:hover{background:rgba(20,23,27,.05);color:var(--ink-900);text-decoration:none}
.nav-link.is-active{color:#7A4A00;background:var(--volt-soft)}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;border:1px solid rgba(20,23,27,.12);background:#fff;color:var(--ink-900);cursor:pointer;flex:none}
.nav-toggle:hover{border-color:rgba(245,166,35,.55)}
@media (max-width:1180px){.nav-search{max-width:360px}}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav-search{max-width:none;margin-left:auto}
}
@media (max-width:767px){
  .nav-search{display:none}
  .nav-inner{min-height:64px;gap:12px}
  .brand-text small{display:none}
  .brand-text strong{font-size:15px}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:linear-gradient(135deg,#FFC24A,#F08A0A);color:#20160A;box-shadow:0 12px 24px -16px rgba(240,138,10,.9)}
.btn-primary:hover{filter:brightness(1.05);transform:translateY(-1px);color:#20160A;text-decoration:none}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-ghost{background:#fff;color:var(--ink-900);border-color:rgba(20,23,27,.16)}
.btn-ghost:hover{background:#fff;border-color:rgba(245,166,35,.55);transform:translateY(-1px);color:var(--ink-900);text-decoration:none}
.btn-ghost:active{transform:translateY(0) scale(.99)}
.btn-outline-light{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:rgba(245,166,35,.7);color:#fff;transform:translateY(-1px);text-decoration:none}
.btn-block{width:100%}

/* ---------- 分类导航条 ---------- */
.cat-bar{background:#fff;border-bottom:var(--line)}
.cat-bar-inner{display:flex;align-items:center;gap:8px;min-height:48px;overflow-x:auto;scrollbar-width:none}
.cat-bar-inner::-webkit-scrollbar{display:none}
.cat-chip{flex:none;display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:999px;font-size:14px;font-weight:600;color:var(--steel-600);white-space:nowrap;border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease}
.cat-chip:hover{color:var(--ink-900);background:rgba(20,23,27,.04);text-decoration:none}
.cat-chip.is-active{background:var(--volt-soft);color:#7A4A00;border-color:rgba(245,166,35,.4)}

/* ---------- 移动菜单 ---------- */
.mobile-menu{display:none;background:#fff;border-top:var(--line)}
.mobile-menu.is-open{display:block}
.mobile-menu .container{padding-top:16px;padding-bottom:20px}
.mobile-link{display:flex;align-items:center;height:48px;font-size:15px;font-weight:600;color:var(--ink-900);border-bottom:1px solid rgba(20,23,27,.06)}
.mobile-link:last-child{border-bottom:0}
.mobile-link.is-active{color:#B4690A}
.mobile-link:hover{color:var(--volt-600);text-decoration:none}
.nav-search.nav-search--mobile{display:flex;max-width:none;margin:0 0 12px}

/* ---------- 面包屑 ---------- */
.crumb{padding:22px 0 0;font-size:13px;color:var(--steel-500)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;padding:0}
.crumb li{display:inline-flex;align-items:center;gap:8px}
.crumb li:not(:last-child)::after{content:"/";color:var(--silver-300)}
.crumb a:hover{color:var(--volt-600);text-decoration:underline}
.crumb .current{color:var(--ink-900);font-weight:600}

/* ---------- Hero ---------- */
.cat-hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);color:#fff;padding:52px 0 60px;margin-top:18px}
.cat-hero::after{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;opacity:.16;pointer-events:none}
.cat-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(58% 78% at 84% 14%,rgba(245,166,35,.22),transparent 62%);pointer-events:none}
.cat-hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;background:rgba(245,166,35,.16);border:1px solid rgba(245,166,35,.42);color:#FFD79A;font-size:13px;font-weight:700;letter-spacing:.02em}
.hero-tag i{font-size:12px}
.cat-hero h1{margin:18px 0 16px;font-size:clamp(28px,4.1vw,48px);line-height:1.18;font-weight:800;letter-spacing:-.01em;color:#fff}
.hero-sub{font-size:clamp(15px,1.4vw,18px);line-height:1.75;color:rgba(255,255,255,.84);max-width:600px}
.hero-text{margin-top:14px;font-size:15px;line-height:1.9;color:rgba(255,255,255,.64);max-width:600px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-lg);box-shadow:0 30px 60px -34px rgba(0,0,0,.85)}
.float-badge{position:absolute;background:#fff;border-radius:16px;padding:12px 16px;box-shadow:0 10px 24px -12px rgba(20,23,27,.30);color:var(--ink-900)}
.float-badge strong{display:block;font-size:20px;font-weight:800;line-height:1.2;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.float-badge span{display:block;font-size:12px;color:var(--steel-500);line-height:1.5;margin-top:2px}
.badge-a{left:-18px;bottom:34px}
.badge-b{right:18px;top:-16px}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .badge-a{left:12px;bottom:16px}
  .badge-b{right:12px;top:12px}
}
@media (max-width:520px){
  .cat-hero{padding:40px 0 44px}
  .hero-actions .btn{width:100%}
  .float-badge{padding:10px 12px}
  .float-badge strong{font-size:17px}
}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:84px 0}}
.section-head{max-width:760px;margin-bottom:34px}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--volt-600);text-transform:uppercase}
.section-head .eyebrow::before{content:"";width:26px;height:2px;background:var(--volt);border-radius:2px}
.h2{margin:12px 0 12px;font-size:clamp(24px,2.6vw,36px);line-height:1.28;font-weight:700;letter-spacing:-.01em;color:var(--ink-900)}
.section-head p{color:var(--steel-600);font-size:16px;line-height:1.85}

/* ---------- 图文交替 ---------- */
.feature-list-wrap{display:grid;gap:0}
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;padding:34px 0;border-top:var(--line)}
.feature-row:first-child{border-top:0;padding-top:0}
.feature-row:last-child{padding-bottom:0}
.feature-row.reverse .feature-media{order:2}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-card);box-shadow:var(--shadow-card);transition:transform .45s ease,box-shadow .45s ease}
.feature-row:hover .feature-media img{transform:scale(1.015);box-shadow:var(--shadow-hover)}
.feature-text .step-tag{display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:999px;background:var(--volt-soft);color:#7A4A00;font-size:12px;font-weight:700;letter-spacing:.04em}
.feature-text h3{margin:14px 0 12px;font-size:clamp(20px,1.9vw,24px);font-weight:700;line-height:1.45;letter-spacing:-.01em}
.feature-text p{color:var(--steel-600);font-size:15px;line-height:1.9;margin-bottom:12px}
.feature-points{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:10px}
.feature-points li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-800);line-height:1.75}
.feature-points i{color:var(--volt-600);font-size:13px;margin-top:6px;flex:none}
@media (max-width:767px){
  .feature-row{grid-template-columns:1fr;gap:22px;padding:28px 0}
  .feature-row.reverse .feature-media{order:0}
}

/* ---------- 步骤流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{position:relative;background:#fff;border:var(--line);border-radius:var(--radius-card);padding:24px 20px;box-shadow:var(--shadow-card);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(245,166,35,.45)}
.step-num{width:38px;height:38px;border-radius:999px;display:grid;place-items:center;background:var(--ink-900);color:#fff;font-weight:800;font-size:15px;margin-bottom:14px;font-variant-numeric:tabular-nums}
.step h3{font-size:17px;font-weight:700;margin-bottom:8px;line-height:1.5}
.step p{font-size:14px;line-height:1.8;color:var(--steel-600)}
.step:not(:last-child)::after{content:"";position:absolute;top:43px;right:-20px;width:20px;height:2px;background:rgba(20,23,27,.14)}
@media (max-width:1023px){.steps{grid-template-columns:repeat(2,1fr)}.step:not(:last-child)::after{display:none}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* ---------- 数据徽章带 ---------- */
.stats-band{background:var(--sand);border-radius:var(--radius-lg);padding:34px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;border:1px solid rgba(245,166,35,.24)}
.stat{text-align:left}
.stat-num{font-size:clamp(26px,3vw,38px);font-weight:800;letter-spacing:-.02em;line-height:1.15;color:var(--ink-900);font-variant-numeric:tabular-nums}
.stat-num em{font-style:normal;font-size:.55em;font-weight:700;color:var(--volt-600);margin-left:4px}
.stat-label{font-size:14px;color:var(--steel-600);margin-top:6px;line-height:1.7}
.stat-rule{height:3px;width:34px;border-radius:3px;background:linear-gradient(90deg,#FFC24A,#F08A0A);margin-bottom:14px}
@media (max-width:767px){.stats-band{grid-template-columns:1fr;padding:26px;gap:18px}}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px}
.faq-item{background:#fff;border:var(--line);border-radius:18px;padding:0 20px;transition:background .25s ease,border-color .25s ease,box-shadow .25s ease}
.faq-item:hover{border-color:rgba(245,166,35,.4)}
.faq-item[open]{background:var(--sand);border-color:rgba(245,166,35,.38);box-shadow:var(--shadow-card)}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;cursor:pointer;font-size:16px;font-weight:600;line-height:1.6}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{color:var(--volt-600);flex:none;font-size:14px;transition:transform .25s ease}
.faq-item[open] summary i{transform:rotate(45deg)}
.faq-answer{padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--steel-600);max-width:920px}

/* ---------- CTA ---------- */
.cta-card{position:relative;overflow:hidden;display:grid;grid-template-columns:1fr 1fr;gap:44px;background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);border-radius:var(--radius-lg);padding:48px;color:#fff}
.cta-card::after{content:"";position:absolute;inset:0;background:radial-gradient(50% 70% at 12% 90%,rgba(245,166,35,.18),transparent 62%);pointer-events:none}
.cta-card > *{position:relative;z-index:2}
.cta-card h2{font-size:clamp(23px,2.4vw,32px);line-height:1.3;font-weight:700;letter-spacing:-.01em;margin-bottom:14px;color:#fff}
.cta-card p{font-size:15px;line-height:1.9;color:rgba(255,255,255,.72);margin-bottom:20px}
.cta-points{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.cta-points li{display:flex;gap:10px;font-size:14.5px;color:rgba(255,255,255,.82);line-height:1.7}
.cta-points i{color:var(--volt);font-size:13px;margin-top:6px;flex:none}
.field{display:grid;gap:8px;margin-bottom:16px}
.field label{font-size:13px;color:rgba(255,255,255,.72)}
.field input,.field textarea{
  width:100%;height:48px;border-radius:var(--radius-input);
  border:1px solid rgba(255,255,255,.20);background:rgba(255,255,255,.07);
  color:#fff;padding:0 14px;font-size:15px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.42)}
.field input:focus,.field textarea:focus{border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18);background:rgba(255,255,255,.1)}
.form-note{margin-top:12px;font-size:12.5px;line-height:1.7;color:rgba(255,255,255,.52)}
@media (max-width:1023px){
  .cta-card{grid-template-columns:1fr;gap:30px;padding:34px}
}
@media (max-width:520px){.cta-card{padding:26px}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);margin-top:56px;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:11px;background:linear-gradient(135deg,#FFC24A,#F08A0A);display:grid;place-items:center;color:#1E232A;flex:none}
.footer-brand .brand-mark svg{width:19px;height:19px}
.footer-brand strong{display:block;color:#fff;font-size:16px;font-weight:800;line-height:1.25;letter-spacing:-.01em}
.footer-brand small{display:block;font-size:11px;letter-spacing:.08em;color:rgba(255,255,255,.45);line-height:1.5}
.footer-intro{margin:0;font-size:14px;line-height:1.9;color:rgba(255,255,255,.58)}
.footer-title{margin:0 0 14px;font-size:14px;font-weight:700;color:#fff;letter-spacing:.04em}
.footer-links a{display:block;font-size:14px;line-height:2.1;color:rgba(255,255,255,.64);transition:color .2s ease,padding-left .2s ease}
.footer-links a:hover{color:var(--volt);text-decoration:none;padding-left:4px}
.footer-contact{list-style:none;padding:0;margin:0;display:grid;gap:10px;font-size:14px;color:rgba(255,255,255,.64)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;line-height:1.7}
.footer-contact i{color:var(--volt);margin-top:6px;width:15px;flex:none;font-size:13px}
.footer-bottom{margin-top:42px;padding:18px 0 24px;border-top:var(--line-dark);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.48)}
.footer-bottom a{color:rgba(255,255,255,.72)}
.footer-bottom a:hover{color:var(--volt);text-decoration:underline}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:640px){.footer-grid{grid-template-columns:1fr;gap:28px}.site-footer{padding-top:42px}}

/* roulang page: category4 */
:root{
  --ink-900:#14171B;
  --ink-800:#1E232A;
  --steel-600:#5B6470;
  --steel-400:#8A929C;
  --silver-300:#C6CBD2;
  --paper:#F7F8F9;
  --sand:#FBF6EC;
  --volt:#F5A623;
  --volt-600:#E08A0B;
  --volt-soft:#FFE9C2;
  --radius-card:22px;
  --radius-lg:28px;
  --radius-btn:14px;
  --shadow-card:0 18px 40px -28px rgba(20,23,27,.35);
  --shadow-hover:0 28px 56px -28px rgba(20,23,27,.45);
  --shadow-float:0 10px 24px -12px rgba(20,23,27,.30);
  --border:1px solid rgba(20,23,27,.08);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:132px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--volt-600);}
button{background:none;border:0;cursor:pointer;font:inherit;color:inherit;}
input,textarea{font:inherit;}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 32px;}}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink-900);color:#aab2bc;font-size:12.5px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:38px;}
.topbar-left{display:flex;align-items:center;gap:8px;min-width:0;}
.topbar-left span{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.topbar-left i{color:var(--volt);font-size:12px;}
.topbar-right{display:none;align-items:center;gap:22px;}
.topbar-right span{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;}
.topbar-right i{color:var(--volt);font-size:12px;}
@media (min-width:768px){.topbar-right{display:flex;}}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,248,249,.93);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(20,23,27,.08);
}
.header-inner{display:flex;align-items:center;gap:16px;height:64px;}
@media (min-width:1024px){.header-inner{height:72px;gap:26px;}}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  display:grid;place-items:center;width:36px;height:36px;border-radius:11px;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);
  color:#14171B;box-shadow:var(--shadow-float);flex-shrink:0;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:15px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.brand-text small{font-size:11px;color:var(--steel-600);letter-spacing:.02em;white-space:nowrap;}
@media (max-width:520px){
  .brand-text strong{font-size:13.5px;}
  .brand-text small{display:none;}
}
.nav-search{display:none;}
@media (min-width:1024px){
  .nav-search{
    display:flex;align-items:center;gap:10px;
    flex:1 1 auto;max-width:520px;min-width:280px;height:44px;
    padding:0 6px 0 16px;background:#fff;
    border:1px solid rgba(20,23,27,.10);border-radius:999px;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .nav-search:focus-within{border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18);}
}
.nav-search i{color:var(--steel-400);font-size:13.5px;}
.nav-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;line-height:1;padding:0;color:var(--ink-900);
}
.nav-search input::placeholder{color:var(--steel-400);}
.search-btn{
  height:32px;padding:0 16px;border-radius:999px;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);
  color:#14171B;font-size:13px;font-weight:700;white-space:nowrap;
  transition:filter .2s ease,transform .2s ease;
}
.search-btn:hover{filter:brightness(1.05);}
.search-btn:active{transform:scale(.98);}
.nav-links{display:none;}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
}
.nav-link{
  display:inline-flex;align-items:center;height:40px;padding:0 12px;
  border-radius:10px;font-size:14.5px;font-weight:500;color:var(--ink-800);
  transition:background-color .2s ease,color .2s ease;
}
.nav-link:hover{background:rgba(20,23,27,.05);color:var(--volt-600);}
.nav-link.is-active{color:var(--ink-900);font-weight:700;background:rgba(245,166,35,.14);}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;margin-left:auto;border-radius:12px;
  border:1px solid rgba(20,23,27,.12);font-size:16px;color:var(--ink-900);
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--volt);color:var(--volt-600);}
@media (min-width:1024px){.nav-toggle{display:none;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:transform .18s ease,filter .18s ease,box-shadow .18s ease,
             background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#FFC24A,#F08A0A);
  color:#14171B;box-shadow:0 12px 26px -16px rgba(224,138,11,.9);
}
.btn-primary:hover{filter:brightness(1.05);transform:translateY(-1px);color:#14171B;}
.btn-primary:active{transform:translateY(0) scale(.99);}
.btn-ghost{background:transparent;border:1px solid rgba(20,23,27,.16);color:var(--ink-900);}
.btn-ghost:hover{border-color:var(--volt);color:var(--volt-600);transform:translateY(-1px);}
.btn-sm{min-height:38px;padding:0 16px;font-size:13.5px;border-radius:12px;}

/* ---------- 移动端抽屉 ---------- */
.mobile-panel{display:none;border-top:1px solid rgba(20,23,27,.08);background:#fff;padding:16px 0 20px;}
.mobile-panel.is-open{display:block;}
.mobile-panel .container{display:flex;flex-direction:column;gap:10px;}
.mobile-search{
  display:flex;align-items:center;gap:10px;height:46px;padding:0 16px;
  border-radius:999px;background:var(--paper);border:1px solid rgba(20,23,27,.10);
}
.mobile-search i{color:var(--steel-400);font-size:13.5px;}
.mobile-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;}
.mobile-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:46px;padding:0 14px;border-radius:12px;
  background:var(--paper);font-size:15px;font-weight:500;
}
.mobile-link:hover{background:rgba(245,166,35,.12);}
.mobile-link.is-active{background:var(--volt-soft);font-weight:700;}

/* ---------- 分类导航条 ---------- */
.cat-bar{background:#fff;border-bottom:1px solid rgba(20,23,27,.08);}
.cat-bar-inner{
  display:flex;align-items:center;gap:8px;height:48px;
  overflow-x:auto;scrollbar-width:none;
}
.cat-bar-inner::-webkit-scrollbar{display:none;}
.cat-bar-label{
  font-size:12px;color:var(--steel-400);letter-spacing:.08em;
  white-space:nowrap;padding-right:6px;
}
.cat-bar a{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:999px;font-size:13.5px;font-weight:500;
  color:var(--steel-600);white-space:nowrap;
  transition:background-color .2s ease,color .2s ease;
}
.cat-bar a:hover{background:rgba(245,166,35,.12);color:var(--volt-600);}
.cat-bar a.is-current{background:var(--volt-soft);color:#8a5300;font-weight:700;}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:20px 0 0;font-size:12.5px;color:var(--steel-600);}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--silver-300);}
.breadcrumb .current{color:var(--ink-900);font-weight:600;}

/* ---------- Hero ---------- */
.kb-hero{
  position:relative;margin-top:18px;border-radius:var(--radius-lg);
  overflow:hidden;background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
  color:#fff;box-shadow:0 34px 70px -46px rgba(20,23,27,.9);
}
.kb-hero-bg{
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;opacity:.22;
}
.kb-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 80% 16%,rgba(245,166,35,.22),transparent 56%);
}
.kb-hero-inner{position:relative;z-index:2;display:grid;gap:26px;padding:36px 22px 34px;}
@media (min-width:1024px){
  .kb-hero-inner{grid-template-columns:1.32fr .68fr;align-items:center;padding:58px 52px 54px;gap:44px;}
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;
  border-radius:999px;background:rgba(245,166,35,.16);
  border:1px solid rgba(245,166,35,.36);color:#FFD48A;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;margin-bottom:16px;
}
.hero-eyebrow i{font-size:11px;}
.kb-hero h1{
  font-size:clamp(27px,3.7vw,44px);line-height:1.2;font-weight:800;
  letter-spacing:-.01em;margin-bottom:14px;
}
.hero-sub{
  font-size:15.5px;line-height:1.85;color:#c5cbd3;max-width:46ch;margin-bottom:24px;
}
.hero-badges{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
@media (min-width:640px){.hero-badges{grid-template-columns:repeat(3,minmax(0,1fr));}}
.hero-badge{
  background:rgba(255,255,255,.95);color:var(--ink-900);
  border-radius:16px;padding:13px 15px;box-shadow:var(--shadow-float);
}
.hero-badge strong{
  display:block;font-size:20px;font-weight:800;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;line-height:1.3;
}
.hero-badge span{font-size:12px;color:var(--steel-600);line-height:1.5;display:block;}
.kb-hero-media{
  position:relative;border-radius:20px;overflow:hidden;
  box-shadow:0 26px 52px -32px rgba(0,0,0,.85);border:1px solid rgba(255,255,255,.12);
}
.kb-hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.media-badge{
  position:absolute;left:14px;bottom:14px;background:#fff;color:var(--ink-900);
  border-radius:14px;padding:9px 14px;box-shadow:var(--shadow-float);
}
.media-badge strong{display:block;font-size:11.5px;font-weight:700;color:var(--volt-600);letter-spacing:.02em;}
.media-badge span{font-size:11.5px;color:var(--steel-600);}

/* ---------- 板块与标题 ---------- */
.kb-section{padding-top:56px;}
@media (min-width:1024px){.kb-section{padding-top:84px;}}
.section-head{max-width:740px;margin-bottom:6px;}
.section-head h2{
  font-size:clamp(22px,2.5vw,32px);font-weight:700;line-height:1.32;
  letter-spacing:-.01em;margin-bottom:10px;
}
.section-head p{font-size:15px;color:var(--steel-600);line-height:1.85;}

/* ---------- 目录 + 内容 ---------- */
.kb-grid{display:grid;gap:22px;}
@media (min-width:1024px){
  .kb-grid{grid-template-columns:280px minmax(0,1fr);gap:32px;align-items:start;}
}
.kb-toc{
  background:#fff;border:var(--border);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-card);
}
@media (min-width:1024px){.kb-toc{position:sticky;top:144px;}}
.toc-title{
  font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--steel-400);
  margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:flex;align-items:center;gap:10px;min-height:44px;padding:0 12px;
  border-radius:10px;font-size:14.5px;color:var(--ink-800);
  transition:background-color .2s ease,color .2s ease;
}
.toc-list a:hover{background:rgba(245,166,35,.12);color:var(--volt-600);}
.toc-list a.is-current{background:rgba(245,166,35,.16);color:#8a5300;font-weight:700;}
.toc-list .idx{
  font-size:11.5px;color:var(--steel-400);font-variant-numeric:tabular-nums;
  min-width:16px;
}
.toc-list a.is-current .idx{color:var(--volt-600);}
.toc-foot{margin-top:18px;padding-top:18px;border-top:1px solid rgba(20,23,27,.08);}
.toc-foot p{font-size:12.5px;color:var(--steel-600);line-height:1.8;margin-bottom:12px;}
.toc-foot .btn{width:100%;}

.kb-article{
  background:#fff;border:var(--border);border-radius:var(--radius-card);
  padding:24px 20px;box-shadow:var(--shadow-card);margin-bottom:18px;
}
@media (min-width:1024px){.kb-article{padding:34px 38px;margin-bottom:22px;}}
.kb-article h2{
  font-size:clamp(19px,2.1vw,25px);font-weight:700;line-height:1.42;
  padding-left:14px;border-left:4px solid var(--volt);
  letter-spacing:-.01em;margin-bottom:16px;
}
.kb-article h3{font-size:17px;font-weight:700;margin:22px 0 8px;letter-spacing:-.01em;}
.kb-article p{color:#2c333b;line-height:1.92;margin-bottom:14px;}
.kb-article p:last-child{margin-bottom:0;}
.cycle-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0;}
@media (min-width:768px){.cycle-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.cycle-item{
  background:var(--paper);border:1px solid rgba(20,23,27,.06);
  border-radius:14px;padding:13px 15px;
}
.cycle-item strong{
  display:block;font-size:18px;font-weight:800;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;line-height:1.4;
}
.cycle-item span{font-size:12.5px;color:var(--steel-600);}
.kb-tip{
  display:flex;gap:12px;background:var(--sand);border-left:3px solid var(--volt);
  border-radius:12px;padding:15px 18px;margin-top:16px;
}
.kb-tip i{color:var(--volt-600);margin-top:4px;font-size:13px;}
.kb-tip p{margin:0;font-size:14.5px;color:#4a4033;line-height:1.85;}
.check-list{display:grid;gap:10px;margin:16px 0 4px;}
.check-list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14.5px;color:#2c333b;line-height:1.85;
  background:var(--paper);border-radius:12px;padding:11px 14px;
}
.check-list i{color:var(--volt-600);font-size:12px;margin-top:6px;flex-shrink:0;}

/* ---------- 资料卡 ---------- */
.res-grid{display:grid;gap:16px;margin-top:24px;}
.res-card{
  display:grid;grid-template-columns:1fr;background:#fff;border:var(--border);
  border-radius:18px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
@media (min-width:640px){.res-card{grid-template-columns:184px minmax(0,1fr);}}
.res-card:hover{
  border-color:rgba(245,166,35,.45);box-shadow:var(--shadow-hover);transform:translateY(-2px);
}
.res-thumb{overflow:hidden;aspect-ratio:16/10;}
.res-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.res-card:hover .res-thumb img{transform:scale(1.04);}
@media (min-width:640px){.res-thumb{aspect-ratio:auto;height:100%;min-height:140px;}}
.res-body{padding:18px 20px;display:flex;flex-direction:column;gap:8px;}
.res-tag{
  align-self:flex-start;display:inline-flex;align-items:center;height:24px;
  padding:0 10px;border-radius:999px;background:var(--volt-soft);
  color:#8a5300;font-size:11.5px;font-weight:700;letter-spacing:.02em;
}
.res-body h3{font-size:16.5px;font-weight:700;line-height:1.5;letter-spacing:-.01em;}
.res-body p{font-size:14px;color:var(--steel-600);line-height:1.8;}
.res-link{
  display:inline-flex;align-items:center;gap:6px;min-height:32px;margin-top:auto;
  font-size:13.5px;font-weight:700;color:var(--volt-600);
}
.res-link i{font-size:11px;transition:transform .2s ease;}
.res-link:hover i{transform:translateX(3px);}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;margin-top:24px;}
@media (min-width:1024px){.faq-list{grid-template-columns:1fr 1fr;gap:16px;}}
.faq-item{
  background:#fff;border:var(--border);border-radius:16px;padding:0 18px;
  transition:background-color .2s ease,border-color .2s ease;
}
.faq-item[open]{background:var(--sand);border-color:rgba(245,166,35,.35);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;
  justify-content:space-between;gap:14px;min-height:60px;padding:14px 0;
  font-size:15.5px;font-weight:600;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary i{color:var(--volt-600);font-size:13px;flex-shrink:0;transition:transform .25s ease;}
.faq-item[open] summary i{transform:rotate(45deg);}
.faq-answer{padding:0 0 18px;font-size:14.5px;line-height:1.9;color:var(--steel-600);}

/* ---------- CTA ---------- */
.cta-card{
  display:grid;gap:24px;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
  padding:30px 22px;color:#fff;box-shadow:0 34px 68px -44px rgba(20,23,27,.95);
}
@media (min-width:1024px){
  .cta-card{grid-template-columns:1fr .86fr;align-items:center;padding:46px 48px;gap:40px;}
}
.cta-card h2{
  font-size:clamp(21px,2.6vw,31px);line-height:1.32;font-weight:800;
  letter-spacing:-.01em;margin-bottom:12px;
}
.cta-card p{font-size:14.5px;line-height:1.9;color:#c2c8d0;}
.cta-form{
  display:grid;gap:12px;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.13);border-radius:20px;padding:18px;
}
.field{display:grid;gap:6px;}
.field label{font-size:12.5px;color:#aab2bc;}
.field input,.field textarea{
  width:100%;height:46px;border-radius:12px;border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.94);padding:0 14px;font-size:14.5px;
  color:var(--ink-900);outline:none;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:88px;padding:11px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field textarea:focus{
  border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18);
}
.form-note{font-size:11.5px;color:#98a0aa;line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:76px;background:var(--ink-900);color:#98a0aa;padding:54px 0 0;}
.footer-grid{display:grid;gap:30px;padding-bottom:38px;}
@media (min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:34px;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{
  display:grid;place-items:center;width:36px;height:36px;border-radius:11px;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);color:#14171B;flex-shrink:0;
}
.footer-brand .brand-mark svg{width:20px;height:20px;}
.footer-brand strong{display:block;color:#fff;font-size:15px;font-weight:800;line-height:1.3;}
.footer-brand small{display:block;font-size:11.5px;color:#8d949d;letter-spacing:.02em;}
.footer-intro{font-size:13.5px;line-height:1.9;color:#98a0aa;max-width:350px;}
.footer-title{font-size:13px;font-weight:700;color:#fff;letter-spacing:.06em;margin-bottom:12px;}
.footer-links{display:flex;flex-direction:column;gap:1px;}
.footer-links a{
  display:inline-flex;align-items:center;min-height:34px;font-size:13.5px;
  color:#98a0aa;transition:color .2s ease;
}
.footer-links a:hover{color:var(--volt);}
.footer-contact{display:grid;gap:10px;font-size:13.5px;color:#98a0aa;}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;line-height:1.7;}
.footer-contact i{color:var(--volt);margin-top:5px;font-size:12.5px;flex-shrink:0;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);padding:18px 0 22px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:#7d848d;
}
.footer-bottom a{color:#a7aeb8;}
.footer-bottom a:hover{color:var(--volt);}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category5 */
:root{
  --ink-900:#14171B;
  --ink-800:#1E232A;
  --steel-600:#5B6470;
  --silver-300:#C6CBD2;
  --paper:#F7F8F9;
  --sand:#FBF6EC;
  --volt:#F5A623;
  --volt-600:#E08A0B;
  --volt-soft:#FFE9C2;
  --line:rgba(20,23,27,.08);
  --line-strong:rgba(20,23,27,.14);
  --r-card:22px;
  --r-big:28px;
  --r-btn:14px;
  --r-input:12px;
  --shadow-card:0 18px 40px -28px rgba(20,23,27,.35);
  --shadow-hover:0 28px 56px -28px rgba(20,23,27,.45);
  --shadow-badge:0 10px 24px -12px rgba(20,23,27,.30);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:96px;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--paper);
  color:var(--ink-900);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .22s ease;}
button,input,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4,p{margin:0;}
strong{font-weight:700;}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:6px;}

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

/* ============ 顶部信息条 ============ */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.70);font-size:12.5px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:38px;}
.topbar-left{display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-left i{color:var(--volt);}
.topbar-right{display:flex;align-items:center;gap:20px;white-space:nowrap;}
.topbar-right a:hover{color:var(--volt);}
.topbar-right .tp-phone{font-variant-numeric:tabular-nums;font-weight:600;color:#fff;}
@media (max-width:767px){.topbar-right{display:none;}}

/* ============ 主导航 ============ */
.site-header{position:relative;z-index:80;}
.nav-shell{
  position:sticky;top:0;z-index:80;
  background:rgba(247,248,249,.86);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:18px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);
  color:#14171B;display:grid;place-items:center;
  box-shadow:0 10px 22px -14px rgba(240,138,10,.9);
}
.brand-mark svg{width:19px;height:19px;}
.brand-text strong{display:block;font-size:15px;font-weight:800;letter-spacing:-.01em;line-height:1.3;}
.brand-text small{display:block;font-size:11px;color:var(--steel-600);letter-spacing:.05em;line-height:1.4;}

.search-box{
  flex:1 1 auto;max-width:400px;display:flex;align-items:center;gap:8px;
  height:46px;padding:0 6px 0 16px;
  background:#fff;border:1px solid var(--line-strong);border-radius:999px;
  box-shadow:0 8px 20px -18px rgba(20,23,27,.55);
  transition:border-color .22s ease,box-shadow .22s ease;
}
.search-box:focus-within{border-color:var(--volt);box-shadow:0 0 0 3px rgba(245,166,35,.18);}
.search-box .s-icon{color:#98A0AA;font-size:14px;flex:0 0 auto;}
.search-box input{flex:1 1 auto;min-width:0;border:0;outline:none;background:transparent;font-size:14px;}
.search-box input::placeholder{color:#9AA1AB;}
.search-box button{
  flex:0 0 auto;height:34px;padding:0 16px;border-radius:999px;
  background:linear-gradient(135deg,#FFC24A,#F08A0A);color:#14171B;
  font-size:13px;font-weight:700;transition:filter .22s ease,transform .22s ease;
}
.search-box button:hover{filter:brightness(1.05);transform:translateY(-1px);}
.search-box button:active{transform:translateY(0) scale(.99);}

.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-link{
  display:inline-flex;align-items:center;height:38px;padding:0 11px;
  font-size:13.5px;font-weight:500;color:#3B434E;border-radius:10px;
  white-space:nowrap;transition:background .22s ease,color .22s ease;
}
.nav-link:hover{color:var(--volt-600);background:rgba(245,166,35,.10);}
.nav-link.is-active{color:var(--ink-900);font-weight:700;background:var(--volt-soft);}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;margin-left:auto;border-radius:12px;
  border:1px solid var(--line-strong);background:#fff;color:var(--ink-900);font-size:17px;
}
.nav-toggle:hover{border-color:var(--volt);color:var(--volt-600);}

/* 移动抽屉 */
.mobile-drawer{
  display:none;border-top:1px solid var(--line);
  background:rgba(255,255,255,.98);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  padding:16px 0 22px;
}
.mobile-drawer.is-open{display:block;}
.drawer-search{display:flex;align-items:center;gap:8px;height:46px;padding:0 6px 0 16px;background:var(--paper);border:1px solid var(--line-strong);border-radius:999px;margin-bottom:14px;}
.drawer-search input{flex:1 1 auto;min-width:0;border:0;outline:none;background:transparent;font-size:14px;}
.drawer-search button{flex:0 0 auto;height:34px;padding:0 16px;border-radius:999px;background:linear-gradient(135deg,#FFC24A,#F08A0A);color:#14171B;font-size:13px;font-weight:700;}
.drawer-links{display:grid;gap:4px;}
.drawer-links a{display:flex;align-items:center;justify-content:space-between;min-height:46px;padding:0 14px;border-radius:12px;font-size:14.5px;font-weight:500;color:#3B434E;background:#fff;border:1px solid var(--line);}
.drawer-links a:hover{border-color:rgba(245,166,35,.45);color:var(--volt-600);}
.drawer-links a.is-active{background:var(--volt-soft);border-color:rgba(245,166,35,.45);font-weight:700;color:var(--ink-900);}
.drawer-links a i{font-size:12px;color:#9AA1AB;}

@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-inner{height:64px;}
}
@media (max-width:639px){
  .search-box{display:none;}
}

/* ============ 通用按钮 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .22s ease,filter .22s ease,background .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease;
  min-height:44px;
}
.btn-primary{background:linear-gradient(135deg,#FFC24A,#F08A0A);color:#14171B;box-shadow:0 14px 28px -18px rgba(240,138,10,.95);}
.btn-primary:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 20px 34px -18px rgba(240,138,10,.95);}
.btn-primary:active{transform:translateY(0) scale(.99);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.28);}
.btn-ghost:hover{border-color:var(--volt);color:var(--volt);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0) scale(.99);}
.btn-outline{background:#fff;color:var(--ink-900);border-color:var(--line-strong);}
.btn-outline:hover{border-color:var(--volt);color:var(--volt-600);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:11px;}
.btn-lg{height:54px;padding:0 30px;font-size:16px;}

.tag{
  display:inline-flex;align-items:center;gap:5px;height:26px;padding:0 11px;
  border-radius:999px;font-size:11.5px;font-weight:600;letter-spacing:.02em;
  background:var(--volt-soft);color:#8A5200;
}
.tag-dark{background:rgba(20,23,27,.62);color:#fff;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);}
.tag-line{background:#fff;color:var(--steel-600);border:1px solid var(--line-strong);}

/* ============ 页面 Hero ============ */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
  padding:44px 0 72px;
}
.page-hero::after{
  content:"";position:absolute;inset:auto -12% -60% auto;width:720px;height:720px;
  background:radial-gradient(circle,rgba(245,166,35,.22) 0%,rgba(245,166,35,0) 62%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(255,255,255,.58);margin-bottom:24px;}
.breadcrumb a:hover{color:var(--volt);}
.breadcrumb .current{color:rgba(255,255,255,.94);font-weight:600;}

.hero-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center;}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.12fr .88fr;gap:52px;}}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;color:var(--volt);letter-spacing:.06em;margin-bottom:14px;}
.hero-eyebrow::before{content:"";width:26px;height:2px;background:var(--volt);border-radius:2px;}
.hero-title{
  font-size:clamp(30px,4.2vw,50px);line-height:1.16;font-weight:800;letter-spacing:-.012em;
  color:#fff;
}
.hero-lead{
  margin-top:18px;max-width:620px;font-size:15.5px;line-height:1.95;
  color:rgba(255,255,255,.74);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:30px;max-width:560px;}
@media (min-width:640px){.hero-stats{grid-template-columns:repeat(3,minmax(0,1fr));}}
.stat-pill{
  border-radius:16px;padding:12px 15px;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.13);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.stat-pill strong{display:block;font-size:20px;font-weight:800;color:#fff;font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1.3;}
.stat-pill span{display:block;font-size:11.5px;color:rgba(255,255,255,.60);margin-top:2px;}

.hero-visual{position:relative;border-radius:var(--r-big);overflow:hidden;border:1px solid rgba(255,255,255,.12);box-shadow:0 34px 70px -34px rgba(0,0,0,.75);}
.hero-visual img{width:100%;height:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,23,27,0) 45%,rgba(20,23,27,.55) 100%);}
.float-card{
  position:absolute;left:18px;bottom:18px;z-index:3;
  background:#fff;color:var(--ink-900);border-radius:16px;padding:12px 16px;
  box-shadow:var(--shadow-badge);min-width:148px;
}
.float-card strong{display:block;font-size:17px;font-weight:800;letter-spacing:-.01em;line-height:1.35;}
.float-card span{display:block;font-size:11.5px;color:var(--steel-600);margin-top:2px;}

/* ============ 实时状态条 ============ */
.live-wrap{margin-top:-34px;position:relative;z-index:10;}
.live-bar{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:14px 20px;font-size:13.5px;color:var(--steel-600);
  box-shadow:0 22px 44px -34px rgba(20,23,27,.5);
}
.live-dot{width:8px;height:8px;border-radius:50%;background:#22C55E;flex:0 0 auto;box-shadow:0 0 0 4px rgba(34,197,94,.16);animation:pulseDot 2s infinite;}
@keyframes pulseDot{50%{box-shadow:0 0 0 9px rgba(34,197,94,0);}}
.live-bar .live-text{flex:1 1 240px;min-width:0;}
.live-bar a{font-weight:700;color:var(--volt-600);white-space:nowrap;}
.live-bar a:hover{text-decoration:underline;}

/* ============ 板块结构 ============ */
.section{padding:56px 0;}
@media (min-width:1024px){.section{padding:88px 0;}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px;}
.section-title{font-size:clamp(24px,2.6vw,34px);line-height:1.28;font-weight:700;letter-spacing:-.012em;}
.section-desc{margin-top:10px;font-size:14.5px;line-height:1.85;color:var(--steel-600);max-width:660px;}
.link-more{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--volt-600);white-space:nowrap;}
.link-more:hover{text-decoration:underline;}
.link-more i{font-size:12px;}

/* ============ 案例卡流 ============ */
.case-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:640px){.case-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.case-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}}
.case-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(245,166,35,.45);}
.case-media{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--silver-300);}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.case-card:hover .case-media img{transform:scale(1.04);}
.case-tags{position:absolute;left:12px;top:12px;display:flex;flex-wrap:wrap;gap:6px;z-index:2;}
.case-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.case-body h3{
  font-size:17px;line-height:1.5;font-weight:700;letter-spacing:-.008em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.case-body p{
  font-size:13.8px;line-height:1.78;color:var(--steel-600);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.case-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--steel-600);
}
.case-meta .cm-left{display:inline-flex;align-items:center;gap:6px;}
.case-meta .cm-left i{color:var(--volt-600);font-size:11px;}
.case-meta .cm-link{font-weight:600;color:var(--ink-900);display:inline-flex;align-items:center;gap:5px;}
.case-card:hover .case-meta .cm-link{color:var(--volt-600);}

/* ============ FAQ 双列 ============ */
.faq-grid{display:grid;grid-template-columns:1fr;gap:14px;}
@media (min-width:1024px){.faq-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start;}}
.faq-col{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.faq-item[open]{background:var(--sand);border-color:rgba(245,166,35,.42);box-shadow:var(--shadow-badge);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 20px;min-height:44px;font-size:15.5px;font-weight:600;line-height:1.6;
  list-style:none;cursor:pointer;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;background:rgba(245,166,35,.15);color:var(--volt-600);
  transition:transform .28s ease,background .28s ease;
}
.faq-icon svg{width:12px;height:12px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--volt);color:#14171B;}
.faq-answer{padding:0 20px 18px;font-size:14.2px;line-height:1.9;color:var(--steel-600);}
.faq-answer strong{color:var(--ink-900);}

/* ============ CTA 大卡 ============ */
.cta-band{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#1E232A 0%,#3A424C 100%);
  border-radius:var(--r-big);padding:32px 24px;
  display:grid;grid-template-columns:1fr;gap:32px;
  border:1px solid rgba(255,255,255,.08);
}
@media (min-width:1024px){.cta-band{grid-template-columns:1.05fr .95fr;padding:52px 56px;gap:48px;align-items:center;}}
.cta-band::after{
  content:"";position:absolute;right:-140px;top:-140px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(245,166,35,.24) 0%,rgba(245,166,35,0) 65%);
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:2;}
.cta-title{font-size:clamp(24px,2.8vw,34px);line-height:1.3;font-weight:700;letter-spacing:-.012em;}
.cta-desc{margin-top:14px;font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.72);max-width:520px;}
.cta-points{display:grid;gap:10px;margin-top:22px;}
.cta-points li{display:flex;align-items:flex-start;gap:10px;font-size:13.8px;color:rgba(255,255,255,.78);}
.cta-points i{color:var(--volt);margin-top:5px;font-size:12px;}
.form-grid{display:grid;gap:12px;}
.form-input{
  width:100%;height:48px;border-radius:var(--r-input);padding:0 16px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);
  color:#fff;font-size:14px;outline:none;
  transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.form-input::placeholder{color:rgba(255,255,255,.44);}
.form-input:focus{border-color:var(--volt);background:rgba(255,255,255,.11);box-shadow:0 0 0 3px rgba(245,166,35,.18);}
textarea.form-input{height:auto;min-height:96px;padding:13px 16px;line-height:1.7;resize:vertical;}
.form-hint{font-size:12px;line-height:1.7;color:rgba(255,255,255,.48);margin-top:4px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.66);margin-top:56px;}
.footer-main{padding:56px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.45fr 1fr 1fr 1.1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px;}
.footer-brand .brand-text strong{font-size:14.5px;color:#fff;}
.footer-brand .brand-text small{color:rgba(255,255,255,.45);}
.footer-intro{font-size:13.5px;line-height:1.95;color:rgba(255,255,255,.52);max-width:350px;}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.01em;}
.footer-links{display:flex;flex-direction:column;gap:0;}
.footer-links a{display:block;font-size:13.5px;line-height:2.1;color:rgba(255,255,255,.60);}
.footer-links a:hover{color:var(--volt);}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;line-height:2.1;color:rgba(255,255,255,.60);}
.footer-contact i{color:var(--volt);font-size:12px;margin-top:7px;flex:0 0 auto;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);margin-top:36px;padding-top:20px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.42);
}
.footer-bottom a{color:rgba(255,255,255,.70);}
.footer-bottom a:hover{color:var(--volt);}

/* 触控与细节收敛 */
@media (max-width:519px){
  .hero-actions .btn{width:100%;}
  .section{padding:44px 0;}
  .cta-band{padding:26px 20px;border-radius:22px;}
  .live-bar{padding:12px 16px;font-size:12.8px;}
}