/* roulang page: index */
:root{
  --ink:#0C3A36;--ink-2:#14524C;--ink-3:#1F6B62;
  --copper:#B2703A;--copper-d:#925A2C;--mint:#57C9A5;
  --paper:#F7F5F1;--paper-2:#EFEBE4;--card:#FFFFFF;--line:#E3DED5;
  --text:#141A18;--text-2:#55605C;--text-3:#8A938F;--deep:#0A1513;
  --radius:2px;--shadow-1:0 1px 2px rgba(12,54,52,.05);--shadow-2:0 10px 28px rgba(12,54,52,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
  --sec-y:110px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--text);font-family:var(--font-sans);
  font-size:16px;line-height:1.85;font-weight:400;letter-spacing:.002em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--radius);}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(32px,4.4vw,56px);line-height:1.12;}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.2;}
h3{font-size:20px;line-height:1.35;font-weight:600;}
h4{font-size:17px;line-height:1.45;font-weight:600;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;}

.container{max-width:1200px;padding-left:32px;padding-right:32px;margin:0 auto;width:100%;}
@media (min-width:1400px){.container{max-width:1280px;}}
@media (max-width:991.98px){.container{padding-left:24px;padding-right:24px;}}
@media (max-width:767.98px){.container{padding-left:16px;padding-right:16px;}}

/* ---------- header ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:1040;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.site-header.is-scrolled{background:rgba(247,245,241,.97);border-bottom-color:var(--line);box-shadow:0 1px 0 rgba(227,222,213,.6);}
.nav-wrap{height:84px;display:flex;align-items:center;justify-content:space-between;gap:16px;transition:height .18s var(--ease);}
.site-header.is-scrolled .nav-wrap{height:64px;}
.nav-side{display:flex;align-items:center;gap:30px;}
.nav-side.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink);padding:6px 0;
  display:inline-flex;align-items:center;min-height:44px;
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:14px;height:1px;background:var(--copper);
  transition:left .18s var(--ease),right .18s var(--ease);
}
.nav-link:hover::after{left:0;right:0;}
.nav-link.active{font-weight:700;}
.nav-link.active::before{
  content:"";width:5px;height:5px;border-radius:50%;background:var(--copper);margin-right:8px;flex:0 0 auto;
}
.nav-brand{
  font-family:var(--font-sans);font-size:22px;font-weight:700;color:var(--ink);
  letter-spacing:.06em;line-height:1;display:inline-flex;align-items:baseline;gap:2px;
  padding:6px 4px;white-space:nowrap;
}
.nav-brand .brand-tail{font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--copper);}
.nav-toggle{
  display:none;background:transparent;border:1px solid var(--line);border-radius:var(--radius);
  width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}
.nav-toggle span{transition:transform .18s var(--ease),opacity .18s var(--ease);}
@media (max-width:991.98px){
  .nav-side{display:none;}
  .nav-toggle{display:flex;}
  .nav-wrap{height:64px;}
}
.mobile-drawer{
  position:fixed;top:64px;left:0;right:0;bottom:0;background:var(--paper);z-index:1039;
  padding:24px 16px calc(24px + env(safe-area-inset-bottom));
  display:none;flex-direction:column;
}
.mobile-drawer.collapse{display:none;}
.mobile-drawer.collapse.show{display:flex;}
.mobile-drawer .drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;font-size:16px;font-weight:500;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-drawer .drawer-link.active{color:var(--copper);font-weight:700;}
.mobile-drawer .drawer-link::after{content:"→";font-size:15px;color:var(--text-3);}
.drawer-cta{margin-top:auto;padding-top:24px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius);font-weight:600;letter-spacing:.02em;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:all .18s var(--ease);text-align:center;
}
.btn-primary{background:var(--copper);color:#fff;height:48px;padding:0 26px;}
.btn-primary:hover{background:var(--copper-d);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(146,90,44,.24);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);height:48px;padding:0 24px;}
.btn-ghost:hover{background:rgba(12,54,52,.06);color:var(--ink);}
.btn-nav{height:40px;padding:0 18px;font-size:14px;margin-left:6px;}
.btn-block{width:100%;}

/* ---------- hero ---------- */
.hero{
  position:relative;padding:150px 0 88px;background:var(--paper);overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(1100px 520px at 88% 8%,rgba(31,107,98,.10),transparent 62%),
             radial-gradient(760px 420px at 4% 92%,rgba(178,112,58,.08),transparent 64%);
}
.hero .container{position:relative;z-index:1;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.1em;
  color:var(--ink-3);border:1px solid var(--line);background:var(--card);
  border-radius:999px;padding:6px 14px;margin-bottom:22px;text-transform:uppercase;
}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--mint);display:block;}
.hero-title{margin-bottom:22px;}
.hero-title em{font-style:normal;color:var(--copper);}
.hero-sub{font-size:17px;color:var(--text-2);max-width:36em;margin-bottom:32px;line-height:1.8;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:44px;}
.trust-bar{display:flex;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:22px;}
.trust-item{flex:1 1 0;min-width:120px;padding-right:18px;border-right:1px solid var(--line);}
.trust-item:last-child{border-right:0;padding-right:0;}
.trust-item:not(:first-child){padding-left:18px;}
.trust-item .t-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:22px;font-weight:700;color:var(--ink);line-height:1.2;}
.trust-item .t-label{font-size:13px;color:var(--text-3);line-height:1.5;}
.hero-visual{position:relative;padding-left:24px;}
.hero-visual .hero-img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--paper-2);
}
.float-card{
  position:absolute;left:-6px;bottom:-26px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow-2);min-width:206px;
}
.float-card .f-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:5px 0;}
.float-card .f-row + .f-row{border-top:1px solid var(--line);}
.float-card .f-k{font-size:13px;color:var(--text-3);}
.float-card .f-v{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;color:var(--ink);}
.float-card .f-v.accent{color:var(--copper);}
@media (max-width:991.98px){
  .hero{padding:118px 0 72px;}
  .hero-visual{padding-left:0;margin-top:44px;}
  .float-card{left:16px;bottom:-20px;}
}
@media (max-width:575.98px){
  .trust-item{flex:0 0 50%;border-right:0;padding:0 0 14px 0;}
  .trust-item:not(:first-child){padding-left:0;}
  .trust-bar{padding-top:16px;}
}

/* ---------- data band ---------- */
.databand{background:var(--ink);color:#fff;padding:56px 0;}
.databand .db-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.databand .db-item{padding:0 28px;border-right:1px solid rgba(255,255,255,.14);}
.databand .db-item:first-child{padding-left:0;}
.databand .db-item:last-child{border-right:0;padding-right:0;}
.databand .db-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(28px,3vw,40px);font-weight:700;color:#fff;line-height:1.1;}
.databand .db-num span{font-size:15px;font-weight:600;color:var(--mint);margin-left:6px;}
.databand .db-label{font-size:13px;color:rgba(255,255,255,.66);margin-top:8px;line-height:1.6;}
@media (max-width:767.98px){
  .databand .db-grid{grid-template-columns:repeat(2,1fr);gap:28px 0;}
  .databand .db-item{padding:0 20px 0 0;border-right:0;}
  .databand .db-item:nth-child(odd){border-right:1px solid rgba(255,255,255,.14);}
  .databand .db-item:nth-child(3),.databand .db-item:nth-child(4){padding-top:0;}
}

/* ---------- section basics ---------- */
.section{padding:var(--sec-y) 0;}
.section-head{max-width:640px;margin-bottom:52px;}
.section-head .eyebrow{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:13px;font-weight:600;color:var(--copper);
  letter-spacing:.12em;display:block;margin-bottom:14px;
}
.section-head p{color:var(--text-2);font-size:16px;margin-top:16px;}
.rule{height:1px;background:var(--line);border:0;margin:0;}
@media (max-width:767.98px){:root{--sec-y:64px;}.section-head{margin-bottom:34px;}}

/* ---------- steps ---------- */
.steps-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;}
.steps-lead h2{margin-bottom:18px;}
.steps-lead p{color:var(--text-2);font-size:15.5px;}
.steps-lead .text-link{display:inline-block;margin-top:22px;font-size:15px;font-weight:600;color:var(--ink);position:relative;}
.text-link::after{content:"";position:absolute;left:0;bottom:-3px;height:1px;width:100%;background:var(--copper);transform:scaleX(.28);transform-origin:left;transition:transform .18s var(--ease);}
.text-link:hover::after{transform:scaleX(1);}
.step-item{display:flex;gap:24px;padding:26px 0;border-bottom:1px dashed var(--line);}
.step-item:last-child{border-bottom:0;}
.step-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:34px;font-weight:700;color:var(--copper);line-height:1;flex:0 0 64px;}
.step-body h3{margin-bottom:10px;}
.step-body p{color:var(--text-2);font-size:15px;margin:0;}
.step-item.offset{margin-left:32px;}
@media (max-width:991.98px){
  .steps-grid{grid-template-columns:1fr;gap:36px;}
  .step-item.offset{margin-left:0;}
}
@media (max-width:575.98px){
  .step-num{flex:0 0 48px;font-size:26px;}
  .step-item{gap:16px;}
}

/* ---------- cases ---------- */
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:56px 0;border-top:1px solid var(--line);}
.case-row:first-of-type{border-top:0;padding-top:0;}
.case-row.reverse .case-media{order:2;}
.case-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line);background:var(--paper-2);}
.case-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:14px;}
.case-tag i{width:6px;height:6px;border-radius:50%;background:var(--mint);display:block;}
.case-body h3{margin-bottom:14px;}
.case-body p{color:var(--text-2);font-size:15px;max-width:34em;}
.case-metric{margin-top:22px;display:flex;align-items:baseline;gap:12px;}
.case-metric .m-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:28px;font-weight:700;color:var(--copper);line-height:1;}
.case-metric .m-label{font-size:13px;color:var(--text-3);}
@media (max-width:991.98px){
  .case-row{grid-template-columns:1fr;gap:26px;padding:40px 0;}
  .case-row.reverse .case-media{order:0;}
}

/* ---------- news ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.news-head h2{margin-bottom:0;}
.news-head .text-link{font-size:15px;font-weight:600;color:var(--ink);position:relative;padding-bottom:4px;}
.news-card{
  display:flex;flex-direction:column;height:100%;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#D6D0C5;}
.news-media{background:var(--paper-2);overflow:hidden;}
.news-media img{width:100%;object-fit:cover;transition:transform .4s var(--ease);}
.news-card-lg .news-media img{aspect-ratio:16/10;}
.news-card-sm .news-media img{aspect-ratio:16/10;}
.news-card:hover .news-media img{transform:scale(1.03);}
.news-body{padding:22px;display:flex;flex-direction:column;flex:1 1 auto;}
.chip{
  display:inline-block;font-size:13px;line-height:1.4;color:var(--ink-3);border:1px solid var(--line);
  border-radius:999px;padding:3px 12px;background:var(--paper);align-self:flex-start;margin-bottom:14px;
}
.news-body h3{margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body p{color:var(--text-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:18px;}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:16px;border-top:1px solid var(--line);}
.news-meta .n-date{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--text-3);}
.news-meta .more{font-size:13px;font-weight:600;color:var(--copper);}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius);background:var(--card);
  padding:48px 24px;text-align:center;
}
.empty-skeleton{width:120px;height:64px;background:var(--paper-2);border-radius:var(--radius);margin:0 auto 20px;}
.empty-title{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.empty-sub{font-size:14px;color:var(--text-3);}
.empty-sub a{color:var(--copper);font-weight:600;}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;}
.faq-aside h2{margin-bottom:16px;}
.faq-aside p{color:var(--text-2);font-size:15px;margin-bottom:20px;}
.faq-accordion .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;}
.faq-accordion .accordion-header{margin:0;}
.faq-accordion .accordion-button{
  background:transparent;border:0;box-shadow:none;padding:22px 0 22px 0;font-size:17px;font-weight:600;
  color:var(--ink);line-height:1.5;position:relative;transition:color .18s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--ink);padding-left:18px;}
.faq-accordion .accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;background:var(--copper);
}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--copper);outline-offset:2px;}
.faq-accordion .accordion-button::after{
  content:"+";font-family:var(--font-mono);font-size:20px;font-weight:400;color:var(--copper);
  background-image:none;width:auto;height:auto;margin-left:auto;padding-left:20px;line-height:1;
  transition:transform .18s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"−";transform:none;}
.faq-accordion .accordion-body{padding:0 0 24px;font-size:15px;color:var(--text-2);line-height:1.8;max-width:62em;}
.faq-accordion .accordion-body{padding-left:0;}
.faq-accordion .accordion-button:not(.collapsed) + .accordion-collapse .accordion-body{padding-left:18px;}
@media (max-width:991.98px){.faq-grid{grid-template-columns:1fr;gap:32px;}}

/* ---------- CTA ---------- */
.cta-band{background:var(--deep);color:#fff;padding:88px 0;border-top:1px solid var(--copper);}
.cta-grid{display:grid;grid-template-columns:7fr 5fr;gap:64px;}
.cta-left h2{color:#fff;margin-bottom:16px;}
.cta-left .cta-lead{color:rgba(255,255,255,.68);font-size:15px;margin-bottom:32px;max-width:32em;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px;}
.form-field{display:flex;flex-direction:column;}
.form-field label{font-size:13px;color:rgba(255,255,255,.56);margin-bottom:4px;letter-spacing:.02em;}
.form-field input,.form-field select,.form-field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.24);
  border-radius:0;color:#fff;font-family:inherit;font-size:16px;height:48px;padding:0 2px;
  transition:border-color .18s var(--ease);
}
.form-field textarea{height:48px;padding-top:14px;resize:none;}
.form-field select option{color:#141A18;}
.form-field input::placeholder,.form-field textarea::placeholder{color:rgba(255,255,255,.32);}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{
  border-bottom-color:var(--copper);outline:2px solid var(--copper);outline-offset:3px;
}
.form-privacy{font-size:13px;color:rgba(255,255,255,.46);margin-top:16px;line-height:1.7;}
.cta-points{list-style:none;padding:0;margin:0;}
.cta-points li{display:flex;gap:20px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.12);}
.cta-points li:first-child{padding-top:0;}
.cta-points .p-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:15px;font-weight:700;color:var(--copper);flex:0 0 32px;line-height:1.7;}
.cta-points .p-txt{font-size:15px;color:rgba(255,255,255,.82);line-height:1.75;}
@media (max-width:991.98px){
  .cta-band{padding:64px 0;}
  .cta-grid{grid-template-columns:1fr;gap:44px;}
}
@media (max-width:575.98px){
  .form-row{grid-template-columns:1fr;gap:20px;}
}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:#fff;padding:72px 0 32px;border-top:1px solid rgba(255,255,255,.08);}
.footer-brand{text-align:center;margin-bottom:34px;}
.footer-brand .f-logo{font-size:24px;font-weight:700;letter-spacing:.06em;color:#fff;display:inline-flex;align-items:baseline;gap:2px;}
.footer-brand .f-logo .brand-tail{font-size:11px;color:var(--copper);letter-spacing:.16em;}
.footer-brand .f-desc{font-size:13px;color:rgba(255,255,255,.5);margin-top:12px;}
.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;max-width:840px;margin:0 auto 48px;}
.footer-col h4{color:#fff;font-size:14px;letter-spacing:.08em;margin-bottom:16px;font-weight:600;}
.footer-col a{display:block;font-size:15px;color:rgba(255,255,255,.7);padding:7px 0;}
.footer-col a:hover{color:var(--copper);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding-top:24px;display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.44);
}
.footer-bottom .fb-meta{display:flex;flex-wrap:wrap;gap:8px 20px;}
@media (max-width:767.98px){
  .footer-links{grid-template-columns:1fr;gap:8px;}
  .footer-col{padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.08);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* ---------- reveal & mobile cta ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
.mobile-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:1050;padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(247,245,241,.97);border-top:1px solid var(--line);
  transform:translateY(110%);transition:transform .18s var(--ease);display:none;
}
.mobile-cta.is-on{transform:none;}
@media (max-width:991.98px){.mobile-cta{display:block;}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --ink:#0C3A36; --ink-2:#14524C; --ink-3:#1F6B62;
  --copper:#B2703A; --copper-d:#925A2C;
  --mint:#57C9A5;
  --paper:#F7F5F1; --paper-2:#EFEBE4;
  --card:#FFFFFF; --line:#E3DED5;
  --text:#141A18; --text-2:#55605C; --text-3:#8A938F;
  --deep:#0A1513;
  --r:2px;
  --sh-1:0 1px 2px rgba(12,54,52,.05);
  --sh-2:0 10px 28px rgba(12,54,52,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--ink-2);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--copper);}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;}
::selection{background:rgba(178,112,58,.22);}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1030;
  background:transparent;
  transition:background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(247,245,241,.96);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom-color:var(--line);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:84px;
  transition:height .3s var(--ease);
}
.site-header.is-stuck .nav-wrap{height:64px;}
.nav-side{display:flex;align-items:center;gap:28px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:44px;
  font-size:15px;font-weight:500;color:var(--ink);
  letter-spacing:.01em;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:8px;
  width:0;height:1px;background:var(--copper);
  transform:translateX(-50%);
  transition:width .18s var(--ease);
}
.nav-link:hover{color:var(--ink-3);}
.nav-link:hover::after{width:100%;}
.nav-link.active{font-weight:700;}
.nav-link.active::before{
  content:"";position:absolute;left:-12px;top:50%;
  width:5px;height:5px;border-radius:50%;
  background:var(--copper);transform:translateY(-50%);
}
.brand-logo{
  display:inline-flex;align-items:baseline;justify-content:center;
  font-size:23px;font-weight:700;letter-spacing:.06em;color:var(--ink);
  padding:0 12px;
}
.brand-logo .brand-tail{font-size:.66em;color:var(--copper);letter-spacing:.08em;margin-left:1px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;border:1px solid var(--line);
  border-radius:var(--r);background:var(--card);color:var(--ink);
  align-items:center;justify-content:center;font-size:17px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;
  height:48px;padding:0 26px;
  font-family:var(--font-cn);font-size:15px;font-weight:600;letter-spacing:.02em;
  border-radius:var(--r);border:1px solid transparent;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:active{transform:translateY(0);}
.btn-primary{background:var(--copper);border-color:var(--copper);color:#fff;}
.btn-primary:hover{background:var(--copper-d);border-color:var(--copper-d);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(178,112,58,.28);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:rgba(12,54,52,.06);color:var(--ink);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-nav{height:40px;padding:0 18px;font-size:14px;margin-left:4px;}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;top:0;left:0;right:0;bottom:0;z-index:1060;
  background:var(--paper);
  transform:translateX(100%);
  transition:transform .3s var(--ease);
  display:flex;flex-direction:column;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{
  display:flex;align-items:center;justify-content:center;
  position:relative;height:64px;border-bottom:1px solid var(--line);
}
.drawer-close{
  position:absolute;right:16px;top:50%;transform:translateY(-50%);
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r);
  background:var(--card);color:var(--ink);font-size:16px;
}
.drawer-nav{padding:8px 16px;flex:1;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;font-size:16px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer-nav a i{color:var(--text-3);font-size:13px;}
.drawer-foot{padding:16px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}
.drawer-backdrop{
  position:fixed;inset:0;background:rgba(10,21,19,.45);z-index:1050;
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.drawer-backdrop.is-open{opacity:1;visibility:visible;}

/* ============ 文章头部 ============ */
main{padding-top:84px;}
.article-hero{
  position:relative;
  padding:44px 0 56px;
  background:
    linear-gradient(rgba(247,245,241,.95),rgba(247,245,241,.99)),
    url(/assets/images/backpic/back-1.png) center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.status-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;
  padding:10px 0 22px;
  font-size:13px;color:var(--text-2);
}
.status-bar .sb-live{display:inline-flex;align-items:center;gap:8px;color:var(--ink);font-weight:600;}
.status-bar .dot{
  width:7px;height:7px;border-radius:50%;background:var(--mint);
  box-shadow:0 0 0 4px rgba(87,201,165,.18);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(87,201,165,.18);}50%{box-shadow:0 0 0 7px rgba(87,201,165,.05);}}
.status-bar .sb-item{position:relative;padding-left:16px;}
.status-bar .sb-item::before{content:"";position:absolute;left:0;top:50%;width:1px;height:12px;background:var(--line);transform:translateY(-50%);}
.breadcrumb-nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px;}
.breadcrumb-nav a{color:var(--text-2);}
.breadcrumb-nav a:hover{color:var(--copper);}
.breadcrumb-nav .sep{color:var(--line);}
.breadcrumb-nav .current{color:var(--text-3);}
.title-block{max-width:900px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border:1px solid var(--line);border-radius:999px;
  background:var(--card);font-size:13px;color:var(--ink-3);
}
.chip i{font-size:9px;color:var(--copper);}
.article-hero h1{
  margin:18px 0 0;
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.18;
  letter-spacing:-.01em;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  margin-top:22px;font-size:13px;color:var(--text-3);
}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:7px;}
.meta-row .meta-item i{color:var(--copper);font-size:12px;}
.meta-row .meta-item .mono{color:var(--text-2);}

/* ============ 正文 ============ */
.article-main{padding:64px 0 96px;}
.article-shell{
  display:grid;
  grid-template-columns:minmax(0,1fr) 260px;
  gap:64px;
  align-items:start;
}
.article-wrap{max-width:760px;}
.article-cover{
  margin-bottom:40px;
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  background:var(--paper-2);
  aspect-ratio:16/9;
}
.article-cover img{width:100%;height:100%;object-fit:cover;}
.article-body{font-size:16px;line-height:1.85;color:var(--text);}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.4em;}
.article-body h2{
  position:relative;
  margin:2.2em 0 .85em;
  padding-left:14px;
  font-size:clamp(21px,2.2vw,27px);
  line-height:1.32;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.26em;bottom:.26em;
  width:3px;background:var(--copper);border-radius:1px;
}
.article-body h3{margin:1.8em 0 .6em;font-size:19px;font-weight:600;color:var(--ink-3);}
.article-body h4{margin:1.5em 0 .5em;font-size:17px;font-weight:600;}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.3em;}
.article-body ul{list-style:square;}
.article-body li{margin:.42em 0;}
.article-body blockquote{
  margin:1.7em 0;padding:20px 22px;
  border-left:3px solid var(--copper);
  background:var(--paper-2);color:var(--text-2);
  border-radius:0 var(--r) var(--r) 0;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r);margin:1.4em 0;}
.article-body a{color:var(--ink-2);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(178,112,58,.5);}
.article-body a:hover{color:var(--copper);}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;
  display:block;overflow-x:auto;white-space:nowrap;
}
.article-body thead th{
  background:var(--ink);color:#fff;font-weight:600;
  padding:12px 16px;text-align:left;border:1px solid var(--ink);
}
.article-body tbody td{padding:12px 16px;border:1px solid var(--line);color:var(--text-2);}
.article-body tbody tr:nth-child(even){background:var(--paper);}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:-.6em;}

.article-empty{
  border:1px solid var(--line);border-radius:var(--r);
  background:var(--card);padding:48px 32px;text-align:center;
}
.article-empty .sk{
  width:64px;height:64px;margin:0 auto 20px;border-radius:var(--r);
  background:var(--paper-2);display:flex;align-items:center;justify-content:center;
  color:var(--ink-3);font-size:24px;font-weight:700;
}
.article-empty h2{font-size:20px;margin-bottom:10px;}
.article-empty p{color:var(--text-2);font-size:15px;margin-bottom:20px;}

.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin:48px 0 0;padding-top:26px;border-top:1px solid var(--line);
}
.tag-row .tag-label{font-size:13px;color:var(--text-3);margin-right:4px;}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;background:var(--card);
  font-size:13px;color:var(--text-2);
}
.tag:hover{border-color:var(--ink-3);color:var(--ink);}

.back-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--ink);
  min-height:44px;padding:0 2px;
  position:relative;
}
.link-arrow::after{
  content:"";position:absolute;left:2px;bottom:10px;width:0;height:1px;
  background:var(--copper);transition:width .18s var(--ease);
}
.link-arrow:hover::after{width:calc(100% - 4px);}
.link-arrow i{font-size:12px;color:var(--copper);}

/* 侧栏 */
.article-aside{position:sticky;top:100px;display:flex;flex-direction:column;gap:24px;}
.aside-card{
  border:1px solid var(--line);border-radius:var(--r);background:var(--card);
  padding:22px;box-shadow:var(--sh-1);
}
.aside-card h3{font-size:15px;margin-bottom:14px;letter-spacing:.02em;}
.aside-list{list-style:none;padding:0;margin:0;}
.aside-list li{border-top:1px solid var(--line);}
.aside-list li:first-child{border-top:0;}
.aside-list a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:44px;font-size:14px;color:var(--text-2);
}
.aside-list a:hover{color:var(--copper);}
.aside-list a i{font-size:11px;color:var(--text-3);}
.aside-note{font-size:13px;color:var(--text-3);line-height:1.75;margin:0;}
.aside-note .mono{color:var(--ink-3);}

/* ============ 相关推荐 ============ */
.related{padding:0 0 96px;}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:36px;
}
.section-head h2{font-size:clamp(22px,2.4vw,30px);}
.section-head .head-sub{font-size:14px;color:var(--text-2);margin:8px 0 0;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;
  border:1px solid var(--line);border-radius:var(--r);background:var(--card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D7D0C4;}
.post-thumb{aspect-ratio:16/10;background:var(--paper-2);overflow:hidden;}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.post-card:hover .post-thumb img{transform:scale(1.03);}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.post-body .chip{align-self:flex-start;margin-bottom:14px;}
.post-body h3{font-size:17px;line-height:1.45;margin-bottom:10px;}
.post-body p{font-size:14px;color:var(--text-2);line-height:1.7;margin-bottom:18px;flex:1;}
.post-foot{
  display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);padding-top:14px;
  font-size:13px;color:var(--text-3);
}
.post-foot .mono{color:var(--text-2);}
.post-foot .read{color:var(--ink-2);font-weight:600;}
.post-foot .read:hover{color:var(--copper);}

/* ============ CTA ============ */
.cta-band{
  background:var(--deep);
  border-top:1px solid var(--copper);
  padding:72px 0;
  color:#fff;
}
.cta-inner{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,32px);line-height:1.3;margin-bottom:14px;}
.cta-band p{color:rgba(255,255,255,.68);font-size:15px;line-height:1.8;margin:0;}
.cta-points{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:16px;}
.cta-points li{display:flex;gap:14px;align-items:flex-start;font-size:15px;color:rgba(255,255,255,.82);line-height:1.7;}
.cta-points .idx{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--copper);padding-top:2px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.42);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff;}

/* ============ 页脚 ============ */
.site-footer{background:var(--deep);color:#fff;padding:72px 0 32px;}
.footer-brand{text-align:center;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12);}
.f-logo{display:inline-block;font-size:24px;font-weight:700;letter-spacing:.06em;color:#fff;}
.f-logo .brand-tail{font-size:.66em;color:var(--copper);letter-spacing:.08em;}
.f-desc{margin:12px 0 0;font-size:13px;color:rgba(255,255,255,.55);}
.footer-links{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;
  padding:44px 0;border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-col h4{font-size:14px;color:#fff;letter-spacing:.04em;margin-bottom:16px;}
.footer-col a{display:block;font-size:15px;color:rgba(255,255,255,.66);padding:7px 0;min-height:44px;line-height:30px;}
.footer-col a:hover{color:var(--copper);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px 28px;
  padding-top:26px;font-size:13px;color:rgba(255,255,255,.48);
}
.fb-meta{display:flex;flex-wrap:wrap;gap:8px 22px;}

/* ============ 移动端固定 CTA ============ */
.mobile-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;
  display:none;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));
  background:rgba(247,245,241,.98);
  border-top:1px solid var(--line);
  transform:translateY(110%);transition:transform .3s var(--ease);
}
.mobile-cta.is-show{transform:translateY(0);}
.mc-text{display:flex;flex-direction:column;line-height:1.35;}
.mc-t{font-size:14px;font-weight:600;color:var(--ink);}
.mc-s{font-size:12px;color:var(--text-3);}
.mobile-cta .btn{height:44px;padding:0 20px;font-size:14px;}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .article-shell{grid-template-columns:minmax(0,1fr);gap:0;}
  .article-wrap{max-width:760px;margin:0 auto;}
  .article-aside{display:none;}
}
@media (max-width:991.98px){
  .container{padding:0 24px;}
  .nav-side{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{grid-template-columns:44px 1fr 44px;height:64px;}
  .brand-logo{font-size:20px;}
  .site-header{background:rgba(247,245,241,.96);border-bottom-color:var(--line);}
  .site-header.is-stuck .nav-wrap{height:60px;}
  main{padding-top:64px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;gap:32px;}
  .footer-links{grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-hero{padding:32px 0 44px;}
  .article-main{padding:48px 0 72px;}
  .related{padding-bottom:72px;}
  .mobile-cta{display:flex;}
}
@media (max-width:767.98px){
  body{font-size:15px;line-height:1.8;}
  .container{padding:0 16px;}
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .footer-links{grid-template-columns:minmax(0,1fr);}
  .status-bar{gap:8px 18px;font-size:12px;}
  .status-bar .sb-item{padding-left:12px;}
  .article-hero h1{font-size:clamp(23px,6vw,30px);}
  .meta-row{gap:8px 18px;}
  .cta-band{padding:56px 0;}
  .article-body table{font-size:14px;}
  .footer-bottom{flex-direction:column;}
  .site-footer{padding:56px 0 96px;}
}
@media (max-width:519.98px){
  .article-hero{padding:24px 0 36px;}
  .breadcrumb-nav{font-size:12px;}
  .mobile-cta .mc-s{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --ink:#0C3A36; --ink-2:#14524C; --ink-3:#1F6B62;
  --copper:#B2703A; --copper-d:#925A2C; --mint:#57C9A5;
  --paper:#F7F5F1; --paper-2:#EFEBE4; --card:#FFFFFF; --line:#E3DED5;
  --text:#141A18; --text-2:#55605C; --text-3:#8A938F;
  --deep:#0A1513;
  --r:2px;
  --sh1:0 1px 2px rgba(12,54,52,.05);
  --sh2:0 10px 28px rgba(12,54,52,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:var(--font-cn);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--copper);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
h1{font-size:clamp(32px,4.4vw,56px);line-height:1.12;font-weight:700;letter-spacing:-.01em;}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.2;font-weight:700;letter-spacing:-.005em;}
h3{font-size:20px;line-height:1.35;font-weight:600;}
h4{font-size:17px;line-height:1.45;font-weight:600;}
p{color:var(--text-2);}
strong{color:var(--text);font-weight:600;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;border-radius:2px;}

.container,.container-fluid{
  width:100%;max-width:1200px;margin:0 auto;
  padding-left:32px;padding-right:32px;
}
@media (min-width:1400px){.container,.container-fluid{max-width:1280px;}}
@media (max-width:992px){.container,.container-fluid{padding-left:24px;padding-right:24px;}}
@media (max-width:576px){.container,.container-fluid{padding-left:16px;padding-right:16px;}}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;border-radius:var(--r);
  font-size:15px;font-weight:600;letter-spacing:.02em;cursor:pointer;
  border:1px solid transparent;transition:all .18s var(--ease);
  text-align:center;line-height:1.2;
}
.btn-primary-x{background:var(--copper);color:#fff;}
.btn-primary-x:hover{background:var(--copper-d);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(178,112,58,.24);}
.btn-primary-x:active{transform:translateY(0);box-shadow:none;}
.btn-ghost-x{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost-x:hover{background:rgba(12,58,54,.06);color:var(--ink);}
.btn-light-x{background:#fff;color:var(--ink);}
.btn-light-x:hover{background:var(--paper-2);color:var(--ink);transform:translateY(-1px);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.btn-ghost-light:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff;}

.link-underline{position:relative;display:inline-block;font-weight:500;color:var(--ink);}
.link-underline::after{
  content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1px;
  background:var(--copper);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.link-underline:hover::after{transform:scaleX(1);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  height:84px;background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),height .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-solid{
  height:64px;background:var(--paper);border-bottom-color:var(--line);
}
.header-inner{
  height:100%;display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;gap:24px;
}
.nav-side{display:flex;align-items:center;gap:34px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink);
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:1px;
  background:var(--copper);transition:left .18s var(--ease),right .18s var(--ease);
}
.nav-link:hover{color:var(--ink-2);}
.nav-link:hover::after{left:0;right:0;}
.nav-link.active{font-weight:700;color:var(--ink);}
.nav-link.active::before{
  content:"";position:absolute;left:-12px;top:50%;width:5px;height:5px;
  border-radius:50%;background:var(--copper);transform:translateY(-50%);
}
.brand{
  font-size:22px;font-weight:700;letter-spacing:.06em;color:var(--ink);
  display:inline-flex;align-items:baseline;line-height:1;
}
.brand .brand-tail{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--copper);margin-left:3px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  background:transparent;border-radius:var(--r);position:relative;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:1px;background:var(--ink);}
.drawer{
  position:fixed;inset:0;background:var(--paper);z-index:1060;
  display:flex;flex-direction:column;transform:translateX(100%);
  transition:transform .3s var(--ease);padding:20px 20px 0;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line);}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--line);background:transparent;
  border-radius:var(--r);font-size:22px;line-height:1;color:var(--ink);
}
.drawer-nav{display:flex;flex-direction:column;padding-top:8px;}
.drawer-link{
  min-height:56px;display:flex;align-items:center;justify-content:space-between;
  font-size:16px;font-weight:500;color:var(--ink);border-bottom:1px solid var(--line);
}
.drawer-link::after{content:"›";color:var(--text-3);font-size:20px;}
.drawer-link.active{font-weight:700;color:var(--copper);}
.drawer-cta{margin:24px 0;width:100%;}
.drawer-foot{margin-top:auto;padding-bottom:28px;font-size:13px;color:var(--text-3);}

/* ---------- 内页 Hero ---------- */
.page-hero{
  position:relative;background:var(--ink);color:#fff;overflow:hidden;
  padding-top:140px;padding-bottom:64px;min-height:340px;
  display:flex;align-items:flex-end;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  opacity:.14;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,58,54,.88) 0%,rgba(12,58,54,.94) 100%);
}
.page-hero .container{position:relative;z-index:2;}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;
  letter-spacing:.14em;color:var(--mint);margin-bottom:18px;
}
.hero-kicker::before{content:"";width:22px;height:1px;background:var(--copper);}
.page-hero h1{color:#fff;max-width:820px;}
.page-hero .hero-sub{
  color:rgba(255,255,255,.82);font-size:17px;line-height:1.8;
  max-width:660px;margin-top:20px;
}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:28px;margin-top:36px;
  padding-top:22px;border-top:1px solid rgba(255,255,255,.16);
}
.hero-meta div{display:flex;flex-direction:column;gap:2px;}
.hero-meta .hm-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:24px;font-weight:700;color:#fff;}
.hero-meta .hm-lab{font-size:13px;color:rgba(255,255,255,.62);}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:20px 0;border-bottom:1px solid var(--line);background:var(--paper);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--copper);}
.crumb .sep{color:var(--text-3);}
.crumb .cur{color:var(--text-3);}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-sm{padding:64px 0;}
@media (max-width:768px){
  .section{padding:60px 0;}
  .section-sm{padding:44px 0;}
}
.sec-head{max-width:760px;}
.sec-label{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;
  letter-spacing:.12em;color:var(--copper);margin-bottom:14px;
  font-family:var(--font-num);
}
.sec-label::before{content:"";width:18px;height:1px;background:var(--copper);}
.sec-head h2{margin-bottom:14px;}
.sec-head p{font-size:16px;line-height:1.85;}

/* ---------- 区块 A：图文交替 ---------- */
.split-block{display:grid;grid-template-columns:55fr 45fr;gap:56px;align-items:center;}
.split-block.reverse .split-media{order:2;}
.split-block.reverse .split-body{order:1;}
.split-media{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;aspect-ratio:4/3;box-shadow:var(--sh1);position:relative;
}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.split-media:hover img{transform:scale(1.03);}
.split-body .chip{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;
  border:1px solid var(--line);border-radius:999px;padding:3px 12px;
  color:var(--text-2);background:#fff;margin-bottom:16px;
}
.split-body .chip::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--mint);}
.split-body h3{margin-bottom:14px;}
.split-body p{margin-bottom:14px;}
.split-body p:last-of-type{margin-bottom:0;}
.split-stat{
  display:flex;align-items:baseline;gap:12px;margin-top:22px;
  padding-top:18px;border-top:1px solid var(--line);
}
.split-stat .sv{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:28px;font-weight:700;color:var(--copper);line-height:1;}
.split-stat .sl{font-size:13px;color:var(--text-3);}
.split-stack{display:grid;gap:88px;}
@media (max-width:992px){
  .split-block{grid-template-columns:1fr;gap:28px;}
  .split-block.reverse .split-media{order:0;}
  .split-block.reverse .split-body{order:0;}
  .split-stack{gap:56px;}
}

/* ---------- 区块 B：要点 2x2 ---------- */
.point-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:0 48px;margin-top:48px;
}
.point{
  padding:26px 0 30px;border-top:1px solid var(--line);
  display:grid;grid-template-columns:56px 1fr;gap:16px;
}
.point .pn{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:15px;font-weight:700;color:var(--copper);letter-spacing:.06em;padding-top:3px;
}
.point h3{font-size:17px;margin-bottom:8px;}
.point p{font-size:15px;line-height:1.8;margin:0;}
@media (max-width:768px){
  .point-grid{grid-template-columns:1fr;gap:0;margin-top:32px;}
  .point{grid-template-columns:44px 1fr;padding:20px 0 22px;}
}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:56px;}
.faq-aside p{font-size:15px;margin-top:14px;}
.faq-aside .faq-contact{
  display:inline-block;margin-top:20px;font-size:14px;font-weight:600;
  color:var(--copper);border-bottom:1px solid var(--copper);padding-bottom:2px;
}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item h3{margin:0;}
.faq-q{
  width:100%;background:transparent;border:0;text-align:left;
  padding:24px 48px 24px 0;position:relative;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--text);
  transition:color .18s var(--ease);line-height:1.5;
}
.faq-q:hover{color:var(--ink-3);}
.faq-q::before{
  content:"";position:absolute;left:-16px;top:26px;bottom:26px;width:3px;
  background:var(--copper);opacity:0;transition:opacity .18s var(--ease);
}
.faq-item.is-open .faq-q{color:var(--ink);}
.faq-item.is-open .faq-q::before{opacity:1;}
.faq-q .ic{
  position:absolute;right:6px;top:50%;width:16px;height:16px;
  transform:translateY(-50%);transition:transform .18s var(--ease);
}
.faq-q .ic::before,.faq-q .ic::after{
  content:"";position:absolute;background:var(--copper);left:50%;top:50%;
}
.faq-q .ic::before{width:16px;height:1px;transform:translate(-50%,-50%);}
.faq-q .ic::after{width:1px;height:16px;transform:translate(-50%,-50%);transition:transform .18s var(--ease);}
.faq-item.is-open .faq-q .ic::after{transform:translate(-50%,-50%) rotate(90deg);}
.faq-a{padding:0 48px 24px 0;font-size:15px;line-height:1.8;color:var(--text-2);display:none;}
.faq-item.is-open .faq-a{display:block;}
@media (max-width:992px){
  .faq-wrap{grid-template-columns:1fr;gap:32px;}
}

/* ---------- CTA 通栏 ---------- */
.cta-band{
  background:var(--deep);color:#fff;border-top:1px solid var(--copper);
  padding:72px 0;
}
.cta-inner{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.cta-inner h2{color:#fff;margin-bottom:14px;}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15px;line-height:1.8;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
.cta-points{display:grid;gap:14px;justify-content:end;}
.cta-points div{display:flex;gap:14px;align-items:baseline;font-size:15px;color:rgba(255,255,255,.82);}
.cta-points .cpn{font-family:var(--font-num);font-variant-numeric:tabular-nums;color:var(--copper);font-weight:700;}
@media (max-width:992px){
  .cta-inner{grid-template-columns:1fr;gap:30px;}
  .cta-actions,.cta-points{justify-content:flex-start;}
}
@media (max-width:576px){
  .cta-actions .btn-x{width:100%;}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:#fff;padding:72px 0 0;}
.footer-brand{text-align:center;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12);}
.f-logo{
  font-size:26px;font-weight:700;letter-spacing:.06em;color:#fff;
  display:inline-flex;align-items:baseline;
}
.f-logo .brand-tail{font-size:13px;letter-spacing:.16em;color:var(--copper);margin-left:3px;}
.f-desc{font-size:13px;color:rgba(255,255,255,.58);margin-top:14px;}
.footer-links{
  display:grid;grid-template-columns:repeat(3,1fr);gap:40px;
  padding:48px 0 56px;
}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:18px;letter-spacing:.04em;}
.footer-col a{
  display:block;font-size:15px;color:rgba(255,255,255,.68);
  padding:6px 0;transition:color .18s var(--ease);
}
.footer-col a:hover{color:var(--copper);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0 28px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom .fb-meta{display:flex;gap:22px;flex-wrap:wrap;}
@media (max-width:992px){
  .footer-links{grid-template-columns:repeat(2,1fr);gap:32px;}
}
@media (max-width:576px){
  .footer-links{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}

/* ---------- 响应式导航 ---------- */
@media (max-width:992px){
  .nav-side{display:none;}
  .header-inner{grid-template-columns:44px 1fr 44px;}
  .nav-toggle{display:flex;}
  .brand{justify-self:center;}
  .site-header{height:64px;background:var(--paper);border-bottom-color:var(--line);}
  .page-hero{padding-top:112px;padding-bottom:48px;min-height:300px;}
}
@media (min-width:993px){.drawer{display:none;}}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
  .split-media:hover img{transform:none;}
}

/* roulang page: category2 */
:root{
  --ink:#0C3A36;
  --ink-2:#14524C;
  --ink-3:#1F6B62;
  --copper:#B2703A;
  --copper-d:#925A2C;
  --mint:#57C9A5;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --card:#FFFFFF;
  --line:#E3DED5;
  --text:#141A18;
  --text-2:#55605C;
  --text-3:#8A938F;
  --deep:#0A1513;
  --radius:2px;
  --shadow-1:0 1px 2px rgba(12,54,52,.05);
  --shadow-2:0 10px 28px rgba(12,54,52,.10);
  --ease:cubic-bezier(.22,1,.36,1);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

/* ---------- Buttons ---------- */
.btn-main,.btn-line,.btn-line-light{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 26px;border-radius:var(--radius);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  cursor:pointer;border:1px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn-main{background:var(--copper);color:#fff}
.btn-main:hover{background:var(--copper-d);transform:translateY(-1px);box-shadow:0 8px 20px rgba(178,112,58,.26);color:#fff}
.btn-main:active{transform:translateY(0);box-shadow:none}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-line:hover{background:rgba(12,58,54,.06);color:var(--ink)}
.btn-line-light{border-color:rgba(255,255,255,.5);color:#fff;background:transparent}
.btn-line-light:hover{border-color:#fff;background:rgba(255,255,255,.10);color:#fff}
.text-link{
  display:inline-block;position:relative;font-size:15px;font-weight:500;color:var(--ink);
}
.text-link::after{
  content:'';position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--copper);
  transition:width .18s var(--ease);
}
.text-link:hover{color:var(--copper)}
.text-link:hover::after{width:100%}

/* ---------- Header / Nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  height:84px;
  transition:height .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-solid{
  height:64px;background:var(--paper);border-bottom-color:var(--line);
  box-shadow:0 1px 0 rgba(12,58,54,.02);
}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;
  height:100%;position:relative;
}
.nav-side{display:flex;align-items:center;gap:28px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{
  position:relative;font-size:15px;font-weight:500;line-height:1;
  padding:10px 0;color:rgba(255,255,255,.86);white-space:nowrap;
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:'';position:absolute;left:50%;bottom:2px;width:0;height:1px;background:var(--copper);
  transform:translateX(-50%);transition:width .18s var(--ease);
}
.nav-link:hover{color:#fff}
.nav-link:hover::after,.nav-link:focus-visible::after{width:100%}
.nav-link.active{color:#fff;font-weight:700}
.nav-link.active::before{
  content:'';position:absolute;left:-11px;top:50%;width:5px;height:5px;border-radius:50%;
  background:var(--copper);transform:translateY(-50%);
}
.site-header.is-solid .nav-link{color:var(--text-2)}
.site-header.is-solid .nav-link:hover{color:var(--ink)}
.site-header.is-solid .nav-link.active{color:var(--ink)}
.nav-logo{
  font-size:22px;font-weight:800;letter-spacing:.02em;line-height:1;
  color:#fff;white-space:nowrap;text-align:center;transition:color .25s var(--ease);
}
.site-header.is-solid .nav-logo{color:var(--ink)}
.brand-tail{font-size:.6em;font-weight:600;color:var(--copper);letter-spacing:.06em;margin-left:2px}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 20px;
  background:var(--copper);color:#fff;font-size:14px;font-weight:600;border-radius:var(--radius);
  white-space:nowrap;transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-cta:hover{background:var(--copper-d);color:#fff;transform:translateY(-1px);box-shadow:0 6px 16px rgba(178,112,58,.3)}
.nav-cta:active{transform:translateY(0);box-shadow:none}
.nav-toggle{
  display:none;position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:44px;height:44px;background:transparent;border:0;padding:0;cursor:pointer;
}
.nav-toggle span{
  display:block;width:22px;height:1.5px;margin:5px auto;background:#fff;
  transition:background .2s var(--ease),transform .2s var(--ease),opacity .2s var(--ease);
}
.site-header.is-solid .nav-toggle span{background:var(--ink)}
body.nav-open .nav-toggle span{background:var(--ink)}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

.mobile-drawer{
  position:fixed;inset:0;background:var(--paper);z-index:1035;
  padding:96px 24px calc(24px + env(safe-area-inset-bottom));
  display:flex;flex-direction:column;
  transform:translateY(-100%);opacity:0;pointer-events:none;
  transition:transform .3s var(--ease),opacity .25s var(--ease);
}
body.nav-open .mobile-drawer{transform:translateY(0);opacity:1;pointer-events:auto}
.drawer-logo{display:block;text-align:center;font-size:22px;font-weight:800;color:var(--ink)}
.drawer-nav{margin-top:32px;border-top:1px solid var(--line)}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;padding:0 4px;font-size:16px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a::after{content:'→';color:var(--text-3);font-size:15px}
.drawer-nav a.active{color:var(--ink);font-weight:700}
.drawer-nav a.active::after{color:var(--copper)}
.drawer-cta{width:100%;margin-top:auto}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;background:var(--ink);overflow:hidden;
  padding:158px 0 72px;min-height:360px;display:flex;align-items:center;
}
.page-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.14;
}
.page-hero .hero-veil{
  position:absolute;inset:0;
  background:rgba(12,58,54,.55);
}
.hero-inner{position:relative;z-index:2;max-width:820px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.82);letter-spacing:.08em;
  border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:5px 14px;
}
.hero-tag::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--mint)}
.page-hero h1{
  margin-top:22px;color:#fff;
  font-size:clamp(30px,4.2vw,50px);line-height:1.14;font-weight:700;letter-spacing:-.01em;
}
.hero-sub{
  margin-top:18px;max-width:660px;
  font-size:16px;line-height:1.85;color:rgba(255,255,255,.82);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* ---------- Breadcrumb ---------- */
.crumb-bar{padding:20px 0 0;background:var(--paper)}
.breadcrumb-nav{font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb-nav a{color:var(--text-2)}
.breadcrumb-nav a:hover{color:var(--copper)}
.breadcrumb-nav .sep{color:var(--line)}
.breadcrumb-nav .current{color:var(--text-3)}

/* ---------- Sections ---------- */
.sec{padding:96px 0}
.sec-tight{padding:72px 0}
.sec-head{max-width:720px}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--copper);font-weight:600;
}
.sec-eyebrow::before{content:'';width:18px;height:1px;background:var(--copper)}
.sec-title{
  margin-top:14px;font-size:clamp(24px,2.6vw,34px);line-height:1.22;font-weight:700;
  color:var(--ink);letter-spacing:-.01em;
}
.sec-desc{margin-top:16px;font-size:16px;line-height:1.85;color:var(--text-2);max-width:680px}

/* ---------- Stat band ---------- */
.stat-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--card)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat-item{padding:40px 28px;border-left:1px solid var(--line)}
.stat-item:first-child{border-left:0;padding-left:0}
.stat-num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3vw,36px);font-weight:600;line-height:1;color:var(--ink);
}
.stat-num em{font-size:.5em;font-style:normal;color:var(--text-3);margin-left:6px;letter-spacing:.04em}
.stat-label{margin-top:12px;font-size:14px;color:var(--text-2);line-height:1.6}

/* ---------- Timeline ---------- */
.timeline-wrap{margin-top:56px}
.tl-track{position:relative;padding-left:56px}
.tl-track::before{
  content:'';position:absolute;left:19px;top:10px;bottom:10px;width:1px;background:var(--line);
}
.tl-item{position:relative;padding-bottom:44px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:'';position:absolute;left:-50px;top:6px;width:15px;height:15px;border-radius:50%;
  background:var(--copper);border:3px solid var(--paper);
}
.tl-num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--copper);
}
.tl-item h3{margin-top:8px;font-size:20px;line-height:1.35;font-weight:600;color:var(--ink)}
.tl-item p{margin-top:8px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:660px}

/* ---------- Compare ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;margin-top:56px}
.cmp-col{padding:32px 40px 8px 0;border-top:1px solid var(--ink)}
.cmp-col + .cmp-col{padding-left:40px;padding-right:0;border-left:1px solid var(--line)}
.cmp-tag{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--copper);border:1px solid var(--line);border-radius:999px;padding:4px 14px;
  background:var(--card);
}
.cmp-col h3{margin-top:20px;font-size:20px;font-weight:600;color:var(--ink);line-height:1.35}
.cmp-col p{margin-top:12px;font-size:15px;line-height:1.85;color:var(--text-2)}
.cmp-list{margin-top:20px}
.cmp-list li{
  position:relative;padding:12px 0 12px 20px;font-size:15px;line-height:1.75;color:var(--text-2);
  border-top:1px solid var(--line);
}
.cmp-list li::before{
  content:'';position:absolute;left:0;top:21px;width:8px;height:1px;background:var(--copper);
}
.cmp-list li strong{color:var(--text);font-weight:600}

/* ---------- Split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:center;margin-top:56px}
.split-media{position:relative}
.split-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--paper-2);
}
.split-media figcaption{margin-top:12px;font-size:13px;color:var(--text-3)}
.scene-block{padding:0 0 28px;border-bottom:1px solid var(--line)}
.scene-block + .scene-block{padding-top:28px}
.scene-block:last-child{border-bottom:0;padding-bottom:0}
.scene-block h3{font-size:20px;font-weight:600;color:var(--ink);line-height:1.35}
.scene-block p{margin-top:10px;font-size:15px;line-height:1.85;color:var(--text-2)}
.scene-meta{
  display:inline-block;margin-top:14px;font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:13px;color:var(--copper);letter-spacing:.04em;
}

/* ---------- FAQ ---------- */
.faq-sec{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px}
.faq-aside .text-link{margin-top:22px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{position:relative;border-bottom:1px solid var(--line)}
.faq-item::before{
  content:'';position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--copper);
  opacity:0;transition:opacity .18s var(--ease);
}
.faq-item:has(.accordion-button[aria-expanded="true"])::before{opacity:1}
.faq-item .accordion-header{margin:0}
.faq-item .accordion-button{
  background:transparent;border:0;border-radius:0;box-shadow:none;
  padding:22px 52px 22px 20px;font-size:17px;font-weight:600;line-height:1.5;color:var(--text);
  transition:color .18s var(--ease);
}
.faq-item .accordion-button:not(.collapsed){color:var(--ink);background:transparent;box-shadow:none}
.faq-item .accordion-button:focus{box-shadow:none;outline:2px solid var(--copper);outline-offset:-2px}
.faq-item .accordion-button::after{
  content:'+';background-image:none;display:flex;align-items:center;justify-content:center;
  width:auto;height:auto;font-size:22px;font-weight:400;color:var(--copper);line-height:1;
  position:absolute;right:20px;top:50%;transform:translateY(-50%);
  transition:transform .18s var(--ease),content .18s var(--ease);
}
.faq-item .accordion-button[aria-expanded="true"]::after{content:'−';transform:translateY(-50%) rotate(180deg)}
.faq-item .accordion-body{padding:0 52px 26px 20px;font-size:15px;line-height:1.8;color:var(--text-2)}
.faq-item .accordion-collapse{border:0}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--deep);color:#fff;padding:88px 0;
  border-top:1px solid var(--copper);position:relative;overflow:hidden;
}
.cta-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:start}
.cta-title{font-size:clamp(22px,2.4vw,30px);line-height:1.25;font-weight:700;color:#fff}
.cta-lead{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.72);max-width:520px}
.cta-form{margin-top:32px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.form-field{margin-bottom:22px}
.form-field label{display:block;font-size:13px;color:rgba(255,255,255,.62);letter-spacing:.04em;margin-bottom:6px}
.form-field input,.form-field select{
  width:100%;height:48px;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.22);
  border-radius:0;padding:0 2px;font-size:16px;color:#fff;outline:none;
  transition:border-color .18s var(--ease);
}
.form-field select option{color:var(--text)}
.form-field input::placeholder{color:rgba(255,255,255,.34)}
.form-field input:focus,.form-field select:focus{border-bottom-color:var(--copper)}
.btn-submit{
  width:100%;height:48px;border:0;border-radius:var(--radius);background:var(--copper);color:#fff;
  font-size:15px;font-weight:600;letter-spacing:.02em;cursor:pointer;margin-top:6px;
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-submit:hover{background:var(--copper-d);transform:translateY(-1px);box-shadow:0 8px 22px rgba(178,112,58,.3)}
.btn-submit:active{transform:translateY(0);box-shadow:none}
.form-note{margin-top:14px;font-size:13px;line-height:1.7;color:rgba(255,255,255,.5)}
.cta-side h3{font-size:17px;font-weight:600;color:#fff;padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,.14)}
.cta-list{margin-top:8px}
.cta-list li{
  display:flex;gap:14px;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.10);
  font-size:15px;line-height:1.75;color:rgba(255,255,255,.76);
}
.cta-num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:13px;
  color:var(--copper);letter-spacing:.08em;padding-top:4px;flex:0 0 auto;
}
.form-ok{
  margin-top:14px;font-size:14px;color:var(--mint);
  border:1px solid rgba(87,201,165,.4);padding:10px 14px;border-radius:var(--radius);
}

/* ---------- Footer ---------- */
.site-footer{background:var(--deep);color:#fff;padding:72px 0 0}
.footer-brand{text-align:center;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}
.f-logo{font-size:24px;font-weight:800;letter-spacing:.02em;color:#fff}
.f-desc{margin-top:12px;font-size:13px;color:rgba(255,255,255,.56)}
.footer-links{
  display:grid;grid-template-columns:repeat(3,1fr);gap:40px;
  padding:48px 0;border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-col h4{
  font-size:14px;font-weight:600;color:#fff;letter-spacing:.06em;
  padding-bottom:14px;margin-bottom:10px;border-bottom:1px solid rgba(255,255,255,.10);
}
.footer-col a{
  display:block;font-size:15px;line-height:1.6;padding:8px 0;color:rgba(255,255,255,.66);
}
.footer-col a:hover{color:var(--copper)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
  padding:26px 0 34px;font-size:13px;color:rgba(255,255,255,.5);
}
.fb-meta{display:flex;flex-wrap:wrap;gap:20px}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .container{padding-left:24px;padding-right:24px}
  .nav-side{gap:20px}
  .split{gap:40px}
}
@media (max-width:991.98px){
  .nav-side{display:none}
  .nav-toggle{display:block}
  .header-inner{grid-template-columns:1fr;justify-items:center}
  .sec{padding:72px 0}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .stat-item{border-left:1px solid var(--line);padding:32px 20px}
  .stat-item:nth-child(2n+1){border-left:0;padding-left:0}
  .stat-item:nth-child(n+3){border-top:1px solid var(--line)}
  .compare-grid{grid-template-columns:1fr}
  .cmp-col{padding:28px 0 4px}
  .cmp-col + .cmp-col{padding-left:0;border-left:0;margin-top:32px}
  .split{grid-template-columns:1fr;gap:32px}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .cta-grid{grid-template-columns:1fr;gap:44px}
  .footer-links{grid-template-columns:1fr 1fr;gap:32px}
  .tl-track{padding-left:44px}
  .tl-track::before{left:15px}
  .tl-item::before{left:-42px}
}
@media (max-width:767.98px){
  body{font-size:15px;line-height:1.8}
  .container{padding-left:16px;padding-right:16px}
  .page-hero{padding:132px 0 56px;min-height:0}
  .hero-actions{gap:10px}
  .hero-actions .btn-main,.hero-actions .btn-line-light{width:100%}
  .sec{padding:56px 0}
  .sec-tight{padding:48px 0}
  .stat-grid{grid-template-columns:1fr}
  .stat-item{border-left:0!important;padding:24px 0}
  .stat-item + .stat-item{border-top:1px solid var(--line)}
  .form-row{grid-template-columns:1fr;gap:0}
  .footer-links{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:10px}
  .faq-item .accordion-button{padding:18px 44px 18px 16px;font-size:16px}
  .faq-item .accordion-body{padding:0 44px 22px 16px}
  .cta-band{padding:64px 0}
  .tl-item h3{font-size:18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --ink:#0C3A36; --ink-2:#14524C; --ink-3:#1F6B62;
  --copper:#B2703A; --copper-d:#925A2C;
  --mint:#57C9A5;
  --paper:#F7F5F1; --paper-2:#EFEBE4;
  --card:#FFFFFF; --line:#E3DED5;
  --text:#141A18; --text-2:#55605C; --text-3:#8A938F;
  --deep:#0A1513;
  --r:2px;
  --sh-1:0 1px 2px rgba(12,54,52,.05);
  --sh-2:0 10px 28px rgba(12,54,52,.10);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:var(--font-sans);font-size:16px;line-height:1.85;
  font-weight:400;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--copper)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;letter-spacing:-0.01em}
h1{font-size:clamp(32px,4.4vw,56px);line-height:1.12}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.2}
h3{font-size:20px;line-height:1.35;font-weight:600}
h4{font-size:17px;line-height:1.4;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--copper);outline-offset:2px;border-radius:var(--r);
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* 容器 */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (min-width:1400px){.container{max-width:1280px}}
@media (max-width:991.98px){.container{padding:0 24px}}
@media (max-width:767.98px){.container{padding:0 16px}}
.row{--bs-gutter-x:24px}
@media (max-width:767.98px){.row{--bs-gutter-x:16px}}

/* 按钮 */
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r);font-size:15px;font-weight:600;
  letter-spacing:.02em;border:1px solid transparent;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn-main{background:var(--copper);color:#fff;border-color:var(--copper)}
.btn-main:hover{background:var(--copper-d);border-color:var(--copper-d);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(178,112,58,.22)}
.btn-main:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:rgba(12,58,52,.06);color:var(--ink)}
.btn-ghost:active{background:rgba(12,58,52,.12)}
.btn-block{width:100%}
.btn-main.on-deep:hover{box-shadow:0 8px 20px rgba(178,112,58,.3)}

/* 头部与导航 */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(247,245,241,.97);
  border-bottom:1px solid var(--line);
  transition:box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 1px 12px rgba(12,54,52,.07)}
.header-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:84px;transition:height .18s var(--ease);
}
.site-header.is-scrolled .header-inner{height:64px}
.nav-side{display:flex;align-items:center;gap:30px}
.nav-left{justify-self:start}
.nav-right{justify-self:end}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  min-height:44px;padding:0 2px;font-size:15px;font-weight:500;color:var(--text-2);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:1px;background:var(--copper);
  transform:scaleX(0);transform-origin:center;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink);font-weight:700}
.nav-link.active::before{
  content:"";position:absolute;left:-13px;top:50%;width:5px;height:5px;margin-top:-2.5px;
  border-radius:50%;background:var(--copper);
}
.nav-link.active::after{transform:scaleX(1)}
.brand{
  justify-self:center;font-size:22px;font-weight:700;letter-spacing:.02em;color:var(--ink);
  display:inline-flex;align-items:baseline;gap:2px;line-height:1;
}
.brand .brand-tail{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--copper)}
.brand:hover{color:var(--ink-2)}
.nav-toggle{
  display:none;justify-self:end;width:44px;height:44px;border:1px solid var(--line);
  border-radius:var(--r);background:transparent;color:var(--ink);cursor:pointer;font-size:16px;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--paper-2)}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:1050;background:var(--paper);
  display:flex;flex-direction:column;padding:20px 20px 28px;
  transform:translateX(100%);visibility:hidden;
  transition:transform .4s var(--ease),visibility .4s;
}
.mobile-drawer.open{transform:translateX(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:center;position:relative;height:52px;border-bottom:1px solid var(--line)}
.drawer-logo{font-size:20px;font-weight:700;color:var(--ink)}
.drawer-logo .brand-tail{font-size:11px;color:var(--copper);letter-spacing:.1em}
.drawer-close{
  position:absolute;right:0;top:4px;width:44px;height:44px;border:1px solid var(--line);
  background:transparent;border-radius:var(--r);color:var(--ink);cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;margin-top:12px;flex:1}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  height:56px;border-bottom:1px solid var(--line);font-size:16px;color:var(--text);
}
.drawer-link i{color:var(--text-3);font-size:13px}
.drawer-link.active{color:var(--ink);font-weight:700}
.drawer-link.active i{color:var(--copper)}
.drawer-cta{margin-top:20px}

/* 内页 Hero */
.page-hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(12,58,54,.90),rgba(9,44,41,.90)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-hero .container{position:relative;z-index:2;padding-top:40px;padding-bottom:64px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:26px;flex-wrap:wrap}
.crumb a{color:rgba(255,255,255,.78)}
.crumb a:hover{color:#fff}
.crumb span.sep{color:rgba(255,255,255,.35)}
.crumb .current{color:rgba(255,255,255,.72)}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.26);font-size:13px;color:rgba(255,255,255,.86);
  letter-spacing:.02em;margin-bottom:20px;
}
.hero-badge::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--mint)}
.page-hero h1{color:#fff;max-width:20ch}
.hero-lead{margin-top:18px;font-size:17px;line-height:1.8;color:rgba(255,255,255,.82);max-width:64ch}
.hero-meta{display:flex;flex-wrap:wrap;gap:0;margin-top:34px}
.hm-item{padding:0 28px;border-left:1px solid rgba(255,255,255,.16)}
.hm-item:first-child{padding-left:0;border-left:0}
.hm-k{display:block;font-size:12px;letter-spacing:.06em;color:rgba(255,255,255,.55);margin-bottom:4px}
.hm-v{display:block;font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:15px;color:#fff}

/* 板块通用 */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.section.alt{background:var(--paper-2)}
.sec-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;
  color:var(--copper);font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--copper)}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:16px;max-width:66ch}

/* 通道速览 */
.ov-media{
  position:relative;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  background:var(--paper-2);
}
.ov-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease)}
.ov-media:hover img{transform:scale(1.03)}
.ov-badge{
  position:absolute;left:16px;bottom:16px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r);padding:10px 14px;font-size:13px;color:var(--text-2);
}
.ov-badge strong{display:block;font-family:var(--font-mono);font-size:18px;color:var(--ink);font-variant-numeric:tabular-nums;font-weight:700}
.ov-points{display:grid;gap:26px}
.ov-point{padding-left:16px;border-left:3px solid var(--copper)}
.ov-point h3{margin-bottom:8px}
.ov-point p{color:var(--text-2);font-size:15px;max-width:60ch}

/* 对照表 */
.cmp-wrap{
  border:1px solid var(--line);border-radius:var(--r);overflow-x:auto;background:var(--card);
}
.cmp-table{width:100%;min-width:860px;border-collapse:collapse}
.cmp-table thead th{
  background:var(--ink);color:#fff;font-size:14px;font-weight:600;letter-spacing:.02em;
  padding:16px 20px;text-align:left;white-space:nowrap;border:0;
}
.cmp-table tbody td{
  padding:20px;font-size:15px;color:var(--text-2);border-top:1px solid var(--line);
  vertical-align:top;
}
.cmp-table tbody tr:nth-child(even){background:var(--paper)}
.cmp-table tbody td:first-child{color:var(--text);font-weight:600}
.cmp-table .num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--ink);font-weight:600}
.cmp-note{margin-top:16px;font-size:13px;color:var(--text-3)}

/* 数据条 */
.stat-band{background:var(--ink);color:#fff;padding:44px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat-item{padding:6px 24px;border-left:1px solid rgba(255,255,255,.14)}
.stat-item:first-child{border-left:0;padding-left:0}
.stat-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:30px;font-weight:700;color:#fff;line-height:1.2}
.stat-num em{font-style:normal;font-size:15px;color:var(--mint);margin-left:6px}
.stat-label{margin-top:6px;font-size:13px;color:rgba(255,255,255,.62)}

/* 三问三答 */
.qa-list{border-top:1px solid var(--line)}
.qa-item{
  display:grid;grid-template-columns:96px 1fr;gap:28px;
  padding:36px 0;border-bottom:1px solid var(--line);
}
.qa-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--copper);letter-spacing:.06em;padding-top:4px}
.qa-body h3{margin-bottom:10px}
.qa-body p{color:var(--text-2);font-size:15px;max-width:70ch}

/* CTA 通栏 */
.cta-band{
  background:var(--deep);color:#fff;border-top:1px solid var(--copper);padding:72px 0;
}
.cta-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;color:var(--copper);font-weight:600;margin-bottom:14px}
.cta-eyebrow::before{content:"";width:18px;height:1px;background:var(--copper)}
.cta-band h2{color:#fff;max-width:16ch}
.cta-band .cta-text{margin-top:14px;color:rgba(255,255,255,.68);font-size:15px;max-width:52ch}
.cta-form{display:grid;gap:22px}
.field-line{
  width:100%;height:48px;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.22);
  border-radius:0;color:#fff;font-size:16px;padding:0 2px;appearance:none;
  transition:border-color .18s var(--ease);
}
.field-line::placeholder{color:rgba(255,255,255,.42)}
.field-line:focus{outline:none;border-bottom-color:var(--copper)}
.field-line:focus-visible{outline:2px solid var(--copper);outline-offset:4px}
select.field-line{background-image:none;cursor:pointer}
select.field-line option{background:var(--deep);color:#fff}
.cta-note{font-size:13px;color:rgba(255,255,255,.5);line-height:1.7}

/* 页脚 */
.site-footer{background:var(--deep);color:#fff;padding:64px 0 28px;font-size:15px}
.footer-brand{text-align:center;max-width:620px;margin:0 auto 48px}
.f-logo{font-size:24px;font-weight:700;letter-spacing:.02em;color:#fff}
.f-logo .brand-tail{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--copper);margin-left:2px}
.f-desc{margin-top:12px;font-size:13px;color:rgba(255,255,255,.6)}
.footer-links{
  display:grid;grid-template-columns:repeat(3,1fr);gap:32px;
  padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12);
  max-width:960px;margin:0 auto;
}
.footer-col h4{color:#fff;font-size:14px;letter-spacing:.04em;margin-bottom:16px}
.footer-col a{display:block;color:rgba(255,255,255,.72);font-size:15px;line-height:2.1}
.footer-col a:hover{color:var(--copper)}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.5);
}
.fb-meta{display:flex;gap:20px;flex-wrap:wrap}
.fb-meta span{color:rgba(255,255,255,.5)}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1199.98px){
  .nav-side{gap:22px}
  .nav-link{font-size:14px}
}
@media (max-width:991.98px){
  .nav-side{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{grid-template-columns:44px 1fr 44px;height:68px}
  .brand{font-size:20px}
  .section{padding:64px 0}
  .section.tight{padding:52px 0}
  .page-hero .container{padding-top:28px;padding-bottom:48px}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .stat-item:nth-child(3){border-left:0;padding-left:0}
  .qa-item{grid-template-columns:72px 1fr;gap:18px}
  .footer-links{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:767.98px){
  body{font-size:15px;line-height:1.8}
  .page-hero .container{padding-bottom:40px}
  .hero-lead{font-size:16px}
  .hero-meta{gap:20px 0}
  .hm-item{padding:0 16px}
  .section{padding:56px 0}
  .ov-points{margin-top:28px}
  .qa-item{grid-template-columns:1fr;gap:8px}
  .cta-band{padding:56px 0}
  .footer-links{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:575.98px){
  .stat-grid{grid-template-columns:1fr;gap:18px 0}
  .stat-item{border-left:0;padding:0 0 14px;border-bottom:1px solid rgba(255,255,255,.12)}
  .stat-item:last-child{border-bottom:0;padding-bottom:0}
  .hm-item{padding-left:0;border-left:0}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}