/* roulang page: index */
:root{
  --ink:#0C1613;
  --lime:#C7F04A;
  --orange:#FF5A2B;
  --bg:#F6F5F1;
  --card:#FFFFFF;
  --text:#12140F;
  --muted:#5C635B;
  --weak:#8C948B;
  --line:#E3E5DE;
  --line-dark:rgba(255,255,255,.14);
  --ok:#2FA36B;
  --warn:#E9A23B;
  --err:#D94A3D;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --r-pill:999px;
  --sh:0 1px 2px rgba(12,22,19,.04), 0 8px 24px rgba(12,22,19,.05);
  --sh-h:0 18px 40px rgba(12,22,19,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sp-1:8px;--sp-2:12px;--sp-3:16px;--sp-4:24px;--sp-5:32px;--sp-6:48px;--sp-7:72px;--sp-8:104px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
p{margin:0 0 1.2em;max-width:72ch;}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.25;font-weight:700;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:0;background:none;color:inherit;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:var(--r-s);}

/* ---------- 容器与栅格 ---------- */
.grid-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.grid-x{display:flex;flex-wrap:wrap;}
.grid-margin-x{margin-left:-12px;margin-right:-12px;}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px;}
.cell{width:100%;min-width:0;}
.small-12{width:100%;}
@media screen and (min-width:640px){
  .grid-container{padding-left:32px;padding-right:32px;}
  .medium-4{width:33.3333%;}
  .medium-5{width:41.6667%;}
  .medium-6{width:50%;}
  .medium-7{width:58.3333%;}
  .medium-8{width:66.6667%;}
  .medium-12{width:100%;}
}
@media screen and (min-width:1024px){
  .grid-container{padding-left:48px;padding-right:48px;}
  .large-4{width:33.3333%;}
  .large-5{width:41.6667%;}
  .large-6{width:50%;}
  .large-7{width:58.3333%;}
  .large-8{width:66.6667%;}
  .large-12{width:100%;}
}
@media screen and (min-width:1400px){
  .grid-container{max-width:1320px;}
}

/* ---------- 通用元素 ---------- */
.section{padding:96px 0;}
.section-sm{padding:64px 0;}
.section-light{background:var(--bg);}
.section-white{background:#FFFFFF;}
.section-dark{background:var(--ink);color:#fff;}
.section-dark h2,.section-dark h3{color:#fff;}
.section-dark p{color:rgba(255,255,255,.72);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--muted);text-transform:uppercase;
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--lime);display:block;}
.section-dark .eyebrow{color:rgba(255,255,255,.6);}
.h2{font-size:clamp(22px,3vw,36px);font-weight:700;letter-spacing:-.01em;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head p{color:var(--muted);margin-bottom:0;}
.section-dark .section-head p{color:rgba(255,255,255,.72);}
.num{font-family:"Inter","Space Grotesk",system-ui,sans-serif;font-variant-numeric:tabular-nums;}

.badge{
  display:inline-block;
  padding:6px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  font-size:13px;
  font-weight:600;
  color:var(--muted);
  background:#fff;
}
.chip{
  display:inline-block;
  padding:3px 10px;
  border:1px solid var(--lime);
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  color:#3E5413;
  background:rgba(199,240,74,.22);
  white-space:nowrap;
}

.btn{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;
  padding:0 26px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:700;
  transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  border:1px solid transparent;
}
.btn .arrow{display:inline-block;transition:transform .2s var(--ease);}
.btn:hover .arrow{transform:translateX(4px);}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:#E94A1C;color:#fff;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:rgba(12,22,19,.28);}
.btn-ghost:hover{border-color:var(--ink);background:rgba(12,22,19,.05);}
.btn-lime{background:var(--lime);color:#1B2A10;}
.btn-lime:hover{background:#B6E23A;}
.btn-ghost-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.32);}
.btn-ghost-dark:hover{border-color:var(--lime);color:var(--lime);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 24px rgba(12,22,19,.07);}
.nav-inner{
  display:flex;align-items:center;gap:24px;
  height:68px;
  transition:height .2s var(--ease);
}
.site-header.is-stuck .nav-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:24px;height:24px;border-radius:6px;
  background:var(--lime);
  transform:skewX(-12deg);
  box-shadow:inset -6px -6px 0 rgba(12,22,19,.08);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:22px;margin-left:8px;}
.nav-menu a{
  position:relative;
  font-size:15px;font-weight:500;color:var(--muted);
  padding:6px 0;
  transition:color .18s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--lime);transition:width .22s var(--ease);
}
.nav-menu a:hover{color:var(--text);}
.nav-menu a:hover::after{width:100%;}
.nav-menu a.is-active{color:var(--text);font-weight:700;}
.nav-menu a.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;width:6px;height:6px;margin-top:-3px;
  border-radius:50%;background:var(--lime);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:250px;height:38px;
  padding:0 10px 0 14px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:#fff;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.command-search i{color:var(--weak);font-size:13px;}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--text);
}
.command-search input::placeholder{color:var(--weak);}
.command-search:focus-within{border-color:var(--lime);box-shadow:0 0 0 3px rgba(199,240,74,.28);transform:translateY(-1px);}
.kbd{
  font-family:"Inter",system-ui,sans-serif;font-size:11px;font-weight:700;
  color:var(--weak);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;background:var(--bg);white-space:nowrap;
}
.icon-btn{
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);background:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--muted);font-size:14px;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.icon-btn:hover{color:var(--text);border-color:var(--lime);background:rgba(199,240,74,.16);}
.nav-cta{height:36px;min-height:36px;padding:0 18px;font-size:14px;}
.nav-toggle{
  display:none;width:38px;height:38px;border-radius:var(--r-s);
  border:1px solid var(--line);background:#fff;color:var(--text);
  align-items:center;justify-content:center;
}
.mobile-drawer{
  position:fixed;inset:0;z-index:80;
  background:rgba(12,22,19,.97);
  padding:88px 28px 40px;
  display:none;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;color:#fff;font-size:19px;font-weight:600;
  padding:16px 0;border-bottom:1px solid var(--line-dark);
}
.mobile-drawer a:hover{color:var(--lime);}
.drawer-close{
  position:absolute;top:22px;right:22px;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line-dark);color:#fff;font-size:16px;
  display:flex;align-items:center;justify-content:center;
}
@media screen and (max-width:1023px){
  .nav-menu{display:none;}
  .command-search{display:none;}
  .nav-toggle{display:inline-flex;}
}
@media screen and (max-width:519px){
  .brand-text{font-size:15px;white-space:normal;line-height:1.3;}
  .nav-cta{padding:0 14px;}
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:
    radial-gradient(900px 420px at 88% -10%, rgba(199,240,74,.22), transparent 62%),
    var(--bg);
  padding:72px 0 0;
  overflow:hidden;
}
.hero-copy{padding-bottom:56px;}
.hero h1{
  font-size:clamp(30px,4.6vw,56px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
  margin:18px 0 18px;
}
.hero-sub{
  font-size:17px;
  color:var(--muted);
  max-width:56ch;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:36px;}
.stats{display:flex;flex-wrap:wrap;gap:12px;}
.stat{
  flex:1 1 150px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:14px 18px;
  box-shadow:var(--sh);
}
.stat b{
  display:block;
  font-family:"Inter","Space Grotesk",system-ui,sans-serif;
  font-size:28px;font-weight:700;line-height:1.1;letter-spacing:-.02em;
}
.stat span{font-size:13px;color:var(--weak);}
.hero-media{position:relative;padding-bottom:40px;}
.hero-media img{
  width:100%;height:auto;
  border-radius:var(--r-l);
  box-shadow:var(--sh-h);
  border:1px solid var(--line);
}
.hero-media::after{
  content:"";position:absolute;right:-14px;bottom:24px;
  width:58%;height:64%;border:1px solid var(--lime);
  border-radius:var(--r-l);z-index:-1;
}
.hero-line{height:6px;background:rgba(12,22,19,.06);}
.hero-line span{display:block;height:6px;width:42%;background:var(--lime);}
@media screen and (min-width:1024px){
  .hero{padding-top:88px;}
  .hero-media{padding-bottom:64px;}
  .hero-media img{margin-right:-4%;width:104%;}
}

/* ---------- 快捷入口 ---------- */
.quick-bar{padding:28px 0;border-bottom:1px solid var(--line);background:#fff;}
.quick-scroll{display:flex;gap:12px;overflow-x:auto;padding-bottom:4px;scrollbar-width:thin;}
.quick-item{
  flex:0 0 auto;
  display:flex;align-items:center;gap:10px;
  padding:10px 18px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:#fff;
  font-size:14px;font-weight:600;color:var(--muted);
  transition:all .2s var(--ease);
}
.quick-item i{color:#6F7C55;}
.quick-item:hover{color:var(--text);border-color:var(--lime);background:rgba(199,240,74,.16);transform:translateY(-2px);}

/* ---------- 玩法交错 ---------- */
.play-row{display:flex;flex-wrap:wrap;align-items:center;gap:32px;margin-bottom:64px;}
.play-row:last-child{margin-bottom:0;}
.play-row .play-text{flex:1 1 420px;min-width:0;}
.play-row .play-media{flex:1 1 380px;min-width:0;}
.play-row.reverse{flex-direction:row-reverse;}
.play-index{
  font-family:"Inter","Space Grotesk",system-ui,sans-serif;
  font-size:32px;font-weight:700;color:var(--lime);
  -webkit-text-stroke:1px rgba(12,22,19,.35);
  display:block;margin-bottom:8px;line-height:1;
}
.play-media img{
  width:100%;border-radius:var(--r-m);border:1px solid var(--line);
  box-shadow:var(--sh);transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.play-media img:hover{transform:translateY(-2px);box-shadow:var(--sh-h);}
.play-text h3{font-size:22px;margin-bottom:10px;}
.play-text p{color:var(--muted);margin-bottom:12px;}
.tick-list li{
  position:relative;padding-left:20px;font-size:14px;color:var(--muted);
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;
  background:var(--lime);transform:skewX(-12deg);
}

/* ---------- 奖励预览 ---------- */
.reward-grid{display:flex;flex-wrap:wrap;gap:24px;}
.reward-big{flex:1 1 520px;min-width:0;}
.reward-small{flex:1 1 280px;min-width:0;display:flex;flex-direction:column;gap:24px;}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  box-shadow:var(--sh);
  overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);}
.reward-big .card{height:100%;display:flex;flex-direction:column;}
.reward-big img{width:100%;height:280px;object-fit:cover;}
.card-body{padding:26px;flex:1;}
.card-body h3{font-size:22px;margin-bottom:10px;}
.card-body p{color:var(--muted);font-size:15px;margin-bottom:0;}
.mini{display:flex;gap:18px;align-items:center;padding:20px;}
.mini img{width:104px;height:80px;object-fit:cover;border-radius:var(--r-s);flex:0 0 auto;}
.mini h4{font-size:17px;margin-bottom:4px;}
.mini p{font-size:13px;color:var(--muted);margin-bottom:0;}

/* ---------- 任务进度（深底） ---------- */
.progress-panel{
  background:rgba(255,255,255,.06);
  border:1px solid var(--line-dark);
  border-radius:var(--r-l);
  padding:32px;
}
.progress-top{display:flex;flex-wrap:wrap;gap:12px;align-items:baseline;justify-content:space-between;margin-bottom:22px;}
.progress-top .value{
  font-family:"Inter","Space Grotesk",system-ui,sans-serif;
  font-size:34px;font-weight:700;color:var(--lime);letter-spacing:-.02em;
}
.progress-track{position:relative;height:6px;border-radius:var(--r-pill);background:rgba(255,255,255,.16);overflow:hidden;}
.progress-fill{height:6px;width:0;border-radius:var(--r-pill);background:var(--lime);transition:width .6s var(--ease);}
.progress-nodes{display:flex;justify-content:space-between;margin-top:18px;gap:12px;}
.progress-nodes div{font-size:13px;color:rgba(255,255,255,.72);}
.progress-nodes div b{display:block;color:#fff;font-size:14px;margin-bottom:2px;}
.progress-nodes div.done b{color:var(--lime);}

/* ---------- CTA + 表单 ---------- */
.cta-panel{
  background:var(--ink);
  border-radius:var(--r-l);
  padding:40px;
  color:#fff;
  display:flex;
  flex-wrap:wrap;
  gap:36px;
  align-items:center;
}
.cta-panel .cta-copy{flex:1 1 340px;min-width:0;}
.cta-panel h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
.cta-panel p{color:rgba(255,255,255,.72);margin-bottom:0;font-size:15px;}
.cta-form{flex:1 1 380px;min-width:0;display:flex;flex-wrap:wrap;gap:12px;}
.field{flex:1 1 160px;min-width:0;}
.field label{display:block;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:6px;}
.field input{
  width:100%;height:44px;
  padding:0 14px;
  border-radius:var(--r-s);
  border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);
  color:#fff;outline:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder{color:rgba(255,255,255,.42);}
.field input:focus{border-color:var(--lime);box-shadow:0 0 0 3px rgba(199,240,74,.22);}
.cta-form .btn{flex:0 0 auto;}
.form-note{flex:1 1 100%;font-size:13px;color:rgba(255,255,255,.55);margin:0;}

/* ---------- 资讯卡片 ---------- */
.info-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);
  overflow:hidden;box-shadow:var(--sh);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--sh-h);}
.info-thumb{overflow:hidden;aspect-ratio:16/9;background:var(--bg);}
.info-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.info-card:hover .info-thumb img{transform:scale(1.03);}
.info-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.info-title{
  font-size:18px;font-weight:700;line-height:1.45;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.info-sum{
  font-size:14px;color:var(--muted);margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.info-meta{
  display:flex;align-items:center;gap:10px;margin-top:auto;
  padding-top:14px;border-top:1px dashed var(--line);
}
.info-meta .time{font-family:"Inter",system-ui,sans-serif;font-size:12px;color:var(--weak);font-variant-numeric:tabular-nums;}
.info-meta .go{margin-left:auto;color:var(--orange);font-weight:700;transition:transform .2s var(--ease);}
.info-card:hover .go{transform:translateX(4px);}
.empty-state{
  min-height:180px;border:1px dashed var(--line);border-radius:var(--r-m);
  background:#FAF9F5;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;text-align:center;padding:32px;
}
.empty-state i{font-size:26px;color:var(--weak);}
.empty-state p{color:var(--muted);margin:0;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);
  box-shadow:var(--sh);overflow:hidden;
}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;gap:16px;
  padding:20px 22px;
  font-size:17px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";margin-left:auto;flex:0 0 auto;
  width:24px;height:24px;border-radius:50%;
  background:var(--lime);color:#1B2A10;font-weight:700;
  display:flex;align-items:center;justify-content:center;font-size:15px;
  transition:transform .2s var(--ease);
}
.faq-item[open] summary::after{content:"−";}
.faq-item .faq-body{padding:0 22px 22px;font-size:15px;color:var(--muted);line-height:1.9;}
.faq-item .faq-body p{margin-bottom:0;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff;border-top:1px solid var(--line-dark);}
.footer-main{padding:72px 0 40px;}
.footer-grid{display:flex;flex-wrap:wrap;gap:36px;}
.footer-col{flex:1 1 200px;min-width:0;}
.footer-col h4{font-size:14px;letter-spacing:.08em;color:rgba(255,255,255,.6);font-weight:700;margin-bottom:16px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-text{color:#fff;font-size:16px;white-space:normal;}
.footer-col p{font-size:14px;color:rgba(255,255,255,.66);margin-bottom:0;}
.footer-links li{margin-bottom:10px;}
.footer-links a,.footer-contact li{font-size:14px;color:rgba(255,255,255,.72);transition:color .18s var(--ease);}
.footer-links a:hover{color:var(--lime);}
.footer-contact li{margin-bottom:10px;display:flex;gap:10px;align-items:flex-start;}
.footer-contact i{color:var(--lime);margin-top:5px;font-size:12px;}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:20px 0;
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
}
.footer-bottom p{margin:0;font-size:13px;color:rgba(255,255,255,.55);}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.72);
  border:1px solid var(--line-dark);border-radius:var(--r-pill);
  padding:7px 16px;transition:all .2s var(--ease);
}
.to-top:hover{color:var(--ink);background:var(--lime);border-color:var(--lime);}

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

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}
@media screen and (max-width:519px){
  .section{padding:64px 0;}
  .hero-copy{padding-bottom:36px;}
  .cta-panel{padding:28px 22px;}
  .progress-panel{padding:24px 20px;}
  .mini{flex-direction:column;align-items:flex-start;}
  .mini img{width:100%;height:150px;}
}

/* roulang page: article */
:root{
  --ink:#12140F;
  --ink-2:#5C635B;
  --ink-3:#8C948B;
  --bg:#F6F5F1;
  --bg-sand:#EFEDE6;
  --card:#FFFFFF;
  --dark:#0C1613;
  --lime:#C7F04A;
  --orange:#FF5A2B;
  --orange-dark:#E8461A;
  --line:#E3E5DE;
  --line-dark:rgba(255,255,255,.14);
  --ok:#2FA36B;
  --warn:#E9A23B;
  --err:#D94A3D;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,22,19,.04),0 8px 24px rgba(12,22,19,.05);
  --sh-2:0 18px 40px rgba(12,22,19,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-num:"Inter","Space Grotesk",system-ui,sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding-left:0;list-style:none;}
::selection{background:var(--lime);color:var(--dark);}
.grid-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){.grid-container{padding-left:32px;padding-right:32px;}}
@media (min-width:1024px){.grid-container{padding-left:48px;padding-right:48px;}}
@media (min-width:1400px){.grid-container{max-width:1320px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:height .2s var(--ease);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
  transition:height .2s var(--ease);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  width:22px;
  height:22px;
  border-radius:6px;
  background:var(--lime);
  transform:skewX(-12deg);
  display:inline-block;
  flex:0 0 auto;
}
.brand-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink);
  white-space:nowrap;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:26px;
}
.nav-menu a{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  padding:6px 0;
  transition:color .18s var(--ease);
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  background:var(--lime);
  transition:width .2s var(--ease);
}
.nav-menu a:hover{color:var(--ink);}
.nav-menu a:hover::after{width:100%;}
.nav-menu a.is-active{color:var(--ink);}
.nav-menu a.is-active::before{
  content:"";
  position:absolute;
  left:-13px;
  top:50%;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--lime);
  transform:translateY(-50%);
}
.nav-right{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:250px;
  height:38px;
  padding:0 10px 0 14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search i{color:var(--ink-3);font-size:13px;}
.command-search input{
  flex:1 1 auto;
  min-width:0;
  border:0;
  outline:0;
  background:transparent;
  font-size:14px;
  color:var(--ink);
}
.command-search input::placeholder{color:var(--ink-3);}
.command-search:focus-within{
  border-color:var(--lime);
  transform:translateY(-1px);
  box-shadow:0 8px 20px rgba(12,22,19,.07);
}
.kbd{
  font-family:var(--font-num);
  font-size:11px;
  line-height:1;
  color:var(--ink-3);
  border:1px solid var(--line);
  border-radius:6px;
  padding:4px 6px;
  white-space:nowrap;
}
.icon-btn{
  width:32px;
  height:32px;
  border-radius:50%;
  border:1px solid var(--line);
  background:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--ink-2);
  font-size:14px;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{border-color:var(--lime);color:var(--ink);transform:translateY(-1px);}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,90,43,.28);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-1px);}
.btn-light{background:var(--lime);color:var(--dark);}
.btn-light:hover{background:#B8E23A;transform:translateY(-1px);}
.btn-outline-light{background:transparent;color:#fff;border-color:var(--line-dark);}
.btn-outline-light:hover{border-color:var(--lime);color:var(--lime);transform:translateY(-1px);}
.nav-cta{height:36px;padding:0 18px;font-size:14px;}
.nav-toggle{
  display:none;
  width:38px;
  height:38px;
  border-radius:var(--r-s);
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink);
  font-size:16px;
  align-items:center;
  justify-content:center;
}
.nav-toggle:hover{border-color:var(--lime);}

/* ============ 面包屑与文章头 ============ */
.page-main{padding-bottom:0;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-3);
  padding:26px 0 0;
  line-height:1.7;
}
.breadcrumb a{color:var(--ink-3);transition:color .18s var(--ease);}
.breadcrumb a:hover{color:var(--ink);}
.breadcrumb span.sep{color:#C6CAC0;}
.breadcrumb .current{color:var(--ink-2);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
@media (max-width:640px){.breadcrumb .current{white-space:normal;}}

.article-hero{padding:22px 0 0;}
.article-head{
  display:flex;
  flex-wrap:wrap;
  gap:32px;
  align-items:flex-end;
  justify-content:space-between;
  padding-bottom:28px;
  border-bottom:1px dotted var(--line);
}
.article-head-main{flex:1 1 560px;min-width:0;}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  padding:5px 12px;
  border-radius:var(--r-pill);
  border:1px solid rgba(199,240,74,.85);
  background:rgba(199,240,74,.18);
  color:#3F4A20;
}
.article-head h1{
  font-size:clamp(28px,4.2vw,46px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.18;
  margin:18px 0 0;
  color:var(--ink);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-meta-card{
  flex:0 0 260px;
  max-width:100%;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  box-shadow:var(--sh-1);
  padding:16px 18px;
}
.article-meta-card dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:13px;}
.article-meta-card dt{color:var(--ink-3);}
.article-meta-card dd{margin:0;color:var(--ink);font-family:var(--font-num);font-weight:600;}
.progress-line{
  height:6px;
  width:100%;
  background:var(--bg-sand);
  border-radius:var(--r-pill);
  margin-top:22px;
  overflow:hidden;
}
.progress-line span{
  display:block;
  height:100%;
  width:38%;
  background:var(--lime);
  border-radius:var(--r-pill);
  transition:width .6s var(--ease);
}

/* ============ 正文 ============ */
.article-main{padding:56px 0 72px;}
.article-wrap{max-width:760px;margin:0 auto;}
.article-body{
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;max-width:72ch;}
.article-body h2{
  font-size:clamp(20px,2.4vw,27px);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.4;
  margin:40px 0 16px;
  padding-left:14px;
  border-left:3px solid var(--lime);
}
.article-body h3{
  font-size:20px;
  font-weight:700;
  line-height:1.5;
  margin:30px 0 12px;
}
.article-body h4{
  font-size:17px;
  font-weight:600;
  margin:24px 0 10px;
}
.article-body ul,.article-body ol{
  margin:0 0 1.2em;
  padding-left:1.35em;
  list-style:disc;
}
.article-body ol{list-style:decimal;}
.article-body li{margin:0 0 .55em;line-height:1.8;}
.article-body li::marker{color:#8AA52F;}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  background:var(--bg-sand);
  border-left:3px solid var(--lime);
  border-radius:0 var(--r-s) var(--r-s) 0;
  color:var(--ink-2);
  font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  width:100%;
  border-radius:var(--r-m);
  margin:24px 0 10px;
}
.article-body figure{margin:24px 0;}
.article-body figcaption{
  font-size:13px;
  color:var(--ink-3);
  text-align:center;
  margin-top:2px;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
}
.article-body th,.article-body td{
  border-bottom:1px solid var(--line);
  padding:11px 12px;
  text-align:left;
  vertical-align:top;
}
.article-body th{
  font-weight:600;
  color:var(--ink);
  border-bottom-color:#CDD2C6;
}
.article-body td{color:var(--ink-2);}
.article-body a{
  color:#3E5A12;
  border-bottom:1px solid rgba(199,240,74,.9);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.article-body a:hover{color:var(--ink);border-color:var(--ink);}
.article-body hr{border:0;border-top:1px dotted var(--line);margin:34px 0;}
.article-body code{
  font-family:var(--font-num);
  font-size:14px;
  background:var(--bg-sand);
  padding:2px 6px;
  border-radius:6px;
}

.empty-state{
  background:var(--bg-sand);
  border:1px dotted var(--line);
  border-radius:var(--r-l);
  padding:48px 28px;
  text-align:center;
}
.empty-state i{font-size:26px;color:var(--ink-3);}
.empty-state h2{
  font-size:22px;
  font-weight:700;
  margin:14px 0 8px;
  padding:0;
  border:0;
}
.empty-state p{color:var(--ink-2);font-size:15px;margin:0 auto 20px;max-width:52ch;}

/* ============ 标签 ============ */
.article-tags{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-top:40px;
  padding-top:24px;
  border-top:1px dotted var(--line);
}
.article-tags .label{
  font-size:12px;
  color:var(--ink-3);
  letter-spacing:.06em;
}
.tag{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:#fff;
  font-size:13px;
  color:var(--ink-2);
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.tag:hover{border-color:var(--lime);color:var(--ink);transform:translateY(-1px);}

/* ============ 相关推荐 ============ */
.article-related{
  background:var(--bg);
  padding:64px 0 84px;
  border-top:1px solid var(--line);
}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:34px;
}
.section-head h2{
  font-size:clamp(22px,3vw,34px);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.25;
}
.section-head p{
  color:var(--ink-2);
  font-size:14.5px;
  max-width:56ch;
  margin-top:10px;
}
.card-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);}}
.card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D7DBCF;}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg-sand);
}
.card-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:20px 20px 18px;display:flex;flex-direction:column;flex:1 1 auto;}
.card-body h3{
  font-size:18px;
  font-weight:700;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-body p{
  margin-top:10px;
  font-size:14px;
  line-height:1.75;
  color:var(--ink-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-foot{
  margin-top:auto;
  padding:14px 20px;
  border-top:1px dotted var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.chip{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:var(--r-pill);
  border:1px solid rgba(199,240,74,.85);
  background:rgba(199,240,74,.16);
  color:#3F4A20;
  font-size:12px;
  font-weight:600;
}
.card-foot time{font-family:var(--font-num);font-size:13px;color:var(--ink-3);}
.card-foot .arrow{
  color:var(--ink-3);
  font-size:13px;
  transition:transform .2s var(--ease),color .2s var(--ease);
}
.card:hover .card-foot .arrow{transform:translateX(4px);color:var(--ink);}

.back-row{margin-top:36px;}

/* ============ CTA 通栏 ============ */
.cta-band{
  background:var(--dark);
  color:#fff;
  padding:88px 0;
}
.cta-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-text{flex:1 1 520px;min-width:0;}
.cta-text .eyebrow{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--lime);
}
.cta-text h2{
  font-size:clamp(24px,3.2vw,38px);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.25;
  margin:14px 0 12px;
  color:#fff;
}
.cta-text p{
  color:rgba(255,255,255,.72);
  font-size:15.5px;
  max-width:60ch;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  flex:0 0 auto;
}
.cta-strip{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--line-dark);
  display:flex;
  flex-wrap:wrap;
  gap:28px 48px;
}
.cta-strip div{display:flex;flex-direction:column;gap:2px;}
.cta-strip strong{
  font-family:var(--font-num);
  font-size:26px;
  font-weight:700;
  color:var(--lime);
  line-height:1.2;
}
.cta-strip span{font-size:13px;color:rgba(255,255,255,.62);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--dark);
  color:#fff;
  border-top:1px solid var(--line-dark);
}
.footer-main{padding:72px 0 40px;}
.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:2fr 1fr 1fr 1.2fr;gap:48px;}}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand .brand-text{color:#fff;}
.footer-col p{
  color:rgba(255,255,255,.68);
  font-size:14px;
  line-height:1.8;
  max-width:42ch;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  color:#fff;
  margin-bottom:16px;
}
.footer-links li{margin-bottom:10px;}
.footer-links a{
  font-size:14px;
  color:rgba(255,255,255,.68);
  transition:color .18s var(--ease);
}
.footer-links a:hover{color:var(--lime);}
.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14px;
  color:rgba(255,255,255,.68);
  margin-bottom:12px;
  line-height:1.7;
}
.footer-contact i{color:var(--lime);font-size:13px;margin-top:5px;}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:20px 0 26px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.55);}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(255,255,255,.72);
  transition:color .18s var(--ease);
}
.to-top:hover{color:var(--lime);}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .24s var(--ease),transform .24s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ============ 响应式导航 ============ */
@media (max-width:1023px){
  .nav-menu{
    display:none;
    position:absolute;
    left:0;
    right:0;
    top:100%;
    flex-direction:column;
    align-items:flex-start;
    gap:6px;
    background:#fff;
    border-bottom:1px solid var(--line);
    padding:18px 24px 24px;
    box-shadow:0 18px 40px rgba(12,22,19,.10);
  }
  .nav-menu.is-open{display:flex;}
  .nav-menu a{font-size:16px;padding:10px 0;width:100%;}
  .nav-menu a.is-active::before{left:-14px;}
  .command-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .site-header{position:sticky;}
}
@media (max-width:1023px) and (min-width:640px){
  .nav-menu{padding-left:32px;padding-right:32px;}
}
@media (max-width:639px){
  .nav-inner{height:60px;gap:12px;}
  .brand-text{font-size:15px;}
  .brand-mark{width:19px;height:19px;}
  .nav-cta{padding:0 14px;font-size:13px;height:34px;}
  .icon-btn{display:none;}
  .article-meta-card{flex:1 1 100%;}
  .article-main{padding:40px 0 56px;}
  .cta-band{padding:64px 0;}
  .footer-main{padding:56px 0 32px;}
  .footer-bottom{padding:18px 0 22px;}
  .to-top{width:100%;justify-content:flex-start;}
}

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

/* roulang page: category1 */
:root{
  --deep:#0C1613;
  --lime:#C7F04A;
  --orange:#FF5A2B;
  --bg:#F6F5F1;
  --bg-soft:#EFEDE6;
  --card:#FFFFFF;
  --ink:#12140F;
  --ink-2:#5C635B;
  --ink-3:#8C948B;
  --line:#E3E5DE;
  --line-dark:rgba(255,255,255,.14);
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,22,19,.04),0 8px 24px rgba(12,22,19,.05);
  --sh-2:0 18px 40px rgba(12,22,19,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"Inter","Space Grotesk",system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font:inherit;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;}
.grid-container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:640px){.grid-container{padding-left:32px;padding-right:32px;}}
@media (min-width:1024px){.grid-container{padding-left:48px;padding-right:48px;}}
@media (min-width:1400px){.grid-container{max-width:1320px;}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.nav-inner{
  display:flex;align-items:center;gap:20px;
  height:68px;
  transition:height .22s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:60px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:22px;height:22px;background:var(--lime);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  display:inline-block;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1 1 auto;}
.nav-menu a{
  position:relative;
  display:inline-flex;align-items:center;
  font-size:15px;font-weight:500;color:var(--ink);
  padding:8px 12px;border-radius:var(--r-s);
  transition:color .18s var(--ease);
  white-space:nowrap;
}
.nav-menu a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-menu a:hover::after,.nav-menu a:focus-visible::after{transform:scaleX(1);}
.nav-menu a.is-active{font-weight:700;}
.nav-menu a.is-active::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--lime);margin-right:7px;
}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:250px;height:38px;padding:0 8px 0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:#fff;
  transition:border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search i{color:var(--ink-3);font-size:13px;}
.command-search input{
  flex:1 1 auto;min-width:0;border:0;outline:none;background:transparent;
  font-size:14px;color:var(--ink);
}
.command-search input::placeholder{color:var(--ink-3);}
.command-search:focus-within{
  border-color:var(--lime);
  transform:translateY(-1px);
  box-shadow:0 6px 18px rgba(12,22,19,.06);
}
.kbd{
  font-size:11px;font-weight:700;color:var(--ink-2);
  border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;background:var(--bg-soft);
}
.icon-btn{
  width:34px;height:34px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--ink-2);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.icon-btn:hover{border-color:var(--lime);color:var(--ink);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.btn .fa-arrow-right{transition:transform .2s var(--ease);}
.btn:hover .fa-arrow-right{transform:translateX(4px);}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:#E94A1C;transform:translateY(-1px);}
.btn-ghost{border:1px solid var(--line-dark);color:#fff;}
.btn-ghost:hover{border-color:var(--lime);color:var(--lime);}
.btn-dark-ghost{border:1px solid var(--ink);color:var(--ink);}
.btn-dark-ghost:hover{border-color:var(--lime);background:var(--lime);}
.nav-cta{height:36px;padding:0 18px;font-size:14px;}
.nav-toggle{
  display:none;width:38px;height:38px;border-radius:var(--r-s);
  border:1px solid var(--line);align-items:center;justify-content:center;
  color:var(--ink);font-size:16px;
}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--deep);color:#fff;
  padding:64px 0 72px;
  min-height:250px;
  display:flex;align-items:center;
}
.cat-hero::after{
  content:"";position:absolute;left:0;bottom:0;height:6px;width:34%;
  background:var(--lime);
}
.hero-index{
  position:absolute;right:24px;top:8px;
  font-family:"Inter",var(--font);
  font-size:96px;font-weight:700;line-height:1;
  color:rgba(255,255,255,.08);
  letter-spacing:-.04em;
  pointer-events:none;
  user-select:none;
}
.cat-hero-inner{border-left:1px solid var(--lime);padding-left:24px;max-width:760px;position:relative;}
.crumb{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:14px;}
.crumb a:hover{color:var(--lime);}
.crumb span{margin:0 6px;color:rgba(255,255,255,.35);}
.cat-hero h1{
  font-size:clamp(30px,4.6vw,52px);
  font-weight:800;line-height:1.14;letter-spacing:-.02em;
}
.cat-hero p{
  margin-top:14px;max-width:66ch;
  font-size:15px;color:rgba(255,255,255,.72);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;}
.tag{
  display:inline-flex;align-items:center;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  padding:4px 12px;border-radius:var(--r-pill);
  border:1px solid var(--line-dark);color:rgba(255,255,255,.8);
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section-soft{background:var(--bg-soft);}
.section-white{background:#fff;}
.sec-head{max-width:720px;margin-bottom:44px;}
.sec-head h2{
  font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.24;letter-spacing:-.01em;
}
.sec-head p{margin-top:14px;color:var(--ink-2);font-size:15.5px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--ink-3);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--lime);}
.divider-dot{border:0;border-top:1px dotted var(--line);margin:0;}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:56px;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;left:15px;top:10px;bottom:26px;width:1px;
  background:var(--line);
}
.tl-item{position:relative;padding-bottom:38px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-48px;top:6px;
  width:15px;height:15px;border-radius:50%;
  background:#fff;border:1px solid var(--line);
}
.tl-item.is-key::before{background:var(--lime);border-color:var(--lime);}
.tl-num{
  font-family:"Inter",var(--font);
  font-size:13px;font-weight:700;letter-spacing:.1em;
  color:var(--ink-3);
}
.tl-item h3{font-size:20px;font-weight:700;margin-top:6px;line-height:1.4;}
.tl-item p{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:70ch;}
.tl-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;}
.chip{
  font-size:12.5px;font-weight:600;color:var(--ink-2);
  border:1px solid var(--line);border-radius:var(--r-pill);
  padding:3px 12px;background:#fff;
}

/* ---------- 非对称图文 ---------- */
.split-row{align-items:center;}
.split-media{position:relative;border-radius:var(--r-l);overflow:hidden;box-shadow:var(--sh-1);}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .3s var(--ease);}
.split-media:hover img{transform:scale(1.03);}
.split-media::after{
  content:"";position:absolute;inset:0;
  border:1px solid rgba(12,22,19,.06);border-radius:var(--r-l);
  pointer-events:none;
}
.split-body h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.25;letter-spacing:-.01em;}
.split-body p{margin-top:16px;color:var(--ink-2);font-size:15.5px;}
.mini-list{margin-top:24px;display:grid;gap:14px;}
.mini-list li{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px 20px;border:1px solid var(--line);border-radius:var(--r-m);
  background:#fff;transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.mini-list li:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.mini-list .num{
  font-family:"Inter",var(--font);font-size:22px;font-weight:700;
  color:var(--ink);line-height:1.3;min-width:38px;
}
.mini-list strong{display:block;font-size:16px;font-weight:700;}
.mini-list span{font-size:14px;color:var(--ink-2);}

/* ---------- 对比表 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-m);background:#fff;}
.compare-table{width:100%;border-collapse:collapse;min-width:640px;}
.compare-table thead th{
  font-size:13px;letter-spacing:.08em;font-weight:700;color:var(--ink-3);
  text-align:left;padding:16px 22px;border-bottom:1px solid var(--line);
  background:var(--bg-soft);white-space:nowrap;
}
.compare-table td,.compare-table th{
  padding:18px 22px;border-bottom:1px dotted var(--line);
  text-align:left;vertical-align:top;font-size:15px;color:var(--ink-2);
}
.compare-table tbody tr:last-child td{border-bottom:0;}
.compare-table td:first-child{font-weight:700;color:var(--ink);white-space:nowrap;}
.compare-table tbody tr:hover td{background:#FCFCFA;}

/* ---------- CTA ---------- */
.cta-band{position:relative;background:var(--deep);color:#fff;padding:92px 0;overflow:hidden;}
.cta-band .cta-glow{
  position:absolute;right:-80px;top:-60px;width:280px;height:280px;
  background:rgba(199,240,74,.10);border-radius:50%;filter:blur(6px);
  pointer-events:none;
}
.cta-inner{position:relative;max-width:720px;}
.cta-band h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;line-height:1.24;letter-spacing:-.01em;}
.cta-band p{margin-top:16px;color:rgba(255,255,255,.72);font-size:15.5px;max-width:64ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.cta-points{display:flex;flex-wrap:wrap;gap:28px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line-dark);}
.cta-points div{min-width:130px;}
.cta-points .n{font-family:"Inter",var(--font);font-size:26px;font-weight:700;line-height:1.2;}
.cta-points .l{font-size:13px;color:rgba(255,255,255,.6);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:rgba(255,255,255,.72);border-top:1px solid var(--line-dark);padding-top:72px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:14px;}
.footer-brand .brand-text{font-size:16px;font-weight:700;}
.footer-col p{font-size:14px;line-height:1.8;max-width:34ch;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;transition:color .16s var(--ease);}
.footer-links a:hover{color:var(--lime);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;margin-bottom:10px;}
.footer-contact i{color:var(--lime);margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:52px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  padding:20px 0 26px;font-size:13px;color:rgba(255,255,255,.55);
}
.to-top{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.75);}
.to-top:hover{color:var(--lime);}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .45s var(--ease),transform .45s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-menu{
    position:fixed;left:0;right:0;top:68px;bottom:0;
    display:flex;flex-direction:column;align-items:flex-start;gap:6px;
    background:#fff;padding:28px 24px;
    transform:translateY(-10px);opacity:0;pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease);
    overflow-y:auto;
  }
  .nav-menu.is-open{opacity:1;transform:none;pointer-events:auto;}
  .nav-menu a{font-size:17px;width:100%;padding:14px 4px;border-bottom:1px dotted var(--line);}
  .nav-menu a::after{display:none;}
  .command-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .section{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-band{padding:68px 0;}
}
@media (max-width:767px){
  .hero-index{font-size:72px;right:12px;top:2px;}
  .cat-hero{padding:48px 0 56px;min-height:220px;}
  .cat-hero-inner{padding-left:18px;}
  .timeline{padding-left:40px;}
  .timeline::before{left:8px;}
  .tl-item::before{left:-39px;}
  .split-media img{aspect-ratio:16/10;}
  .cta-points{gap:20px;}
  .nav-cta{padding:0 14px;}
}
@media (max-width:519px){
  .brand-text{font-size:15px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .mini-list li{padding:14px 16px;}
  .cta-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --dark:#0C1613;
  --lime:#C7F04A;
  --orange:#FF5A2B;
  --bg:#F6F5F1;
  --card:#FFFFFF;
  --txt:#12140F;
  --txt-2:#5C635B;
  --txt-3:#8C948B;
  --line:#E3E5DE;
  --line-dark:rgba(255,255,255,.14);
  --ok:#2FA36B;
  --warn:#E9A23B;
  --err:#D94A3D;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,22,19,.04), 0 8px 24px rgba(12,22,19,.05);
  --sh-2:0 18px 40px rgba(12,22,19,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--txt);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
h1,h2,h3,h4{margin:0;font-weight:700;color:inherit;}
ul{margin:0;padding:0;}

.grid-container{
  width:100%;
  max-width:1200px !important;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){ .grid-container{padding-left:32px;padding-right:32px;} }
@media (min-width:1024px){ .grid-container{padding-left:48px;padding-right:48px;} }
@media (min-width:1400px){ .grid-container{max-width:1320px !important;} }

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:68px;
  transition:height .2s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:24px;height:24px;flex:0 0 24px;
  background:var(--lime);
  border-radius:5px;
  transform:skewX(-14deg);
  box-shadow:inset 0 0 0 1px rgba(12,22,19,.14);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:22px;margin-left:8px;}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:4px 0;
  font-size:15px;
  font-weight:500;
  color:var(--txt-2);
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;
  background:var(--lime);transition:width .2s var(--ease);
}
.nav-menu a:hover{color:var(--txt);}
.nav-menu a:hover::after{width:100%;}
.nav-menu a.is-active{color:var(--txt);font-weight:600;}
.nav-menu a.is-active::before{
  content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--lime);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:250px;height:38px;padding:0 12px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:border-color .18s var(--ease), transform .18s var(--ease), box-shadow .18s var(--ease);
}
.command-search i{color:var(--txt-3);font-size:13px;}
.command-search input{
  flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:14px;
}
.command-search input::placeholder{color:var(--txt-3);}
.command-search:focus-within{
  border-color:var(--lime);
  transform:translateY(-1px);
  box-shadow:0 0 0 3px rgba(199,240,74,.28);
}
.kbd{
  font-family:"Inter",system-ui,sans-serif;
  font-size:11px;font-weight:700;line-height:1;
  padding:4px 6px;border-radius:6px;
  background:var(--bg);border:1px solid var(--line);color:var(--txt-3);
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--txt-2);
  transition:.18s var(--ease);
}
.icon-btn:hover{border-color:var(--lime);color:var(--txt);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:10px 22px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:#e94b1d;transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,90,43,.28);}
.btn-ghost{background:transparent;color:var(--dark);border-color:rgba(12,22,19,.22);}
.btn-ghost:hover{border-color:var(--dark);background:rgba(12,22,19,.04);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.34);}
.btn-ghost-light:hover{border-color:var(--lime);color:var(--lime);}
.btn:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--lime);outline-offset:2px;
}
.nav-cta{min-height:36px;padding:7px 18px;font-size:14px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:#fff;
}
@media (max-width:1023px){
  .command-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-menu{
    position:absolute;left:0;right:0;top:100%;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);
    padding:8px 20px 20px;
    opacity:0;transform:translateY(-6px);pointer-events:none;
    transition:opacity .2s var(--ease), transform .2s var(--ease);
  }
  .nav-menu.is-open{opacity:1;transform:none;pointer-events:auto;}
  .nav-menu a{padding:14px 0;border-bottom:1px dashed var(--line);font-size:16px;}
  .nav-menu a.is-active::before{left:0;top:22px;transform:none;}
  .nav-menu a.is-active{padding-left:14px;}
}
@media (max-width:520px){
  .brand-text{font-size:15px;}
  .nav-cta{padding:7px 14px;}
}

/* ---------- category hero ---------- */
.page-hero{
  position:relative;
  background:var(--dark);
  color:#fff;
  padding:52px 0 60px;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.16;
}
.page-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:6px;
  background:var(--lime);opacity:.85;
}
.hero-inner{position:relative;z-index:2;}
.hero-num{
  position:absolute;right:28px;top:-6px;z-index:1;
  font-family:"Inter","Space Grotesk",system-ui,sans-serif;
  font-size:96px;font-weight:800;line-height:1;
  color:rgba(255,255,255,.08);pointer-events:none;user-select:none;
}
.crumbs{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:22px;}
.crumbs a:hover{color:var(--lime);}
.crumbs span{margin:0 6px;color:rgba(255,255,255,.35);}
.hero-copy{
  border-left:1px solid var(--lime);
  padding-left:20px;
  max-width:760px;
}
.page-hero h1{
  font-size:clamp(30px,4.6vw,52px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
  color:#fff;
}
.hero-sub{
  margin:16px 0 0;
  font-size:clamp(15px,1.6vw,17px);
  color:rgba(255,255,255,.72);
  max-width:60ch;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag-pill{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:13px;font-weight:500;
  border:1px solid rgba(255,255,255,.2);
  color:rgba(255,255,255,.82);
}
@media (min-width:1024px){
  .page-hero{padding:64px 0 72px;}
  .hero-copy{padding-left:26px;}
  .hero-num{right:48px;font-size:104px;}
}

/* ---------- sections ---------- */
.section{padding:64px 0;}
@media (min-width:1024px){ .section{padding:96px 0;} }
.section-white{background:var(--card);}
.section-dark{background:var(--dark);color:#fff;}
.section-dark p{color:rgba(255,255,255,.72);}
.section-head{max-width:760px;margin-bottom:48px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--txt-2);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:14px;height:2px;background:var(--lime);}
.eyebrow-dark{color:rgba(255,255,255,.72);}
.section-head h2{
  font-size:clamp(22px,3vw,36px);
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.25;
}
.lead{margin-top:16px;color:var(--txt-2);max-width:68ch;}
.section-dark .lead{color:rgba(255,255,255,.72);}

/* ---------- media rows ---------- */
.media-row{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:center;
  padding-top:32px;
  margin-top:32px;
  border-top:1px dashed var(--line);
}
.media-row:first-of-type{border-top:0;padding-top:0;margin-top:0;}
.media-row__fig{
  border-radius:var(--r-l);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.media-row__fig img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.media-row__fig:hover img{transform:scale(1.03);}
.media-row__body .num{
  display:block;
  font-family:"Inter","Space Grotesk",system-ui,sans-serif;
  font-size:32px;font-weight:800;line-height:1;
  color:var(--lime);
  -webkit-text-stroke:.4px rgba(12,22,19,.25);
  margin-bottom:12px;
}
.media-row__body h3{font-size:clamp(20px,2.2vw,24px);font-weight:700;line-height:1.35;}
.media-row__body p{margin-top:14px;color:var(--txt-2);max-width:64ch;}
.tick-list{margin-top:18px;display:grid;gap:10px;}
.tick-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--txt-2);
  list-style:none;
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:9px;height:2px;background:var(--lime);
}
.tick-list li b{color:var(--txt);font-weight:600;}
@media (min-width:1024px){
  .media-row{grid-template-columns:1.05fr .95fr;gap:56px;padding-top:48px;margin-top:48px;}
  .media-row.is-reverse .media-row__fig{order:2;}
}

/* ---------- stats band ---------- */
.stat-layout{display:grid;grid-template-columns:1fr;gap:36px;align-items:center;}
.stat-intro h2{font-size:clamp(22px,3vw,34px);color:#fff;line-height:1.28;}
.stat-intro p{margin-top:16px;color:rgba(255,255,255,.72);max-width:44ch;}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.stat{
  padding:22px 20px;
  border:1px solid var(--line-dark);
  border-radius:var(--r-m);
  background:rgba(255,255,255,.06);
  transition:.2s var(--ease);
}
.stat:hover{border-color:rgba(199,240,74,.5);transform:translateY(-2px);}
.stat-num{
  display:block;
  font-family:"Inter","Space Grotesk",system-ui,sans-serif;
  font-size:clamp(28px,4vw,42px);
  font-weight:800;line-height:1;color:var(--lime);
}
.stat-label{
  display:block;margin-top:10px;
  font-size:13px;color:rgba(255,255,255,.72);line-height:1.6;
}
@media (min-width:1024px){
  .stat-layout{grid-template-columns:4fr 8fr;gap:56px;}
  .stat-grid{grid-template-columns:repeat(4,1fr);}
}

/* ---------- columns cards ---------- */
.col-layout{display:grid;grid-template-columns:1fr;gap:24px;}
.feature-card{
  display:block;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease);
  height:100%;
}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.feature-card__fig{overflow:hidden;}
.feature-card__fig img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s var(--ease);}
.feature-card:hover .feature-card__fig img{transform:scale(1.03);}
.feature-card__body{padding:26px 26px 30px;}
.feature-card__body h3{font-size:22px;font-weight:700;line-height:1.35;}
.feature-card__body p{margin-top:14px;color:var(--txt-2);font-size:15px;}
.mini-stack{display:grid;gap:24px;height:100%;}
.mini-card{
  display:flex;
  gap:16px;
  align-items:flex-start;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:20px;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease);
}
.mini-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.mini-card__fig{flex:0 0 96px;border-radius:var(--r-s);overflow:hidden;}
.mini-card__fig img{width:96px;height:96px;object-fit:cover;}
.mini-card h3{font-size:17px;font-weight:700;}
.mini-card p{margin-top:8px;font-size:14px;color:var(--txt-2);line-height:1.75;}
@media (min-width:1024px){
  .col-layout{grid-template-columns:7fr 5fr;gap:28px;}
}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;}
.faq-item{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:0 22px;
  margin-bottom:12px;
  transition:box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.faq-item:hover{border-color:#d5d9cf;}
.faq-item[open]{box-shadow:var(--sh-1);border-color:#d5d9cf;}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;
  font-size:17px;font-weight:600;line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  display:grid;place-items:center;
  width:26px;height:26px;flex:0 0 26px;
  border-radius:50%;background:var(--lime);
  color:var(--dark);font-size:16px;font-weight:700;line-height:1;
}
.faq-item[open] summary::after{content:"−";}
.faq-body{
  border-top:1px dashed var(--line);
  padding:16px 0 20px;
  font-size:15px;color:var(--txt-2);line-height:1.9;
}

/* ---------- CTA band ---------- */
.cta-band{padding:64px 0;}
.cta-layout{
  display:grid;grid-template-columns:1fr;gap:28px;align-items:center;
}
.cta-layout h2{font-size:clamp(22px,3vw,34px);color:#fff;line-height:1.28;}
.cta-layout p{margin-top:14px;color:rgba(255,255,255,.72);max-width:52ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-progress{
  margin-top:34px;
  position:relative;
  height:6px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);
  overflow:hidden;
}
.cta-progress span{
  position:absolute;left:0;top:0;bottom:0;width:72%;
  background:var(--lime);border-radius:var(--r-pill);
}
.cta-note{margin-top:14px;font-size:13px;color:rgba(255,255,255,.6);}
@media (min-width:1024px){
  .cta-band{padding:96px 0;}
  .cta-layout{grid-template-columns:8fr 4fr;gap:48px;}
  .cta-actions{justify-content:flex-end;}
}

/* ---------- footer ---------- */
.site-footer{
  background:var(--dark);
  color:rgba(255,255,255,.72);
  border-top:1px solid var(--line-dark);
  padding:68px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;} }
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;}
.footer-col > p{font-size:14px;line-height:1.8;max-width:38ch;}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-links{list-style:none;display:grid;gap:10px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color .18s var(--ease);}
.footer-links a:hover{color:var(--lime);}
.footer-contact{list-style:none;display:grid;gap:12px;font-size:14px;}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;}
.footer-contact i{color:var(--lime);margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:52px;
  border-top:1px solid var(--line-dark);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:14px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.6);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.72);font-size:13px;transition:color .18s var(--ease);}
.to-top:hover{color:var(--lime);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .24s var(--ease), transform .24s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

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

/* roulang page: category3 */
/* ============ 设计变量 ============ */
:root{
  --ink:#0C1613;
  --ink-2:#132019;
  --lime:#C7F04A;
  --lava:#FF5A2B;
  --lava-dark:#E8461B;
  --bg:#F6F5F1;
  --card:#FFFFFF;
  --t1:#12140F;
  --t2:#5C635B;
  --t3:#8C948B;
  --line:#E3E5DE;
  --line-d:rgba(255,255,255,.14);
  --d-text:rgba(255,255,255,.72);
  --ok:#2FA36B;
  --warn:#E9A23B;
  --err:#D94A3D;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,22,19,.04), 0 8px 24px rgba(12,22,19,.05);
  --sh-2:0 18px 40px rgba(12,22,19,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sans:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --num:"Inter","Space Grotesk",ui-monospace,SFMono-Regular,Menlo,monospace;
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--t1);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1{font-size:clamp(30px,4.6vw,56px);font-weight:800;letter-spacing:-.02em;line-height:1.14;}
h2{font-size:clamp(22px,3vw,36px);font-weight:700;letter-spacing:-.015em;line-height:1.25;}
h3{font-size:clamp(19px,2vw,23px);font-weight:700;line-height:1.35;}
h4{font-size:17px;font-weight:600;line-height:1.4;}
p{max-width:72ch;}
p+p{margin-top:1.2em;}
::selection{background:var(--lime);color:var(--ink);}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;}

/* ============ 容器与栅格 ============ */
.grid-container{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
@media screen and (min-width:640px){
  .grid-container{padding-left:32px;padding-right:32px;}
}
@media screen and (min-width:1024px){
  .grid-container{padding-left:48px;padding-right:48px;}
}
@media screen and (min-width:1400px){
  .grid-container{max-width:1320px;}
}
.section{padding:48px 0;}
@media screen and (min-width:640px){.section{padding:64px 0;}}
@media screen and (min-width:1024px){.section{padding:96px 0;}}
.section-tight{padding:40px 0;}
@media screen and (min-width:1024px){.section-tight{padding:56px 0;}}
.section-dark{background:var(--ink);color:#fff;}
.section-dark p{color:var(--d-text);}
.section-head{max-width:760px;margin-bottom:32px;}
.section-head h2{margin-bottom:12px;}
.section-head p{color:var(--t2);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--num);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--t3);margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--lime);border-radius:2px;}

/* ============ 按钮与徽章 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn i{transition:transform .18s var(--ease);}
.btn:hover i{transform:translateX(4px);}
.btn-primary{background:var(--lava);color:#fff;box-shadow:0 6px 18px rgba(255,90,43,.24);}
.btn-primary:hover{background:var(--lava-dark);box-shadow:0 10px 26px rgba(255,90,43,.3);}
.btn-ghost{border:1px solid rgba(255,255,255,.32);color:#fff;}
.btn-ghost:hover{border-color:var(--lime);color:var(--lime);}
.btn-outline{border:1px solid var(--line);background:#fff;color:var(--t1);}
.btn-outline:hover{border-color:var(--ink);}
.btn-sm{min-height:36px;padding:0 16px;font-size:14px;}

.badge{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;line-height:1.6;
}
.badge-lime{background:var(--lime);color:var(--ink);}
.badge-line{border:1px solid var(--line);color:var(--t2);background:#fff;}
.badge-dark{border:1px solid var(--line-d);color:var(--d-text);background:rgba(255,255,255,.06);}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:height .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(12,22,19,.06);}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  height:68px;
  transition:height .2s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:60px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:22px;height:22px;flex:0 0 auto;
  background:var(--lime);
  border-radius:4px;
  transform:skewX(-12deg);
  display:inline-block;
}
.brand-text{
  font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--ink);white-space:nowrap;
}
.nav-menu{display:flex;align-items:center;gap:26px;}
.nav-menu a{
  position:relative;
  font-size:15px;font-weight:500;color:var(--t2);
  padding:6px 0;
  transition:color .18s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-menu a:hover{color:var(--t1);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.is-active{color:var(--t1);font-weight:600;}
.nav-menu a.is-active::before{
  content:"";position:absolute;left:-13px;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--lime);
}
.nav-right{display:flex;align-items:center;gap:12px;}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:250px;height:38px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:#fff;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.command-search i{color:var(--t3);font-size:13px;}
.command-search input{
  flex:1;min-width:0;border:0;outline:none;background:transparent;
  font-size:14px;color:var(--t1);
}
.command-search input::placeholder{color:var(--t3);}
.command-search:focus-within{
  border-color:var(--lime);
  box-shadow:0 0 0 3px rgba(199,240,74,.28);
  transform:translateY(-1px);
}
.command-search .kbd{
  font-family:var(--num);font-size:11px;color:var(--t3);
  border:1px solid var(--line);border-radius:6px;padding:1px 6px;background:var(--bg);
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);color:var(--t2);background:#fff;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px);}
.nav-cta{min-height:36px;padding:0 18px;font-size:14px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--t1);font-size:16px;
}
@media screen and (max-width:1023px){
  .nav-menu{
    position:fixed;left:0;right:0;top:0;bottom:0;
    flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:0;
    padding:96px 28px 40px;
    background:var(--ink);
    transform:translateX(100%);
    transition:transform .24s var(--ease);
    z-index:70;
    overflow-y:auto;
  }
  .nav-menu.is-open{transform:translateX(0);}
  .nav-menu a{
    width:100%;color:#fff;font-size:18px;font-weight:600;
    padding:16px 0;border-bottom:1px solid var(--line-d);
  }
  .nav-menu a::after{display:none;}
  .nav-menu a.is-active{color:var(--lime);}
  .nav-menu a.is-active::before{left:auto;right:4px;width:7px;height:7px;}
  .command-search{display:none;}
  .nav-toggle{display:inline-flex;}
}
@media screen and (max-width:520px){
  .brand-text{font-size:15px;}
  .nav-cta{padding:0 14px;}
  .icon-btn{display:none;}
}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--ink);
  color:#fff;
  padding:56px 0 52px;
}
@media screen and (min-width:1024px){
  .cat-hero{padding:88px 0 76px;min-height:280px;}
}
.cat-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:6px;
  background:linear-gradient(90deg,var(--lime) 0%,var(--lime) 62%,rgba(199,240,74,.18) 62%,rgba(199,240,74,.18) 100%);
}
.cat-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center right;
  opacity:.16;
  pointer-events:none;
}
.cat-index{
  position:absolute;top:24px;right:24px;
  font-family:var(--num);font-weight:700;font-size:96px;line-height:1;
  color:#fff;opacity:.08;
  user-select:none;pointer-events:none;
}
@media screen and (min-width:1024px){
  .cat-index{font-size:150px;top:10px;right:48px;}
}
.cat-hero-inner{
  position:relative;z-index:2;
  padding-left:20px;
  border-left:1px solid var(--lime);
  max-width:760px;
}
@media screen and (min-width:640px){
  .cat-hero-inner{padding-left:28px;}
}
.cat-hero h1{color:#fff;margin:16px 0 14px;}
.cat-sub{font-size:17px;color:var(--d-text);max-width:56ch;}
.cat-hero-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;
  font-size:13px;color:rgba(255,255,255,.6);font-family:var(--num);
}
.cat-hero-meta span{display:inline-flex;align-items:center;gap:7px;}
.cat-hero-meta i{color:var(--lime);font-size:12px;}

/* ============ 指标条 ============ */
.metric-strip{
  background:#fff;
  border-bottom:1px solid var(--line);
}
.metric-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:1px;
  background:var(--line);
  border-left:1px solid var(--line);
  border-right:1px solid var(--line);
}
@media screen and (min-width:768px){
  .metric-grid{grid-template-columns:repeat(4,1fr);}
}
.metric-cell{
  background:#fff;
  padding:26px 20px;
  transition:background-color .2s var(--ease);
}
.metric-cell:hover{background:#FBFBF8;}
.metric-num{
  font-family:var(--num);font-weight:700;
  font-size:clamp(26px,3.4vw,34px);
  letter-spacing:-.02em;color:var(--ink);
  line-height:1.1;
}
.metric-num em{font-style:normal;font-size:.55em;color:var(--t3);margin-left:3px;}
.metric-label{
  margin-top:6px;font-size:13.5px;color:var(--t2);letter-spacing:.01em;
}

/* ============ 活动大卡片 ============ */
.card-grid{margin-top:8px;}
.act-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.act-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D5D9CF;}
.act-card-media{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/9;
  background:#EDEEE8;
}
.act-card-media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .3s var(--ease);
}
.act-card:hover .act-card-media img{transform:scale(1.03);}
.act-card-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,22,19,0) 55%,rgba(12,22,19,.42) 100%);
}
.act-card-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
}
.act-card-body{
  display:flex;flex-direction:column;flex:1;
  padding:24px 24px 22px;
}
.card-top{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-bottom:14px;
}
.card-num{
  font-family:var(--num);font-weight:700;font-size:20px;
  color:var(--lime);letter-spacing:.02em;
  background:var(--ink);border-radius:var(--r-s);
  padding:2px 10px;line-height:1.5;
}
.act-card h3{margin-bottom:10px;}
.act-card-body > p{font-size:14.5px;color:var(--t2);line-height:1.8;}
.mini-list{margin-top:16px;display:flex;flex-direction:column;gap:9px;}
.mini-list li{
  position:relative;padding-left:18px;
  font-size:14px;color:var(--t2);line-height:1.7;
}
.mini-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:7px;height:7px;border-radius:2px;
  background:var(--lime);transform:skewX(-12deg);
}
.card-foot{
  margin-top:auto;padding-top:20px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  border-top:1px dashed var(--line);
}
.card-foot .time{
  font-family:var(--num);font-size:12.5px;color:var(--t3);letter-spacing:.01em;
}
.arrow-link{
  display:inline-flex;align-items:center;gap:7px;
  font-size:14px;font-weight:600;color:var(--ink);
}
.arrow-link i{transition:transform .18s var(--ease);color:var(--lava);}
.arrow-link:hover i{transform:translateX(4px);}

/* ============ 活动节奏（非对称深色区） ============ */
.rhythm{position:relative;overflow:hidden;}
.rhythm::before{
  content:"";position:absolute;right:-120px;top:-120px;
  width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(199,240,74,.14),rgba(199,240,74,0) 68%);
  pointer-events:none;
}
.rhythm-grid{position:relative;z-index:2;}
.rhythm h2{color:#fff;margin-bottom:20px;}
.rhythm-text p{font-size:15.5px;color:var(--d-text);}
.rhythm-list{margin-top:26px;display:flex;flex-direction:column;}
.rhythm-list li{
  display:flex;gap:16px;align-items:flex-start;
  padding:18px 0;
  border-top:1px dashed var(--line-d);
}
.rhythm-list li:last-child{border-bottom:1px dashed var(--line-d);}
.rhythm-idx{
  font-family:var(--num);font-size:13px;font-weight:700;color:var(--lime);
  min-width:34px;padding-top:3px;letter-spacing:.04em;
}
.rhythm-list strong{display:block;font-size:15.5px;color:#fff;font-weight:600;margin-bottom:4px;}
.rhythm-list span{font-size:14px;color:var(--d-text);}
.rhythm-media{
  position:relative;border-radius:var(--r-l);overflow:hidden;
  border:1px solid var(--line-d);
}
.rhythm-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.rhythm-plate{
  position:absolute;left:20px;bottom:20px;right:20px;
  padding:16px 18px;
  background:rgba(12,22,19,.72);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--line-d);
  border-radius:var(--r-m);
}
.rhythm-plate .plate-num{
  font-family:var(--num);font-weight:700;font-size:26px;color:var(--lime);line-height:1.2;
}
.rhythm-plate .plate-label{font-size:13px;color:var(--d-text);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);
  overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:#D5D9CF;box-shadow:var(--sh-1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;
  font-size:17px;font-weight:600;color:var(--t1);line-height:1.5;
}
.faq-sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--lime);color:var(--ink);
  font-size:14px;font-weight:700;
  transition:transform .2s var(--ease);
}
.faq-item.is-open .faq-sign{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .2s var(--ease);
}
.faq-a-inner{
  padding:0 22px 22px;
  font-size:15px;color:var(--t2);line-height:1.9;
}

/* ============ CTA 通栏 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink);color:#fff;
}
.cta-band::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:6px;
  background:linear-gradient(90deg,rgba(199,240,74,.18) 0%,rgba(199,240,74,.18) 38%,var(--lime) 38%,var(--lime) 100%);
}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:32px;
}
.cta-copy{max-width:620px;}
.cta-copy h2{color:#fff;margin-bottom:14px;}
.cta-copy p{color:var(--d-text);font-size:15.5px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-note{
  margin-top:22px;display:flex;flex-wrap:wrap;gap:10px 26px;
  font-size:13px;color:rgba(255,255,255,.58);font-family:var(--num);
}
.cta-note span{display:inline-flex;align-items:center;gap:7px;}
.cta-note i{color:var(--lime);font-size:12px;}

/* ============ 页脚 ============ */
.site-footer{
  background:#080F0C;color:#fff;
  border-top:1px solid var(--line-d);
  padding-top:64px;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:36px;
}
@media screen and (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,1fr);}
}
@media screen and (min-width:1024px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;}
}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;font-size:17px;}
.footer-col p{font-size:14px;color:rgba(255,255,255,.6);line-height:1.8;max-width:34ch;}
.footer-col h4{
  font-size:14px;font-weight:600;letter-spacing:.06em;
  color:#fff;margin-bottom:16px;text-transform:uppercase;
}
.footer-links li{margin-bottom:10px;}
.footer-links a,.footer-contact span{
  font-size:14px;color:rgba(255,255,255,.62);
  transition:color .18s var(--ease);
}
.footer-links a:hover{color:var(--lime);}
.footer-contact li{
  display:flex;align-items:center;gap:10px;margin-bottom:12px;
}
.footer-contact i{color:var(--lime);font-size:13px;width:16px;flex:0 0 auto;}
.footer-bottom{
  margin-top:52px;padding:22px 0;
  border-top:1px solid var(--line-d);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.48);}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.7);
  border:1px solid var(--line-d);border-radius:var(--r-pill);
  padding:8px 16px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.to-top:hover{color:var(--lime);border-color:var(--lime);}

/* ============ 入场动画 ============ */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}

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

/* roulang page: category4 */
:root{
  --dark:#0C1613;
  --lime:#C7F04A;
  --orange:#FF5A2B;
  --orange-deep:#E8461A;
  --bg:#F6F5F1;
  --sand:#EFEDE6;
  --card:#FFFFFF;
  --ink:#12140F;
  --ink-2:#5C635B;
  --ink-3:#8C948B;
  --line:#E3E5DE;
  --line-dark:rgba(255,255,255,.14);
  --on-dark:#FFFFFF;
  --on-dark-2:rgba(255,255,255,.72);
  --ok:#2FA36B;
  --warn:#E9A23B;
  --err:#D94A3D;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --r-pill:999px;
  --sh:0 1px 2px rgba(12,22,19,.04), 0 8px 24px rgba(12,22,19,.05);
  --sh-h:0 18px 40px rgba(12,22,19,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --s-1:8px; --s-2:12px; --s-3:16px; --s-4:24px; --s-5:32px; --s-6:48px; --s-7:72px; --s-8:104px;
  --font-cn: system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Inter","Space Grotesk",system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
h1,h2,h3,h4{letter-spacing:-.02em;line-height:1.2;}
p{max-width:72ch;}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:4px;}

/* ---------- 容器 ---------- */
.grid-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media screen and (min-width:640px){
  .grid-container{padding-left:32px;padding-right:32px;}
}
@media screen and (min-width:1024px){
  .grid-container{padding-left:48px;padding-right:48px;}
}
@media screen and (min-width:1400px){
  .grid-container{max-width:1320px;}
}

/* ---------- 通用 ---------- */
.section{padding:48px 0;}
@media screen and (min-width:640px){.section{padding:64px 0;}}
@media screen and (min-width:1024px){.section{padding:96px 0;}}
.section--dark{background:var(--dark);color:var(--on-dark);}
.section--sand{background:var(--sand);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-3);font-family:var(--font-num);font-weight:700;
}
.section--dark .eyebrow{color:var(--on-dark-2);}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--lime);display:block;}

.section-head{max-width:760px;margin-bottom:var(--s-5);}
.section-head h2{font-size:clamp(22px,3vw,36px);font-weight:700;margin:14px 0 14px;}
.section-head p{color:var(--ink-2);font-size:16px;}
.section--dark .section-head p{color:var(--on-dark-2);}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  border:1px solid var(--lime);color:#5B7111;
  background:rgba(199,240,74,.16);
  font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap;
}
.section--dark .badge{color:var(--lime);background:rgba(199,240,74,.08);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;border-radius:var(--r-pill);
  border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;line-height:1;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn i{transition:transform .18s var(--ease);}
.btn:hover i.fa-arrow-right{transform:translateX(4px);}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 8px 18px rgba(255,90,43,.22);}
.btn-primary:hover{background:var(--orange-deep);color:#fff;box-shadow:0 12px 26px rgba(255,90,43,.3);}
.btn-ghost{background:transparent;border-color:var(--lime);color:var(--ink);}
.btn-ghost:hover{background:var(--lime);border-color:var(--lime);color:var(--dark);}
.section--dark .btn-ghost{color:#fff;border-color:rgba(255,255,255,.34);}
.section--dark .btn-ghost:hover{background:var(--lime);border-color:var(--lime);color:var(--dark);}
.btn-line{background:transparent;border-color:var(--line);color:var(--ink);}
.btn-line:hover{border-color:var(--ink);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:height .2s var(--ease);
}
.nav-inner{
  display:flex;align-items:center;gap:24px;
  height:68px;
}
.site-header.is-scrolled .nav-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:22px;height:22px;display:block;flex:0 0 auto;
  background:var(--lime);
  clip-path:polygon(0 0,100% 0,100% 62%,62% 100%,0 100%);
  border:1px solid rgba(12,22,19,.9);
}
.brand-text{
  font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;
  font-family:var(--font-cn);
}
.nav-menu{
  display:none;align-items:center;gap:26px;flex:1 1 auto;
}
.nav-menu a{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;white-space:nowrap;transition:color .18s var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-menu a:hover{color:var(--ink);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.is-active{color:var(--ink);font-weight:700;}
.nav-menu a.is-active::after{transform:scaleX(1);}
.nav-menu a.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--lime);
}
.nav-right{display:flex;align-items:center;gap:10px;margin-left:auto;}
.command-search{
  display:none;align-items:center;gap:8px;
  height:38px;width:240px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:#fff;color:var(--ink-3);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.command-search input{
  border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink);
}
.command-search input::placeholder{color:var(--ink-3);}
.command-search:focus-within{
  border-color:var(--lime);
  box-shadow:0 8px 20px rgba(12,22,19,.07);
  transform:translateY(-1px);
}
.kbd{
  font-family:var(--font-num);font-size:11px;font-weight:700;color:var(--ink-2);
  border:1px solid var(--line);border-radius:6px;padding:2px 6px;background:var(--bg);
}
.icon-btn{
  display:none;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);color:var(--ink-2);background:#fff;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{border-color:var(--lime);color:var(--ink);transform:translateY(-1px);}
.nav-cta{height:36px;min-height:36px;padding:0 20px;font-size:14px;}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:var(--r-s);
  border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;
}
.nav-drawer{
  position:fixed;inset:0;z-index:80;display:none;
  background:rgba(12,22,19,.55);
}
.nav-drawer.is-open{display:block;}
.nav-drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:min(88vw,340px);
  background:var(--dark);color:#fff;padding:24px 22px 40px;
  display:flex;flex-direction:column;gap:6px;
  overflow-y:auto;
}
.nav-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.nav-drawer-head .brand-text{color:#fff;}
.nav-drawer-close{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--line-dark);
  background:transparent;color:#fff;cursor:pointer;
}
.nav-drawer a{
  padding:14px 4px;font-size:16px;font-weight:500;color:var(--on-dark-2);
  border-bottom:1px dashed var(--line-dark);
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.nav-drawer a:hover,.nav-drawer a.is-active{color:var(--lime);padding-left:8px;}
.nav-drawer .btn{margin-top:22px;width:100%;}
@media screen and (min-width:1024px){
  .nav-menu{display:flex;}
  .command-search{display:flex;}
  .icon-btn{display:inline-flex;}
  .nav-toggle{display:none;}
  .nav-inner{gap:34px;}
}

/* ---------- 分类 Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:var(--dark);color:var(--on-dark);
  padding:56px 0 60px;
  min-height:240px;
  display:flex;align-items:center;
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.16;filter:grayscale(.35);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(12,22,19,.96) 0%,rgba(12,22,19,.78) 58%,rgba(12,22,19,.6) 100%);
}
.page-hero .grid-container{position:relative;z-index:2;}
.page-hero-inner{display:flex;align-items:flex-start;gap:22px;}
.hero-rail{border-left:1px solid var(--lime);padding-left:20px;max-width:720px;}
.page-hero h1{
  font-size:clamp(30px,4.6vw,52px);
  font-weight:800;line-height:1.14;margin:14px 0 14px;
  color:#fff;word-break:break-word;
}
.page-hero p{color:var(--on-dark-2);font-size:16px;max-width:56ch;}
.hero-index{
  position:absolute;top:8px;right:24px;
  font-family:var(--font-num);font-weight:800;
  font-size:96px;line-height:1;color:rgba(255,255,255,.08);
  pointer-events:none;user-select:none;
}
.hero-rule{
  position:absolute;left:0;bottom:0;height:6px;width:100%;
  background:linear-gradient(90deg,var(--lime) 0%,var(--lime) 38%,rgba(199,240,74,.16) 38%,rgba(199,240,74,.16) 100%);
  z-index:3;
}
@media screen and (min-width:640px){
  .page-hero{padding:68px 0 72px;}
  .hero-index{font-size:120px;right:40px;}
}

/* ---------- 面包屑 ---------- */
.crumb{padding:18px 0;}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--ink-3);}
.crumb a{color:var(--ink-2);transition:color .18s var(--ease);}
.crumb a:hover{color:var(--ink);}
.crumb li::after{content:"›";margin-left:8px;color:var(--ink-3);}
.crumb li:last-child::after{content:"";}

/* ---------- 步骤清单 ---------- */
.steps-wrap{display:grid;gap:var(--s-6);}
@media screen and (min-width:1024px){
  .steps-wrap{grid-template-columns:minmax(0,1fr) 380px;gap:72px;align-items:start;}
}
.step-list{counter-reset:step;border-top:1px dashed var(--line);}
.step-item{
  display:flex;gap:20px;
  padding:26px 0;
  border-bottom:1px dashed var(--line);
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
.step-item:hover{background:rgba(199,240,74,.07);padding-left:10px;}
.step-num{
  font-family:var(--font-num);font-weight:800;
  font-size:clamp(34px,5vw,52px);line-height:1;color:var(--lime);
  min-width:64px;text-shadow:0 1px 0 rgba(12,22,19,.12);
}
.step-body h3{font-size:19px;font-weight:700;margin-bottom:8px;}
.step-body p{color:var(--ink-2);font-size:15px;line-height:1.8;}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.step-tags span{
  font-size:12px;color:var(--ink-2);
  border:1px dashed var(--line);border-radius:var(--r-pill);
  padding:3px 10px;background:#fff;
}
.steps-aside{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--sh);overflow:hidden;
}
.steps-aside img{aspect-ratio:16/10;object-fit:cover;width:100%;}
.steps-aside-body{padding:24px;}
.steps-aside-body h3{font-size:18px;font-weight:700;margin-bottom:10px;}
.steps-aside-body p{font-size:14px;color:var(--ink-2);}
.aside-list{margin-top:18px;display:grid;gap:12px;}
.aside-list li{display:flex;gap:10px;font-size:14px;color:var(--ink-2);}
.aside-list i{color:var(--orange);margin-top:5px;font-size:12px;}
.sticky-aside{position:sticky;top:96px;}

/* ---------- 卡点提示（深底） ---------- */
.tips-grid{display:grid;gap:32px;}
@media screen and (min-width:1024px){
  .tips-grid{grid-template-columns:minmax(0,0.85fr) minmax(0,1.15fr);gap:72px;}
}
.tips-left h2{font-size:clamp(22px,3vw,34px);font-weight:700;margin:14px 0 16px;color:#fff;}
.tips-left p{color:var(--on-dark-2);font-size:15px;}
.tips-list{display:grid;gap:14px;}
.tip-card{
  border:1px solid var(--line-dark);border-radius:var(--r-m);
  background:rgba(255,255,255,.06);
  padding:20px 22px;
  transition:border-color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease);
}
.tip-card:hover{border-color:var(--lime);background:rgba(255,255,255,.09);transform:translateY(-2px);}
.tip-card h3{font-size:17px;font-weight:700;color:#fff;margin-bottom:8px;}
.tip-card p{font-size:14px;color:var(--on-dark-2);line-height:1.8;}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;gap:32px;}
@media screen and (min-width:1024px){
  .faq-layout{grid-template-columns:minmax(0,0.72fr) minmax(0,1.28fr);gap:64px;align-items:start;}
}
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-m);box-shadow:var(--sh);
  overflow:hidden;
  transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.faq-item:hover{box-shadow:var(--sh-h);transform:translateY(-2px);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
}
.faq-mark{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;
  background:var(--lime);color:var(--dark);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;line-height:1;
}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .2s var(--ease);
}
.faq-a-inner{padding:0 20px 20px;font-size:15px;color:var(--ink-2);line-height:1.9;}
.faq-item.is-open .faq-a{max-height:320px;}

/* ---------- 表单块 ---------- */
.join-grid{display:grid;gap:36px;}
@media screen and (min-width:1024px){
  .join-grid{grid-template-columns:minmax(0,0.9fr) minmax(0,1.1fr);gap:72px;align-items:start;}
}
.join-copy h2{font-size:clamp(22px,3vw,34px);font-weight:700;margin:14px 0 16px;}
.join-copy p{color:var(--ink-2);font-size:15px;}
.join-points{margin-top:24px;display:grid;gap:14px;}
.join-points li{display:flex;gap:12px;font-size:15px;color:var(--ink-2);}
.join-points i{color:var(--orange);margin-top:6px;font-size:12px;}
.join-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--sh);padding:28px;
}
@media screen and (min-width:640px){.join-card{padding:34px;}}
.join-card h3{font-size:20px;font-weight:700;margin-bottom:6px;}
.join-card .hint{font-size:14px;color:var(--ink-3);margin-bottom:22px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;}
.field input{
  width:100%;height:44px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-s);
  background:#fff;font-size:15px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field input::placeholder{color:var(--ink-3);}
.field input:focus{
  outline:0;border-color:var(--lime);
  box-shadow:0 0 0 3px rgba(199,240,74,.28);
}
.form-note{font-size:13px;color:var(--ink-3);margin-top:14px;}
.form-alert{
  display:none;margin-top:16px;padding:12px 14px;border-radius:var(--r-s);
  background:rgba(47,163,107,.1);border:1px solid rgba(47,163,107,.35);
  color:#1E6F49;font-size:14px;
}
.form-alert.is-visible{display:block;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--on-dark-2);border-top:1px solid var(--line-dark);}
.footer-main{padding:56px 0 40px;}
.footer-grid{display:grid;gap:34px;}
@media screen and (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media screen and (min-width:1024px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:48px;}
  .footer-main{padding:72px 0 48px;}
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-text{color:#fff;}
.footer-col p{font-size:14px;line-height:1.8;color:var(--on-dark-2);}
.footer-col h4{
  font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:0;
}
.footer-links,.footer-contact{display:grid;gap:10px;}
.footer-links a{font-size:14px;color:var(--on-dark-2);transition:color .18s var(--ease),padding-left .18s var(--ease);}
.footer-links a:hover{color:var(--lime);padding-left:4px;}
.footer-contact li{display:flex;gap:10px;font-size:14px;line-height:1.7;}
.footer-contact i{color:var(--lime);margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:18px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
}
.footer-bottom p{font-size:13px;color:var(--on-dark-2);margin:0;}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--on-dark-2);
  border:1px solid var(--line-dark);border-radius:var(--r-pill);
  padding:8px 16px;transition:color .18s var(--ease),border-color .18s var(--ease);
}
.to-top:hover{color:var(--lime);border-color:var(--lime);}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-in{opacity:1;transform:none;transition:opacity .24s var(--ease),transform .24s var(--ease);}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}