/* roulang page: index */
:root{
  --brand:#F4541B;
  --brand-700:#C93F0D;
  --brand-50:#FFF2EC;
  --accent:#12B886;
  --ink:#101114;
  --ink-2:#3B3F47;
  --ink-3:#7A808A;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DB;
  --dark-section:#0C0D10;
  --danger:#D64545;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:10px;
  --shadow-1:0 1px 2px rgba(16,17,20,.04);
  --shadow-2:0 8px 24px rgba(16,17,20,.06);
  --shadow-3:0 14px 34px rgba(16,17,20,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:200ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-2);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.78;
  padding-top:72px;
  padding-bottom:calc(76px + env(safe-area-inset-bottom));
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--ink);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--brand)}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{color:var(--ink);line-height:1.25}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 18px}
@media(min-width:768px){.container{padding:0 24px}}
@media(min-width:1280px){.container{padding:0 32px}}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;height:72px;
  background:var(--bg);border-bottom:1px solid var(--line);
  transition:box-shadow var(--dur) var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-2)}
.header-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.01em;font-size:17px;white-space:nowrap}
.logo-mark{
  width:24px;height:24px;border-radius:7px;flex:none;position:relative;
  background:var(--brand);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.25);
}
.logo-mark::after{
  content:"";position:absolute;right:-4px;bottom:-4px;width:10px;height:10px;border-radius:3px;
  background:var(--ink);
}
.logo-dot{color:var(--brand);margin:0 1px}
.main-nav{display:none;align-items:center;gap:6px}
@media(min-width:1024px){.main-nav{display:flex}}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--ink-2);border-radius:8px;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:center;transition:transform var(--dur) var(--ease);border-radius:2px;
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.header-cta{display:none}
@media(min-width:1024px){.header-cta{display:inline-flex}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;background:transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--brand-700);color:#fff;box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-700);background:var(--surface)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ink);padding:6px 2px;font-size:15px}
.btn-text .arrow{transition:transform var(--dur) var(--ease)}
.btn-text:hover{color:var(--brand)}
.btn-text:hover .arrow{transform:translateX(4px)}
.btn-block{width:100%}
@media(min-width:768px){.btn-block{width:auto}}

/* ---------- section ---------- */
.section{padding:56px 0}
@media(min-width:768px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.section-tight{padding:48px 0}
@media(min-width:1024px){.section-tight{padding:72px 0}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,3.6vw,32px);font-weight:700;letter-spacing:-.01em}
.section-head .eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--brand);
  text-transform:uppercase;margin-bottom:10px;
}
.section-desc{max-width:640px;margin-top:10px;color:var(--ink-3);font-size:15px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.badge-soft{background:rgba(18,184,134,.10);color:#0B8A64}
.badge-dark{background:rgba(255,255,255,.08);color:rgba(255,255,255,.86)}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- hero ---------- */
.hero{padding:40px 0 56px}
@media(min-width:1024px){.hero{padding:64px 0 88px}}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:56px}}
.hero h1{
  font-size:clamp(34px,5.6vw,58px);font-weight:800;letter-spacing:-.02em;line-height:1.12;margin:18px 0 20px;
}
.hero h1 em{font-style:normal;color:var(--brand);position:relative;white-space:nowrap}
.hero-sub{font-size:17px;color:var(--ink-2);max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:28px}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:12px 20px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line);
  font-size:14px;color:var(--ink-2);
}
.hero-metrics span{display:inline-flex;align-items:center;gap:8px}
.hero-metrics span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);flex:none}
.hero-metrics i{width:1px;height:14px;background:var(--line);display:inline-block}
.hero-visual{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--brand);box-shadow:var(--shadow-3)}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform 600ms var(--ease)}
.hero-visual:hover img{transform:scale(1.03)}
.hero-visual::after{
  content:"";position:absolute;top:0;right:0;width:56px;height:56px;background:var(--brand);
  clip-path:polygon(100% 0,100% 100%,0 0);
}
.hero-visual .scan{
  position:absolute;top:0;bottom:0;right:0;width:3px;
  background:linear-gradient(180deg,rgba(244,84,27,0),var(--brand),rgba(244,84,27,0));
  animation:scanMove 4s linear infinite;
}
@keyframes scanMove{0%{transform:translateX(0);opacity:.2}50%{opacity:.9}100%{transform:translateX(-320px);opacity:.2}}
.hero-visual .img-fallback{
  position:absolute;inset:0;display:none;align-items:center;justify-content:center;
  background:#E4E0D9;color:var(--ink-3);font-size:14px;
}
.hero-visual.is-error .img-fallback{display:flex}

/* ---------- value cards ---------- */
.value-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.value-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.value-grid{grid-template-columns:repeat(4,1fr)}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-2)}
.card h3{font-size:20px;font-weight:700;margin-bottom:10px}
.card p{font-size:15px;color:var(--ink-3)}
.card-num{
  font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--brand);margin-bottom:14px;display:block;
}
.icon-box{
  width:44px;height:44px;border-radius:12px;background:var(--brand-50);color:var(--brand);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.icon-box svg{width:22px;height:22px}

/* ---------- ladder ---------- */
.ladder{display:grid;gap:16px}
@media(min-width:1024px){.ladder{gap:20px}}
.ladder-item{
  position:relative;display:grid;grid-template-columns:56px 1fr;gap:16px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:22px 24px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.ladder-item:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-2)}
.ladder-item .step-num{
  font-size:36px;font-weight:800;line-height:1;color:transparent;
  -webkit-text-stroke:1px var(--line);letter-spacing:-.02em;
}
.ladder-item:first-child .step-num{-webkit-text-stroke:1px var(--brand);color:var(--brand-50)}
@media(min-width:1024px){
  .ladder-item:nth-child(1){margin-right:180px}
  .ladder-item:nth-child(2){margin-right:120px;margin-left:20px}
  .ladder-item:nth-child(3){margin-right:60px;margin-left:40px}
  .ladder-item:nth-child(4){margin-left:60px}
  .ladder-item .step-num{font-size:48px}
}
.ladder-item h3{font-size:19px;font-weight:700;margin-bottom:6px}
.ladder-item p{font-size:15px;color:var(--ink-3)}
.ladder-item .ladder-link{margin-top:10px}
@media(max-width:1023px){
  .ladder{position:relative;padding-left:22px}
  .ladder::before{content:"";position:absolute;left:5px;top:12px;bottom:12px;width:1px;background:var(--line)}
  .ladder-item::before{
    content:"";position:absolute;left:-22px;top:30px;width:12px;height:12px;border-radius:50%;
    background:var(--surface);border:3px solid var(--brand);
  }
}

/* ---------- matrix ---------- */
.matrix-wrap{
  overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);-webkit-overflow-scrolling:touch;
}
table.matrix{border-collapse:separate;border-spacing:0;width:100%;min-width:680px}
table.matrix th,table.matrix td{padding:16px 18px;text-align:center;font-size:15px;border-bottom:1px solid var(--line)}
table.matrix thead th{
  position:sticky;top:0;background:var(--surface);z-index:2;
  font-size:15px;font-weight:700;color:var(--ink);white-space:nowrap;
}
table.matrix tbody th{
  position:sticky;left:0;background:var(--surface);text-align:left;font-weight:500;color:var(--ink-2);
  min-width:180px;z-index:1;white-space:nowrap;
}
table.matrix tbody tr:last-child th,table.matrix tbody tr:last-child td{border-bottom:0}
table.matrix tbody tr:hover th,table.matrix tbody tr:hover td{background:var(--brand-50)}
.col-feature{color:var(--ink-3)}
.col-recommend{background:rgba(244,84,27,.05)}
table.matrix tbody tr:hover .col-recommend{background:rgba(244,84,27,.10)}
.col-recommend .rec-tag{
  display:inline-block;background:var(--brand);color:#fff;font-size:11px;font-weight:700;
  padding:2px 8px;border-radius:999px;margin-bottom:6px;
}
.rec-name{display:block;font-size:16px}
.rec-price{display:block;font-size:13px;font-weight:400;color:var(--ink-3);margin-top:4px}
.tick{color:var(--accent);font-weight:700}
.cross{color:#B9B3AA}
.matrix-note{margin-top:14px;font-size:13px;color:var(--ink-3)}

/* ---------- dark block ---------- */
.dark-block{
  position:relative;background:var(--dark-section);color:#fff;border-radius:var(--radius-card);
  padding:40px 24px;overflow:hidden;border:1px solid rgba(255,255,255,.08);
}
@media(min-width:768px){.dark-block{padding:48px 40px}}
.dark-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
@media(min-width:1024px){.dark-grid{grid-template-columns:5fr 4fr 3fr;gap:40px}}
.dark-block h2{color:#fff;font-size:clamp(22px,3.4vw,30px);font-weight:700;margin-bottom:10px}
.dark-block p{color:rgba(255,255,255,.62);font-size:15px;max-width:400px}
.dark-corner{position:absolute;width:28px;height:28px;border:1px solid rgba(244,84,27,.7)}
.dark-corner.tl{top:12px;left:12px;border-right:0;border-bottom:0}
.dark-corner.tr{top:12px;right:12px;border-left:0;border-bottom:0}
.dark-corner.bl{bottom:12px;left:12px;border-right:0;border-top:0}
.dark-corner.br{bottom:12px;right:12px;border-left:0;border-top:0}
.countdown{display:flex;gap:12px}
.cd-cell{
  flex:1;min-width:64px;text-align:center;background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);border-radius:12px;padding:12px 8px;
}
.cd-cell b{display:block;font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1;color:#fff;letter-spacing:-.02em}
.cd-cell span{display:block;font-size:12px;color:rgba(255,255,255,.5);margin-top:8px}
.btn-on-dark{background:#fff;color:var(--ink);border-color:#fff}
.btn-on-dark:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.news-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-2)}
.news-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:#EDEAE4}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 500ms var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-thumb .badge{position:absolute;left:12px;top:12px}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:17px;font-weight:700;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:14px;color:var(--ink-3);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink-3)}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 24px;background:var(--surface);
  border:1px dashed var(--line);border-radius:var(--radius-card);color:var(--ink-3);
}
.empty-state svg{width:64px;height:64px;margin:0 auto 16px;color:var(--line);display:block}
.empty-state p{font-size:15px;margin-bottom:18px}
.skeleton{background:linear-gradient(90deg,#EDEAE4 25%,#F6F4F1 37%,#EDEAE4 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite}
@keyframes shimmer{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* ---------- form ---------- */
.consult-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:1024px){.consult-grid{grid-template-columns:5fr 7fr;gap:56px}}
.consult-list li{display:flex;gap:12px;align-items:flex-start;margin-top:16px;font-size:15px;color:var(--ink-2)}
.consult-list li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--brand);flex:none;margin-top:9px}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-1)}
@media(min-width:768px){.form-card{padding:32px}}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--ink-2);font-weight:600;margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--radius-input);border:1px solid var(--line);
  background:#FCFBF9;color:var(--ink);font-size:15px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.field textarea{height:auto;min-height:112px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 2px rgba(244,84,27,.14);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--danger)}
.field .err-msg{display:none;font-size:12px;color:var(--danger);margin-top:8px}
.field.has-error .err-msg{display:block}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--ink-3)}
.check-row input{width:18px;height:18px;height:18px;flex:none;margin-top:3px;accent-color:var(--brand)}
.form-status{display:none;margin-top:16px;padding:14px 16px;border-radius:10px;font-size:14px}
.form-status.ok{display:block;background:rgba(18,184,134,.10);color:#0B8A64;border:1px solid rgba(18,184,134,.28)}
.form-status.bad{display:block;background:rgba(214,69,69,.08);color:var(--danger);border:1px solid rgba(214,69,69,.24)}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:18px 0;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand)}
.faq-q .sign{
  width:26px;height:26px;border-radius:50%;border:1px solid var(--line);flex:none;position:relative;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-700);transform:translate(-50%,-50%);
}
.faq-q .sign::before{width:11px;height:1.6px}
.faq-q .sign::after{width:1.6px;height:11px}
.faq-item.is-open .faq-q .sign{transform:rotate(45deg);background:var(--brand-50);border-color:var(--brand)}
.faq-a{display:none;padding:0 0 20px 0;font-size:15px;color:var(--ink-2)}
.faq-item.is-open .faq-a{display:block}
.faq-a::before{content:"";display:block;width:3px;height:100%;position:absolute}
.faq-a p{background:var(--brand-50);border-left:3px solid var(--brand);border-radius:0 10px 10px 0;padding:14px 16px}

/* ---------- footer ---------- */
.site-footer{background:var(--dark-section);color:rgba(255,255,255,.72);padding:56px 0 28px;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px 24px}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;margin-bottom:14px}
.footer-brand .logo-mark{width:22px;height:22px}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.04em}
.footer-col p{font-size:14px;color:rgba(255,255,255,.55);max-width:320px}
.footer-col li+li{margin-top:10px}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px}
.footer-col a:hover{color:var(--brand)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ---------- mobile tabbar ---------- */
.mobile-tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;display:flex;
  background:var(--surface);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
@media(min-width:1024px){.mobile-tabbar{display:none}}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  height:60px;font-size:10px;color:var(--ink-3);transition:color var(--dur) var(--ease),transform 120ms var(--ease);
}
.tab-item svg{width:22px;height:22px}
.tab-item:active{transform:scale(.94)}
.tab-item.is-active{color:var(--brand);font-weight:600}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 600ms var(--ease),transform 600ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}
::-webkit-scrollbar{height:8px;width:8px}
::-webkit-scrollbar-thumb{background:#D6D0C7;border-radius:999px}
::-webkit-scrollbar-track{background:transparent}

/* roulang page: article */
:root{
  --brand:#F4541B;
  --brand-700:#C93F0D;
  --brand-50:#FFF2EC;
  --accent:#12B886;
  --ink:#101114;
  --ink-2:#3B3F47;
  --ink-3:#7A808A;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DB;
  --dark:#0C0D10;
  --danger:#D64545;
  --r-card:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,17,20,.04),0 8px 24px rgba(16,17,20,.06);
  --sh-2:0 2px 6px rgba(16,17,20,.06),0 18px 40px rgba(16,17,20,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:200ms var(--ease);
  --container:1200px;
  --nav-h:72px;
  --tab-h:60px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-2);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.78;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--ink);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--brand)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3vw,32px);letter-spacing:-.01em}
.section-head p{margin:8px 0 0;color:var(--ink-3);font-size:14px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--brand);text-transform:uppercase}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,17,20,.07)}
.header-inner{height:var(--nav-h);display:flex;align-items:center;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.01em;flex-shrink:0}
.logo-mark{
  width:20px;height:20px;border-radius:6px;background:var(--brand);position:relative;flex-shrink:0;
  box-shadow:0 0 0 3px rgba(244,84,27,.14);
}
.logo-mark::after{content:"";position:absolute;inset:6px;background:#fff;border-radius:2px}
.logo-text{font-size:17px;white-space:nowrap}
.logo-dot{color:var(--brand);margin:0 2px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:10px 14px;font-size:14.5px;font-weight:500;color:var(--ink-2);white-space:nowrap;border-radius:8px;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:center;transition:transform var(--t);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.header-cta{flex-shrink:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  white-space:nowrap;
}
.btn svg{transition:transform var(--t)}
.btn:hover svg{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(244,84,27,.22)}
.btn-primary:hover{background:var(--brand-700);color:#fff}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{color:var(--ink);border-color:var(--brand);box-shadow:var(--sh-1)}
.btn-link{background:none;border:0;padding:0;height:auto;color:var(--ink);font-weight:600}
.btn-link:hover{color:var(--brand)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;border-radius:var(--r-pill);
  font-size:11.5px;font-weight:600;letter-spacing:.02em;
  background:var(--brand-50);color:var(--brand);border:1px solid rgba(244,84,27,.16);
}
.badge-dark{background:rgba(255,255,255,.06);color:rgba(255,255,255,.78);border-color:rgba(255,255,255,.12)}
.badge-accent{background:rgba(18,184,134,.10);color:#0E8F69;border-color:rgba(18,184,134,.24)}
.badge-ink{background:#F1EEE9;color:var(--ink-2);border-color:var(--line)}

/* ============ 阅读进度 ============ */
.read-progress{
  position:fixed;top:0;left:0;height:3px;width:0;background:var(--brand);
  z-index:80;transition:width 120ms linear;
}

/* ============ 面包屑 ============ */
.crumbs{padding:24px 0 0;font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:#C6C0B8}
.crumbs .current{color:var(--ink-3);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头部 ============ */
.article-top{padding:32px 0 0}
.article-top-inner{max-width:820px}
.article-title{
  margin:16px 0 0;
  font-size:clamp(28px,4.4vw,44px);
  font-weight:800;letter-spacing:-.02em;line-height:1.18;
  overflow-wrap:anywhere;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;
  margin:20px 0 0;padding:0 0 24px;font-size:13px;color:var(--ink-3);
  border-bottom:1px solid var(--line);
}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#CFC9C1}

/* ============ 阅读提示卡 ============ */
.note-card{
  max-width:820px;margin:32px 0 0;padding:20px 22px;
  background:var(--brand-50);border-left:4px solid var(--brand);border-radius:0 12px 12px 0;
  font-size:14.5px;color:var(--ink-2);
}
.note-card strong{color:var(--ink)}
.note-card p{margin:0}

/* ============ 正文排版 ============ */
.article-body{
  max-width:820px;margin:40px 0 0;
  font-size:17px;line-height:1.9;color:var(--ink-2);
  overflow-wrap:break-word;word-break:break-word;
}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1em}
.article-body h2{
  position:relative;margin:44px 0 18px;padding-left:16px;
  font-size:24px;font-weight:700;line-height:1.4;color:var(--ink);
}
.article-body h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;background:var(--brand)}
.article-body h3{margin:32px 0 14px;font-size:20px;font-weight:700;color:var(--ink)}
.article-body h4{margin:26px 0 12px;font-size:17px;font-weight:700;color:var(--ink)}
.article-body a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:3px}
.article-body a:hover{color:var(--brand)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding:0}
.article-body ul li{position:relative;padding-left:22px;margin:0 0 .6em}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--brand)}
.article-body ol{counter-reset:cmsli}
.article-body ol li{position:relative;counter-increment:cmsli;padding-left:32px;margin:0 0 .7em}
.article-body ol li::before{
  content:counter(cmsli);position:absolute;left:0;top:.18em;
  width:22px;height:22px;border-radius:6px;background:var(--brand-50);color:var(--brand);
  font-size:12.5px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;background:var(--brand-50);
  border-left:4px solid var(--brand);border-radius:0 12px 12px 0;color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:22px auto;box-shadow:var(--sh-1)}
.article-body figcaption,.article-body .caption{
  display:block;margin-top:-6px;font-size:13px;color:var(--ink-3);text-align:center;
}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;
  background:var(--surface);border-radius:12px;overflow:hidden;box-shadow:var(--sh-1);
}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{background:#F3F0EB;font-weight:700;color:var(--ink);font-size:14px}
.article-body tbody tr:nth-child(even){background:#FBF9F6}
.article-body tbody tr:hover{background:var(--brand-50)}
.article-body hr{border:0;height:1px;background:var(--line);margin:36px 0}
.article-body code{background:#F1EEE9;padding:2px 6px;border-radius:6px;font-size:14.5px;color:var(--brand-700)}

/* ============ 空态 ============ */
.empty-state{
  max-width:820px;margin:48px 0 0;padding:56px 32px;text-align:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);
}
.empty-state .empty-ico{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;background:var(--brand-50);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
}
.empty-state h2{font-size:20px;margin-bottom:8px}
.empty-state p{color:var(--ink-3);font-size:14.5px;margin-bottom:22px}

/* ============ 文末导航 ============ */
.article-foot{max-width:820px;margin:56px 0 0}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pager-card{
  display:flex;gap:14px;align-items:flex-start;
  padding:20px 22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.pager-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--sh-2);color:inherit}
.pager-card.next{justify-content:flex-end;text-align:right}
.pager-label{font-size:12.5px;color:var(--ink-3);margin-bottom:6px}
.pager-title{font-size:15px;font-weight:600;color:var(--ink)}
.pager-ico{color:var(--brand);flex-shrink:0;margin-top:4px}
.pager-actions{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap}

/* ============ 相关推荐 ============ */
.related{margin-top:72px}
.related h3{font-size:20px;margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--sh-2)}
.card h4{font-size:17px;margin:12px 0 8px;line-height:1.45}
.card p{font-size:14.5px;color:var(--ink-3);margin-bottom:16px}
.card .card-meta{font-size:12.5px;color:var(--ink-3);display:flex;align-items:center;gap:8px}
.card-media{width:100%;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#EFEBE5}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t)}
.card:hover .card-media img{transform:scale(1.03)}
.related-empty{color:var(--ink-3);font-size:14.5px}

/* ============ 咨询条 ============ */
.cta-band{
  position:relative;background:var(--dark);color:#fff;border-radius:20px;padding:44px 40px;
  display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;overflow:hidden;
}
.cta-band::before,.cta-band::after{
  content:"";position:absolute;width:22px;height:22px;border:1px solid rgba(244,84,27,.6);
}
.cta-band::before{top:14px;left:14px;border-right:0;border-bottom:0}
.cta-band::after{bottom:14px;right:14px;border-left:0;border-top:0}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,28px);letter-spacing:-.01em}
.cta-band p{color:rgba(255,255,255,.62);font-size:14.5px;margin:10px 0 0;max-width:56ch}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.24)}
.cta-band .btn-ghost:hover{border-color:var(--brand);background:rgba(244,84,27,.12);color:#fff}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);margin-top:96px;padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;margin-bottom:14px}
.footer-brand:hover{color:#fff}
.footer-col p{font-size:14px;color:rgba(255,255,255,.6);margin-bottom:18px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:rgba(255,255,255,.68);font-size:14px}
.footer-col ul li a:hover{color:var(--brand)}
.footer-col ul li{font-size:14px;color:rgba(255,255,255,.6)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:8px 24px;font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ============ 移动底部 Tab ============ */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:var(--surface);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab ul{display:flex}
.mobile-tab li{flex:1}
.mobile-tab a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:var(--tab-h);font-size:10px;color:var(--ink-3);transition:transform var(--t),color var(--t);
}
.mobile-tab a svg{width:22px;height:22px}
.mobile-tab a:active{transform:scale(.94)}
.mobile-tab a.is-active{color:var(--brand)}

/* ============ 滚动进入动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms var(--ease),transform 520ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:1100px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .main-nav{display:none}
  .header-cta{display:none}
  .mobile-tab{display:block}
  body{padding-bottom:76px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{grid-template-columns:1fr;padding:36px 28px}
  .site-footer{margin-top:72px;padding:56px 0 28px}
}
@media (max-width:767px){
  .article-body{font-size:17px;line-height:1.86}
  .article-body h2{font-size:21px;margin-top:36px}
  .article-body h3{font-size:18px}
  .pager{grid-template-columns:1fr}
  .pager-card.next{justify-content:flex-start;text-align:left;flex-direction:row-reverse}
  .related-grid{grid-template-columns:1fr}
}
@media (max-width:519px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .article-title{font-size:clamp(26px,7vw,32px)}
  .article-meta{gap:6px 14px}
  .note-card{padding:18px}
  .cta-band{padding:28px 20px;border-radius:16px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#F4541B;
  --brand-700:#C93F0D;
  --brand-50:#FFF2EC;
  --accent:#12B886;
  --ink:#101114;
  --ink-2:#3B3F47;
  --ink-3:#7A808A;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DB;
  --dark:#0C0D10;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 1px 2px rgba(16,17,20,.04),0 8px 24px rgba(16,17,20,.06);
  --shadow-md:0 2px 6px rgba(16,17,20,.06),0 16px 40px rgba(16,17,20,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;line-height:1.78;color:var(--ink-2);
  background:var(--bg);
  padding-bottom:76px;
  -webkit-font-smoothing:antialiased;
}
@media(min-width:1024px){body{padding-bottom:0}}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
::selection{background:var(--brand-50);color:var(--brand-700)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 18px}
@media(min-width:768px){.container{padding:0 24px}}
@media(min-width:1024px){.container{padding:0 32px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,244,241,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 200ms var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(16,17,20,.08)}
.header-inner{display:flex;align-items:center;gap:16px;height:72px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;font-weight:800;font-size:16px;color:var(--ink);letter-spacing:-.01em}
.logo-mark{
  width:22px;height:22px;border-radius:6px;background:var(--brand);
  position:relative;flex:0 0 auto;
}
.logo-mark::after{content:"";position:absolute;inset:6px;border-radius:2px;background:#fff}
.logo-dot{color:var(--brand);margin:0 3px}
.logo-text{white-space:nowrap}
.main-nav{display:none}
@media(min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
}
.nav-link{
  position:relative;padding:10px 14px;font-size:15px;color:var(--ink-2);
  border-radius:8px;transition:color 200ms var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:center;
  transition:transform 200ms var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.header-cta{margin-left:auto;display:none}
@media(min-width:1024px){.header-cta{display:inline-flex;margin-left:18px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 24px;font-size:15px;font-weight:600;line-height:1;
  border-radius:var(--radius-btn);border:1px solid transparent;cursor:pointer;
  transition:background-color 200ms var(--ease),border-color 200ms var(--ease),color 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(244,84,27,.24)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:var(--brand-700)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.btn-arrow{display:inline-flex;transition:transform 200ms var(--ease)}
.btn:hover .btn-arrow{transform:translateX(4px)}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:11.5px;font-weight:600;letter-spacing:.02em;
  background:var(--brand-50);color:var(--brand-700);border:1px solid rgba(244,84,27,.18);
}
.badge-dark{background:rgba(255,255,255,.06);color:rgba(255,255,255,.82);border:1px solid rgba(255,255,255,.12)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;background:var(--brand-50);
  color:var(--brand-700);font-size:12.5px;font-weight:700;letter-spacing:.06em;
  border:1px solid rgba(244,84,27,.2);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:20px 0 0;font-size:13px;color:var(--ink-3)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb a{color:var(--ink-3);transition:color 180ms var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C9C3BA}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0}
@media(min-width:768px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3.2vw,32px);line-height:1.25;color:var(--ink);font-weight:700;letter-spacing:-.015em}
.section-head p{margin-top:14px;color:var(--ink-3);font-size:15.5px}
.divider{height:1px;background:var(--line);border:0}

/* ---------- Hero ---------- */
.hero{padding:36px 0 8px}
@media(min-width:1024px){.hero{padding:56px 0 16px}}
.hero-grid{display:grid;gap:40px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:64px}}
.hero h1{
  font-size:clamp(30px,5vw,52px);line-height:1.16;font-weight:800;color:var(--ink);
  letter-spacing:-.02em;margin:20px 0 18px;
}
.hero-lead{font-size:16.5px;color:var(--ink-3);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:30px}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;
  color:var(--ink);border-bottom:1px solid rgba(244,84,27,.45);padding-bottom:3px;
  transition:color 200ms var(--ease),border-color 200ms var(--ease);
}
.text-link:hover{color:var(--brand);border-color:var(--brand)}
.hero-metrics{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 20px;
  margin-top:34px;padding-top:26px;border-top:1px solid var(--line);
}
@media(min-width:640px){.hero-metrics{grid-template-columns:repeat(3,minmax(0,1fr))}}
.hero-metrics div{font-size:13.5px;color:var(--ink-3)}
.hero-metrics strong{
  display:block;font-family:"Inter","Noto Sans SC",sans-serif;font-variant-numeric:tabular-nums;
  font-size:17px;font-weight:700;color:var(--ink);margin-bottom:4px;
}
.hero-visual{position:relative}
.hero-visual::before{
  content:"";position:absolute;top:-16px;right:-10px;width:64px;height:64px;
  border-radius:16px;background:var(--brand-50);border:1px solid rgba(244,84,27,.35);
}
@media(min-width:1024px){.hero-visual::before{right:-16px}}
.media-frame{
  position:relative;z-index:1;border-radius:var(--radius-card);overflow:hidden;
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.hero-visual .media-frame{border-color:var(--brand)}
.media-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform 400ms var(--ease)}
.media-frame:hover img{transform:scale(1.03)}
.img-fallback{background:linear-gradient(135deg,#EDE9E3,#DFDAD2)}

/* ---------- 速览卡 ---------- */
.quick-grid{display:grid;gap:20px}
@media(min-width:768px){.quick-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.quick-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.quick-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-md)}
.quick-card .num{
  font-family:"Inter",sans-serif;font-variant-numeric:tabular-nums;font-size:13px;font-weight:700;
  color:var(--brand);letter-spacing:.08em;
}
.quick-card h3{font-size:18px;color:var(--ink);font-weight:700;margin:10px 0 8px}
.quick-card p{font-size:14.5px;color:var(--ink-3);line-height:1.72}

/* ---------- 图文交替 ---------- */
.feature-list{display:grid;gap:64px}
@media(min-width:1024px){.feature-list{gap:96px}}
.feature-row{display:grid;gap:30px;align-items:center}
@media(min-width:1024px){
  .feature-row{grid-template-columns:1fr 1fr;gap:64px}
  .feature-row.reverse .feature-media{order:2}
}
.feature-body h2{
  font-size:clamp(21px,2.6vw,26px);line-height:1.32;color:var(--ink);font-weight:700;
  letter-spacing:-.012em;position:relative;padding-left:16px;
}
.feature-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand);
}
.feature-body p{margin-top:16px;font-size:16px;color:var(--ink-2)}
.list-check{list-style:none;margin-top:22px;display:grid;gap:12px}
.list-check li{position:relative;padding-left:30px;font-size:15.5px;color:var(--ink-2)}
.list-check li::before{
  content:"";position:absolute;left:0;top:6px;width:18px;height:18px;border-radius:5px;
  background:var(--brand-50);border:1px solid rgba(244,84,27,.28);
}
.list-check li::after{
  content:"";position:absolute;left:6px;top:9px;width:6px;height:10px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(40deg);
}
.feature-media{position:relative}
.feature-media .tag{
  position:absolute;z-index:2;top:14px;left:14px;
}

/* ---------- 相关入口卡 ---------- */
.entry-grid{display:grid;gap:20px}
@media(min-width:768px){.entry-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.entry-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.entry-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-md)}
.entry-card h3{font-size:18px;font-weight:700;color:var(--ink);margin:12px 0 10px}
.entry-card p{font-size:14.5px;color:var(--ink-3);line-height:1.7}
.entry-card .more{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.entry-card:hover .more .btn-arrow{transform:translateX(4px)}

/* ---------- 咨询条 CTA ---------- */
.cta-strip{
  background:var(--dark);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-card);
  padding:36px 26px;display:grid;gap:26px;
}
@media(min-width:768px){.cta-strip{padding:48px;grid-template-columns:1fr auto;align-items:center;gap:40px}}
.cta-strip h2{font-size:clamp(22px,2.8vw,28px);color:#fff;font-weight:700;line-height:1.32;letter-spacing:-.012em}
.cta-strip p{color:rgba(255,255,255,.62);font-size:15px;margin-top:12px;max-width:600px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.btn-outline-light{
  background:transparent;border-color:rgba(255,255,255,.24);color:#fff;
}
.btn-outline-light:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#fff;margin-top:56px;padding:64px 0 28px}
@media(min-width:1024px){.site-footer{margin-top:96px;padding:80px 0 32px}}
.footer-grid{display:grid;gap:36px;grid-template-columns:1fr}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:48px}}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;
  margin-bottom:16px;
}
.footer-brand .logo-mark{background:var(--brand)}
.footer-col p{color:rgba(255,255,255,.62);font-size:14px;line-height:1.75;max-width:340px}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:16px}
.footer-col ul{list-style:none;display:grid;gap:11px}
.footer-col ul li{color:rgba(255,255,255,.62);font-size:14px}
.footer-col ul a{color:rgba(255,255,255,.72);font-size:14px;transition:color 180ms var(--ease)}
.footer-col ul a:hover{color:var(--brand)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:10px 24px;
  font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ---------- 移动端底部 Tab ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;
  background:var(--surface);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar a{
  flex:1;height:60px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  font-size:10px;color:var(--ink-3);transition:transform 160ms var(--ease),color 160ms var(--ease);
}
.tabbar a svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tabbar a.is-active{color:var(--brand)}
.tabbar a:active{transform:scale(.94)}
@media(min-width:1024px){.tabbar{display:none}}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.is-visible{opacity:1;transform:none;transition:opacity 520ms var(--ease),transform 520ms var(--ease)}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --brand:#F4541B;
  --brand-700:#C93F0D;
  --brand-50:#FFF2EC;
  --accent:#12B886;
  --ink:#101114;
  --ink-2:#3B3F47;
  --ink-3:#7A808A;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DB;
  --dark-section:#0C0D10;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --shadow-1:0 1px 2px rgba(16,17,20,.04),0 8px 24px rgba(16,17,20,.06);
  --shadow-2:0 2px 4px rgba(16,17,20,.05),0 16px 36px rgba(16,17,20,.11);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:200ms;
  --header-h:72px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--bg);
  color:var(--ink-2);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;border-radius:var(--r-img)}
a{color:var(--ink);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--brand)}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.14;font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(24px,2.6vw,33px);line-height:1.24}
h3{font-size:clamp(18px,1.7vw,21px);line-height:1.36}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:48px}
.section-head p{margin-top:16px;color:var(--ink-3);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-700);
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--brand)}
.lead{font-size:17px;color:var(--ink-2)}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:var(--header-h);
  background:rgba(246,244,241,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(16,17,20,.08);background:rgba(255,255,255,.96)}
.header-inner{display:flex;align-items:center;gap:24px;height:var(--header-h)}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.01em}
.logo:hover{color:var(--ink)}
.logo-mark{width:22px;height:22px;border-radius:7px;background:var(--brand);position:relative;flex:0 0 auto;box-shadow:0 4px 12px rgba(244,84,27,.32)}
.logo-mark::after{content:"";position:absolute;inset:6px 6px auto auto;width:7px;height:7px;border-radius:2px;background:#fff;opacity:.9}
.logo-text{font-size:16px;white-space:nowrap}
.logo-dot{color:var(--brand);margin:0 2px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:10px 14px;border-radius:8px;
  font-size:15px;color:var(--ink-2);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:center;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.header-cta{margin-left:8px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  border:1px solid transparent;background:transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(244,84,27,.24)}
.btn-primary:hover{background:var(--brand-700);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ink)}
.btn-link .arrow{transition:transform var(--dur) var(--ease)}
.btn-link:hover{color:var(--brand)}
.btn-link:hover .arrow{transform:translateX(4px)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:32px}

/* ---------- breadcrumb ---------- */
.crumb{font-size:13px;color:var(--ink-3);display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:22px 0 0}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C3BCB2}
.crumb .current{color:var(--ink-3)}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.09;
}
.page-hero .container{position:relative;z-index:1;padding-top:56px;padding-bottom:72px}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:end}
.hero-copy h1{margin:20px 0 18px}
.hero-copy .lead{max-width:640px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-aside{
  background:var(--brand-50);border:1px solid #F7D9C8;border-radius:var(--r-card);
  padding:24px;
}
.hero-aside h3{font-size:17px;margin-bottom:12px}
.metric-list{display:grid;gap:12px}
.metric-list li{display:flex;justify-content:space-between;gap:12px;font-size:14.5px;border-bottom:1px dashed #EBD4C7;padding-bottom:10px}
.metric-list li:last-child{border-bottom:0;padding-bottom:0}
.metric-list .m-val{font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}

/* ---------- compare table ---------- */
.compare-wrap{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);overflow:auto;-webkit-overflow-scrolling:touch;
}
table.compare-table{width:100%;min-width:780px;border-collapse:separate;border-spacing:0}
.compare-table caption{text-align:left;padding:20px 24px 4px;color:var(--ink-3);font-size:13.5px}
.compare-table th,.compare-table td{padding:16px 20px;text-align:left;font-size:15px;border-bottom:1px solid var(--line);vertical-align:middle}
.compare-table thead th{
  position:sticky;top:0;background:var(--surface);z-index:3;
  font-size:15.5px;color:var(--ink);font-weight:700;
  border-bottom:1px solid var(--line);
}
.compare-table thead th.row-head{left:0;z-index:5}
.compare-table td.row-head,.compare-table th.row-head{
  position:sticky;left:0;background:var(--surface);z-index:2;
  color:var(--ink);font-weight:600;min-width:180px;
  border-right:1px solid var(--line);
}
.compare-table tbody tr:hover td{background:#FFFAF6}
.compare-table tbody tr:hover td.row-head{background:#FFFAF6}
.compare-table th.is-reco,.compare-table td.is-reco{background:var(--brand-50)}
.compare-table tbody tr:hover td.is-reco{background:#FFE7DA}
.compare-table .reco-badge{
  display:inline-block;margin-left:8px;padding:2px 9px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:11px;font-weight:700;vertical-align:middle;
}
.compare-table tbody tr:last-child td{border-bottom:0}
.mark-yes{color:var(--accent);font-weight:700}
.mark-no{color:var(--ink-3)}
.table-note{margin-top:16px;font-size:13.5px;color:var(--ink-3)}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 24px}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;font-size:15px;color:var(--ink-2);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.check-item:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-1)}
.check-item .tick{
  flex:0 0 auto;width:22px;height:22px;border-radius:7px;margin-top:2px;
  background:var(--brand-50);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;
}
.check-item strong{color:var(--ink);font-weight:600}

/* ---------- billing cards ---------- */
.bill-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-2)}
.card h3{margin-bottom:10px}
.card p{font-size:15px;color:var(--ink-2)}
.card .tag{
  display:inline-block;margin-bottom:14px;padding:4px 10px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);font-size:11.5px;font-weight:700;letter-spacing:.03em;
}
.bill-figure{margin-top:32px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);position:relative}
.bill-figure img{width:100%;border-radius:0;aspect-ratio:16/7;object-fit:cover;transition:transform 400ms var(--ease)}
.bill-figure:hover img{transform:scale(1.03)}
.bill-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 20px;
  background:linear-gradient(180deg,rgba(12,13,16,0),rgba(12,13,16,.72));
  color:#fff;font-size:13.5px;
}

/* ---------- detail list ---------- */
.rule-list{display:grid;gap:16px}
.rule-list li{
  display:flex;gap:16px;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:18px 20px;font-size:15px;
}
.rule-list .idx{
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-weight:800;color:var(--brand);font-size:14px;letter-spacing:.02em;
  flex:0 0 auto;padding-top:2px;
}

/* ---------- faq ---------- */
.faq{display:grid;gap:12px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:var(--surface);overflow:hidden}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:18px 56px 18px 20px;
  font-size:16px;font-weight:600;color:var(--ink);
  transition:background var(--dur) var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#FFFAF6}
.faq-item summary::after{
  content:"";position:absolute;right:22px;top:50%;width:12px;height:12px;margin-top:-6px;
  background:
    linear-gradient(var(--brand),var(--brand)) center/12px 2px no-repeat,
    linear-gradient(var(--brand),var(--brand)) center/2px 12px no-repeat;
  transition:transform var(--dur) var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item[open] summary{background:var(--brand-50)}
.faq-body{
  padding:4px 20px 20px 20px;font-size:15.5px;color:var(--ink-2);
  border-left:3px solid var(--brand);background:var(--brand-50);
}
.faq-body p{margin:0}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;background:var(--dark-section);color:#fff;border-radius:20px;
  padding:48px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center;
  border:1px solid rgba(255,255,255,.08);
}
.cta-band h2{color:#fff}
.cta-band p{color:rgba(255,255,255,.66);margin-top:12px;max-width:620px}
.cta-band .btn-primary{flex:0 0 auto}

/* ---------- footer ---------- */
.site-footer{background:var(--dark-section);color:rgba(255,255,255,.72);margin-top:96px;padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:40px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px}
.footer-brand:hover{color:#fff}
.footer-col p{margin-top:14px;font-size:14px;color:rgba(255,255,255,.62);max-width:340px}
.footer-col h4{color:#fff;font-size:14px;letter-spacing:.04em;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col li{font-size:14px;color:rgba(255,255,255,.66)}
.footer-col ul a{color:rgba(255,255,255,.72)}
.footer-col ul a:hover{color:var(--brand)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.badge{display:inline-block;padding:5px 12px;border-radius:999px;font-size:11.5px;font-weight:700}
.badge-dark{background:rgba(255,255,255,.08);color:rgba(255,255,255,.74);border:1px solid rgba(255,255,255,.1)}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:12px 28px;font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:var(--surface);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab ul{display:grid;grid-template-columns:repeat(5,1fr)}
.tab-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:60px;font-size:10px;color:var(--ink-3);
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.tab-item svg{width:22px;height:22px;stroke-width:1.7}
.tab-item:active{transform:scale(.94)}
.tab-item.is-active{color:var(--brand);font-weight:700}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms var(--ease),transform 520ms var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px}
  .main-nav{display:none}
  .header-cta{margin-left:auto}
  .section{padding:72px 0}
  .hero-grid{grid-template-columns:1fr;gap:32px;align-items:start}
  .bill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .cta-band{grid-template-columns:1fr;padding:36px}
  .mobile-tab{display:block}
  body{padding-bottom:76px}
  .site-footer{margin-top:72px;padding-bottom:24px}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:56px 0}
  .check-grid{grid-template-columns:1fr}
  .bill-grid{grid-template-columns:1fr}
  .page-hero .container{padding-top:36px;padding-bottom:48px}
  .section-head{margin-bottom:32px}
  .compare-table th,.compare-table td{padding:14px 16px;font-size:14.5px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .logo-text{font-size:14.5px}
  .header-cta{height:36px;padding:0 12px;font-size:13px}
  .btn{height:46px;padding:0 18px;font-size:14.5px}
  .hero-cta .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 22px;border-radius:16px}
  .cta-band .btn-primary{width:100%}
  .compare-table{min-width:640px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --brand:#F4541B;
  --brand-700:#C93F0D;
  --brand-50:#FFF2EC;
  --accent:#12B886;
  --ink:#101114;
  --ink-2:#3B3F47;
  --ink-3:#7A808A;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DB;
  --dark-section:#0C0D10;
  --danger:#D64545;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --shadow-1:0 1px 2px rgba(16,17,20,.04),0 8px 24px rgba(16,17,20,.06);
  --shadow-2:0 2px 6px rgba(16,17,20,.06),0 18px 44px rgba(16,17,20,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:72px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--header-h);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.78;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
a{color:var(--ink);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand)}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
.num{font-variant-numeric:tabular-nums}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:var(--header-h);
  background:var(--bg);
  border-bottom:1px solid var(--line);
  z-index:120;
  transition:box-shadow .25s var(--ease),background .25s var(--ease);
}
.site-header.is-scrolled{
  background:var(--surface);
  box-shadow:0 1px 2px rgba(16,17,20,.05),0 10px 28px rgba(16,17,20,.07);
}
.header-inner{
  height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:22px;
  height:22px;
  border-radius:7px;
  background:var(--brand);
  position:relative;
  flex-shrink:0;
}
.logo-mark::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:2px;
  background:#fff;
}
.logo-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--ink);
  white-space:nowrap;
}
.logo-dot{color:var(--brand);margin:0 3px}
.main-nav{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--ink-2);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--r-btn);
  font-weight:600;
  font-size:15px;
  padding:0 22px;
  height:46px;
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-700);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-quiet{
  background:none;
  color:var(--ink);
  padding:0;
  height:auto;
  font-weight:600;
  text-decoration:underline;
  text-decoration-color:var(--brand);
  text-underline-offset:5px;
}
.btn-quiet:hover{color:var(--brand)}
.btn-quiet:hover .arrow{transform:translateX(4px)}
.arrow{display:inline-block;transition:transform .2s var(--ease)}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.01em;
  background:var(--brand-50);
  color:var(--brand-700);
  border:1px solid rgba(244,84,27,.16);
}
.badge-plain{background:var(--surface);color:var(--ink-3);border-color:var(--line)}
.badge-ok{background:rgba(18,184,134,.10);color:#0E8F69;border-color:rgba(18,184,134,.22)}
.badge-dark{background:rgba(255,255,255,.08);color:rgba(255,255,255,.78);border-color:rgba(255,255,255,.12)}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-3);
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C6C0B7}
.breadcrumb .current{color:var(--ink-3)}

/* ---------- hero ---------- */
.hero{
  padding:52px 0 72px;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  top:-160px;
  right:-120px;
  width:420px;
  height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(244,84,27,.10),rgba(244,84,27,0) 68%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.18fr .82fr;
  gap:56px;
  align-items:center;
  margin-top:24px;
}
.hero-eyebrow{margin-bottom:20px}
.hero h1{
  font-size:clamp(32px,5vw,58px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
  margin-bottom:20px;
}
.hero-lead{
  font-size:18px;
  color:var(--ink-2);
  max-width:560px;
  margin-bottom:28px;
}
.hero-actions{
  display:flex;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
  margin-bottom:32px;
}
.hero-metrics{
  display:flex;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
  padding-top:24px;
  border-top:1px solid var(--line);
  font-size:14px;
  color:var(--ink-3);
}
.hero-metrics span{display:inline-flex;align-items:center;gap:8px}
.hero-metrics .dot{width:6px;height:6px;border-radius:50%;background:var(--brand)}
.hero-metrics .divider{width:1px;height:16px;background:var(--line)}

.hero-media{
  position:relative;
  border-radius:var(--r-card);
}
.hero-media::after{
  content:"";
  position:absolute;
  top:-14px;
  right:-14px;
  width:64px;
  height:64px;
  border-radius:14px;
  background:var(--brand);
  opacity:.92;
}
.hero-media img{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-card);
  border:1px solid var(--brand);
  z-index:1;
}
.hero-media .img-fallback{
  position:relative;
  z-index:1;
  display:grid;
  place-items:center;
  aspect-ratio:4/3;
  border-radius:var(--r-card);
  border:1px dashed var(--line);
  background:#EDEAE5;
  color:var(--ink-3);
  font-size:14px;
  text-align:center;
  padding:20px;
}

/* ---------- section ---------- */
.section{padding:96px 0}
.section-tight{padding-top:0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{
  font-size:clamp(26px,3.2vw,34px);
  letter-spacing:-.015em;
  margin-bottom:14px;
}
.section-head p{color:var(--ink-3);font-size:16px;margin:0}
.section-head-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:44px;
  flex-wrap:wrap;
}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:8px}
.tl-item{
  position:relative;
  padding-left:96px;
  padding-bottom:48px;
}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";
  position:absolute;
  left:27px;
  top:60px;
  bottom:8px;
  width:2px;
  background:var(--line);
}
.tl-item:last-child::before{display:none}
.tl-item.is-current::before{background:linear-gradient(180deg,var(--brand),var(--brand-50))}
.tl-marker{
  position:absolute;
  left:0;
  top:0;
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--surface);
  border:2px solid var(--line);
  display:grid;
  place-items:center;
  font-weight:800;
  font-size:16px;
  color:var(--ink-3);
  font-variant-numeric:tabular-nums;
  transition:border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.tl-item:hover .tl-marker{
  border-color:var(--brand);
  color:var(--brand);
  box-shadow:0 6px 18px rgba(244,84,27,.16);
}
.tl-item.is-current .tl-marker{
  border-color:var(--brand);
  background:var(--brand);
  color:#fff;
}
.tl-dot{
  position:absolute;
  left:23px;
  top:66px;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--surface);
  border:2px solid var(--brand);
}
.tl-item.is-current .tl-dot{background:var(--brand)}
.tl-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 28px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.tl-item:hover .tl-card{
  border-color:var(--brand);
  box-shadow:var(--shadow-1);
  transform:translateY(-3px);
}
.tl-card h3{
  font-size:20px;
  margin-bottom:8px;
}
.tl-card > p{color:var(--ink-2);margin-bottom:14px}
.tl-points{display:flex;flex-wrap:wrap;gap:10px 24px}
.tl-points li{
  position:relative;
  padding-left:16px;
  font-size:15px;
  color:var(--ink-3);
}
.tl-points li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:6px;
  height:6px;
  border-radius:2px;
  background:var(--brand);
}

/* ---------- cards ---------- */
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.grid-2{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.card:hover{
  border-color:var(--brand);
  box-shadow:var(--shadow-1);
  transform:translateY(-3px);
}
.card h3{font-size:20px;margin:14px 0 10px}
.card p{color:var(--ink-3);font-size:15px;margin-bottom:14px}
.card-tags{display:flex;flex-wrap:wrap;gap:8px}
.card-media{
  border-radius:var(--r-img);
  overflow:hidden;
  margin:-10px -10px 18px;
}
.card-media img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.card:hover .card-media img{transform:scale(1.03)}
.card-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--ink);
  border-bottom:1px solid var(--brand);
  padding-bottom:2px;
}
.card-link:hover{color:var(--brand)}
.card-link:hover .arrow{transform:translateX(4px)}

/* ---------- checklist ---------- */
.checklist{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px 32px;
}
.check-item{
  display:flex;
  gap:14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-img);
  padding:18px 20px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.check-item:hover{border-color:var(--brand);box-shadow:var(--shadow-1)}
.check-icon{
  flex-shrink:0;
  width:22px;
  height:22px;
  border-radius:7px;
  background:rgba(18,184,134,.12);
  display:grid;
  place-items:center;
  margin-top:3px;
}
.check-icon svg{stroke:var(--accent)}
.check-item strong{display:block;color:var(--ink);font-size:16px;margin-bottom:4px}
.check-item span{font-size:14px;color:var(--ink-3);line-height:1.7}

/* ---------- faq ---------- */
.faq-list{
  border-top:1px solid var(--line);
}
.faq-item{
  border-bottom:1px solid var(--line);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  text-align:left;
  padding:22px 4px;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  min-height:56px;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  flex-shrink:0;
  width:26px;
  height:26px;
  border-radius:50%;
  border:1px solid var(--line);
  display:grid;
  place-items:center;
  color:var(--ink-3);
  transition:transform .25s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
  position:relative;
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:2px;
}
.faq-icon::before{width:11px;height:1.6px}
.faq-icon::after{width:1.6px;height:11px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:var(--brand);color:var(--brand)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a-inner{
  padding:2px 4px 24px 18px;
  border-left:3px solid var(--brand);
  background:var(--brand-50);
  border-radius:0 10px 10px 0;
  font-size:15px;
  color:var(--ink-2);
  margin-bottom:18px;
}
.faq-a-inner p{margin:0}
.faq-item.is-open .faq-a{max-height:420px}

/* ---------- dark cta ---------- */
.dark-cta{
  background:var(--dark-section);
  color:rgba(255,255,255,.78);
  border-radius:20px;
  padding:48px;
  position:relative;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.08);
}
.dark-cta::before,
.dark-cta::after{
  content:"";
  position:absolute;
  width:38px;
  height:38px;
  border:1px solid rgba(244,84,27,.6);
}
.dark-cta::before{top:14px;left:14px;border-right:0;border-bottom:0}
.dark-cta::after{bottom:14px;right:14px;border-left:0;border-top:0}
.dark-cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  flex-wrap:wrap;
  position:relative;
  z-index:1;
}
.dark-cta h2{
  color:#fff;
  font-size:clamp(24px,3vw,32px);
  margin-bottom:10px;
}
.dark-cta p{margin:0;color:rgba(255,255,255,.62);max-width:520px;font-size:16px}
.dark-cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-light{
  background:#fff;
  color:var(--ink);
}
.btn-light:hover{background:var(--brand-50);color:var(--brand-700)}
.btn-outline-light{
  background:transparent;
  color:#fff;
  border-color:rgba(255,255,255,.28);
}
.btn-outline-light:hover{border-color:#fff;color:#fff}

/* ---------- footer ---------- */
.site-footer{
  background:var(--dark-section);
  color:rgba(255,255,255,.7);
  padding:72px 0 32px;
  margin-top:96px;
  font-size:15px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-weight:800;
  font-size:17px;
  margin-bottom:16px;
}
.footer-brand:hover{color:#fff}
.footer-col p{
  color:rgba(255,255,255,.55);
  font-size:14px;
  line-height:1.75;
  margin-bottom:18px;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{
  color:rgba(255,255,255,.62);
  font-size:14px;
}
.footer-col ul a:hover{color:var(--brand)}
.footer-col li{
  color:rgba(255,255,255,.55);
  font-size:14px;
  word-break:break-word;
}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 28px;
  padding-top:26px;
  font-size:13px;
  color:rgba(255,255,255,.45);
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  display:none;
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:130;
  background:var(--surface);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  grid-template-columns:repeat(5,1fr);
}
.mobile-tab a{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  height:60px;
  font-size:10px;
  color:var(--ink-3);
  transition:color .18s var(--ease),transform .12s var(--ease);
}
.mobile-tab a:active{transform:scale(.94)}
.mobile-tab a.is-active{color:var(--brand)}
.mobile-tab svg{width:22px;height:22px;stroke-width:1.7}

/* ---------- reveal ---------- */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .container{padding:0 24px}
}
@media (max-width:1023px){
  .main-nav,.header-cta{display:none}
  .mobile-tab{display:grid}
  body{padding-bottom:76px}
  .hero{padding:36px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{order:-1}
  .section{padding:72px 0}
  .section-tight{padding-top:0}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .site-footer{margin-top:72px}
  .checklist{grid-template-columns:1fr}
}
@media (max-width:767px){
  .container{padding:0 18px}
  body{font-size:16px}
  .hero h1{font-size:clamp(28px,8vw,40px)}
  .hero-lead{font-size:16px}
  .hero-metrics{gap:12px;font-size:13px}
  .hero-metrics .divider{display:none}
  .section{padding:56px 0}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .tl-item{padding-left:66px;padding-bottom:32px}
  .tl-item::before{left:20px;top:48px}
  .tl-marker{width:42px;height:42px;font-size:14px}
  .tl-dot{left:17px;top:52px}
  .tl-card{padding:20px}
  .tl-card h3{font-size:18px}
  .dark-cta{padding:32px 24px}
  .dark-cta-actions{width:100%}
  .dark-cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:479px){
  .logo-text{font-size:15px}
  .hero-actions{gap:14px}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --brand:#F4541B;
  --brand-700:#C93F0D;
  --brand-50:#FFF2EC;
  --accent:#12B886;
  --ink:#101114;
  --ink-2:#3B3F47;
  --ink-3:#7A808A;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DB;
  --dark-section:#0C0D10;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:10px;
  --shadow-1:0 1px 2px rgba(16,17,20,.04),0 8px 24px rgba(16,17,20,.06);
  --shadow-2:0 2px 6px rgba(16,17,20,.06),0 16px 36px rgba(16,17,20,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:200ms;
  --container:1200px;
}
*,*::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","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink-2);
  background:var(--bg);
  padding-bottom:0;
}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.2;letter-spacing:-.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:var(--ink);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--brand)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
svg{display:block}
::selection{background:var(--brand-50);color:var(--brand-700)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.94);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(16,17,20,.08);background:rgba(255,255,255,.97)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:22px;height:22px;border-radius:7px;
  background:linear-gradient(135deg,var(--brand),#FF8A4C 55%,var(--brand-700));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.35);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;right:-4px;bottom:-4px;width:9px;height:9px;
  background:var(--ink);border-radius:3px;opacity:.9;
}
.logo-text{font-size:16px;font-weight:800;color:var(--ink);letter-spacing:.01em;white-space:nowrap}
.logo-dot{color:var(--brand);margin:0 2px}
.main-nav{display:none;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:10px 14px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--ink-2);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:center;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--ink);background:rgba(16,17,20,.03)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand)}
.nav-link.is-active::after{transform:scaleX(1)}
.header-cta{flex:0 0 auto;margin-left:12px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn .btn-arrow{transition:transform var(--dur) var(--ease)}
.btn:hover .btn-arrow{transform:translateX(4px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(244,84,27,.24)}
.btn-primary:hover{background:var(--brand-700);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{color:var(--brand-700);border-color:var(--brand)}
.btn-text{height:auto;padding:6px 0;color:var(--brand);font-weight:600}
.btn-text:hover{color:var(--brand-700)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--brand-50);color:var(--brand-700)}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;font-size:11px;font-weight:600;line-height:1.6;
  background:var(--brand-50);color:var(--brand-700);white-space:nowrap;
}
.badge-dark{background:rgba(255,255,255,.08);color:rgba(255,255,255,.78)}
.badge-accent{background:rgba(18,184,134,.12);color:#0B7B59}

/* ============ 面包屑 ============ */
.crumb-wrap{border-bottom:1px solid var(--line);background:var(--surface)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:14px 0;font-size:13px;color:var(--ink-3)}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink-3)}

/* ============ 页面首屏 ============ */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(105deg,rgba(12,13,16,.94) 0%,rgba(12,13,16,.78) 48%,rgba(12,13,16,.52) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center right;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:rgba(255,255,255,.10)
}
.hero-inner{padding:72px 0 76px;max-width:820px;position:relative;z-index:2}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;
  background:rgba(244,84,27,.16);border:1px solid rgba(244,84,27,.45);
  color:#FFC7AF;font-size:12px;font-weight:600;letter-spacing:.04em;margin-bottom:20px;
}
.page-h1{
  font-size:clamp(30px,4.6vw,52px);font-weight:800;letter-spacing:-.02em;line-height:1.14;color:#fff;
  margin-bottom:16px;
}
.hero-lead{font-size:17px;color:rgba(255,255,255,.78);max-width:620px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-note{margin-top:22px;font-size:13px;color:rgba(255,255,255,.55);display:flex;flex-wrap:wrap;gap:10px 18px}
.hero-note span{display:inline-flex;align-items:center;gap:6px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--brand);display:inline-block}

/* ============ 通用板块 ============ */
.section{padding:80px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-dark{background:var(--dark-section);color:rgba(255,255,255,.76)}
.section-dark .sec-title,.section-dark h2,.section-dark h3{color:#fff}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:36px}
.sec-title{font-size:clamp(24px,2.6vw,32px);font-weight:800;letter-spacing:-.015em}
.sec-desc{margin-top:10px;font-size:15px;color:var(--ink-3);max-width:640px}
.section-dark .sec-desc{color:rgba(255,255,255,.6)}

/* ============ 快速定位卡片墙 ============ */
.quick-grid{display:grid;grid-template-columns:1fr;gap:20px}
.quick-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;display:flex;flex-direction:column;gap:12px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.quick-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-1)}
.q-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand-50);color:var(--brand);border:1px solid rgba(244,84,27,.18)
}
.q-title{font-size:17px;font-weight:700;color:var(--ink)}
.q-text{font-size:14.5px;color:var(--ink-3);margin:0}
.q-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;margin-top:auto}
.q-link:hover{color:var(--brand-700)}
.q-link svg{transition:transform var(--dur) var(--ease)}
.q-link:hover svg{transform:translateX(4px)}

/* ============ 主体布局：左内容 右侧栏 ============ */
.layout-grid{display:grid;grid-template-columns:1fr;gap:40px}
.main-col{min-width:0}
.side-col{min-width:0}

/* ============ FAQ 手风琴 ============ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:64px;padding:18px 4px;text-align:left;font-size:16px;font-weight:600;color:var(--ink);
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--ink-3);background:var(--surface);
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--brand);border-color:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease)}
.faq-a-inner{
  margin:0 0 20px;padding:14px 18px;border-left:3px solid var(--brand);
  background:var(--brand-50);border-radius:0 12px 12px 0;font-size:15px;color:var(--ink-2);
}
.faq-item.open .faq-q{color:var(--brand-700)}

/* ============ 侧栏 ============ */
.side-stack{display:flex;flex-direction:column;gap:20px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-1)
}
.side-card h3{font-size:17px;font-weight:700;margin-bottom:6px}
.side-card p{font-size:14px;color:var(--ink-3)}
.side-figure{border-radius:12px;overflow:hidden;border:1px solid var(--line);margin-bottom:16px}
.side-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.guide-list{counter-reset:g;margin-top:14px;display:flex;flex-direction:column;gap:12px}
.guide-list li{position:relative;padding-left:34px;font-size:14.5px;color:var(--ink-2);line-height:1.7}
.guide-list li::before{
  counter-increment:g;content:counter(g,decimal-leading-zero);
  position:absolute;left:0;top:1px;width:24px;height:24px;border-radius:8px;
  background:var(--brand-50);color:var(--brand-700);font-size:11px;font-weight:700;
  display:grid;place-items:center;font-variant-numeric:tabular-nums;
}
.side-cta{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.side-card-dark{background:var(--dark-section);color:rgba(255,255,255,.76);border-color:rgba(255,255,255,.08)}
.side-card-dark h3{color:#fff}
.side-card-dark p{color:rgba(255,255,255,.6)}

/* ============ 数据块 ============ */
.stat-grid{display:grid;grid-template-columns:1fr;gap:20px}
.stat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease)
}
.stat-card:hover{transform:translateY(-3px);border-color:var(--brand)}
.stat-num{font-size:clamp(26px,3vw,36px);font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stat-label{margin-top:6px;font-size:14px;color:var(--ink-3)}
.stat-card .badge{margin-bottom:14px}

/* ============ 相关分类卡片 ============ */
.cat-grid{display:grid;grid-template-columns:1fr;gap:24px}
.cat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)
}
.cat-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-2)}
.cat-media{position:relative;overflow:hidden}
.cat-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 320ms var(--ease)}
.cat-card:hover .cat-media img{transform:scale(1.03)}
.cat-media .badge{position:absolute;top:14px;left:14px;background:var(--surface);color:var(--brand-700)}
.cat-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.cat-body h3{font-size:18px;font-weight:700}
.cat-body p{font-size:14.5px;color:var(--ink-3);margin:0}
.cat-body .q-link{margin-top:auto}

/* ============ 咨询条 ============ */
.cta-band{
  background:var(--dark-section);color:rgba(255,255,255,.78);
  border-radius:20px;padding:36px;position:relative;overflow:hidden;
  border:1px solid rgba(255,255,255,.08);
}
.cta-band::before,.cta-band::after{
  content:"";position:absolute;width:56px;height:56px;border:2px solid var(--brand);opacity:.55
}
.cta-band::before{top:14px;left:14px;border-right:0;border-bottom:0;border-radius:6px 0 0 0}
.cta-band::after{bottom:14px;right:14px;border-left:0;border-top:0;border-radius:0 0 6px 0}
.cta-band-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);font-weight:800;margin-bottom:8px}
.cta-band p{margin:0;font-size:15px;color:rgba(255,255,255,.62);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark-section);color:rgba(255,255,255,.72);margin-top:80px;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px}
.footer-col a:hover{color:var(--brand)}
.footer-col p{font-size:14px;color:rgba(255,255,255,.58);line-height:1.8}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16px;margin-bottom:14px}
.footer-brand:hover{color:#fff}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:8px 24px;font-size:13px;color:rgba(255,255,255,.5)
}

/* ============ 移动底部 Tab ============ */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:grid;grid-template-columns:repeat(5,1fr);
  background:var(--surface);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -6px 20px rgba(16,17,20,.06);
}
.tab-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:60px;font-size:10px;color:var(--ink-3);font-weight:500;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease)
}
.tab-item svg{width:22px;height:22px;stroke-width:1.7}
.tab-item.is-active{color:var(--brand)}
.tab-item:active{transform:scale(.94)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms var(--ease),transform 520ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  body{padding-bottom:calc(76px + env(safe-area-inset-bottom))}
  .container{padding:0 24px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .hero-inner{padding:52px 0 56px}
  .cta-band{padding:26px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
}
@media (min-width:768px){
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(3,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:72px 0}
}
@media (min-width:1024px){
  .main-nav{display:flex}
  .mobile-tab{display:none}
  .quick-grid{grid-template-columns:repeat(4,1fr)}
  .cat-grid{grid-template-columns:repeat(3,1fr)}
  .layout-grid{grid-template-columns:8fr 4fr;gap:44px}
  .side-sticky{position:sticky;top:96px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}
  .section{padding:88px 0}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}