/* roulang page: index */
:root{
  --brand-900:#0B1F1A;
  --brand-700:#0E3A31;
  --brand-500:#17624F;
  --accent-500:#C6F24E;
  --warm-500:#D2622F;
  --bg-000:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E2E1DA;
  --ink-900:#101614;
  --muted:#5C6A65;
  --radius-lg:18px;
  --radius-sm:14px;
  --radius-btn:999px;
  --radius-badge:6px;
  --shadow-1:0 1px 2px rgba(11,31,26,.05);
  --shadow-2:0 12px 32px -18px rgba(11,31,26,.22);
  --shadow-3:0 28px 60px -30px rgba(11,31,26,.32);
  --ease:cubic-bezier(.22,.61,.36,1);
  --space-section:112px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.9;
  color:var(--ink-900);
  background:var(--bg-000);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.22;color:var(--ink-900);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
svg{display:block;}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:var(--space-section) 0;}
.section-tight{padding:72px 0;}
.eyebrow{
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-500);margin-bottom:16px;display:block;
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px;flex-wrap:wrap;}
.section-head h2{font-size:42px;}
.section-head p{color:var(--muted);max-width:560px;font-size:16px;}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums;letter-spacing:.04em;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:14px 28px;border-radius:var(--radius-btn);
  font-weight:700;font-size:15px;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease),transform .2s var(--ease),box-shadow .28s var(--ease);
  position:relative;overflow:hidden;
}
.btn-primary{background:var(--brand-700);color:#fff;border-color:var(--brand-700);}
.btn-primary:hover{background:var(--accent-500);color:var(--brand-900);border-color:var(--accent-500);box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-ghost:hover{background:#fff;color:var(--brand-900);border-color:#fff;}
.btn-outline{background:transparent;color:var(--brand-700);border-color:var(--brand-700);}
.btn-outline:hover{background:var(--brand-700);color:#fff;}
.btn-sm{min-height:42px;padding:10px 20px;font-size:14px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--brand-700);
}
.link-arrow .arw{transition:transform .3s var(--ease);}
.link-arrow:hover .arw{transform:translateX(4px);}
.link-arrow:hover{color:var(--brand-500);}

.badge{
  display:inline-block;font-size:12px;padding:4px 10px;border-radius:var(--radius-badge);
  background:rgba(198,242,78,.24);color:var(--brand-900);font-weight:500;letter-spacing:.02em;
}
.badge-warm{background:rgba(210,98,47,.12);color:#8A3D14;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.16);
  box-shadow:var(--shadow-1);
  transition:background-color .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header .nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:17px;letter-spacing:-.01em;transition:color .32s var(--ease);}
.logo-mark{width:14px;height:14px;background:var(--accent-500);transform:rotate(45deg);border-radius:2px;flex:0 0 auto;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;padding:10px 14px;font-size:15px;color:rgba(255,255,255,.86);font-weight:500;
  border-radius:var(--radius-btn);transition:color .28s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--accent-500);
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.nav-link:hover,.nav-link.active{color:#fff;}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;background:transparent;border:1px solid rgba(255,255,255,.28);color:#fff;cursor:pointer;
  transition:background-color .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.16);}
.site-header .btn-primary{background:var(--accent-500);color:var(--brand-900);border-color:var(--accent-500);}
.site-header .btn-primary:hover{background:#fff;color:var(--brand-900);border-color:#fff;}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:12px;background:transparent;border:1px solid rgba(255,255,255,.28);
  cursor:pointer;position:relative;
}
.menu-toggle span{position:absolute;left:12px;right:12px;height:2px;background:#fff;border-radius:2px;transition:transform .32s var(--ease),opacity .32s var(--ease);}
.menu-toggle span:nth-child(1){top:18px;}
.menu-toggle span:nth-child(2){top:24px;}
.menu-toggle.is-open span:nth-child(1){transform:translateY(3px) rotate(45deg);}
.menu-toggle.is-open span:nth-child(2){transform:translateY(-3px) rotate(-45deg);}

.site-header.is-solid{
  background:rgba(246,245,241,.94);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-2);
}
.site-header.is-solid .logo{color:var(--ink-900);}
.site-header.is-solid .nav-link{color:var(--muted);}
.site-header.is-solid .nav-link:hover,.site-header.is-solid .nav-link.active{color:var(--brand-900);font-weight:700;}
.site-header.is-solid .icon-btn{border-color:var(--line);color:var(--ink-900);}
.site-header.is-solid .icon-btn:hover{background:rgba(14,58,49,.06);}
.site-header.is-solid .menu-toggle{border-color:var(--line);}
.site-header.is-solid .menu-toggle span{background:var(--ink-900);}

/* mobile drawer */
.drawer-mask{position:fixed;inset:0;background:rgba(11,31,26,.55);opacity:0;visibility:hidden;transition:opacity .32s var(--ease),visibility .32s var(--ease);z-index:70;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(88vw,380px);z-index:80;
  background:rgba(11,31,26,.9);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  transform:translateX(100%);transition:transform .36s var(--ease);
  padding:88px 28px 32px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer a.drawer-link{color:#fff;font-size:22px;font-weight:700;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.12);}
.drawer a.drawer-link.active{color:var(--accent-500);}
.drawer .drawer-foot{margin-top:auto;padding-top:24px;color:rgba(255,255,255,.72);font-size:14px;line-height:2;}
.drawer .btn{margin-top:20px;width:100%;}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:88vh;display:flex;align-items:flex-end;
  padding:150px 0 72px;color:#fff;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(11,31,26,.62) 0%,rgba(11,31,26,.88) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.16;
  background-image:linear-gradient(rgba(255,255,255,.35) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.35) 1px,transparent 1px);
  background-size:88px 88px;
}
.hero .container{position:relative;z-index:2;}
.hero-inner{max-width:880px;}
.hero h1{
  color:#fff;font-weight:900;font-size:64px;line-height:1.12;letter-spacing:-.02em;margin-bottom:24px;
}
.hero h1 em{font-style:normal;color:var(--accent-500);}
.hero-sub{font-size:18px;line-height:1.85;color:rgba(255,255,255,.84);max-width:640px;margin-bottom:36px;}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:52px;}
.hero-stats{display:flex;gap:0;border-top:1px solid rgba(255,255,255,.22);padding-top:24px;flex-wrap:wrap;}
.hero-stat{flex:1 1 160px;padding-right:24px;}
.hero-stat .num{font-family:"IBM Plex Mono",monospace;font-size:28px;font-weight:500;color:var(--accent-500);letter-spacing:.02em;line-height:1.3;}
.hero-stat .lbl{font-size:14px;color:rgba(255,255,255,.7);}
.scroll-cue{
  position:absolute;right:40px;bottom:44px;z-index:2;display:flex;flex-direction:column;align-items:center;gap:12px;
  color:rgba(255,255,255,.7);font-size:12px;letter-spacing:.14em;font-family:"IBM Plex Mono",monospace;
}
.scroll-cue .line{width:1px;height:64px;background:rgba(255,255,255,.3);position:relative;overflow:hidden;}
.scroll-cue .line::after{content:"";position:absolute;left:0;top:-64px;width:100%;height:64px;background:var(--accent-500);animation:cue 2.4s infinite var(--ease);}
@keyframes cue{0%{transform:translateY(0);}100%{transform:translateY(128px);}}

/* ---------- statement band ---------- */
.band{background:var(--bg-000);border-top:1px solid var(--line);}
.band-inner{display:grid;grid-template-columns:1.4fr 1fr;gap:56px;align-items:center;padding:64px 0;}
.band-quote{
  font-family:"Noto Serif SC",serif;font-size:30px;line-height:1.55;letter-spacing:-.01em;color:var(--brand-900);
}
.band-points{display:flex;gap:28px;padding-left:32px;border-left:1px solid var(--line);flex-wrap:wrap;}
.band-point{font-weight:700;font-size:17px;color:var(--brand-700);display:flex;align-items:center;gap:8px;}
.band-point::before{content:"";width:8px;height:8px;background:var(--accent-500);border-radius:2px;transform:rotate(45deg);}

/* ---------- story ---------- */
.story-grid{display:grid;grid-template-columns:5fr 7fr;gap:72px;}
.story-left{position:sticky;top:96px;align-self:start;}
.vertical-tag{
  writing-mode:vertical-rl;font-size:13px;letter-spacing:.3em;color:var(--muted);
  border-left:1px solid var(--line);padding-left:12px;height:120px;margin-bottom:24px;font-family:"IBM Plex Mono",monospace;
}
.story-left h2{font-size:40px;margin-bottom:20px;}
.story-left .lede{color:var(--brand-500);font-size:17px;font-weight:500;}
.story-body p{color:#243330;margin-bottom:22px;font-size:17px;}
.story-body p:last-of-type{margin-bottom:32px;}
.story-figure{margin:0;}
.story-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow-2);}
.story-figure figcaption{font-size:13px;color:var(--muted);margin-top:12px;}

/* ---------- featured cards ---------- */
.featured-grid{display:grid;grid-template-columns:8fr 4fr;gap:32px;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .32s var(--ease),box-shadow .32s var(--ease);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.card-media{overflow:hidden;}
.card-media img{width:100%;object-fit:cover;transition:transform .6s var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-main .card-media img{aspect-ratio:16/9;}
.card-side .card-media img{aspect-ratio:4/5;}
.card-body{padding:26px 24px 28px;}
.card-body .badge{margin-bottom:14px;}
.card-body h3{font-size:24px;margin-bottom:12px;}
.card-side .card-body h3{font-size:20px;}
.card-body p{color:var(--muted);font-size:15px;line-height:1.85;}
.card-stack{display:grid;gap:32px;}
.card:hover h3{text-decoration:underline;text-underline-offset:6px;text-decoration-color:var(--accent-500);text-decoration-thickness:3px;}

/* ---------- news list ---------- */
.news-list{border-top:1px solid var(--line);}
.news-item{
  display:grid;grid-template-columns:160px 1fr auto;gap:28px;align-items:center;
  padding:24px 8px;border-bottom:1px solid var(--line);
  transition:background-color .28s var(--ease),transform .28s var(--ease);
}
.news-item:hover{background:rgba(255,255,255,.72);transform:translateX(4px);}
.news-thumb img{width:160px;height:112px;object-fit:cover;border-radius:var(--radius-sm);}
.news-main h3{font-size:19px;line-height:1.5;margin-bottom:8px;}
.news-item:hover h3{color:var(--brand-500);}
.news-main p{color:var(--muted);font-size:14px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:12px;}
.news-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.news-meta .time{font-family:"IBM Plex Mono",monospace;font-size:13px;color:var(--warm-500);}
.news-go{color:var(--brand-700);transition:transform .3s var(--ease);}
.news-item:hover .news-go{transform:translateX(6px);}
.empty-state{
  min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  color:var(--muted);border-bottom:1px solid var(--line);text-align:center;
}
.empty-state svg{color:var(--brand-500);}

/* ---------- trust ---------- */
.trust{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.trust-grid{display:grid;grid-template-columns:4fr 6fr;gap:64px;align-items:center;}
.trust-nums{display:grid;gap:28px;}
.trust-num .n{font-family:"IBM Plex Mono",monospace;font-size:44px;font-weight:500;color:var(--brand-700);line-height:1.2;}
.trust-num .t{font-size:15px;color:var(--muted);}
.trust-quote{font-family:"Noto Serif SC",serif;font-size:26px;line-height:1.7;color:var(--brand-900);margin-bottom:20px;}
.trust-sign{font-size:14px;color:var(--muted);font-family:"IBM Plex Mono",monospace;letter-spacing:.04em;}
.logo-row{display:grid;grid-template-columns:repeat(6,1fr);border-top:1px solid var(--line);margin-top:64px;}
.logo-cell{
  padding:28px 12px;text-align:center;font-size:14px;color:#9AA5A0;border-right:1px solid var(--line);
  transition:color .28s var(--ease),background-color .28s var(--ease);letter-spacing:.06em;
}
.logo-cell:last-child{border-right:0;}
.logo-cell:hover{color:var(--brand-700);background:rgba(14,58,49,.03);}

/* ---------- cta ---------- */
.cta{background:var(--brand-900);color:#fff;}
.cta-grid{display:grid;grid-template-columns:6fr 6fr;gap:64px;align-items:center;padding:88px 0;}
.cta h2{color:#fff;font-size:40px;margin-bottom:16px;}
.cta p{color:rgba(255,255,255,.72);font-size:16px;}
.cta-form{display:flex;gap:12px;flex-wrap:wrap;}
.cta-form .field{flex:1 1 260px;}
.form-label{display:block;font-size:13px;color:rgba(255,255,255,.66);margin-bottom:8px;}
.form-input{
  width:100%;height:52px;padding:0 18px;border-radius:6px;border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.06);color:#fff;transition:border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.form-input::placeholder{color:rgba(255,255,255,.44);}
.form-input:focus{outline:none;border-color:var(--accent-500);box-shadow:0 0 0 2px rgba(198,242,78,.35);}
.form-input.is-error{border-color:var(--warm-500);box-shadow:0 0 0 2px rgba(210,98,47,.28);}
.form-note{font-size:12px;color:rgba(255,255,255,.55);margin-top:12px;}
.form-msg{font-size:13px;margin-top:10px;min-height:20px;}
.form-msg.ok{color:var(--accent-500);}
.form-msg.err{color:#F0A182;}

/* ---------- 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;gap:28px;text-align:left;background:transparent;border:0;cursor:pointer;
  padding:26px 4px;font-size:19px;font-weight:700;color:var(--ink-900);transition:color .28s var(--ease);
}
.faq-q:hover{color:var(--brand-500);}
.faq-q .idx{font-family:"IBM Plex Mono",monospace;font-size:14px;color:var(--warm-500);flex:0 0 40px;}
.faq-q .sign{margin-left:auto;color:var(--brand-700);transition:transform .32s var(--ease);flex:0 0 auto;}
.faq-item.is-open .faq-q .sign{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
.faq-a p{color:var(--muted);font-size:16px;padding:0 4px 28px 68px;}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.74);border-top:1px solid var(--accent-500);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;gap:40px;padding:72px 0 48px;}
.footer-brand .logo{color:#fff;margin-bottom:18px;}
.footer-brand p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.7);margin-bottom:18px;}
.footer-brand .contact{font-size:14px;line-height:2;color:rgba(255,255,255,.6);}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.02em;position:relative;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.7);transition:color .28s var(--ease);}
.footer-col ul a:hover{color:var(--accent-500);}
.foot-toggle{display:none;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:24px 0;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.55);
}
.footer-bottom a{color:rgba(255,255,255,.7);}
.footer-bottom a:hover{color:var(--accent-500);}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--brand-700);color:#fff;border:0;cursor:pointer;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(10px);z-index:50;
  transition:opacity .32s var(--ease),transform .32s var(--ease),visibility .32s var(--ease),background-color .28s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--accent-500);color:var(--brand-900);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  :root{--space-section:84px;}
  .main-nav{display:none;}
  .menu-toggle{display:block;}
  .nav-actions .btn{display:none;}
  .hero h1{font-size:44px;}
  .section-head h2{font-size:34px;}
  .story-grid{grid-template-columns:1fr;gap:40px;}
  .story-left{position:static;}
  .vertical-tag{display:none;}
  .featured-grid{grid-template-columns:1fr;}
  .trust-grid{grid-template-columns:1fr;gap:40px;}
  .cta-grid{grid-template-columns:1fr;gap:36px;padding:72px 0;}
  .cta h2{font-size:32px;}
  .logo-row{grid-template-columns:repeat(3,1fr);}
  .logo-cell:nth-child(3n){border-right:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 32px;}
  .footer-brand{grid-column:1 / -1;}
  .band-inner{grid-template-columns:1fr;gap:28px;padding:48px 0;}
  .band-points{padding-left:0;border-left:0;}
}
@media (max-width:639px){
  :root{--space-section:64px;}
  body{font-size:16px;}
  .container{padding:0 20px;}
  .hero{min-height:78vh;padding:120px 0 56px;}
  .hero h1{font-size:34px;}
  .hero-sub{font-size:16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-stat{flex:1 1 100%;padding:0 0 16px;}
  .scroll-cue{display:none;}
  .section-head h2{font-size:28px;}
  .band-quote{font-size:22px;}
  .story-left h2{font-size:28px;}
  .card-body h3{font-size:20px;}
  .news-item{grid-template-columns:1fr;gap:16px;padding:20px 4px;}
  .news-thumb img{width:100%;height:auto;aspect-ratio:16/9;}
  .news-go{display:none;}
  .faq-q{font-size:17px;gap:16px;padding:20px 2px;}
  .faq-a p{padding:0 2px 24px 54px;font-size:15px;}
  .trust-num .n{font-size:34px;}
  .trust-quote{font-size:21px;}
  .logo-row{grid-template-columns:repeat(2,1fr);}
  .logo-cell:nth-child(3n){border-right:1px solid var(--line);}
  .logo-cell:nth-child(2n){border-right:0;}
  .footer-grid{grid-template-columns:1fr;gap:0;padding:40px 0 24px;}
  .footer-brand{padding-bottom:24px;}
  .footer-col{border-bottom:1px solid rgba(255,255,255,.12);}
  .footer-col h4{padding:18px 0;margin:0;cursor:pointer;display:flex;justify-content:space-between;align-items:center;}
  .footer-col h4 .foot-toggle{display:block;transition:transform .32s var(--ease);}
  .footer-col.is-open h4 .foot-toggle{transform:rotate(45deg);}
  .footer-col ul{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
  .footer-col.is-open ul{max-height:320px;padding-bottom:16px;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: article */
:root{
  --brand-900:#0B1F1A;
  --brand-700:#0E3A31;
  --brand-500:#17624F;
  --accent-500:#C6F24E;
  --warm-500:#D2622F;
  --bg-000:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E2E1DA;
  --ink-900:#101614;
  --muted:#5C6A65;
  --radius-lg:18px;
  --radius-sm:14px;
  --radius-pill:999px;
  --radius-badge:6px;
  --shadow-1:0 1px 2px rgba(11,31,26,.05);
  --shadow-2:0 12px 32px -18px rgba(11,31,26,.22);
  --shadow-3:0 28px 60px -30px rgba(11,31,26,.32);
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-mono:"Space Grotesk","IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-000);
  color:var(--ink-900);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.24;color:var(--ink-900)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media(min-width:1440px){:root{--container:1320px}}

/* ---------- progress ---------- */
.read-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--accent-500);z-index:1200;transition:width .12s linear}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:72px;
  background:rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.16);
  box-shadow:var(--shadow-1);
  transition:background .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header .nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:900;font-size:17px;letter-spacing:-.01em}
.logo-mark{width:14px;height:14px;background:var(--accent-500);transform:rotate(45deg);border-radius:3px;flex:0 0 auto}
.logo-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.main-nav{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;color:rgba(255,255,255,.9);font-size:15px;font-weight:500;padding:6px 0;transition:color .2s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--accent-500);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link:hover,.nav-link.active{color:#fff;font-weight:700}
.nav-actions{display:flex;align-items:center;gap:14px}
.icon-btn{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-pill);color:rgba(255,255,255,.92);transition:background .2s var(--ease),color .2s var(--ease)}
.icon-btn:hover{background:rgba(255,255,255,.14);color:#fff}
.site-header.scrolled{background:rgba(246,245,241,.94);border-bottom-color:var(--line);box-shadow:var(--shadow-2);-webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%)}
.site-header.scrolled .logo,
.site-header.scrolled .nav-link,
.site-header.scrolled .icon-btn{color:var(--ink-900)}
.site-header.scrolled .nav-link{color:var(--muted)}
.site-header.scrolled .nav-link:hover,
.site-header.scrolled .nav-link.active{color:var(--brand-700)}
.site-header.scrolled .icon-btn:hover{background:rgba(14,58,49,.08);color:var(--brand-700)}
.menu-toggle{display:none;width:44px;height:44px;position:relative}
.menu-toggle span{position:absolute;left:12px;right:12px;height:2px;background:#fff;transition:transform .3s var(--ease),opacity .3s var(--ease)}
.menu-toggle span:first-child{top:18px}
.menu-toggle span:last-child{top:26px}
.site-header.scrolled .menu-toggle span{background:var(--ink-900)}
.menu-toggle.is-open span:first-child{transform:translateY(4px) rotate(45deg)}
.menu-toggle.is-open span:last-child{transform:translateY(-4px) rotate(-45deg)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;border-radius:var(--radius-pill);font-size:15px;font-weight:700;letter-spacing:.01em;transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);border:1px solid transparent;min-height:44px}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--accent-500);color:var(--brand-900);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:#fff;color:var(--brand-900);border-color:#fff}
.btn-outline{background:transparent;color:var(--brand-700);border-color:var(--brand-700)}
.btn-outline:hover{background:var(--brand-700);color:#fff}
.btn-sm{padding:10px 20px;font-size:14px;min-height:40px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--brand-700);position:relative}
.text-link::after{content:"";position:absolute;left:0;right:0;bottom:-3px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.text-link:hover::after{transform:scaleX(1)}
.text-link svg{transition:transform .3s var(--ease)}
.text-link:hover svg{transform:translateX(4px)}

/* mobile drawer */
.mobile-drawer{position:fixed;inset:0;z-index:990;background:rgba(11,31,26,.72);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease)}
.mobile-drawer.is-open{opacity:1;visibility:visible}
.drawer-inner{padding:104px 24px 40px;display:flex;flex-direction:column;gap:4px;height:100%;overflow-y:auto}
.drawer-link{font-size:24px;font-weight:700;color:#fff;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.14)}
.drawer-link:hover{color:var(--accent-500)}
.drawer-foot{margin-top:auto;padding-top:28px;color:rgba(255,255,255,.62);font-size:13px;line-height:1.9}
.drawer-foot .btn{width:100%;margin-bottom:14px}

/* ---------- article hero ---------- */
.article-hero{position:relative;padding:150px 0 64px;color:#fff;background:var(--brand-900);overflow:hidden}
.article-hero::before{content:"";position:absolute;inset:0;background-image:url("/assets/images/backpic/back-3.webp");background-size:cover;background-position:center;opacity:.34}
.article-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,31,26,.86),rgba(11,31,26,.94))}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:rgba(255,255,255,.62);margin-bottom:26px}
.breadcrumb a{color:rgba(255,255,255,.72)}
.breadcrumb a:hover{color:var(--accent-500)}
.breadcrumb .current{color:#fff;font-weight:600;max-width:52vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hero-badges{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:20px}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;padding:4px 10px;border-radius:var(--radius-badge);background:rgba(198,242,78,.16);color:var(--accent-500);letter-spacing:.04em}
.badge.warm{background:rgba(210,98,47,.18);color:#F0A07A}
.badge.plain{background:rgba(255,255,255,.12);color:rgba(255,255,255,.86)}
.article-hero h1{color:#fff;font-size:44px;line-height:1.24;max-width:920px;font-weight:900}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px 28px;margin-top:28px;padding-top:24px;border-top:1px solid rgba(255,255,255,.18);font-family:var(--font-mono);font-size:14px;letter-spacing:.06em;color:rgba(255,255,255,.68);font-variant-numeric:tabular-nums}

/* ---------- article layout ---------- */
.article-section{padding:72px 0 96px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:56px}
@media(min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,720px) 260px;justify-content:center}
}
.article-body{max-width:720px;font-size:17px;line-height:1.9;color:var(--ink-900)}
.article-body p{margin:0 0 1.25em}
.article-body h2{font-size:30px;margin:40px 0 20px;position:relative;padding-left:24px;scroll-margin-top:104px}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;background:var(--accent-500);border-radius:2px}
.article-body h3{font-size:22px;margin:34px 0 14px;scroll-margin-top:104px}
.article-body h4{font-size:18px;margin:26px 0 12px}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:0}
.article-body ul li,.article-body ol li{position:relative;padding-left:24px;margin-bottom:.6em;color:var(--ink-900)}
.article-body ul li::before{content:"";position:absolute;left:4px;top:14px;width:6px;height:6px;background:var(--brand-500);border-radius:50%}
.article-body ol{counter-reset:li}
.article-body ol li{counter-increment:li}
.article-body ol li::before{content:counter(li,decimal-leading-zero);position:absolute;left:0;top:0;font-family:var(--font-mono);font-size:13px;color:var(--warm-500);font-weight:600}
.article-body blockquote{margin:28px 0;padding:20px 24px;background:#EFEEE7;border-left:3px solid var(--accent-500);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--brand-700);font-family:var(--font-serif);font-size:18px;line-height:1.8}
.article-body img{border-radius:var(--radius-lg);margin:28px 0;width:100%}
.article-body figure{margin:28px 0}
.article-body figcaption{font-size:13px;color:var(--muted);margin-top:10px;text-align:center;font-family:var(--font-mono);letter-spacing:.04em}
.article-body a{color:var(--brand-500);border-bottom:1px solid rgba(23,98,79,.32)}
.article-body a:hover{color:var(--brand-700);border-bottom-color:var(--brand-700)}
.article-body strong{font-weight:700}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.article-body th{background:#EFEEE7;font-weight:700}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* aside */
.article-side{display:flex;flex-direction:column;gap:28px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px 20px;box-shadow:var(--shadow-1)}
.side-card h3{font-size:15px;letter-spacing:.08em;font-family:var(--font-mono);color:var(--muted);font-weight:600;text-transform:uppercase;margin-bottom:16px}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{display:block;font-size:14px;line-height:1.6;color:var(--muted);padding:8px 0 8px 14px;border-left:2px solid var(--line);transition:color .2s var(--ease),border-color .2s var(--ease),padding-left .2s var(--ease)}
.toc-list a:hover{color:var(--brand-700);border-left-color:var(--accent-500);padding-left:18px}
.side-posts{display:flex;flex-direction:column;gap:18px}
.side-post{display:flex;gap:12px;align-items:flex-start}
.side-post img{width:64px;height:64px;object-fit:cover;border-radius:12px;flex:0 0 auto}
.side-post h4{font-size:14px;font-weight:700;line-height:1.5}
.side-post span{font-family:var(--font-mono);font-size:12px;color:var(--muted);letter-spacing:.04em}
.side-post:hover h4{color:var(--brand-700)}
@media(min-width:1200px){
  .article-side{position:sticky;top:96px;align-self:start}
}

/* tags / share */
.article-foot{margin-top:52px;padding-top:28px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
.tag{display:inline-flex;align-items:center;font-size:13px;padding:6px 14px;border-radius:var(--radius-badge);background:#EFEEE7;color:var(--brand-700);border:1px solid var(--line);transition:background .2s var(--ease),color .2s var(--ease)}
.tag:hover{background:var(--brand-700);color:#fff;border-color:var(--brand-700)}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:14px;color:var(--muted)}
.share-row .share-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;color:var(--brand-700);background:var(--surface);transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease)}
.share-row .share-btn:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px)}

/* prev / next */
.prevnext{display:grid;grid-template-columns:1fr;gap:16px;margin-top:44px}
@media(min-width:768px){.prevnext{grid-template-columns:1fr 1fr}}
.pn-card{display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px 20px;box-shadow:var(--shadow-1);transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease)}
.pn-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#D6D4C9}
.pn-card span{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--muted)}
.pn-card strong{font-size:17px;color:var(--ink-900);font-weight:700;line-height:1.5}
.pn-card small{font-size:13px;color:var(--muted)}
.pn-card.next{text-align:right}
.back-cat{display:inline-flex;align-items:center;gap:8px;margin-top:28px;font-weight:700;color:var(--brand-700)}

/* empty state */
.empty-state{min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:14px;border:1px dashed var(--line);border-radius:var(--radius-lg);background:var(--surface);padding:48px 24px}
.empty-state svg{color:var(--brand-500);opacity:.7}
.empty-state h2{font-size:22px}
.empty-state p{color:var(--muted);font-size:15px;max-width:420px}

/* cta band */
.cta-band{background:var(--brand-900);color:#fff;padding:88px 0;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:url("/assets/images/backpic/back-1.webp");background-size:cover;background-position:center;opacity:.16}
.cta-inner{position:relative;z-index:2;display:grid;gap:36px;grid-template-columns:1fr;align-items:center}
@media(min-width:1024px){.cta-inner{grid-template-columns:1fr 1fr;gap:64px}}
.cta-inner h2{color:#fff;font-size:36px}
.cta-inner p{color:rgba(255,255,255,.72);margin-top:14px;font-size:16px;line-height:1.9}
.cta-form{display:flex;flex-direction:column;gap:12px}
.cta-form .field-row{display:flex;gap:12px;flex-wrap:wrap}
.cta-form input{flex:1 1 240px;height:52px;padding:0 18px;border-radius:var(--radius-badge);border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.08);color:#fff;font-size:15px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.cta-form input::placeholder{color:rgba(255,255,255,.5)}
.cta-form input:focus{outline:none;border-color:var(--accent-500);box-shadow:0 0 0 2px rgba(198,242,78,.4)}
.cta-note{font-size:12px;color:rgba(255,255,255,.5);line-height:1.7}

/* footer */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.7);border-top:1px solid var(--accent-500);padding:72px 0 28px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:40px}}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{color:rgba(255,255,255,.62);margin-bottom:16px;font-size:14px}
.footer-brand .contact{color:rgba(255,255,255,.5);font-size:13px;line-height:1.9}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;display:flex;justify-content:space-between;align-items:center;cursor:default}
.footer-col .foot-toggle{display:none;color:var(--accent-500);font-size:18px;line-height:1}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:rgba(255,255,255,.66);font-size:14px;transition:color .2s var(--ease),padding-left .2s var(--ease)}
.footer-col a:hover{color:var(--accent-500);padding-left:4px}
.footer-bottom{margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.45);font-family:var(--font-mono);letter-spacing:.02em}

/* back to top */
.to-top{position:fixed;right:24px;bottom:28px;width:48px;height:48px;border-radius:50%;background:var(--brand-700);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),background .25s var(--ease);z-index:900}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--accent-500);color:var(--brand-900)}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media(max-width:1023px){
  .main-nav{display:none}
  .nav-actions .btn{display:none}
  .menu-toggle{display:block}
}
@media(max-width:639px){
  .site-header,.site-header .nav-inner{height:60px}
  .logo{font-size:15px}
  .logo-text{max-width:52vw}
  .article-hero{padding:118px 0 48px}
  .article-hero h1{font-size:31px}
  .article-section{padding:48px 0 64px}
  .article-body h2{font-size:24px}
  .article-body h3{font-size:20px}
  .cta-band{padding:64px 0}
  .cta-inner h2{font-size:28px}
  .container{padding:0 20px}
  .breadcrumb .current{max-width:44vw}
  .footer-col ul{display:none}
  .footer-col.open ul{display:flex}
  .footer-col .foot-toggle{display:block}
  .footer-col h4{cursor:pointer}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root{
  --brand-900:#0B1F1A;
  --brand-700:#0E3A31;
  --brand-500:#17624F;
  --accent-500:#C6F24E;
  --warm-500:#D2622F;
  --bg-000:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E2E1DA;
  --ink-900:#101614;
  --muted:#5C6A65;
  --radius-lg:18px;
  --radius-sm:14px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,31,26,.05);
  --shadow-2:0 12px 32px -18px rgba(11,31,26,.22);
  --shadow-3:0 28px 60px -30px rgba(11,31,26,.32);
  --space-section:112px;
  --font-sans:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --font-mono:'Space Grotesk','IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ===== 基础 reset ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  color:var(--ink-900);
  background:var(--bg-000);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-radius:0;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.2;}
p{margin:0;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;}
figure{margin:0;}
::selection{background:var(--accent-500);color:var(--brand-900);}

/* ===== 覆盖 Foundation 默认外观 ===== */
.row{max-width:none;margin-left:-12px;margin-right:-12px;}
.row .column,.row .columns{padding-left:12px;padding-right:12px;float:none;}
body,h1,h2,h3,h4,h5,h6,p,li,td,th{font-family:var(--font-sans);}
body{background:var(--bg-000);color:var(--ink-900);}
a:hover{color:var(--brand-500);}
ul.accordion,ul.accordion li{list-style:none;}

/* ===== 容器 ===== */
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:14px 28px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  position:relative;
  overflow:hidden;
  transition:background-color .32s var(--ease),color .32s var(--ease),border-color .32s var(--ease),transform .2s var(--ease);
}
.btn:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--brand-700);color:#fff;border-color:var(--brand-700);}
.btn-primary:hover{background:var(--accent-500);border-color:var(--accent-500);color:var(--brand-900);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-ghost:hover{background:#fff;color:var(--brand-900);border-color:#fff;}
.btn-outline{background:transparent;color:var(--brand-700);border-color:var(--brand-700);}
.btn-outline:hover{background:var(--brand-700);color:#fff;}
.btn-sm{min-height:40px;padding:9px 20px;font-size:14px;}
.btn-accent{background:var(--accent-500);color:var(--brand-900);border-color:var(--accent-500);}
.btn-accent:hover{background:#fff;color:var(--brand-900);border-color:#fff;}

/* 文字链 */
.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:700;
  color:var(--brand-700);
  position:relative;
  padding-bottom:3px;
}
.text-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.text-link:hover::after{transform:scaleX(1);}
.text-link .arrow{transition:transform .3s var(--ease);}
.text-link:hover .arrow{transform:translateX(4px);}

/* ===== 顶部导航 ===== */
.site-header{
  position:fixed;
  top:0;left:0;
  width:100%;
  z-index:120;
  background:rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.16);
  box-shadow:var(--shadow-1);
  transition:background-color .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header.scrolled{
  background:rgba(246,245,241,.92);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-2);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:16px;height:16px;
  background:var(--accent-500);
  transform:rotate(45deg);
  border-radius:3px;
  flex-shrink:0;
}
.logo-text{
  font-size:17px;
  font-weight:900;
  letter-spacing:-.01em;
  color:#fff;
  white-space:nowrap;
  transition:color .32s var(--ease);
}
.site-header.scrolled .logo-text{color:var(--ink-900);}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 12px;
  font-size:15px;
  font-weight:500;
  color:rgba(255,255,255,.88);
  transition:color .32s var(--ease);
}
.site-header.scrolled .nav-link{color:var(--muted);}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--accent-500);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav-link:hover{color:#fff;}
.site-header.scrolled .nav-link:hover{color:var(--ink-900);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{font-weight:900;color:#fff;}
.site-header.scrolled .nav-link.active{color:var(--ink-900);}
.nav-link.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.28);
  border-radius:var(--radius-pill);
  background:transparent;
  color:#fff;
  transition:background-color .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.14);}
.site-header.scrolled .icon-btn{color:var(--brand-700);border-color:var(--line);background:#fff;}
.site-header.scrolled .icon-btn:hover{background:var(--bg-000);}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  position:relative;
  border:1px solid rgba(255,255,255,.28);
  border-radius:var(--radius-pill);
  background:transparent;
}
.menu-toggle span{
  position:absolute;
  left:12px;right:12px;
  height:2px;
  background:#fff;
  transition:transform .3s var(--ease),opacity .3s var(--ease),background-color .3s var(--ease);
}
.menu-toggle span:nth-child(1){top:17px;}
.menu-toggle span:nth-child(2){bottom:17px;}
.site-header.scrolled .menu-toggle{border-color:var(--line);}
.site-header.scrolled .menu-toggle span{background:var(--ink-900);}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg);}
.menu-toggle[aria-expanded="true"] span:nth-child(2){transform:translateY(-5px) rotate(-45deg);}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:110;
  background:rgba(11,31,26,.94);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  padding:96px 24px 32px;
  display:flex;
  flex-direction:column;
  gap:6px;
  transform:translateY(-12px);
  opacity:0;
  visibility:hidden;
  transition:opacity .32s var(--ease),transform .32s var(--ease),visibility .32s var(--ease);
}
.mobile-drawer.open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer-link{
  display:block;
  font-size:24px;
  font-weight:700;
  color:#fff;
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.drawer-link.active{color:var(--accent-500);}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:14px;}
.drawer-foot p{color:rgba(255,255,255,.62);font-size:14px;line-height:1.7;}

/* ===== 分类 Hero ===== */
.hero-cat{
  position:relative;
  min-height:64vh;
  display:flex;
  align-items:flex-end;
  padding:170px 0 72px;
  color:#fff;
  background-color:var(--brand-900);
  background-image:linear-gradient(180deg,rgba(11,31,26,.62) 0%,rgba(11,31,26,.86) 78%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.hero-cat::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;width:100%;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.08em;
  color:var(--accent-500);
  margin-bottom:22px;
}
.hero-cat h1{
  font-size:clamp(38px,5.4vw,68px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.12;
  max-width:14em;
  color:#fff;
}
.hero-cat h1 span{
  display:block;
  margin-top:14px;
  font-size:clamp(17px,1.6vw,22px);
  font-weight:500;
  letter-spacing:0;
  color:rgba(255,255,255,.78);
  line-height:1.6;
}
.hero-sub{
  margin-top:24px;
  max-width:46ch;
  font-size:17px;
  color:rgba(255,255,255,.82);
  line-height:1.9;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px;}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:40px;
  margin-top:52px;
  padding-top:26px;
  border-top:1px solid rgba(255,255,255,.22);
}
.stat{min-width:150px;}
.stat-num{
  display:block;
  font-family:var(--font-mono);
  font-size:26px;
  font-weight:700;
  color:var(--accent-500);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.stat-label{
  display:block;
  margin-top:4px;
  font-size:13px;
  letter-spacing:.06em;
  color:rgba(255,255,255,.66);
}
.hero-index{
  position:absolute;
  right:24px;
  bottom:72px;
  z-index:3;
  font-family:var(--font-mono);
  font-size:15px;
  letter-spacing:.1em;
  color:rgba(255,255,255,.66);
}

/* ===== 页内锚点横滑 ===== */
.anchor-bar{
  position:sticky;
  top:72px;
  z-index:60;
  background:rgba(246,245,241,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.anchor-scroll{
  display:flex;
  gap:32px;
  overflow-x:auto;
  scrollbar-width:none;
  white-space:nowrap;
}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-scroll a{
  display:inline-block;
  padding:18px 0;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--muted);
  border-bottom:2px solid transparent;
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
.anchor-scroll a:hover{color:var(--brand-700);border-bottom-color:var(--accent-500);}

/* ===== 版块通用 ===== */
.section{padding:var(--space-section) 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:56px;}
.section-label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--brand-500);
  margin-bottom:14px;
}
.section-title{font-size:clamp(28px,3.2vw,42px);font-weight:900;letter-spacing:-.02em;}
.section-sub{margin-top:18px;font-size:17px;color:var(--muted);line-height:1.9;}
.section-line{border-top:1px solid var(--line);}
.bg-paper{background:var(--bg-000);}
.bg-surface{background:var(--surface);}

/* ===== 理由卡片 ===== */
.reason-card{
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:32px 28px;
  box-shadow:var(--shadow-1);
  transition:transform .32s var(--ease),box-shadow .32s var(--ease);
}
.reason-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.card-index{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--warm-500);
  margin-bottom:18px;
}
.card-title{font-size:22px;font-weight:900;margin-bottom:14px;}
.card-text{font-size:16px;color:var(--muted);line-height:1.9;}

/* ===== 步骤流 ===== */
.step-flow{position:relative;}
.step{
  display:grid;
  grid-template-columns:96px minmax(0,1fr);
  gap:28px;
  position:relative;
  padding-bottom:60px;
}
.step:last-child{padding-bottom:0;}
.step:not(:last-child)::before{
  content:"";
  position:absolute;
  left:47px;
  top:68px;
  bottom:0;
  width:1px;
  background:var(--line);
}
.step-num{
  width:64px;height:64px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--brand-700);
  color:#fff;
  font-family:var(--font-mono);
  font-size:19px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  position:relative;
  z-index:2;
}
.step-body{max-width:760px;}
.step-title{font-size:24px;font-weight:900;margin-bottom:14px;}
.step-text{font-size:16.5px;color:var(--muted);line-height:1.9;}
.step-list{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.step-list li{
  position:relative;
  padding-left:20px;
  font-size:16px;
  color:var(--muted);
  line-height:1.85;
}
.step-list li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--accent-500);
}
.step-media{
  margin-top:26px;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface);
  box-shadow:var(--shadow-1);
}
.step-media img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  transition:transform .6s var(--ease);
}
.step-media:hover img{transform:scale(1.04);}
.step-media figcaption{
  padding:12px 18px 16px;
  font-size:13px;
  color:var(--muted);
  font-family:var(--font-mono);
  letter-spacing:.02em;
}

/* ===== 适配清单 ===== */
.check-item{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:30px 0;
  border-top:1px solid var(--line);
  height:100%;
}
.check-label{
  display:inline-block;
  align-self:flex-start;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--brand-700);
  background:rgba(198,242,78,.28);
  padding:4px 10px;
  border-radius:6px;
}
.check-desc{font-size:16px;color:var(--muted);line-height:1.9;}

/* ===== 说明条 ===== */
.notice{
  display:flex;
  flex-wrap:wrap;
  gap:24px;
  align-items:center;
  justify-content:space-between;
  background:var(--surface);
  border:1px solid var(--line);
  border-left:4px solid var(--accent-500);
  border-radius:var(--radius-sm);
  padding:26px 28px;
  box-shadow:var(--shadow-1);
}
.notice p{font-size:16px;color:var(--muted);max-width:62ch;}

/* ===== FAQ ===== */
.faq-list{margin:0;border-top:1px solid var(--line);}
.accordion.faq-list{background:transparent;border:none;}
.accordion.faq-list .accordion-item{
  border:none;
  border-bottom:1px solid var(--line);
  background:transparent;
}
.accordion.faq-list .accordion-title{
  background:transparent;
  border:none;
  color:var(--ink-900);
  font-size:18px;
  font-weight:700;
  line-height:1.55;
  padding:28px 56px 28px 60px;
  position:relative;
  transition:color .25s var(--ease);
}
.accordion.faq-list .accordion-title:hover{color:var(--brand-500);background:transparent;}
.accordion.faq-list .accordion-title::before{
  position:absolute;
  left:0;top:50%;
  right:auto;
  margin:0;
  transform:translateY(-50%);
  width:auto;height:auto;
  content:"01";
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.08em;
  color:var(--brand-500);
}
.accordion.faq-list .accordion-item:nth-child(2) .accordion-title::before{content:"02";}
.accordion.faq-list .accordion-item:nth-child(3) .accordion-title::before{content:"03";}
.accordion.faq-list .accordion-item:nth-child(4) .accordion-title::before{content:"04";}
.accordion.faq-list .accordion-item:nth-child(5) .accordion-title::before{content:"05";}
.accordion.faq-list .accordion-item:nth-child(6) .accordion-title::before{content:"06";}
.accordion.faq-list .accordion-title::after{
  content:"+";
  position:absolute;
  right:6px;top:50%;
  transform:translateY(-50%);
  font-size:22px;
  font-weight:400;
  color:var(--muted);
  transition:color .25s var(--ease);
}
.accordion.faq-list .accordion-item.is-active .accordion-title::after{content:"−";color:var(--brand-700);}
.accordion.faq-list .accordion-content{
  background:transparent;
  border:none;
  padding:0 56px 28px 60px;
  color:var(--muted);
  font-size:16px;
  line-height:1.9;
}

/* ===== CTA 通栏 ===== */
.cta-band{
  background:var(--brand-900);
  color:#fff;
  padding:96px 0;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;}
.cta-band h2{
  font-size:clamp(28px,3.2vw,40px);
  font-weight:900;
  color:#fff;
  line-height:1.2;
}
.cta-band .cta-note{
  margin-top:18px;
  font-size:16px;
  color:rgba(255,255,255,.72);
  line-height:1.9;
  max-width:44ch;
}
.cta-form{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;}
.field{flex:1 1 260px;display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13px;letter-spacing:.06em;color:rgba(255,255,255,.72);}
.field input{
  height:52px;
  padding:0 16px;
  border-radius:6px;
  border:1px solid rgba(255,255,255,.26);
  background:rgba(255,255,255,.06);
  color:#fff;
  font-size:16px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.field input::placeholder{color:rgba(255,255,255,.42);}
.field input:focus{
  outline:none;
  border-color:var(--accent-500);
  box-shadow:0 0 0 2px rgba(198,242,78,.45);
}
.field input.is-error{border-color:var(--warm-500);box-shadow:0 0 0 2px rgba(210,98,47,.3);}
.form-note{
  margin-top:16px;
  font-size:13px;
  color:rgba(255,255,255,.62);
  min-height:20px;
}
.form-note.is-ok{color:var(--accent-500);}
.form-note.is-error{color:#F0B49B;}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--brand-900);
  color:rgba(255,255,255,.74);
  border-top:1px solid var(--accent-500);
  padding:72px 0 28px;
  font-size:15px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .logo{margin-bottom:18px;}
.footer-brand p{font-size:15px;color:rgba(255,255,255,.72);margin-bottom:18px;}
.footer-brand .contact{font-size:14px;line-height:2;color:rgba(255,255,255,.56);}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  cursor:default;
}
.foot-toggle{display:none;font-family:var(--font-mono);color:var(--accent-500);}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);}
.footer-col a:hover{color:var(--accent-500);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  padding-top:24px;
  font-size:13px;
  color:rgba(255,255,255,.5);
  font-family:var(--font-mono);
  letter-spacing:.02em;
}

/* ===== 回到顶部 ===== */
.to-top{
  position:fixed;
  right:24px;
  bottom:28px;
  width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--brand-700);
  box-shadow:var(--shadow-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
  z-index:90;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--accent-500);color:var(--brand-900);border-color:var(--accent-500);}

/* ===== 滚动揭示 ===== */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  :root{--space-section:96px;}
}
@media (max-width:1023px){
  :root{--space-section:84px;}
  .main-nav{display:none;}
  .menu-toggle{display:block;}
  .nav-actions .icon-btn{display:none;}
  .nav-inner{height:64px;}
  .anchor-bar{top:64px;}
  .hero-cat{padding:140px 0 60px;min-height:56vh;}
  .footer-grid{grid-template-columns:1fr 1fr 1fr;gap:32px;}
  .step{grid-template-columns:76px minmax(0,1fr);gap:20px;}
  .step:not(:last-child)::before{left:37px;}
  .step-num{width:56px;height:56px;font-size:17px;}
  .hero-index{right:24px;bottom:56px;font-size:14px;}
}
@media (max-width:767px){
  :root{--space-section:64px;}
  body{font-size:16px;}
  .container{padding-left:20px;padding-right:20px;}
  .section-head{margin-bottom:36px;}
  .hero-cat{padding:120px 0 48px;min-height:52vh;}
  .hero-stats{gap:24px;margin-top:38px;}
  .stat{min-width:110px;}
  .stat-num{font-size:20px;}
  .hero-index{position:static;display:block;margin-top:28px;right:auto;bottom:auto;}
  .step{grid-template-columns:1fr;gap:16px;padding-bottom:44px;}
  .step:not(:last-child)::before{display:none;}
  .step-title{font-size:20px;}
  .accordion.faq-list .accordion-title{padding:22px 40px 22px 44px;font-size:16.5px;}
  .accordion.faq-list .accordion-content{padding:0 40px 22px 44px;font-size:15.5px;}
  .cta-band{padding:64px 0;}
  .cta-form{flex-direction:column;align-items:stretch;}
  .footer-grid{grid-template-columns:1fr;gap:0;padding-bottom:16px;}
  .footer-brand{padding-bottom:28px;}
  .footer-col{border-top:1px solid rgba(255,255,255,.12);}
  .footer-col h4{padding:20px 0;margin-bottom:0;cursor:pointer;}
  .foot-toggle{display:block;}
  .footer-col ul{display:none;padding-bottom:18px;}
  .footer-col.open ul{display:flex;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .to-top{right:16px;bottom:18px;}
}
@media (max-width:519px){
  .hero-cat h1{font-size:32px;}
  .logo-text{font-size:15px;}
  .btn{padding:12px 22px;font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --brand-900:#0B1F1A;
  --brand-700:#0E3A31;
  --brand-500:#17624F;
  --accent-500:#C6F24E;
  --warm-500:#D2622F;
  --bg-000:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E2E1DA;
  --ink-900:#101614;
  --muted:#5C6A65;
  --radius-lg:18px;
  --radius-sm:14px;
  --radius-xs:6px;
  --shadow-1:0 1px 2px rgba(11,31,26,.05);
  --shadow-2:0 12px 32px -18px rgba(11,31,26,.22);
  --shadow-3:0 28px 60px -30px rgba(11,31,26,.32);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:72px;
  --gutter:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-000);
  color:var(--ink-900);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand-700);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-500);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
h1,h2,h3,h4{font-weight:700;letter-spacing:-.02em;line-height:1.2;}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 var(--gutter);
}
.mono{font-family:"Space Grotesk","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums;letter-spacing:.06em;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:var(--nav-h);
  display:flex;
  align-items:center;
  background:rgba(255,255,255,.08);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.16);
  box-shadow:var(--shadow-1);
  transition:background .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header .logo{color:#fff;}
.site-header .nav-link{color:rgba(255,255,255,.86);}
.site-header .icon-btn{color:#fff;}
.site-header.is-scrolled{
  background:rgba(246,245,241,.92);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-2);
}
.site-header.is-scrolled .logo{color:var(--ink-900);}
.site-header.is-scrolled .nav-link{color:var(--muted);}
.site-header.is-scrolled .nav-link.active,
.site-header.is-scrolled .nav-link:hover{color:var(--ink-900);}
.site-header.is-scrolled .icon-btn{color:var(--ink-900);}
.nav-inner{
  display:flex;
  align-items:center;
  gap:28px;
  width:100%;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:900;
  font-size:17px;
  letter-spacing:-.01em;
  white-space:nowrap;
  flex:0 0 auto;
}
.logo-mark{
  width:16px;height:16px;
  background:var(--accent-500);
  transform:rotate(45deg);
  border-radius:3px;
  flex:0 0 auto;
}
.logo-text{line-height:1;}
.main-nav{
  display:flex;
  align-items:center;
  gap:22px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  font-size:15px;
  line-height:var(--nav-h);
  padding:0 2px;
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:22px;
  height:2px;
  background:var(--accent-500);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav-link:hover::after,
.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{font-weight:700;}
.nav-actions{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:8px;
}
.icon-btn{
  width:44px;height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.icon-btn:hover{background:rgba(198,242,78,.22);}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:6px;
}
.menu-toggle span{
  display:block;
  width:22px;height:2px;
  background:currentColor;
  border-radius:2px;
  transition:transform .3s var(--ease),opacity .3s var(--ease);
  color:inherit;
}
.site-header .menu-toggle{color:#fff;}
.site-header.is-scrolled .menu-toggle{color:var(--ink-900);}
.menu-toggle.is-open span:first-child{transform:translateY(4px) rotate(45deg);}
.menu-toggle.is-open span:last-child{transform:translateY(-4px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:14px 28px;
  border-radius:999px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  overflow:hidden;
  transition:background-color .32s var(--ease),color .32s var(--ease),border-color .32s var(--ease),transform .2s var(--ease);
}
.btn span{position:relative;z-index:1;}
.btn-primary{background:var(--brand-700);color:#fff;}
.btn-primary:hover{background:var(--accent-500);color:var(--brand-900);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  color:currentColor;
  border:1px solid var(--brand-700);
  padding:13px 26px;
}
.btn-ghost:hover{background:var(--brand-700);color:#fff;}
.btn-sm{min-height:40px;padding:10px 20px;font-size:14px;}
.btn-ghost-light{
  border:1px solid rgba(255,255,255,.55);
  color:#fff;
  background:transparent;
  padding:13px 26px;
  border-radius:999px;
  font-weight:700;
  font-size:15px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  transition:background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.btn-ghost-light:hover{background:var(--accent-500);border-color:var(--accent-500);color:var(--brand-900);}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:700;
  font-size:15px;
  color:var(--brand-700);
  position:relative;
}
.link-more::after{
  content:"";
  position:absolute;
  left:0;right:22px;bottom:-3px;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.link-more:hover::after{transform:scaleX(1);}
.link-more svg{transition:transform .3s var(--ease);}
.link-more:hover svg{transform:translateX(4px);}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:74vh;
  display:flex;
  align-items:center;
  padding:calc(var(--nav-h) + 76px) 0 72px;
  background-image:linear-gradient(180deg,rgba(11,31,26,.72),rgba(11,31,26,.86)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  color:#fff;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.hero .container{position:relative;z-index:2;text-align:center;}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--accent-500);
  letter-spacing:.08em;
  margin-bottom:22px;
}
.hero-eyebrow::before,
.hero-eyebrow::after{
  content:"";
  width:28px;height:1px;
  background:rgba(198,242,78,.6);
}
.hero-title{
  font-size:clamp(38px,6vw,68px);
  font-weight:900;
  line-height:1.12;
  margin-bottom:20px;
}
.hero-title .h1-sub{
  display:block;
  font-size:clamp(17px,2.1vw,24px);
  font-weight:500;
  letter-spacing:0;
  color:rgba(255,255,255,.82);
  margin-top:16px;
  line-height:1.6;
}
.hero-sub{
  max-width:640px;
  margin:0 auto 34px;
  font-size:17px;
  line-height:1.9;
  color:rgba(255,255,255,.8);
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  justify-content:center;
}
.hero-index{
  position:absolute;
  right:var(--gutter);
  bottom:48px;
  z-index:3;
  font-size:15px;
  color:rgba(255,255,255,.66);
}
.hero-index strong{color:var(--accent-500);font-size:22px;font-weight:700;}

/* ---------- 页内锚点 ---------- */
.anchor-bar{
  position:sticky;
  top:var(--nav-h);
  z-index:60;
  background:rgba(246,245,241,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.anchor-scroll{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding:14px 0;
  scrollbar-width:none;
}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-scroll a{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 18px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--surface);
  font-size:14px;
  color:var(--muted);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.anchor-scroll a:hover{border-color:var(--brand-700);color:var(--brand-700);background:rgba(198,242,78,.16);}

/* ---------- 板块 ---------- */
.section{padding:112px 0;}
.section-tight{padding:84px 0;}
.section-line{border-top:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:56px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--brand-500);
  border:1px solid var(--line);
  background:rgba(198,242,78,.18);
  border-radius:var(--radius-xs);
  padding:4px 10px;
  margin-bottom:18px;
}
.tag-warm{background:rgba(210,98,47,.1);color:var(--warm-500);}
.section-head h2{
  font-size:clamp(28px,3.6vw,42px);
  font-weight:900;
  margin-bottom:18px;
}
.section-head p{
  color:var(--muted);
  font-size:17px;
  line-height:1.9;
}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-item{
  padding:36px 28px;
  border-right:1px solid var(--line);
}
.stat-item:last-child{border-right:0;}
.stat-num{
  font-size:clamp(30px,3.4vw,44px);
  font-weight:700;
  color:var(--brand-700);
  line-height:1.1;
  margin-bottom:10px;
}
.stat-label{font-size:15px;color:var(--ink-900);font-weight:500;}
.stat-note{font-size:13px;color:var(--muted);margin-top:6px;}

/* ---------- Zigzag ---------- */
.zig-list{display:flex;flex-direction:column;gap:96px;}
.zig-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.zig-row:nth-child(even) .zig-media{order:2;}
.zig-row:nth-child(even) .zig-body{order:1;}
.zig-media{
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-2);
  aspect-ratio:4/3;
  background:var(--brand-900);
}
.zig-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .6s var(--ease);
}
.zig-row:hover .zig-media img{transform:scale(1.04);}
.zig-body .zig-no{
  font-size:14px;
  color:var(--warm-500);
  letter-spacing:.14em;
  margin-bottom:14px;
}
.zig-body h3{
  font-size:clamp(22px,2.4vw,26px);
  font-weight:900;
  margin-bottom:16px;
}
.zig-body p{color:var(--muted);margin-bottom:16px;}
.zig-points{display:flex;flex-direction:column;gap:10px;margin-top:8px;}
.zig-points li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--ink-900);
}
.zig-points li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:12px;height:2px;
  background:var(--accent-500);
}

/* ---------- 清单卡 ---------- */
.list-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.list-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:32px 28px;
  box-shadow:var(--shadow-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.list-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-2);
  border-color:rgba(14,58,49,.22);
}
.list-card .card-no{
  font-size:14px;
  color:var(--muted);
  margin-bottom:16px;
}
.list-card h3{font-size:20px;font-weight:700;margin-bottom:12px;}
.list-card p{color:var(--muted);font-size:15.5px;}
.list-card ul{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.list-card ul li{
  font-size:14.5px;
  color:var(--ink-900);
  padding-left:16px;
  position:relative;
}
.list-card ul li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--brand-500);
}

/* ---------- 适用场景 ---------- */
.scene-band{
  background:var(--surface);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.scene-item{
  padding:34px 28px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--bg-000);
  transition:background .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease);
}
.scene-item:hover{background:var(--surface);transform:translateY(-4px);box-shadow:var(--shadow-2);}
.scene-item .mono{font-size:14px;color:var(--brand-500);margin-bottom:14px;display:block;}
.scene-item h3{font-size:19px;margin-bottom:10px;}
.scene-item p{font-size:15px;color:var(--muted);}

/* ---------- 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:flex-start;
  gap:20px;
  padding:26px 0;
  text-align:left;
  font-size:18px;
  font-weight:700;
  color:var(--ink-900);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-500);}
.faq-q .q-no{
  font-size:14px;
  color:var(--brand-500);
  padding-top:6px;
  flex:0 0 auto;
}
.faq-q .q-text{flex:1 1 auto;}
.faq-q .q-icon{
  flex:0 0 auto;
  width:24px;height:24px;
  margin-top:4px;
  position:relative;
}
.faq-q .q-icon::before,
.faq-q .q-icon::after{
  content:"";
  position:absolute;
  background:var(--brand-700);
  border-radius:2px;
  transition:transform .32s var(--ease),opacity .32s var(--ease);
}
.faq-q .q-icon::before{left:0;top:11px;width:24px;height:2px;}
.faq-q .q-icon::after{left:11px;top:0;width:2px;height:24px;}
.faq-item.is-open .q-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s var(--ease);
}
.faq-a-inner{
  padding:0 64px 28px 44px;
  color:var(--muted);
  font-size:16px;
}
.faq-item.is-open .faq-a{max-height:420px;}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-900);
  color:#fff;
  padding:96px 0;
}
.cta-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.cta-band h2{
  font-size:clamp(28px,3.6vw,40px);
  font-weight:900;
  margin-bottom:16px;
}
.cta-band p{color:rgba(255,255,255,.76);font-size:16.5px;}
.cta-form{display:flex;flex-direction:column;gap:14px;}
.cta-form label{font-size:13px;color:rgba(255,255,255,.72);letter-spacing:.06em;}
.cta-form .field-row{display:flex;gap:12px;}
.cta-form input{
  width:100%;
  min-height:52px;
  padding:0 18px;
  border-radius:var(--radius-xs);
  border:1px solid rgba(255,255,255,.26);
  background:rgba(255,255,255,.08);
  color:#fff;
  font-size:15px;
  font-family:inherit;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.cta-form input::placeholder{color:rgba(255,255,255,.42);}
.cta-form input:focus{
  outline:none;
  border-color:var(--accent-500);
  box-shadow:0 0 0 2px rgba(198,242,78,.35);
  background:rgba(255,255,255,.12);
}
.cta-form .hint{font-size:12.5px;color:rgba(255,255,255,.55);}
.cta-form .btn-primary{background:var(--accent-500);color:var(--brand-900);}
.cta-form .btn-primary:hover{background:#fff;color:var(--brand-900);}
.cta-meta{
  display:flex;
  flex-wrap:wrap;
  gap:24px;
  margin-top:28px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.16);
  font-size:14px;
  color:rgba(255,255,255,.7);
}
.cta-meta strong{display:block;color:var(--accent-500);font-size:20px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--brand-900);
  color:rgba(255,255,255,.78);
  border-top:1px solid var(--accent-500);
  padding:72px 0 28px;
  font-size:14.5px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .logo{color:#fff;margin-bottom:16px;}
.footer-brand p{color:rgba(255,255,255,.72);margin-bottom:18px;}
.footer-brand .contact{font-size:13.5px;line-height:2;color:rgba(255,255,255,.6);}
.footer-col h4{
  font-size:15px;
  color:#fff;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-weight:700;
}
.foot-toggle{display:none;font-size:16px;color:var(--accent-500);}
.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(--accent-500);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  justify-content:space-between;
  padding-top:26px;
  font-size:13px;
  color:rgba(255,255,255,.55);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;
  bottom:28px;
  width:48px;height:48px;
  border-radius:999px;
  background:var(--brand-700);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--shadow-2);
  opacity:0;
  pointer-events:none;
  transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .3s var(--ease);
  z-index:100;
}
.to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{background:var(--accent-500);color:var(--brand-900);}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:110;
  background:rgba(11,31,26,.94);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  padding:96px 24px 40px;
  display:flex;
  flex-direction:column;
  gap:8px;
  opacity:0;
  pointer-events:none;
  transition:opacity .3s var(--ease);
}
.mobile-drawer.is-open{opacity:1;pointer-events:auto;}
.mobile-drawer a.drawer-link{
  color:#fff;
  font-size:24px;
  font-weight:700;
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.mobile-drawer a.drawer-link.active{color:var(--accent-500);}
.mobile-drawer .drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:14px;}
.mobile-drawer .drawer-foot .btn-primary{background:var(--accent-500);color:var(--brand-900);}
.mobile-drawer .drawer-contact{font-size:13.5px;color:rgba(255,255,255,.62);line-height:1.9;}

/* ---------- 揭示动画 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .container{max-width:1080px;}
  .zig-row{gap:48px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .nav-actions .btn-sm{display:none;}
  .section{padding:84px 0;}
  .section-tight{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr 1fr 1fr;gap:28px;}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .stat-strip{grid-template-columns:1fr;border-bottom:0;}
  .stat-item{border-right:0;border-bottom:1px solid var(--line);padding:28px 4px;}
  .stat-item:last-child{border-bottom:1px solid var(--line);}
  .zig-row{grid-template-columns:1fr;gap:28px;}
  .zig-row:nth-child(even) .zig-media{order:0;}
  .zig-row:nth-child(even) .zig-body{order:0;}
  .scene-grid{grid-template-columns:1fr;gap:20px;}
  .list-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:639px){
  :root{--gutter:20px;--nav-h:60px;}
  .logo{font-size:15px;}
  .logo-text{white-space:normal;line-height:1.2;max-width:150px;}
  .hero{min-height:78vh;padding:calc(var(--nav-h) + 56px) 0 56px;}
  .hero-sub{font-size:15.5px;}
  .hero-actions .btn,
  .hero-actions .btn-ghost-light{width:100%;justify-content:center;}
  .hero-index{position:static;margin-top:36px;text-align:center;font-size:14px;}
  .section{padding:64px 0;}
  .section-head{margin-bottom:36px;}
  .zig-list{gap:60px;}
  .faq-q{font-size:16.5px;gap:14px;}
  .faq-a-inner{padding:0 8px 24px 38px;font-size:15px;}
  .faq-item.is-open .faq-a{max-height:520px;}
  .cta-band{padding:64px 0;}
  .cta-form .field-row{flex-direction:column;}
  .footer-grid{grid-template-columns:1fr;gap:0;}
  .footer-brand{padding-bottom:24px;}
  .footer-col{border-top:1px solid rgba(255,255,255,.12);}
  .footer-col h4{margin:0;padding:18px 0;}
  .footer-col ul{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
  .footer-col.is-open ul{max-height:260px;padding-bottom:18px;}
  .foot-toggle{display:block;}
  .footer-bottom{flex-direction:column;}
  .to-top{right:16px;bottom:20px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --brand-900:#0B1F1A;
  --brand-700:#0E3A31;
  --brand-500:#17624F;
  --accent-500:#C6F24E;
  --warm-500:#D2622F;
  --bg-000:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E2E1DA;
  --ink-900:#101614;
  --muted:#5C6A65;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:6px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(11,31,26,.05);
  --shadow-2:0 12px 32px -18px rgba(11,31,26,.22);
  --shadow-3:0 28px 60px -30px rgba(11,31,26,.32);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sec:112px;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"Space Grotesk","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
@media (max-width:1023px){:root{--sec:84px}}
@media (max-width:639px){:root{--sec:64px}}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  color:var(--ink-900);
  background:var(--bg-000);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.menu-open{overflow:hidden}
h1,h2,h3,h4{margin:0;font-weight:900;letter-spacing:-.02em;line-height:1.2;font-family:var(--font-sans)}
h1{font-size:clamp(2rem,4.6vw,4rem);line-height:1.14}
h2{font-size:clamp(1.6rem,2.9vw,2.6rem);line-height:1.18}
h3{font-size:clamp(1.15rem,1.5vw,1.6rem)}
h4{font-size:1.125rem;font-weight:700}
p{margin:0 0 1.25em}
p:last-child{margin-bottom:0}
a{color:var(--brand-500);text-decoration:none;transition:color .32s var(--ease)}
a:hover{color:var(--brand-700)}
img{max-width:100%;display:block}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (min-width:1440px){.container{max-width:1320px}}
@media (max-width:639px){.container{padding-left:20px;padding-right:20px}}
.section{padding-top:var(--sec);padding-bottom:var(--sec)}
.section-tight{padding-top:calc(var(--sec) * .6);padding-bottom:calc(var(--sec) * .6)}
section[id]{scroll-margin-top:132px}
.kicker{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--brand-500);
  margin:0 0 14px;
}
.lead{font-size:19px;line-height:1.85;color:var(--muted)}
.rule{height:1px;background:var(--line);border:0;margin:0}
.badge{
  display:inline-block;
  font-size:12px;
  line-height:1.4;
  padding:4px 10px;
  border-radius:var(--r-sm);
  background:rgba(198,242,78,.3);
  color:var(--brand-700);
  font-weight:700;
  letter-spacing:.02em;
}
.badge-warm{background:rgba(210,98,47,.12);color:var(--warm-500)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:14px 28px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:16px;
  font-weight:700;
  line-height:1;
  cursor:pointer;
  text-decoration:none;
  transition:background-color .32s var(--ease),color .32s var(--ease),border-color .32s var(--ease),transform .32s var(--ease),box-shadow .32s var(--ease);
}
.btn-primary{background:var(--brand-700);color:#fff}
.btn-primary:hover,.btn-primary:focus{background:var(--accent-500);color:var(--brand-900)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff;color:#fff}
.btn-outline{background:transparent;color:var(--brand-700);border-color:var(--brand-700)}
.btn-outline:hover{background:var(--brand-700);color:#fff}
.btn-sm{min-height:44px;padding:11px 20px;font-size:15px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--brand-700);border-bottom:1px solid transparent}
.link-arrow svg{transition:transform .32s var(--ease)}
.link-arrow:hover{border-bottom-color:var(--brand-700)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  background:rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.16);
  box-shadow:var(--shadow-1);
  transition:background-color .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.nav-inner{display:flex;align-items:center;gap:20px;height:72px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900;letter-spacing:-.01em;font-size:17px;text-decoration:none;flex-shrink:0}
.logo:hover{color:#fff}
.logo-mark{width:13px;height:13px;background:var(--accent-500);border-radius:2px;transform:rotate(45deg);flex-shrink:0}
.main-nav{display:flex;align-items:center;gap:2px;margin:0 auto}
.nav-link{
  position:relative;
  padding:9px 13px;
  font-size:15px;
  font-weight:500;
  color:rgba(255,255,255,.88);
  text-decoration:none;
  border-radius:var(--r-sm);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:13px;right:13px;bottom:2px;
  height:2px;
  background:var(--accent-500);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav-link:hover,.nav-link.active{color:#fff}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:10px;color:#fff;flex-shrink:0}
.icon-btn{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid transparent;border-radius:50%;
  color:currentColor;cursor:pointer;
  transition:background-color .32s var(--ease),border-color .32s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.24)}
.menu-toggle{
  display:none;
  position:relative;
  width:44px;height:44px;
  background:transparent;border:0;color:currentColor;cursor:pointer;
}
.menu-toggle span{position:absolute;left:12px;right:12px;height:2px;background:currentColor;border-radius:2px;transition:transform .32s var(--ease)}
.menu-toggle span:nth-child(1){top:17px}
.menu-toggle span:nth-child(2){bottom:17px}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){transform:translateY(-5px) rotate(-45deg)}
.nav-extra{display:none}
.site-header.is-scrolled{background:rgba(246,245,241,.94);border-bottom-color:var(--line);box-shadow:var(--shadow-2)}
.site-header.is-scrolled .logo,
.site-header.is-scrolled .nav-link,
.site-header.is-scrolled .nav-actions{color:var(--ink-900)}
.site-header.is-scrolled .nav-link.active{color:var(--brand-900)}
.site-header.is-scrolled .icon-btn:hover{background:rgba(14,58,49,.08);border-color:rgba(14,58,49,.16)}
body.menu-open .site-header{background:rgba(11,31,26,.92);border-bottom-color:rgba(255,255,255,.14)}
body.menu-open .site-header .logo,
body.menu-open .site-header .nav-link,
body.menu-open .site-header .nav-actions{color:#fff}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  display:flex;
  align-items:flex-end;
  min-height:60vh;
  padding:120px 0 72px;
  color:#fff;
  background:var(--brand-900);
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(11,31,26,.88) 0%,rgba(11,31,26,.7) 60%,rgba(11,31,26,.86) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
}
.hero-bg::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.55;
}
.hero-inner{position:relative;z-index:1;width:100%}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:22px}
.crumb a{color:rgba(255,255,255,.7);text-decoration:none}
.crumb a:hover{color:#fff;text-decoration:underline}
.crumb .current{color:#fff;font-weight:700}
.eyebrow{font-family:var(--font-mono);font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-500);margin:0 0 16px}
.hero h1{max-width:16em;margin-bottom:22px}
.hero-sub{max-width:34em;font-size:17px;line-height:1.8;color:rgba(255,255,255,.86);margin-bottom:34px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-num{position:absolute;right:0;bottom:6px;font-family:var(--font-mono);font-size:14px;letter-spacing:.1em;color:rgba(255,255,255,.66)}
@media (max-width:639px){
  .hero{min-height:auto;padding:104px 0 56px}
  .hero-num{position:static;display:block;margin-top:26px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%}
}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;
  top:72px;
  z-index:50;
  background:rgba(246,245,241,.95);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.anchor-inner{display:flex;gap:8px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-inner a{
  flex:0 0 auto;
  font-size:15px;
  color:var(--muted);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:8px 16px;
  white-space:nowrap;
  transition:color .3s var(--ease),border-color .3s var(--ease),background-color .3s var(--ease);
}
.anchor-inner a:hover{color:var(--brand-900);border-color:var(--brand-500);background:#fff}
@media (max-width:1023px){.anchor-bar{top:60px}}

/* ---------- 通用板块 ---------- */
.section-head{max-width:44em;margin-bottom:48px}
.section-head h2{margin-bottom:16px}
.section-head p{color:var(--muted);margin:0}
.split-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px}
.split-head .section-head{margin-bottom:0}

/* ---------- 定义列表（本页主手法） ---------- */
.definition-list{border-top:1px solid var(--line)}
.def-row{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-start;
  gap:0;
  padding:32px 0;
  border-bottom:1px solid var(--line);
  transition:background-color .32s var(--ease);
}
.def-row:hover{background:rgba(255,255,255,.7)}
.def-label{flex:0 0 100%;display:flex;align-items:baseline;gap:14px;margin-bottom:14px}
.def-desc{flex:0 0 100%;color:var(--muted)}
.def-num{font-family:var(--font-mono);font-size:14px;letter-spacing:.08em;color:var(--warm-500);font-weight:500}
.def-label h3{margin:0;font-size:clamp(1.1rem,1.5vw,1.45rem)}
.def-row:hover .def-label h3{color:var(--brand-700)}
@media (min-width:1024px){
  .def-label{flex:0 0 33.3333%;max-width:33.3333%;margin-bottom:0;padding-right:40px}
  .def-desc{flex:0 0 66.6667%;max-width:66.6667%;padding-left:40px;border-left:1px solid var(--line)}
}

/* ---------- 卡片 ---------- */
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  height:100%;
  display:flex;
  flex-direction:column;
  transition:transform .32s var(--ease),box-shadow .32s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--line)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:26px 24px 28px;display:flex;flex-direction:column;gap:14px;flex:1}
.card-body h3{font-size:20px;line-height:1.35}
.card-body p{color:var(--muted);font-size:16px;margin:0}
.card-body .link-arrow{margin-top:auto;font-size:15px}
.mini-grid{margin-top:6px}

/* ---------- 场景卡 ---------- */
.scene{
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:26px 22px;
  transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease);
}
.scene:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(23,98,79,.35)}
.scene .scene-num{font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;color:var(--brand-500);display:block;margin-bottom:14px}
.scene h3{font-size:18px;margin-bottom:10px}
.scene p{color:var(--muted);font-size:15px;line-height:1.8;margin:0}

/* ---------- 图文流程 ---------- */
.flow-figure{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--surface)}
.flow-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.flow-list{margin-top:8px}
.flow-list li{display:flex;gap:18px;padding:20px 0;border-top:1px solid var(--line)}
.flow-list li:first-child{border-top:0;padding-top:0}
.flow-num{font-family:var(--font-mono);font-size:14px;letter-spacing:.08em;color:var(--warm-500);flex:0 0 auto;padding-top:4px}
.flow-list h4{margin-bottom:6px;font-size:17px}
.flow-list p{margin:0;color:var(--muted);font-size:16px}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  gap:18px;
  padding:24px 0;
  background:transparent;
  border:0;
  text-align:left;
  cursor:pointer;
  font-size:18px;
  font-weight:700;
  color:var(--ink-900);
  font-family:var(--font-sans);
  transition:color .3s var(--ease);
}
.faq-q:hover{color:var(--brand-700)}
.faq-q .faq-num{font-family:var(--font-mono);font-size:14px;letter-spacing:.08em;color:var(--brand-500);flex:0 0 auto}
.faq-q .faq-text{flex:1}
.faq-q .faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto}
.faq-q .faq-icon::before,
.faq-q .faq-icon::after{content:"";position:absolute;background:var(--brand-700);transition:transform .32s var(--ease),opacity .32s var(--ease)}
.faq-q .faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-q .faq-icon::after{top:0;bottom:0;left:8px;width:2px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a-inner{padding:0 0 26px 42px;color:var(--muted);font-size:16px}
.faq-a-inner p{margin:0}
@media (max-width:639px){
  .faq-q{font-size:16px;gap:12px;padding:20px 0}
  .faq-a-inner{padding-left:0}
}

/* ---------- CTA 带 ---------- */
.cta-band{background:var(--brand-900);color:#fff;padding:var(--sec) 0;position:relative;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:72px 72px;
}
.cta-band .container{position:relative;z-index:1}
.cta-band h2{color:#fff;margin-bottom:16px}
.cta-band p{color:rgba(255,255,255,.78)}
.cta-form label{display:block;font-size:13px;letter-spacing:.06em;color:rgba(255,255,255,.7);margin-bottom:8px;font-family:var(--font-mono)}
.field-row{display:flex;gap:12px;flex-wrap:wrap}
.cta-form input{
  flex:1 1 220px;
  min-height:52px;
  padding:14px 16px;
  font-size:16px;
  color:var(--ink-900);
  background:#fff;
  border:1px solid transparent;
  border-radius:var(--r-sm);
  font-family:var(--font-sans);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.cta-form input::placeholder{color:#98a29e}
.cta-form input:focus{outline:none;border-color:var(--accent-500);box-shadow:0 0 0 2px rgba(198,242,78,.55)}
.cta-form input.has-error{border-color:var(--warm-500);box-shadow:0 0 0 2px rgba(210,98,47,.35)}
.form-hint{font-size:13px;color:rgba(255,255,255,.62);margin:14px 0 0}
.form-msg{font-size:13px;margin:10px 0 0;min-height:20px}
.form-msg.error{color:#F0A17B}
.form-msg.success{color:var(--accent-500)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.72);border-top:1px solid var(--accent-500);padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{color:#fff;margin-bottom:18px}
.footer-brand p{font-size:15px;color:rgba(255,255,255,.7);margin-bottom:18px}
.footer-brand .contact{font-size:14px;line-height:2;color:rgba(255,255,255,.6)}
.footer-col h4{
  font-size:15px;
  color:#fff;
  margin-bottom:16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);text-decoration:none;transition:color .3s var(--ease)}
.footer-col a:hover{color:var(--accent-500)}
.foot-toggle{display:none;font-family:var(--font-mono);color:rgba(255,255,255,.5)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  align-items:center;
  margin-top:56px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;
  color:rgba(255,255,255,.5);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .foot-toggle{display:block}
  .footer-col ul{display:none}
  .footer-col.is-open ul{display:block}
}
@media (max-width:639px){
  .footer-grid{grid-template-columns:1fr}
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;bottom:24px;
  width:48px;height:48px;
  display:none;
  align-items:center;justify-content:center;
  background:var(--brand-700);
  color:#fff;
  border:0;border-radius:50%;
  cursor:pointer;
  box-shadow:var(--shadow-2);
  z-index:55;
  transition:background-color .3s var(--ease),transform .3s var(--ease);
}
.to-top.is-visible{display:flex}
.to-top:hover{background:var(--accent-500);color:var(--brand-900);transform:translateY(-3px)}

/* ---------- 揭示动画 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式导航 ---------- */
@media (max-width:1023px){
  .nav-inner{height:60px;gap:12px}
  .logo{font-size:15px}
  .menu-toggle{display:block}
  .nav-actions .btn-primary{display:none}
  .main-nav{
    position:fixed;
    top:0;left:0;right:0;bottom:0;
    margin:0;
    flex-direction:column;
    align-items:flex-start;
    justify-content:center;
    gap:6px;
    padding:96px 28px 40px;
    background:rgba(11,31,26,.94);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    transform:translateX(100%);
    transition:transform .32s var(--ease);
    overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-link{font-size:22px;color:#fff;padding:12px 0;font-weight:700}
  .nav-link::after{left:0;right:auto;width:32px;bottom:6px}
  .nav-extra{display:block;margin-top:28px;width:100%}
  .nav-extra .btn{width:100%}
  .nav-extra p{font-size:14px;color:rgba(255,255,255,.6);margin-top:16px}
}
@media (max-width:639px){
  .hero-sub{font-size:16px}
  .definition-list .def-row{padding:26px 0}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --brand-900:#0B1F1A;
  --brand-700:#0E3A31;
  --brand-500:#17624F;
  --accent-500:#C6F24E;
  --warm-500:#D2622F;
  --bg-000:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E2E1DA;
  --ink-900:#101614;
  --muted:#5C6A65;
  --radius-lg:18px;
  --radius-sm:14px;
  --radius-xs:6px;
  --shadow-1:0 1px 2px rgba(11,31,26,.05);
  --shadow-2:0 12px 32px -18px rgba(11,31,26,.22);
  --shadow-3:0 28px 60px -30px rgba(11,31,26,.32);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1240px;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",Consolas,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  color:var(--ink-900);
  background:var(--bg-000);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-700);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1440px){
  .container{max-width:1320px;}
}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:999px;
  font-size:16px;
  font-weight:700;
  line-height:1;
  letter-spacing:.01em;
  border:1px solid transparent;
  transition:background-color .32s var(--ease),color .32s var(--ease),border-color .32s var(--ease),transform .32s var(--ease),box-shadow .32s var(--ease);
  white-space:nowrap;
  min-height:48px;
}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--accent-500);color:var(--brand-900);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.btn-ghost:hover{background:#fff;color:var(--brand-900);border-color:#fff;}
.btn-outline{background:transparent;color:var(--brand-700);border-color:var(--brand-700);}
.btn-outline:hover{background:var(--brand-700);color:#fff;}
.btn-sm{padding:10px 20px;font-size:14px;min-height:40px;}
.btn-block{width:100%;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:120;
  height:72px;
  background:rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.16);
  box-shadow:var(--shadow-1);
  transition:background-color .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(246,245,241,.92);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-2);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.logo-mark{
  width:14px;
  height:14px;
  background:var(--accent-500);
  border-radius:3px;
  transform:rotate(45deg);
  flex:0 0 auto;
  transition:background-color .32s var(--ease);
}
.logo-text{
  font-size:19px;
  font-weight:900;
  letter-spacing:-.02em;
  color:#fff;
  transition:color .32s var(--ease);
  line-height:1.2;
}
.site-header.is-scrolled .logo-text{color:var(--ink-900);}
.site-header.is-scrolled .logo-mark{background:var(--brand-700);}

.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 14px;
  font-size:15px;
  font-weight:500;
  color:rgba(255,255,255,.9);
  border-radius:var(--radius-xs);
  transition:color .28s var(--ease),background-color .28s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:2px;
  height:2px;
  background:var(--accent-500);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease);
}
.nav-link:hover{color:#fff;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:#fff;font-weight:700;}
.nav-link.active::after{transform:scaleX(1);}
.site-header.is-scrolled .nav-link{color:var(--muted);}
.site-header.is-scrolled .nav-link:hover,
.site-header.is-scrolled .nav-link.active{color:var(--ink-900);}

.nav-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:44px;
  height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  color:#fff;
  transition:background-color .28s var(--ease),color .28s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.16);}
.site-header.is-scrolled .icon-btn{color:var(--ink-900);}
.site-header.is-scrolled .icon-btn:hover{background:rgba(11,31,26,.08);}

.menu-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:999px;
  position:relative;
  align-items:center;
  justify-content:center;
  flex-direction:column;
}
.menu-toggle span{
  display:block;
  width:20px;
  height:2px;
  background:#fff;
  border-radius:2px;
  transition:transform .32s var(--ease),background-color .32s var(--ease),opacity .32s var(--ease);
}
.menu-toggle span+span{margin-top:6px;}
.site-header.is-scrolled .menu-toggle span{background:var(--ink-900);}
body.nav-open .menu-toggle span{background:#fff;}
body.nav-open .menu-toggle span:first-child{transform:translateY(4px) rotate(45deg);}
body.nav-open .menu-toggle span:last-child{transform:translateY(-4px) rotate(-45deg);}
.nav-drawer-extra{display:none;}

/* ---------- 分类 Hero ---------- */
.hero-cat{
  position:relative;
  min-height:56vh;
  display:flex;
  align-items:flex-end;
  padding:150px 0 56px;
  background-color:var(--brand-900);
  background-image:linear-gradient(180deg,rgba(11,31,26,.72) 0%,rgba(11,31,26,.9) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  color:#fff;
  overflow:hidden;
}
.hero-cat::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.hero-cat .hero-inner{position:relative;z-index:2;width:100%;}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent-500);
  padding:6px 12px;
  border:1px solid rgba(198,242,78,.4);
  border-radius:var(--radius-xs);
  margin-bottom:22px;
}
.hero-cat h1{
  font-size:clamp(32px,6vw,64px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.14;
  max-width:14em;
}
.hero-cat .hero-sub{
  margin-top:18px;
  font-size:17px;
  line-height:1.85;
  color:rgba(255,255,255,.82);
  max-width:36em;
}
.hero-index{
  position:absolute;
  top:96px;
  right:24px;
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.08em;
  color:rgba(255,255,255,.65);
  z-index:2;
}
.hero-rule{
  margin-top:36px;
  height:1px;
  background:rgba(255,255,255,.24);
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:28px;
  margin-top:20px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:rgba(255,255,255,.66);
}
.hero-meta b{color:#fff;font-weight:500;}

/* ---------- 页内锚点 ---------- */
.anchor-bar{
  position:sticky;
  top:72px;
  z-index:80;
  background:rgba(246,245,241,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.anchor-scroll{
  display:flex;
  gap:8px;
  overflow-x:auto;
  padding-top:12px;
  padding-bottom:12px;
  scrollbar-width:none;
}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-scroll a{
  flex:0 0 auto;
  padding:8px 16px;
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:var(--muted);
  border:1px solid var(--line);
  background:var(--surface);
  transition:color .24s var(--ease),background-color .24s var(--ease),border-color .24s var(--ease);
}
.anchor-scroll a:hover{color:var(--brand-900);border-color:var(--brand-500);background:#fff;}

/* ---------- 板块通用 ---------- */
.section{padding:112px 0;}
.section-tight{padding:80px 0;}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
[id]{scroll-margin-top:150px;}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.12em;
  color:var(--brand-500);
  margin-bottom:16px;
  text-transform:uppercase;
}
.sec-head{max-width:760px;margin-bottom:56px;}
.sec-head h2{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.22;
}
.sec-desc{
  margin-top:18px;
  color:var(--muted);
  font-size:17px;
  line-height:1.9;
}
.rule{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 引言块 ---------- */
.quote-band{padding:104px 0 88px;background:var(--bg-000);border-bottom:1px solid var(--line);}
.quote-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.quote{
  font-family:var(--font-serif);
  font-size:clamp(24px,3vw,34px);
  line-height:1.68;
  font-weight:400;
  letter-spacing:-.01em;
  color:var(--ink-900);
  max-width:22em;
}
.quote-note{
  margin-top:26px;
  font-size:15px;
  color:var(--muted);
  line-height:1.9;
  max-width:32em;
}
.quote-figure{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-2);background:var(--surface);}
.quote-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .6s var(--ease);}
.quote-figure:hover img{transform:scale(1.04);}

/* ---------- 图文章节 ---------- */
.figure-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.figure-media{
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:var(--surface);
  box-shadow:var(--shadow-2);
}
.figure-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .6s var(--ease);}
.figure-media:hover img{transform:scale(1.04);}
.figure-cap{
  margin-top:12px;
  font-size:13px;
  color:var(--muted);
  font-family:var(--font-mono);
  letter-spacing:.04em;
}
.figure-text h3{
  font-size:24px;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:18px;
  line-height:1.4;
}
.figure-text p{color:var(--muted);margin-bottom:18px;}
.figure-text p:last-of-type{margin-bottom:0;}

.step-list{margin-top:28px;border-top:1px solid var(--line);}
.step-list li{
  display:flex;
  gap:18px;
  padding:18px 0;
  border-bottom:1px solid var(--line);
}
.step-num{
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--brand-500);
  letter-spacing:.06em;
  flex:0 0 auto;
  padding-top:4px;
}
.step-body strong{display:block;font-size:17px;font-weight:700;margin-bottom:6px;}
.step-body span{color:var(--muted);font-size:15.5px;line-height:1.85;}

/* ---------- 卡片 ---------- */
.card-grid{margin-top:8px;}
.info-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:32px 28px;
  height:100%;
  display:flex;
  flex-direction:column;
  transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease);
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#d6d5cd;}
.card-icon{
  width:44px;
  height:44px;
  border-radius:12px;
  background:rgba(198,242,78,.28);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--brand-700);
  margin-bottom:20px;
}
.info-card h3{font-size:21px;font-weight:700;letter-spacing:-.01em;margin-bottom:12px;line-height:1.4;}
.info-card p{color:var(--muted);font-size:16px;line-height:1.88;}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;}
.badge{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  padding:4px 10px;
  border-radius:var(--radius-xs);
  background:rgba(198,242,78,.22);
  color:var(--brand-900);
  font-weight:500;
  letter-spacing:.02em;
}
.badge-warm{background:rgba(210,98,47,.12);color:#8b3d17;}

/* ---------- 细线列表 ---------- */
.note-list{border-top:1px solid var(--line);}
.note-list li{
  display:grid;
  grid-template-columns:200px 1fr;
  gap:32px;
  padding:28px 0;
  border-bottom:1px solid var(--line);
}
.note-list .note-key{
  font-weight:700;
  font-size:17px;
  letter-spacing:-.01em;
}
.note-list .note-key span{
  display:block;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:400;
  color:var(--warm-500);
  letter-spacing:.08em;
  margin-bottom:6px;
}
.note-list .note-val{color:var(--muted);font-size:16px;line-height:1.9;}

/* ---------- FAQ ---------- */
.faq-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:40px;}
.faq-head h2{font-size:clamp(28px,3.4vw,44px);font-weight:900;letter-spacing:-.02em;line-height:1.22;}
.faq-head p{color:var(--muted);font-size:16px;max-width:34em;margin-top:14px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:flex-start;
  gap:20px;
  text-align:left;
  padding:26px 0;
  min-height:44px;
  transition:color .24s var(--ease);
}
.faq-q:hover .faq-text{color:var(--brand-700);}
.faq-num{
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.06em;
  color:var(--brand-500);
  flex:0 0 auto;
  padding-top:5px;
}
.faq-text{
  flex:1 1 auto;
  font-size:19px;
  font-weight:700;
  line-height:1.5;
  letter-spacing:-.01em;
  transition:color .24s var(--ease);
}
.faq-icon{
  position:relative;
  flex:0 0 auto;
  width:22px;
  height:22px;
  margin-top:6px;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--brand-700);
  transition:transform .32s var(--ease),background-color .32s var(--ease);
}
.faq-icon::before{left:0;top:10px;width:22px;height:1.5px;}
.faq-icon::after{top:0;left:10px;width:1.5px;height:22px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);}
.faq-item.is-open .faq-icon::before{background:var(--brand-500);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s var(--ease);
}
.faq-a-inner{padding:0 0 28px 44px;}
.faq-a-inner p{color:var(--muted);font-size:16px;line-height:1.92;max-width:58em;}
.faq-a-inner p+p{margin-top:12px;}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--brand-900);
  color:#fff;
  padding:96px 0;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-120px;
  top:-120px;
  width:420px;
  height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(198,242,78,.16),transparent 68%);
  pointer-events:none;
}
.cta-grid{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center;position:relative;z-index:2;}
.cta-band h2{font-size:clamp(26px,3.2vw,40px);font-weight:900;letter-spacing:-.02em;line-height:1.26;}
.cta-band .cta-note{margin-top:16px;color:rgba(255,255,255,.72);font-size:16px;line-height:1.9;max-width:30em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-band .btn-outline{color:#fff;border-color:rgba(255,255,255,.55);}
.cta-band .btn-outline:hover{background:#fff;color:var(--brand-900);border-color:#fff;}
.cta-list{margin-top:26px;display:grid;gap:12px;}
.cta-list li{display:flex;gap:10px;align-items:flex-start;color:rgba(255,255,255,.78);font-size:15px;}
.cta-list li::before{content:"";width:6px;height:6px;margin-top:11px;border-radius:2px;background:var(--accent-500);transform:rotate(45deg);flex:0 0 auto;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--brand-900);
  color:rgba(255,255,255,.72);
  padding:80px 0 28px;
  border-top:1px solid var(--accent-500);
  font-size:15px;
  line-height:1.85;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:56px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .logo-text{color:#fff;}
.footer-brand p{margin:18px 0 20px;color:rgba(255,255,255,.66);max-width:22em;}
.footer-brand .contact{color:rgba(255,255,255,.55);font-size:14px;line-height:1.95;}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  letter-spacing:.02em;
}
.foot-toggle{display:none;font-family:var(--font-mono);color:var(--accent-500);}
.footer-col ul{display:grid;gap:12px;}
.footer-col a{color:rgba(255,255,255,.68);font-size:14px;position:relative;}
.footer-col a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-3px;
  height:1px;
  background:var(--accent-500);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease);
}
.footer-col a:hover{color:#fff;}
.footer-col a:hover::after{transform:scaleX(1);}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  padding-top:26px;
  font-size:13px;
  color:rgba(255,255,255,.5);
  flex-wrap:wrap;
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:48px;
  height:48px;
  border-radius:999px;
  background:var(--brand-700);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--shadow-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .32s var(--ease),transform .32s var(--ease),visibility .32s var(--ease),background-color .24s var(--ease);
  z-index:90;
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand-500);}

/* ---------- 滚动揭示 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px;}
}
@media (max-width:1023px){
  .site-header{height:60px;}
  .nav-inner{height:60px;}
  .logo-text{font-size:17px;}
  .main-nav{
    position:fixed;
    inset:0;
    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:flex-start;
    gap:6px;
    padding:96px 24px 40px;
    background:rgba(11,31,26,.95);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    opacity:0;
    visibility:hidden;
    transition:opacity .32s var(--ease),visibility .32s var(--ease);
  }
  body.nav-open .main-nav{opacity:1;visibility:visible;}
  .nav-link{
    height:auto;
    padding:12px 0;
    font-size:24px;
    font-weight:700;
    color:rgba(255,255,255,.88);
  }
  .nav-link::after{left:0;right:auto;width:28px;bottom:6px;}
  .nav-link.active,.nav-link:hover{color:#fff;}
  .site-header.is-scrolled .nav-link{color:rgba(255,255,255,.88);}
  .site-header.is-scrolled .nav-link.active{color:#fff;}
  .nav-drawer-extra{
    display:block;
    margin-top:28px;
    padding-top:24px;
    border-top:1px solid rgba(255,255,255,.16);
    width:100%;
  }
  .nav-drawer-extra .btn{margin-bottom:14px;}
  .nav-drawer-extra p{color:rgba(255,255,255,.6);font-size:14px;line-height:1.9;}
  .menu-toggle{display:inline-flex;}
  .icon-btn{display:none;}
  .anchor-bar{top:60px;}

  .section{padding:84px 0;}
  .section-tight{padding:64px 0;}
  .quote-band{padding:80px 0 72px;}
  .quote-grid{grid-template-columns:1fr;gap:36px;}
  .figure-block{grid-template-columns:1fr;gap:32px;}
  .figure-media{order:2;}
  .figure-text{order:1;}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .note-list li{grid-template-columns:1fr;gap:10px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:0 32px;padding-bottom:24px;}
  .footer-brand{grid-column:1 / -1;padding-bottom:28px;}
  .footer-col{border-bottom:1px solid rgba(255,255,255,.12);padding:18px 0;}
  .footer-col h4{margin-bottom:0;cursor:pointer;}
  .foot-toggle{display:block;}
  .footer-col ul{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
  .footer-col.open ul{max-height:260px;padding-top:16px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:639px){
  body{font-size:16px;}
  .container{padding-left:20px;padding-right:20px;}
  .hero-cat{min-height:78vh;padding:120px 0 44px;}
  .hero-index{top:78px;right:20px;}
  .section{padding:64px 0;}
  .section-tight{padding:56px 0;}
  .sec-head{margin-bottom:36px;}
  .faq-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:28px;}
  .faq-text{font-size:17px;}
  .faq-a-inner{padding-left:0;padding-bottom:24px;}
  .info-card{padding:26px 22px;}
  .footer-grid{grid-template-columns:1fr;}
  .quote{padding-right:0;}
  .to-top{right:16px;bottom:16px;}
  .hero-meta{gap:16px;}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important;}
  .reveal{opacity:1;transform:none;}
  .info-card:hover,.btn:hover{transform:none;}
  .figure-media:hover img,.quote-figure:hover img{transform:none;}
}

/* roulang page: category5 */
/* ============ 设计变量 ============ */
:root{
  --brand-900:#0B1F1A;
  --brand-700:#0E3A31;
  --brand-500:#17624F;
  --accent-500:#C6F24E;
  --warm-500:#D2622F;
  --bg-000:#F6F5F1;
  --surface:#FFFFFF;
  --line:#E2E1DA;
  --ink-900:#101614;
  --muted:#5C6A65;
  --radius-lg:18px;
  --radius-md:16px;
  --radius-sm:14px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(11,31,26,.05);
  --shadow-2:0 12px 32px -18px rgba(11,31,26,.22);
  --shadow-3:0 28px 60px -30px rgba(11,31,26,.32);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:72px;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  font-weight:400;
  color:var(--ink-900);
  background:var(--bg-000);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-sans);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--ink-900);
}
h1{font-size:clamp(32px,5vw,64px);font-weight:900;line-height:1.12}
h2{font-size:clamp(27px,3.4vw,42px)}
h3{font-size:clamp(20px,2vw,25px)}
h4{font-size:19px}
p{margin:0 0 1.25em}
p:last-child{margin-bottom:0}
a{color:var(--brand-500);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-700)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none;margin:0;padding:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
input,textarea{font:inherit}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent-500);color:var(--brand-900)}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (min-width:1440px){
  .container{max-width:1320px;padding-left:32px;padding-right:32px}
}
.section{padding:112px 0}
.section--tight{padding:84px 0}
.section--paper{background:var(--bg-000)}
.section--white{background:var(--surface)}
.sec-head{max-width:780px;margin-bottom:48px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--brand-500);
  background:rgba(198,242,78,.16);
  border:1px solid var(--line);
  border-radius:6px;
  padding:5px 12px;
  margin-bottom:18px;
}
.sec-lead{font-size:16.5px;color:var(--muted);max-width:640px;margin-top:16px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15.5px;
  font-weight:700;
  line-height:1;
  padding:15px 28px;
  min-height:48px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  cursor:pointer;
  transition:background .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease),transform .28s var(--ease),box-shadow .28s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand-700);color:#fff}
.btn-primary:hover{background:var(--accent-500);color:var(--brand-900);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff;color:#fff}
.btn-outline{background:transparent;color:var(--brand-700);border-color:var(--brand-700)}
.btn-outline:hover{background:var(--brand-700);color:#fff}
.btn-sm{padding:11px 20px;min-height:42px;font-size:14.5px}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:700;
  font-size:15.5px;
  color:var(--brand-500);
  position:relative;
}
.text-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-4px;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.text-link:hover::after{transform:scaleX(1)}
.text-link .arw{transition:transform .3s var(--ease)}
.text-link:hover .arw{transform:translateX(4px)}

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  height:var(--header-h);
  display:flex;
  align-items:center;
  background:rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid rgba(255,255,255,.16);
  box-shadow:var(--shadow-1);
  transition:background .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header .nav-inner{display:flex;align-items:center;gap:28px;width:100%}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-weight:900;
  font-size:17px;
  letter-spacing:-.01em;
  flex-shrink:0;
}
.logo:hover{color:#fff}
.logo-mark{
  width:13px;height:13px;
  background:var(--accent-500);
  transform:rotate(45deg);
  border-radius:3px;
  flex-shrink:0;
}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-link{
  position:relative;
  color:rgba(255,255,255,.86);
  font-size:15px;
  padding:26px 0;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:16px;
  height:2px;
  background:var(--accent-500);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav-link:hover,.nav-link.active{color:#fff}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{font-weight:700}
.nav-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  color:#fff;
  transition:background .24s var(--ease),color .24s var(--ease);
}
.icon-btn:hover{background:rgba(255,255,255,.16)}
.site-header.is-scrolled{
  background:rgba(246,245,241,.92);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-2);
}
.site-header.is-scrolled .logo{color:var(--ink-900)}
.site-header.is-scrolled .nav-link{color:var(--muted)}
.site-header.is-scrolled .nav-link:hover,
.site-header.is-scrolled .nav-link.active{color:var(--ink-900)}
.site-header.is-scrolled .icon-btn{color:var(--ink-900)}
.site-header.is-scrolled .icon-btn:hover{background:rgba(11,31,26,.06)}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  position:relative;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  color:#fff;
}
.menu-toggle span{
  position:absolute;
  left:12px;right:12px;
  height:2px;
  background:currentColor;
  border-radius:2px;
  transition:transform .32s var(--ease),top .32s var(--ease),opacity .2s;
}
.menu-toggle span:nth-child(1){top:17px}
.menu-toggle span:nth-child(2){top:25px}
.menu-toggle[aria-expanded="true"] span:nth-child(1){top:21px;transform:rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){top:21px;transform:rotate(-45deg)}
.site-header.is-scrolled .menu-toggle{color:var(--ink-900)}
@media (max-width:1023px){
  :root{--header-h:60px}
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .nav-actions .btn{display:none}
  .logo{font-size:15.5px}
  .logo-text{max-width:190px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
}
@media (max-width:420px){
  .logo-text{max-width:150px;font-size:14.5px}
}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:99;
  background:rgba(11,31,26,.95);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  padding:96px 24px 40px;
  display:flex;
  flex-direction:column;
  gap:4px;
  transform:translateY(-100%);
  transition:transform .4s var(--ease);
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0)}
.mobile-drawer a{
  color:rgba(255,255,255,.9);
  font-size:23px;
  font-weight:700;
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.mobile-drawer a.active{color:var(--accent-500)}
.mobile-drawer .drawer-foot{
  margin-top:32px;
  color:rgba(255,255,255,.62);
  font-size:14px;
  line-height:2;
}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  min-height:62vh;
  display:flex;
  align-items:flex-end;
  padding:170px 0 0;
  color:#fff;
  overflow:hidden;
  background:var(--brand-900);
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;
  background-position:center;
  opacity:.6;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,31,26,.74) 0%,rgba(11,31,26,.9) 100%);
}
.hero-inner{position:relative;z-index:2;width:100%}
.hero-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom:22px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  color:rgba(255,255,255,.72);
}
.hero-crumb{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.hero-crumb a{color:rgba(255,255,255,.72)}
.hero-crumb a:hover{color:var(--accent-500)}
.hero-crumb .sep{opacity:.5}
.hero-crumb .cur{color:#fff}
.cat-hero h1{color:#fff;max-width:18em}
.hero-sub{
  margin-top:22px;
  max-width:640px;
  font-size:clamp(16px,1.4vw,18px);
  line-height:1.85;
  color:rgba(255,255,255,.82);
}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-stats{
  margin-top:56px;
  border-top:1px solid rgba(255,255,255,.22);
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
}
.hero-stats .stat{
  padding:26px 24px 30px 0;
  border-right:1px solid rgba(255,255,255,.14);
}
.hero-stats .stat:last-child{border-right:0;padding-right:0}
.stat-num{
  display:block;
  font-family:var(--font-mono);
  font-size:34px;
  font-weight:500;
  color:var(--accent-500);
  font-variant-numeric:tabular-nums;
  line-height:1.1;
}
.stat-label{
  display:block;
  margin-top:8px;
  font-size:14px;
  color:rgba(255,255,255,.68);
  letter-spacing:.02em;
}
@media (max-width:639px){
  .cat-hero{min-height:auto;padding-top:130px}
  .hero-stats{grid-template-columns:1fr;border-top:1px solid rgba(255,255,255,.22)}
  .hero-stats .stat{
    border-right:0;
    border-bottom:1px solid rgba(255,255,255,.14);
    padding:18px 0;
  }
  .hero-stats .stat:last-child{border-bottom:0}
  .stat-num{font-size:26px}
}

/* ============ 页内锚点条 ============ */
.anchor-bar{
  position:sticky;
  top:var(--header-h);
  z-index:90;
  background:rgba(246,245,241,.96);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.anchor-scroll{
  display:flex;
  gap:28px;
  overflow-x:auto;
  padding-top:18px;
  padding-bottom:18px;
  scrollbar-width:none;
}
.anchor-scroll::-webkit-scrollbar{display:none}
.anchor-scroll a{
  position:relative;
  flex:0 0 auto;
  font-size:15px;
  font-weight:500;
  color:var(--muted);
  padding:2px 0;
  white-space:nowrap;
}
.anchor-scroll a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-4px;
  height:2px;
  background:var(--accent-500);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.anchor-scroll a:hover{color:var(--ink-900)}
.anchor-scroll a:hover::after{transform:scaleX(1)}

/* ============ 编号目录网格 ============ */
.index-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  column-gap:48px;
  border-top:1px solid var(--line);
}
.index-item{
  display:flex;
  align-items:flex-start;
  gap:18px;
  padding:26px 4px;
  border-bottom:1px solid var(--line);
  color:var(--ink-900);
  transition:background .24s var(--ease),padding .24s var(--ease);
}
.index-item:hover{
  background:var(--surface);
  padding-left:18px;
  padding-right:18px;
  color:var(--ink-900);
}
.index-no{
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.06em;
  color:var(--warm-500);
  padding-top:4px;
  font-variant-numeric:tabular-nums;
}
.index-body{display:block}
.index-body strong{
  display:block;
  font-size:19px;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:5px;
}
.index-body em{
  display:block;
  font-style:normal;
  font-size:14.5px;
  line-height:1.75;
  color:var(--muted);
}
.index-arrow{
  margin-left:auto;
  padding-top:2px;
  color:var(--brand-500);
  transition:transform .3s var(--ease);
}
.index-item:hover .index-arrow{transform:translateX(4px)}
@media (max-width:767px){
  .index-grid{grid-template-columns:1fr;column-gap:0}
  .index-body strong{font-size:17.5px}
}

/* ============ 场景卡片 ============ */
.card-grid{display:grid;gap:24px;grid-template-columns:repeat(3,1fr)}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:transform .32s var(--ease),box-shadow .32s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.card-media{
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg-000);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .6s var(--ease);
}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:24px 22px 26px}
.card-body h3{font-size:20px;margin-bottom:10px}
.card-body p{font-size:15.5px;color:var(--muted);line-height:1.85;margin:0}
.badge{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  padding:4px 10px;
  border-radius:6px;
  background:rgba(198,242,78,.18);
  color:var(--brand-700);
  margin-bottom:14px;
}
.badge--warm{background:rgba(210,98,47,.12);color:#8E3D14}
@media (max-width:1023px){
  .card-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:639px){
  .card-grid{grid-template-columns:1fr}
}

/* ============ 排查流程 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border-top:1px solid var(--line);
}
.step{
  padding:32px 26px 32px 0;
  border-right:1px solid var(--line);
  position:relative;
}
.step:last-child{border-right:0}
.step-no{
  display:block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--brand-500);
  margin-bottom:16px;
}
.step h3{font-size:20px;margin-bottom:10px}
.step p{font-size:15px;color:var(--muted);line-height:1.85;margin:0}
@media (max-width:1023px){
  .steps{grid-template-columns:repeat(2,1fr)}
  .step{padding:26px 22px 26px 0;border-bottom:1px solid var(--line)}
  .step:nth-child(2){border-right:0}
}
@media (max-width:639px){
  .steps{grid-template-columns:1fr}
  .step{border-right:0;padding-right:0}
}

/* ============ 图文区块 ============ */
.split{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:64px;
  align-items:start;
}
.split-media{
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-2);
}
.split-media img{aspect-ratio:16/10;object-fit:cover;width:100%}
.split-caption{
  font-size:13px;
  color:var(--muted);
  margin-top:12px;
  line-height:1.7;
}
.split-body p{color:var(--muted);font-size:16.5px}
.split-body h3{margin:0 0 14px}
.pullquote{
  border-left:3px solid var(--accent-500);
  background:var(--surface);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:22px 26px;
  font-size:17px;
  color:var(--ink-900);
  margin:28px 0;
}
@media (max-width:1023px){
  .split{grid-template-columns:1fr;gap:36px}
}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);margin-top:8px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;
  align-items:flex-start;
  gap:18px;
  width:100%;
  text-align:left;
  padding:24px 0;
  font-size:18px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink-900);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-500)}
.faq-no{
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--warm-500);
  padding-top:5px;
  font-variant-numeric:tabular-nums;
}
.faq-ico{
  margin-left:auto;
  flex-shrink:0;
  width:24px;height:24px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  border:1px solid var(--line);
  color:var(--brand-500);
  transition:transform .32s var(--ease),background .32s var(--ease),border-color .32s var(--ease);
}
.faq-item.is-open .faq-ico{
  transform:rotate(45deg);
  background:var(--accent-500);
  border-color:var(--accent-500);
  color:var(--brand-900);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s var(--ease);
}
.faq-a-inner{
  padding:0 46px 26px 44px;
  color:var(--muted);
  font-size:16px;
  line-height:1.9;
}
@media (max-width:639px){
  .faq-q{font-size:16.5px;gap:12px}
  .faq-a-inner{padding-left:32px;padding-right:8px}
}

/* ============ CTA 通栏 ============ */
.cta-band{
  background:var(--brand-900);
  color:#fff;
  padding:88px 0;
}
.cta-inner{
  display:grid;
  grid-template-columns:6fr 6fr;
  gap:56px;
  align-items:center;
}
.cta-band h2{color:#fff}
.cta-band .cta-note{
  color:rgba(255,255,255,.7);
  font-size:15.5px;
  margin-top:16px;
  line-height:1.85;
}
.cta-panel{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.16);border-radius:var(--radius-lg);padding:32px}
.cta-panel h3{color:#fff;font-size:20px;margin-bottom:10px}
.cta-panel p{color:rgba(255,255,255,.72);font-size:15px;margin-bottom:20px}
.field-label{display:block;font-size:13px;color:rgba(255,255,255,.66);margin-bottom:8px}
.field-input{
  width:100%;
  height:52px;
  padding:0 16px;
  border-radius:6px;
  border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.06);
  color:#fff;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.field-input::placeholder{color:rgba(255,255,255,.42)}
.field-input:focus{
  outline:none;
  border-color:var(--accent-500);
  box-shadow:0 0 0 2px var(--accent-500);
}
.field-row{display:flex;gap:12px;margin-top:18px}
.field-row .btn{flex-shrink:0}
.form-tip{font-size:12.5px;color:rgba(255,255,255,.5);margin-top:12px;line-height:1.7}
@media (max-width:1023px){
  .cta-inner{grid-template-columns:1fr;gap:36px}
  .cta-band{padding:64px 0}
}
@media (max-width:559px){
  .field-row{flex-direction:column}
  .field-row .btn{width:100%}
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--brand-900);
  color:rgba(255,255,255,.72);
  border-top:1px solid var(--accent-500);
  padding:72px 0 0;
  font-size:15px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:56px;
}
.site-footer .logo{color:#fff;font-size:16.5px;margin-bottom:16px}
.site-footer .logo:hover{color:#fff}
.footer-brand p{
  color:rgba(255,255,255,.66);
  font-size:14.5px;
  margin-bottom:18px;
  max-width:280px;
}
.footer-brand .contact{
  font-size:13.5px;
  line-height:2;
  color:rgba(255,255,255,.52);
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  letter-spacing:.01em;
}
.foot-toggle{display:none;font-family:var(--font-mono);color:var(--accent-500)}
.footer-col ul li{margin-bottom:12px}
.footer-col ul a{
  color:rgba(255,255,255,.68);
  font-size:14.5px;
  transition:color .2s var(--ease);
}
.footer-col ul a:hover{color:var(--accent-500)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.52);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
  .footer-brand p{max-width:none}
}
@media (max-width:639px){
  .site-footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:0;padding-bottom:32px}
  .footer-col{border-bottom:1px solid rgba(255,255,255,.12)}
  .footer-col h4{margin-bottom:0;padding:16px 0;cursor:pointer}
  .foot-toggle{display:inline}
  .footer-col ul{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
  .footer-col.is-open ul{max-height:320px;padding-bottom:14px}
  .footer-col.is-open .foot-toggle{color:var(--warm-500)}
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;
  right:22px;
  bottom:22px;
  width:48px;height:48px;
  border-radius:50%;
  background:var(--brand-700);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--shadow-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s;
  z-index:80;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--accent-500);color:var(--brand-900)}

/* ============ 滚动揭示 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}