/* roulang page: index */
:root{
  --ink:#0E1211;
  --panel:#171B1A;
  --paper:#F6F5F1;
  --card:#FFFFFF;
  --line:#E6E3DC;
  --lime:#C6F24E;
  --clay:#FF6A3D;
  --deep:#1F6F5C;
  --t1:#121514;
  --t2:#5C6360;
  --t3:#8B918E;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --sh:0 1px 2px rgba(14,18,17,.05);
  --sh-hover:0 6px 18px rgba(14,18,17,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:70px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--t1);
  background:var(--paper);
  padding-bottom:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media(min-width:640px){.container{padding:0 24px;}}
@media(min-width:1024px){.container{padding:0 32px;max-width:1264px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  height:var(--nav-h);
  background:rgba(246,245,241,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:var(--nav-h);}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap;}
.logo-mark{
  width:30px;height:30px;border-radius:9px;flex:none;
  background:var(--ink);color:var(--lime);
  display:grid;place-items:center;font-size:14px;font-weight:800;
}
.logo-text{color:var(--t1);}
.nav-links{display:none;align-items:center;gap:4px;margin-left:8px;flex:1;}
@media(min-width:1024px){.nav-links{display:flex;}}
.nav-links a{
  position:relative;display:inline-block;padding:8px 12px;border-radius:8px;
  font-size:14.5px;color:var(--t2);font-weight:500;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.nav-links a:hover{color:var(--t1);background:rgba(14,18,17,.04);}
.nav-links a.active{color:var(--t1);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--lime);border-radius:2px;
}
.nav-cta{margin-left:auto;display:none;}
@media(min-width:1024px){.nav-cta{display:inline-flex;}}
.mobile-toggle{
  margin-left:auto;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:var(--card);display:grid;place-items:center;cursor:pointer;font-size:16px;color:var(--t1);
}
@media(min-width:1024px){.mobile-toggle{display:none;}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .18s var(--ease),box-shadow .25s var(--ease);
}
.btn i{font-size:13px;transition:transform .25s var(--ease);}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:#d2f96a;box-shadow:0 8px 20px rgba(198,242,78,.32);}
.btn-primary:hover i{transform:translateX(4px);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t1);}
.btn-ghost:hover{border-color:var(--t1);}
.btn-dark-ghost{background:transparent;border-color:rgba(255,255,255,.24);color:#F2F3EE;}
.btn-dark-ghost:hover{border-color:var(--lime);color:var(--lime);}
.btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px;}
.btn-dark-ghost:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
.btn-block{width:100%;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;background:var(--ink);
  min-height:clamp(540px,78vh,700px);
  display:flex;align-items:center;
}
.hero-bg{position:absolute;inset:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.72;}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,18,17,.68) 0%,rgba(14,18,17,.62) 55%,rgba(14,18,17,.94) 100%);
}
.hero .container{position:relative;z-index:2;padding-top:72px;padding-bottom:64px;}
.hero-inner{max-width:760px;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;
  color:var(--lime);background:rgba(198,242,78,.12);border:1px solid rgba(198,242,78,.32);
  margin-bottom:22px;
}
.hero h1{
  font-size:clamp(34px,6vw,68px);line-height:1.1;letter-spacing:-.02em;font-weight:800;
  color:#F2F3EE;margin-bottom:20px;
}
.hero h1 em{color:var(--lime);font-style:normal;}
.hero-sub{
  font-size:clamp(15px,1.6vw,18px);line-height:1.85;color:rgba(255,255,255,.72);
  max-width:640px;margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  margin-top:56px;background:rgba(255,255,255,.1);border-radius:16px;overflow:hidden;
}
@media(min-width:768px){.hero-stats{grid-template-columns:repeat(4,1fr);max-width:820px;}}
.hero-stat{background:rgba(14,18,17,.62);padding:20px 18px;}
.hero-stat strong{display:block;font-size:26px;font-weight:800;color:#F2F3EE;letter-spacing:-.01em;}
.hero-stat span{display:block;font-size:13px;color:rgba(255,255,255,.6);margin-top:4px;}

/* ---------- section base ---------- */
.section{padding:76px 0;}
@media(min-width:1024px){.section{padding:96px 0;}}
.section-dark{background:var(--ink);color:#F2F3EE;}
.section-dark h2,.section-dark h3{color:#F2F3EE;}
.section-head{margin-bottom:44px;max-width:760px;}
.section-num{
  display:block;font-size:13px;font-weight:700;letter-spacing:.16em;
  color:var(--deep);margin-bottom:12px;
}
.section-dark .section-num{color:var(--lime);}
.section h2{
  font-size:clamp(24px,3.4vw,40px);line-height:1.18;letter-spacing:-.02em;font-weight:800;
}
.section-desc{margin-top:14px;color:var(--t2);font-size:16px;line-height:1.85;}
.section-dark .section-desc{color:rgba(255,255,255,.68);}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.more-link{
  font-size:14px;font-weight:600;color:var(--deep);display:inline-flex;align-items:center;gap:6px;
  transition:gap .25s var(--ease),color .25s var(--ease);
}
.more-link:hover{gap:10px;color:var(--t1);}

/* ---------- steps ---------- */
.steps-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media(min-width:768px){
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .steps-grid .step:nth-child(2){margin-top:34px;}
  .steps-grid .step:nth-child(3){margin-top:-10px;}
  .steps-grid .step:nth-child(4){margin-top:24px;}
}
@media(min-width:1100px){.steps-grid{grid-template-columns:1.15fr .9fr .95fr 1.05fr;gap:22px;}}
.step{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.step:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.55);box-shadow:var(--sh-hover);}
.step-num{
  font-size:13px;font-weight:800;letter-spacing:.1em;color:var(--ink);
  background:var(--lime);display:inline-block;padding:3px 9px;border-radius:6px;margin-bottom:16px;
}
.step h3{font-size:18px;font-weight:700;margin-bottom:10px;letter-spacing:-.01em;}
.step p{color:var(--t2);font-size:14.5px;line-height:1.8;}
.step-line{height:1px;background:var(--line);margin:16px 0 14px;}

/* ---------- cards ---------- */
.card-grid{display:grid;gap:22px;grid-template-columns:1fr;}
@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;overflow:hidden;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.55);box-shadow:var(--sh-hover);}
.card-media{position:relative;aspect-ratio:16/10;background:var(--line);overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.badge{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  font-size:12.5px;font-weight:600;padding:4px 10px;border-radius:6px;
}
.badge-deep{background:rgba(31,111,92,.1);color:var(--deep);}
.badge-clay{background:rgba(255,106,61,.12);color:#D9481C;}
.card h3{
  font-size:17.5px;font-weight:700;line-height:1.45;letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card p{
  color:var(--t2);font-size:14.5px;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px;}
.card-meta{font-size:13px;color:var(--t3);}
.card-arrow{color:var(--deep);font-size:14px;transition:transform .25s var(--ease);}
.card:hover .card-arrow{transform:translateX(4px);}

/* ---------- progress ---------- */
.progress-panel{
  background:var(--panel);border:1px solid rgba(255,255,255,.08);border-radius:var(--r-card);
  padding:30px 26px;
}
@media(min-width:768px){.progress-panel{padding:40px 38px;}}
.progress-bar{height:10px;border-radius:999px;background:rgba(255,255,255,.1);overflow:hidden;}
.progress-fill{
  height:100%;width:62%;border-radius:999px;background:var(--lime);
  transition:width .7s var(--ease);
}
.milestones{display:grid;grid-template-columns:1fr;gap:18px;margin-top:28px;}
@media(min-width:768px){.milestones{grid-template-columns:repeat(3,1fr);gap:22px;}}
.milestone{border-top:1px solid rgba(255,255,255,.12);padding-top:16px;}
.milestone strong{display:block;font-size:15.5px;font-weight:700;color:#F2F3EE;margin-bottom:6px;}
.milestone span{font-size:13.5px;color:rgba(255,255,255,.6);}
.state{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;margin-bottom:10px;}
.state::before{content:"";width:7px;height:7px;border-radius:50%;}
.state-done{color:var(--lime);}
.state-done::before{background:var(--lime);}
.state-doing{color:var(--clay);}
.state-doing::before{background:var(--clay);}
.state-todo{color:rgba(255,255,255,.44);}
.state-todo::before{background:rgba(255,255,255,.32);}

/* ---------- form / cta band ---------- */
.cta-band{background:var(--ink);color:#F2F3EE;}
.cta-grid{display:grid;gap:40px;grid-template-columns:1fr;}
@media(min-width:1024px){.cta-grid{grid-template-columns:1.05fr .95fr;gap:56px;align-items:start;}}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;color:rgba(255,255,255,.82);margin-bottom:8px;}
.field input{
  width:100%;height:48px;padding:0 16px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  color:#F2F3EE;transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.field input::placeholder{color:rgba(255,255,255,.38);}
.field input:focus{outline:none;border-color:var(--lime);box-shadow:0 0 0 2px rgba(198,242,78,.35);}
.form-hint{font-size:13px;color:rgba(255,255,255,.5);margin-top:10px;}
.notice-list{border-top:1px solid rgba(255,255,255,.12);}
.notice-list li{
  display:flex;gap:14px;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.12);
}
.notice-list i{color:var(--lime);font-size:15px;margin-top:5px;}
.notice-list strong{display:block;font-size:15.5px;font-weight:700;margin-bottom:5px;color:#F2F3EE;}
.notice-list span{font-size:14px;color:rgba(255,255,255,.62);line-height:1.78;}

/* ---------- news ---------- */
.news-grid{display:grid;gap:22px;grid-template-columns:1fr;}
@media(min-width:640px){.news-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);}}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.55);box-shadow:var(--sh-hover);}
.news-media{aspect-ratio:16/10;background:var(--line);overflow:hidden;}
.news-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.news-card:hover .news-media img{transform:scale(1.04);}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-body h3{
  font-size:17px;font-weight:700;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body h3 a{transition:color .25s var(--ease);}
.news-body h3 a:hover{color:var(--deep);}
.news-body p{
  color:var(--t2);font-size:14.5px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.empty-state{
  min-height:220px;border:1px dashed var(--line);border-radius:var(--r-card);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  background:var(--card);text-align:center;padding:32px;
}
.empty-state i{font-size:30px;color:var(--t3);}
.empty-state p{color:var(--t2);font-size:15px;}

/* ---------- faq ---------- */
.faq{max-width:820px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:62px;padding:16px 0;font-size:16.5px;font-weight:600;color:var(--t1);
  transition:color .25s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--deep);}
.faq-item summary:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:6px;}
.faq-icon{
  flex:none;width:24px;height:24px;position:relative;
  transition:transform .3s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--t2);border-radius:2px;
}
.faq-icon::before{left:50%;top:5px;width:2px;height:14px;transform:translateX(-50%);}
.faq-icon::after{top:50%;left:5px;height:2px;width:14px;transform:translateY(-50%);}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-body{padding:0 0 24px;color:var(--t2);font-size:15px;line-height:1.9;max-width:700px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;gap:34px;grid-template-columns:1fr;}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-brand .logo-text{color:#F2F3EE;}
.footer-brand .logo-mark{background:var(--lime);color:var(--ink);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:700;color:#F2F3EE;margin-bottom:16px;letter-spacing:.02em;}
.footer-col li{margin-bottom:11px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .25s var(--ease);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  margin-top:52px;border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 96px;display:flex;flex-wrap:wrap;gap:10px 22px;
  align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.44);
}
@media(min-width:768px){.footer-bottom{padding-bottom:24px;}}

/* ---------- mobile tab bar ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:140;
  display:grid;grid-template-columns:repeat(5,1fr);
  background:rgba(14,18,17,.96);backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-top:1px solid rgba(255,255,255,.1);
  padding-bottom:env(safe-area-inset-bottom);
  height:calc(58px + env(safe-area-inset-bottom));
}
@media(min-width:768px){.tabbar{display:none;}}
.tab-item{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  font-size:11px;color:rgba(255,255,255,.55);transition:color .25s var(--ease);
}
.tab-item i{font-size:18px;}
.tab-item.active{color:var(--lime);}
.tab-item.active::before{
  content:"";position:absolute;top:0;left:22%;right:22%;height:2px;background:var(--lime);border-radius:2px;
}
@media(max-width:767px){
  body{padding-bottom:calc(58px + env(safe-area-inset-bottom));}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}
.reveal:nth-child(2){transition-delay:.06s;}
.reveal:nth-child(3){transition-delay:.12s;}
.reveal:nth-child(4){transition-delay:.18s;}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink:#0E1211;
  --panel:#171B1A;
  --paper:#F6F5F1;
  --card:#FFFFFF;
  --line:#E6E3DC;
  --lime:#C6F24E;
  --clay:#FF6A3D;
  --deep:#1F6F5C;
  --t1:#121514;
  --t2:#5C6360;
  --t3:#8B918E;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shadow:0 1px 2px rgba(14,18,17,.05);
  --shadow-hover:0 6px 18px rgba(14,18,17,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--t1);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.18;font-weight:800;}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media(min-width:640px){.container{padding:0 24px;}}
@media(min-width:1024px){.container{padding:0 32px;max-width:1280px;}}
@media(max-width:1023px){body{padding-bottom:calc(58px + env(safe-area-inset-bottom));}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,245,241,.88);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;height:70px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:30px;height:30px;flex:0 0 auto;display:grid;place-items:center;
  background:var(--ink);color:var(--lime);border-radius:9px;
  font-size:15px;font-weight:800;letter-spacing:0;
}
.logo-text{font-size:16px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
@media(max-width:420px){.logo-text{font-size:14px;}}
.nav-links{display:none;align-items:center;gap:14px;margin-left:auto;}
@media(min-width:1024px){.nav-links{display:flex;}}
.nav-links a{
  position:relative;font-size:14px;color:var(--t2);padding:8px 0;
  transition:color .22s var(--ease);white-space:nowrap;
}
.nav-links a:hover{color:var(--t1);}
.nav-links a.active{color:var(--t1);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--lime);border-radius:2px;
}
.header-cta{display:none;}
@media(min-width:1024px){.header-cta{display:inline-flex;margin-left:6px;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),transform .18s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.btn i{transition:transform .22s var(--ease);font-size:14px;}
.btn:hover i{transform:translateX(4px);}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:#D2F86B;box-shadow:0 8px 20px rgba(198,242,78,.32);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t1);}
.btn-ghost:hover{border-color:#CFCBC1;background:#FFFFFF;}
.btn-dark{background:var(--ink);color:#F2F3EE;}
.btn-dark:hover{background:#1B211F;}
.btn-on-dark{background:transparent;border-color:rgba(255,255,255,.24);color:#F2F3EE;}
.btn-on-dark:hover{border-color:rgba(255,255,255,.5);background:rgba(255,255,255,.06);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
@media(min-width:640px){.btn-block{width:auto;}}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:6px;font-size:13px;line-height:1.5;
  background:rgba(31,111,92,.10);color:var(--deep);
}
.tag-clay{background:rgba(255,106,61,.12);color:#C6451C;}
.tag-lime{background:rgba(198,242,78,.28);color:#4C6316;}

/* ---------- 文章头部 ---------- */
.page-head{
  background:linear-gradient(180deg,#FFFFFF 0%,var(--paper) 100%);
  border-bottom:1px solid var(--line);
  padding:34px 0 32px;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);margin-bottom:18px;
}
.breadcrumb a{color:var(--t2);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--deep);}
.breadcrumb .sep{color:#C9C6BF;}
.breadcrumb .current{
  color:var(--t2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--t3);margin-bottom:16px;}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:#C9C6BF;}
.page-head h1{
  font-size:clamp(28px,4.4vw,44px);
  line-height:1.18;letter-spacing:-.02em;max-width:900px;
}
.page-head .lede{margin-top:18px;max-width:760px;color:var(--t2);font-size:16px;line-height:1.85;}

/* ---------- 正文布局 ---------- */
.article-layout{display:grid;gap:44px;padding:48px 0 68px;}
@media(min-width:1280px){.article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:56px;}}
.article-main{width:100%;max-width:760px;}
@media(min-width:1280px){.article-main{max-width:760px;}}

.article-content{font-size:17px;line-height:1.9;color:#1C201E;}
.article-content p{margin:0 0 18px;}
.article-content h2{font-size:clamp(22px,2.5vw,27px);margin:40px 0 16px;line-height:1.3;}
.article-content h3{font-size:20px;margin:28px 0 12px;font-weight:700;}
.article-content h4{font-size:17px;margin:22px 0 10px;font-weight:700;}
.article-content ul,.article-content ol{margin:0 0 20px;padding-left:22px;}
.article-content ul li{list-style:disc;margin-bottom:8px;}
.article-content ol li{list-style:decimal;margin-bottom:8px;}
.article-content a{color:var(--deep);text-decoration:underline;text-underline-offset:4px;}
.article-content a:hover{color:#175546;}
.article-content blockquote{
  margin:26px 0;padding:16px 22px;border-left:3px solid var(--lime);
  background:#FFFFFF;border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--t2);
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content img{border-radius:14px;margin:26px auto;}
.article-content figure{margin:26px 0;}
.article-content figcaption{font-size:13px;color:var(--t3);text-align:center;margin-top:10px;}
.article-content hr{border:0;border-top:1px solid var(--line);margin:36px 0;}
.article-content table{width:100%;border-collapse:collapse;font-size:15px;margin:24px 0;}
.article-content th,.article-content td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);}
.article-content th{background:#F1EFE9;font-weight:600;}
.article-content tbody tr:nth-child(even){background:#FBFAF7;}
.article-content pre{
  overflow-x:auto;background:var(--ink);color:#E8EAE4;
  padding:16px 18px;border-radius:var(--r-sm);font-size:14px;line-height:1.7;margin:24px 0;
}
.article-content code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}
.article-content :not(pre) > code{background:#EEECE5;padding:2px 6px;border-radius:6px;font-size:.9em;}
@media(max-width:640px){
  .article-content{font-size:16.5px;}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap;}
}

.article-footline{
  margin-top:44px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;
}
.article-footline .note{font-size:13px;color:var(--t3);flex:1 1 220px;}

/* 空态 */
.empty-state{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:56px 28px;text-align:center;box-shadow:var(--shadow);
}
.empty-state .icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;
  display:grid;place-items:center;background:#F1EFE9;color:var(--t2);font-size:22px;
}
.empty-state h2{font-size:22px;margin-bottom:12px;}
.empty-state p{color:var(--t2);max-width:460px;margin:0 auto 22px;}

/* ---------- 侧栏 ---------- */
.article-aside{display:none;}
@media(min-width:1280px){.article-aside{display:block;}}
.aside-card{
  position:sticky;top:94px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow);
}
.aside-card h3{font-size:16px;margin-bottom:14px;}
.aside-card p{font-size:14px;color:var(--t2);line-height:1.8;}
.aside-list{margin-top:16px;border-top:1px solid var(--line);padding-top:16px;}
.aside-list li{margin-bottom:12px;}
.aside-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--t2);transition:color .2s var(--ease);
}
.aside-list a i{font-size:12px;color:var(--t3);transition:transform .2s var(--ease);}
.aside-list a:hover{color:var(--deep);}
.aside-list a:hover i{transform:translateX(3px);color:var(--deep);}

/* ---------- 继续了解 ---------- */
.related{padding:0 0 72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(22px,2.6vw,30px);}
.section-head .more{font-size:14px;color:var(--t2);display:inline-flex;align-items:center;gap:8px;}
.section-head .more:hover{color:var(--deep);}
.section-head .more i{font-size:12px;transition:transform .2s var(--ease);}
.section-head .more:hover i{transform:translateX(4px);}
.card-grid{display:grid;gap:22px;grid-template-columns:1fr;}
@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-lg);overflow:hidden;
  box-shadow:var(--shadow);
  transition:transform .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.45);box-shadow:var(--shadow-hover);}
.card-media{position:relative;aspect-ratio:16/9;background:var(--line);overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-body h3{font-size:18px;line-height:1.4;}
.card-body p{font-size:14.5px;color:var(--t2);line-height:1.8;margin:0;}
.card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--t1);
}
.card-link i{font-size:12px;transition:transform .2s var(--ease);}
.card:hover .card-link i{transform:translateX(4px);}

/* ---------- 深色 CTA 带 ---------- */
.cta-band{background:var(--ink);color:#F2F3EE;padding:72px 0;}
.cta-band h2{font-size:clamp(24px,3.4vw,38px);color:#F2F3EE;max-width:680px;}
.cta-band p{color:rgba(255,255,255,.68);max-width:620px;margin:16px 0 28px;font-size:16px;line-height:1.85;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cta-band .btn-on-dark{color:#F2F3EE;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);border-top:1px solid rgba(255,255,255,.08);}
.footer-grid{
  display:grid;gap:34px;padding:56px 0 40px;
  grid-template-columns:1fr;
}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand .logo-text{color:#F2F3EE;}
.footer-brand p{font-size:14px;line-height:1.85;margin:16px 0 0;max-width:340px;color:rgba(255,255,255,.6);}
.footer-col h4{font-size:15px;color:#F2F3EE;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;font-size:13px;color:rgba(255,255,255,.44);
}
@media(max-width:639px){.footer-bottom{justify-content:center;text-align:center;}}

/* ---------- 移动端底部 Tab ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:grid;grid-template-columns:repeat(6,1fr);
  background:rgba(246,245,241,.95);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
@media(min-width:1024px){.mobile-tab{display:none;}}
.mobile-tab a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:58px;font-size:11px;color:var(--t3);transition:color .2s var(--ease);
}
.mobile-tab a i{font-size:18px;}
.mobile-tab a:hover{color:var(--t1);}
.mobile-tab a.active{color:var(--ink);font-weight:600;}
.mobile-tab a.active i{color:var(--deep);}
.mobile-tab a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;background:var(--lime);border-radius:0 0 2px 2px;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .42s var(--ease),transform .42s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --ink:#0E1211;
  --panel:#171B1A;
  --paper:#F6F5F1;
  --card:#FFFFFF;
  --line:#E6E3DC;
  --lime:#C6F24E;
  --clay:#FF6A3D;
  --deep:#1F6F5C;
  --t1:#121514;
  --t2:#5C6360;
  --t3:#8B918E;
  --inv1:#F2F3EE;
  --inv2:rgba(255,255,255,.68);
  --inv3:rgba(255,255,255,.44);
  --r-card:18px;
  --r-btn:999px;
  --r-input:12px;
  --shadow-1:0 2px 6px rgba(14,18,17,.05);
  --shadow-2:0 12px 28px rgba(14,18,17,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:68px;
  --tab-h:58px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  background:var(--paper);
  color:var(--t1);
  font-size:16px;
  line-height:1.8;
  padding-bottom:calc(var(--tab-h) + 16px + env(safe-area-inset-bottom));
  overflow-x:hidden;
}
body.nav-open{overflow:hidden;}
h1,h2,h3,h4{margin:0;line-height:1.16;letter-spacing:-.02em;font-weight:800;color:var(--t1);}
h1{font-size:clamp(28px,4.4vw,44px);}
h2{font-size:clamp(24px,3.4vw,36px);}
h3{font-size:clamp(17px,1.6vw,20px);line-height:1.4;letter-spacing:-.01em;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
.dark :focus-visible{outline-color:var(--lime);}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:640px){.container{padding:0 24px;}}
@media (min-width:1280px){.container{max-width:1280px;padding:0 32px;}}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(246,245,241,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:var(--nav-h);}
.logo{display:inline-flex;align-items:center;gap:10px;}
.logo-mark{
  width:32px;height:32px;border-radius:10px;background:var(--ink);color:var(--lime);
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;letter-spacing:-.03em;flex:0 0 32px;
}
.logo-text{font-weight:800;font-size:16px;letter-spacing:-.02em;white-space:nowrap;}
.nav-links{display:none;}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:26px;}
}
.nav-links a{
  position:relative;font-size:15px;color:var(--t2);padding:6px 0;
  transition:color .2s var(--ease);
}
.nav-links a:hover{color:var(--t1);}
.nav-links a.active{color:var(--t1);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;border-radius:2px;background:var(--lime);
}
.header-right{display:flex;align-items:center;gap:12px;}
.header-cta{display:none;}
@media (min-width:768px){.header-cta{display:inline-flex;}}
.menu-btn{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:var(--card);
  display:inline-flex;align-items:center;justify-content:center;color:var(--t1);
}
@media (min-width:1024px){.menu-btn{display:none;}}
.menu-btn svg{width:20px;height:20px;}

.mobile-panel{
  position:fixed;top:var(--nav-h);left:0;right:0;z-index:79;
  background:var(--paper);border-bottom:1px solid var(--line);
  max-height:0;overflow:hidden;transition:max-height .32s var(--ease);
  padding-bottom:calc(var(--tab-h) + env(safe-area-inset-bottom));
}
.mobile-panel.open{max-height:420px;}
.mobile-panel nav{display:grid;gap:2px;padding:12px 20px 20px;}
.mobile-panel nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 4px;font-size:16px;color:var(--t2);border-bottom:1px solid var(--line);
}
.mobile-panel nav a.active{color:var(--t1);font-weight:600;}
.mobile-panel nav a.active::after{content:"当前";font-size:12px;color:var(--deep);font-weight:600;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .22s var(--ease),transform .18s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  white-space:nowrap;
}
.btn svg{width:16px;height:16px;transition:transform .22s var(--ease);}
.btn:hover svg{transform:translateX(4px);}
.btn-primary{background:var(--lime);color:var(--ink);box-shadow:0 1px 2px rgba(14,18,17,.08);}
.btn-primary:hover{background:#D0F76A;box-shadow:var(--shadow-2);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t1);}
.btn-ghost:hover{border-color:var(--t1);}
.btn-ghost:active{transform:scale(.98);}
.btn:disabled,.btn[disabled]{opacity:.45;pointer-events:none;}
.dark .btn-ghost{border-color:rgba(255,255,255,.24);color:var(--inv1);}
.dark .btn-ghost:hover{border-color:var(--lime);color:var(--lime);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

/* ---------- generic ---------- */
.band{padding:64px 0;}
@media (min-width:1024px){.band{padding:88px 0;}}
.dark{background:var(--ink);color:var(--inv1);}
.dark h1,.dark h2,.dark h3,.dark h4{color:var(--inv1);}
.dark p{color:var(--inv2);}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;color:var(--deep);margin-bottom:14px;
  font-variant-numeric:tabular-nums;
}
.dark .section-head .kicker{color:var(--lime);}
.section-head p{color:var(--t2);font-size:16px;margin-top:14px;}
.dark .section-head p{color:var(--inv2);}
.rule{height:1px;background:var(--line);border:0;margin:0;}
.dark .rule{background:rgba(255,255,255,.1);}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;padding:5px 11px;border-radius:6px;
  background:rgba(31,111,92,.1);color:var(--deep);
}
.badge-clay{background:rgba(255,106,61,.12);color:#D94E22;}
.badge-line{background:transparent;border:1px solid var(--line);color:var(--t2);}
.dark .badge{background:rgba(198,242,78,.12);color:var(--lime);}

/* ---------- hero ---------- */
.page-hero{padding:calc(var(--nav-h) + 32px) 0 52px;}
@media (min-width:1024px){.page-hero{padding:calc(var(--nav-h) + 60px) 0 84px;}}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:20px;}
.crumbs a{color:var(--t2);}
.crumbs a:hover{color:var(--deep);}
.crumbs span.sep{color:var(--t3);}
.hero-grid{display:grid;gap:32px;}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:1.02fr 1fr;gap:56px;align-items:center;}
}
.hero-media{position:relative;border-radius:20px;overflow:hidden;background:var(--line);box-shadow:var(--shadow-1);}
.hero-media img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,18,17,0) 45%,rgba(14,18,17,.42) 100%);
}
.hero-media .media-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  background:rgba(14,18,17,.72);color:var(--inv1);
  font-size:13px;padding:6px 12px;border-radius:999px;backdrop-filter:blur(6px);
}
.hero-text{order:-1;}
@media (min-width:1024px){.hero-text{order:0;}}
.hero-text h1{margin:16px 0 18px;}
.hero-text .lede{font-size:17px;color:var(--t2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;
  margin-top:32px;padding-top:24px;border-top:1px solid var(--line);
}
.hero-stats .num{font-size:clamp(20px,2.2vw,28px);font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.03em;}
.hero-stats .num em{font-style:normal;font-size:14px;color:var(--t3);margin-left:2px;font-weight:600;}
.hero-stats .lbl{font-size:13px;color:var(--t3);line-height:1.5;}

/* ---------- cards ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.45);box-shadow:var(--shadow-2);}
.dark .card{background:var(--panel);border-color:rgba(255,255,255,.08);box-shadow:none;}
.dark .card:hover{border-color:rgba(198,242,78,.45);}
.card h3{margin-bottom:10px;}
.card p{color:var(--t2);font-size:15px;}
.dark .card p{color:var(--inv2);}
.grid-3{display:grid;gap:20px;}
@media (min-width:640px){.grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}}
.card-num{
  display:block;font-size:13px;font-weight:800;letter-spacing:.1em;
  font-variant-numeric:tabular-nums;color:var(--deep);margin-bottom:14px;
}
.dark .card-num{color:var(--lime);}

/* ---------- timeline ---------- */
.split{display:grid;gap:32px;}
@media (min-width:1024px){.split{grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start;}}
.sticky-media{position:relative;border-radius:20px;overflow:hidden;background:var(--line);box-shadow:var(--shadow-1);}
@media (min-width:1024px){.sticky-media{position:sticky;top:calc(var(--nav-h) + 24px);}}
.sticky-media img{width:100%;aspect-ratio:3/4;object-fit:cover;}
.sticky-media .caption{
  position:absolute;left:0;right:0;bottom:0;padding:18px;
  background:linear-gradient(180deg,rgba(14,18,17,0),rgba(14,18,17,.78));
  color:var(--inv1);font-size:14px;
}
.timeline{position:relative;}
.timeline::before{content:"";position:absolute;left:13px;top:12px;bottom:24px;width:1px;background:var(--line);}
.timeline li{position:relative;padding:0 0 30px 46px;}
.timeline li:last-child{padding-bottom:0;}
.timeline .dot{
  position:absolute;left:0;top:2px;width:27px;height:27px;border-radius:50%;
  background:var(--card);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:800;color:var(--t3);font-variant-numeric:tabular-nums;
}
.timeline li.is-key .dot{background:var(--lime);border-color:var(--lime);color:var(--ink);}
.timeline h3{font-size:17px;margin-bottom:6px;}
.timeline p{color:var(--t2);font-size:15px;}
.timeline .step-tag{display:inline-block;margin-top:10px;}

/* ---------- tags + scenario ---------- */
.tagbar{display:flex;gap:10px;overflow-x:auto;padding-bottom:4px;margin-bottom:28px;scrollbar-width:none;}
.tagbar::-webkit-scrollbar{display:none;}
.tag{
  flex:0 0 auto;font-size:13px;font-weight:600;padding:8px 14px;border-radius:999px;
  border:1px solid var(--line);background:var(--card);color:var(--t2);
}
.tag.is-on{background:var(--ink);border-color:var(--ink);color:var(--lime);}

/* ---------- tip rows ---------- */
.tip-list{border-top:1px solid var(--line);}
.tip-row{display:grid;gap:6px;padding:20px 0;border-bottom:1px solid var(--line);}
@media (min-width:768px){
  .tip-row{grid-template-columns:minmax(180px,300px) 1fr;gap:28px;align-items:baseline;}
}
.tip-row dt{font-weight:600;font-size:16px;}
.tip-row dd{margin:0;color:var(--t2);font-size:15px;}

/* ---------- faq ---------- */
.faq{max-width:820px;}
.faq details{border-bottom:1px solid var(--line);}
.faq details:first-of-type{border-top:1px solid var(--line);}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:62px;cursor:pointer;font-weight:600;font-size:16px;list-style:none;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"+";font-size:24px;line-height:1;color:var(--t3);
  transition:transform .26s var(--ease),color .26s var(--ease);flex:0 0 auto;
}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--ink);}
.faq .answer{padding:0 0 22px;color:var(--t2);font-size:15px;max-width:720px;}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(rgba(14,18,17,.9),rgba(14,18,17,.94)),url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  color:var(--inv1);
  padding:64px 0 calc(64px + var(--tab-h) + env(safe-area-inset-bottom));
}
@media (min-width:768px){.cta-band{padding:88px 0;}}
.cta-band h2{color:var(--inv1);max-width:640px;}
.cta-band .lede{color:var(--inv2);margin-top:16px;max-width:620px;}
.cta-grid{display:grid;gap:36px;margin-top:36px;}
@media (min-width:1024px){.cta-grid{grid-template-columns:1.1fr .9fr;gap:56px;align-items:start;}}
.cta-form{display:grid;gap:18px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:24px;}
.field{display:block;}
.field label{display:block;font-size:13px;color:var(--inv2);margin-bottom:8px;font-weight:600;}
.field input,.field textarea{
  width:100%;border-radius:var(--r-input);border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.06);color:#fff;padding:0 14px;height:48px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{height:112px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.36);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--lime);box-shadow:0 0 0 2px rgba(198,242,78,.4);
}
.field .hint{display:block;font-size:13px;color:var(--inv3);margin-top:8px;}
.notes{display:grid;gap:16px;align-content:start;}
.note{
  display:flex;gap:12px;padding:18px;border-radius:16px;
  border:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.03);
}
.note .idx{font-size:13px;font-weight:800;color:var(--lime);font-variant-numeric:tabular-nums;flex:0 0 auto;}
.note p{font-size:14px;color:var(--inv2);margin:0;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--inv2);padding:56px 0 32px;}
.footer-grid{display:grid;gap:32px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand .logo-text{color:var(--inv1);}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--inv3);max-width:340px;line-height:1.85;}
.footer-col h4{color:var(--inv1);font-size:15px;margin-bottom:16px;letter-spacing:0;}
.footer-col ul{display:grid;gap:12px;}
.footer-col a{font-size:14px;color:var(--inv2);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-direction:column;gap:8px;align-items:center;text-align:center;
  font-size:13px;color:var(--inv3);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;justify-content:space-between;text-align:left;}}

/* ---------- mobile tabbar ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:85;
  display:grid;grid-template-columns:repeat(5,1fr);
  background:rgba(255,255,255,.96);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  height:calc(var(--tab-h) + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
}
@media (min-width:768px){.tabbar{display:none;}}
.tab{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--t3);font-size:11px;line-height:1;
}
.tab svg{width:22px;height:22px;stroke-width:1.6;}
.tab.is-active{color:var(--t1);font-weight:600;}
.tab.is-active svg{fill:rgba(198,242,78,.28);stroke:var(--ink);}
.tab.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--lime);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .42s var(--ease),transform .42s var(--ease);}
.reveal.in{opacity:1;transform:none;}
.reveal.d1{transition-delay:.06s;}
.reveal.d2{transition-delay:.12s;}
.reveal.d3{transition-delay:.18s;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --ink:#0E1211;
  --panel:#171B1A;
  --paper:#F6F5F1;
  --card:#FFFFFF;
  --line:#E6E3DC;
  --lime:#C6F24E;
  --clay:#FF6A3D;
  --deep:#1F6F5C;
  --t1:#121514;
  --t2:#5C6360;
  --t3:#8B918E;
  --dark-t1:#F2F3EE;
  --dark-t2:rgba(255,255,255,.68);
  --dark-t3:rgba(255,255,255,.44);
  --edge:rgba(255,255,255,.08);
  --r-card:18px;
  --r-img:14px;
  --r-btn:999px;
  --shadow:0 1px 2px rgba(14,18,17,.05);
  --container:1200px;
  --nav-h:70px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--t1);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;cursor:pointer;border:0;background:none;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
@media (min-width:640px){.container{padding:0 24px;}}
@media (min-width:1024px){.container{padding:0 32px;max-width:1280px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,245,241,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  height:var(--nav-h);
  display:flex;align-items:center;gap:24px;
}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em;}
.logo-mark{
  width:32px;height:32px;border-radius:10px;
  background:var(--ink);color:var(--lime);
  display:grid;place-items:center;
  font-size:15px;font-weight:800;
}
.logo-text{font-size:16px;color:var(--t1);white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  position:relative;
  padding:8px 12px;
  font-size:15px;color:var(--t2);
  border-radius:10px;
  transition:color .2s ease,background-color .2s ease;
  white-space:nowrap;
}
.nav-links a:hover{color:var(--t1);background:rgba(14,18,17,.04);}
.nav-links a.active{color:var(--t1);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;
  height:2px;background:var(--lime);border-radius:2px;
}
.nav-cta{margin-left:8px;flex-shrink:0;}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-cta{margin-left:auto;}
}
@media (max-width:520px){
  .logo-text{font-size:14px;max-width:150px;overflow:hidden;text-overflow:ellipsis;}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background-color .22s ease,color .22s ease,transform .16s ease,box-shadow .22s ease,border-color .22s ease;
  border:1px solid transparent;
  white-space:nowrap;
}
.btn i{transition:transform .22s ease;}
.btn:hover i{transform:translateX(4px);}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:#d3f873;box-shadow:0 6px 18px rgba(14,18,17,.12);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t1);}
.btn-ghost:hover{border-color:var(--t1);}
.btn-dark-ghost{background:transparent;border-color:rgba(255,255,255,.24);color:var(--dark-t1);}
.btn-dark-ghost:hover{border-color:var(--lime);color:var(--lime);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.45;pointer-events:none;}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  color:var(--dark-t1);
  padding:72px 0 64px;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,18,17,.72) 0%,rgba(14,18,17,.86) 62%,rgba(14,18,17,.96) 100%);
}
.page-hero .container{position:relative;z-index:2;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--dark-t3);margin-bottom:22px;
}
.crumb a{color:var(--dark-t2);transition:color .2s ease;}
.crumb a:hover{color:var(--lime);}
.crumb span.sep{opacity:.5;}
.crumb .now{color:var(--dark-t2);}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;
  color:var(--lime);margin-bottom:18px;
  font-variant-numeric:tabular-nums;
}
.hero-eyebrow::before{content:"";width:22px;height:1px;background:var(--lime);display:inline-block;}
.page-hero h1{
  font-size:clamp(28px,4.4vw,44px);
  line-height:1.16;
  letter-spacing:-.02em;
  font-weight:800;
  max-width:900px;
}
.page-hero h1 em{font-style:normal;color:var(--lime);}
.hero-sub{
  margin-top:18px;
  max-width:680px;
  font-size:16px;
  line-height:1.85;
  color:var(--dark-t2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-stats{
  margin-top:44px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--edge);
  border:1px solid var(--edge);
  border-radius:16px;
  overflow:hidden;
}
.hero-stats div{
  background:rgba(23,27,26,.72);
  padding:18px 20px;
}
.hero-stats strong{
  display:block;
  font-size:24px;font-weight:800;color:var(--dark-t1);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.hero-stats span{font-size:13px;color:var(--dark-t3);}
@media (max-width:1023px){
  .page-hero{padding:56px 0 52px;}
  .hero-stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%;}
  .hero-stats strong{font-size:20px;}
}

/* ---------- sections ---------- */
.section{padding:76px 0;}
.section-paper{background:var(--paper);}
.section-white{background:#FBFAF7;}
.section-dark{background:var(--ink);color:var(--dark-t1);}
.section-dark .sec-num{color:var(--lime);}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
  margin-bottom:40px;
}
.section-dark .section-head{border-color:var(--edge);}
.sec-num{
  display:block;
  font-size:13px;font-weight:700;letter-spacing:.16em;
  color:var(--deep);
  font-variant-numeric:tabular-nums;
  margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(24px,3.2vw,34px);
  line-height:1.2;letter-spacing:-.02em;font-weight:800;
  max-width:620px;
}
.section-head p{
  max-width:440px;font-size:15px;color:var(--t2);line-height:1.8;
}
.section-dark .section-head p{color:var(--dark-t2);}
@media (max-width:639px){
  .section{padding:56px 0;}
}

/* ---------- mosaic ---------- */
.mosaic{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.mosaic .m-a{grid-column:span 7;}
.mosaic .m-b{grid-column:span 5;}
.mosaic .m-c,.mosaic .m-d,.mosaic .m-e{grid-column:span 4;}
@media (max-width:1023px){
  .mosaic .m-a,.mosaic .m-b{grid-column:span 12;}
  .mosaic .m-c,.mosaic .m-d{grid-column:span 6;}
  .mosaic .m-e{grid-column:span 12;}
}
@media (max-width:639px){
  .mosaic{grid-template-columns:1fr;gap:18px;}
  .mosaic .m-a,.mosaic .m-b,.mosaic .m-c,.mosaic .m-d,.mosaic .m-e{grid-column:auto;}
}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow);
  padding:24px;
  display:flex;flex-direction:column;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(14,18,17,.07);}
.card:hover{border-color:rgba(198,242,78,.55);}
.card-lg{padding:0;overflow:hidden;}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  background:var(--line);
  overflow:hidden;
}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.22,.61,.36,1);}
.card-lg:hover .card-media img{transform:scale(1.03);}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card h3{
  font-size:19px;line-height:1.42;font-weight:700;letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card p{font-size:14.5px;color:var(--t2);line-height:1.82;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;
  padding:4px 10px;border-radius:6px;
  background:rgba(31,111,92,.1);color:var(--deep);
  align-self:flex-start;
}
.badge-clay{background:rgba(255,106,61,.12);color:#C94A20;}
.badge-lime{background:rgba(198,242,78,.28);color:#4A6410;}
.card-link{
  margin-top:auto;padding-top:8px;
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--deep);
}
.card-link i{transition:transform .22s ease;}
.card:hover .card-link i{transform:translateX(4px);}
.card-sm h3{font-size:17px;}
.card-sm .card-icon{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:rgba(31,111,92,.09);color:var(--deep);
  font-size:16px;margin-bottom:4px;
}

/* ---------- timeline ---------- */
.timeline{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-top:8px;
}
.tl-item{
  position:relative;
  padding-top:26px;
  border-top:1px solid var(--edge);
}
.tl-item::before{
  content:"";position:absolute;top:-1px;left:0;width:44px;height:2px;background:var(--lime);
}
.tl-num{
  font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--lime);
  font-variant-numeric:tabular-nums;
}
.tl-item h3{font-size:17px;font-weight:700;margin:10px 0 8px;color:var(--dark-t1);}
.tl-item p{font-size:14px;color:var(--dark-t2);line-height:1.8;}
@media (max-width:1023px){
  .timeline{grid-template-columns:repeat(2,1fr);gap:28px 24px;}
}
@media (max-width:639px){
  .timeline{grid-template-columns:1fr;gap:0;}
  .tl-item{padding:22px 0 22px 26px;border-top:0;border-left:1px solid var(--edge);}
  .tl-item::before{top:22px;left:-1px;width:2px;height:36px;}
}

/* ---------- compare ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.compare-col{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--shadow);
}
.compare-col h3{
  font-size:18px;font-weight:700;margin-bottom:18px;
  display:flex;align-items:center;gap:10px;
}
.compare-col h3 i{font-size:15px;}
.compare-col.risk h3 i{color:var(--clay);}
.compare-col.fix h3 i{color:var(--deep);}
.compare-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 0;
  border-top:1px solid var(--line);
  font-size:15px;color:var(--t2);line-height:1.75;
}
.compare-list li:first-child{border-top:0;padding-top:0;}
.compare-list li strong{color:var(--t1);font-weight:600;}
.compare-list li .dot{
  flex-shrink:0;width:6px;height:6px;border-radius:50%;
  margin-top:10px;background:var(--clay);
}
.compare-col.fix .compare-list li .dot{background:var(--deep);}
@media (max-width:767px){
  .compare{grid-template-columns:1fr;}
}

/* ---------- feature split ---------- */
.split{
  display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
}
.split-media{
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--line);
  aspect-ratio:4/3;
  border:1px solid var(--line);
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-text h2{
  font-size:clamp(23px,3vw,32px);
  line-height:1.2;letter-spacing:-.02em;font-weight:800;margin-bottom:16px;
}
.split-text p{color:var(--t2);font-size:15.5px;margin-bottom:16px;}
.metric-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);
  border-radius:14px;overflow:hidden;margin-top:26px;
}
.metric-row div{background:var(--card);padding:16px 18px;}
.metric-row strong{
  display:block;font-size:22px;font-weight:800;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;color:var(--t1);
}
.metric-row span{font-size:13px;color:var(--t3);}
@media (max-width:1023px){
  .split{grid-template-columns:1fr;gap:28px;}
  .split-media{aspect-ratio:16/9;}
}
@media (max-width:520px){
  .metric-row{grid-template-columns:1fr;}
}

/* ---------- faq ---------- */
.faq{max-width:820px;}
.faq details{
  border-bottom:1px solid var(--line);
}
.faq details:first-of-type{border-top:1px solid var(--line);}
.faq summary{
  list-style:none;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:62px;padding:14px 0;
  font-size:16.5px;font-weight:600;color:var(--t1);
  cursor:pointer;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{
  content:"+";
  font-size:22px;font-weight:400;color:var(--t3);line-height:1;
  transition:transform .26s ease,color .26s ease;
  flex-shrink:0;
}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--deep);}
.faq summary:hover{color:var(--deep);}
.faq-body{padding:0 0 22px;font-size:15px;color:var(--t2);line-height:1.85;max-width:720px;}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
  color:var(--dark-t1);
  padding:72px 0;
  overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(14,18,17,.94) 0%,rgba(14,18,17,.82) 55%,rgba(20,64,52,.82) 100%);
}
.cta-band .container{position:relative;z-index:2;}
.cta-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.cta-grid h2{
  font-size:clamp(24px,3.2vw,34px);line-height:1.2;letter-spacing:-.02em;font-weight:800;
}
.cta-grid p{margin-top:14px;color:var(--dark-t2);font-size:15.5px;max-width:520px;}
.cta-panel{
  background:rgba(23,27,26,.82);
  border:1px solid var(--edge);
  border-radius:var(--r-card);
  padding:28px;
}
.field{margin-bottom:18px;}
.field label{
  display:block;font-size:13.5px;font-weight:600;color:var(--dark-t2);margin-bottom:8px;
}
.field input{
  width:100%;height:48px;
  padding:0 16px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(14,18,17,.6);
  color:var(--dark-t1);
  font-size:15px;
  outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder{color:rgba(255,255,255,.36);}
.field input:focus{border-color:var(--lime);box-shadow:0 0 0 2px rgba(198,242,78,.55);}
.form-note{font-size:13px;color:var(--dark-t3);margin-top:12px;line-height:1.7;}
.form-feedback{
  display:none;margin-top:14px;font-size:13.5px;color:var(--lime);
}
.form-feedback.show{display:block;}
@media (max-width:1023px){
  .cta-grid{grid-template-columns:1fr;gap:28px;}
}
@media (max-width:520px){
  .cta-band{padding:56px 0;}
  .cta-panel{padding:22px;}
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--dark-t1);padding:64px 0 28px;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;
  padding-bottom:40px;border-bottom:1px solid var(--edge);
}
.footer-brand .logo-text{color:var(--dark-t1);}
.footer-brand .logo-mark{background:var(--lime);color:var(--ink);}
.site-footer .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--dark-t2);line-height:1.85;max-width:340px;}
.footer-col h4{
  font-size:14px;font-weight:700;color:var(--dark-t1);margin-bottom:16px;letter-spacing:.02em;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{
  font-size:14px;color:var(--dark-t2);
  transition:color .2s ease;
}
.footer-col ul a:hover{color:var(--lime);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:24px;font-size:13px;color:var(--dark-t3);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1/-1;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-bottom{justify-content:center;text-align:center;}
}

/* ---------- mobile tabbar ---------- */
.tabbar{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(246,245,241,.95);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar ul{display:flex;}
.tabbar li{flex:1;}
.tabbar a{
  position:relative;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:58px;
  font-size:11px;color:var(--t3);
  transition:color .2s ease;
}
.tabbar a i{font-size:18px;line-height:1;}
.tabbar a.active{color:var(--ink);font-weight:600;}
.tabbar a.active i{color:var(--deep);}
.tabbar a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;background:var(--lime);border-radius:2px;
}
@media (max-width:767px){
  .tabbar{display:block;}
  body{padding-bottom:calc(58px + env(safe-area-inset-bottom));}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s cubic-bezier(.22,.61,.36,1),transform .4s cubic-bezier(.22,.61,.36,1);}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation:none !important;transition:none !important;}
  .btn:hover i{transform:none;}
  .card:hover{transform:none;}
}

/* roulang page: category3 */
:root{
  --ink:#0E1211;
  --panel:#171B1A;
  --paper:#F6F5F1;
  --card:#FFFFFF;
  --line:#E6E3DC;
  --lime:#C6F24E;
  --clay:#FF6A3D;
  --deep:#1F6F5C;
  --t1:#121514;
  --t2:#5C6360;
  --t3:#8B918E;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-pill:999px;
  --shadow:0 1px 2px rgba(14,18,17,.05);
  --shadow-hover:0 6px 18px rgba(14,18,17,.08);
  --nav-h:68px;
  --tab-h:58px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--t1);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  padding-top:var(--nav-h);
}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button,input{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
strong{font-weight:600;color:var(--t1)}
.num{font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:640px){.container{padding:0 24px}}
@media (min-width:1024px){.container{max-width:1240px;padding:0 32px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(246,245,241,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:var(--nav-h)}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:30px;height:30px;border-radius:9px;background:var(--lime);color:var(--ink);
  display:grid;place-items:center;font-weight:800;font-size:15px;letter-spacing:-.02em;
}
.logo-text{font-weight:800;font-size:16px;letter-spacing:-.02em;color:var(--t1);white-space:nowrap}
.nav-links{display:none}
.nav-links a{
  position:relative;padding:6px 0;font-size:14.5px;font-weight:500;color:var(--t2);
  transition:color .22s var(--ease);white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;transition:transform .28s var(--ease);
}
.nav-links a:hover{color:var(--t1)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--t1);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.header-icon{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:var(--card);
  display:grid;place-items:center;color:var(--t2);transition:color .22s var(--ease),border-color .22s var(--ease);
}
.header-icon:hover{color:var(--t1);border-color:rgba(198,242,78,.6)}
.header-icon svg{width:20px;height:20px}
.header-cta{display:none}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:22px;margin-left:12px}
  .header-cta{display:inline-flex}
  .header-icon{display:none}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  border:1px solid transparent;transition:background-color .22s var(--ease),transform .18s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  white-space:nowrap;
}
.btn .arrow{transition:transform .22s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--lime);color:var(--ink);box-shadow:0 1px 2px rgba(14,18,17,.08)}
.btn-primary:hover{background:#d2f96b;box-shadow:0 6px 16px rgba(14,18,17,.14)}
.btn-primary:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.btn-ghost{background:transparent;color:var(--t1);border-color:var(--line)}
.btn-ghost:hover{border-color:rgba(198,242,78,.7);background:rgba(198,242,78,.1)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.dark .btn-ghost{color:#F2F3EE;border-color:rgba(255,255,255,.24)}
.dark .btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.4)}

/* ---------- 内页 Hero ---------- */
.hero-inner{
  position:relative;overflow:hidden;color:#F2F3EE;background-color:var(--ink);
  background-image:linear-gradient(180deg,rgba(14,18,17,.74) 0%,rgba(14,18,17,.88) 100%),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  padding:52px 0 46px;
}
@media (min-width:1024px){.hero-inner{padding:76px 0 64px}}
.hero-inner::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:80px;
  background:linear-gradient(180deg,rgba(14,18,17,0),rgba(14,18,17,.55));
  pointer-events:none;
}
.hero-inner .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.6);margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,.68);transition:color .22s var(--ease)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb span.sep{color:rgba(255,255,255,.32)}
.breadcrumb .current{color:rgba(255,255,255,.92)}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;letter-spacing:.06em;
  color:var(--lime);border:1px solid rgba(198,242,78,.42);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:18px;
}
.hero-inner h1{
  font-size:clamp(28px,4.4vw,44px);line-height:1.14;font-weight:800;letter-spacing:-.02em;
  color:#F2F3EE;max-width:820px;
}
.hero-sub{margin-top:16px;max-width:640px;font-size:16px;line-height:1.8;color:rgba(255,255,255,.72)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-tags span{
  font-size:13px;padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.2);color:rgba(255,255,255,.78);background:rgba(255,255,255,.04);
}

/* ---------- 文档布局（粘性目录 + 长内容） ---------- */
.docs{padding:40px 0 56px}
@media (min-width:1024px){.docs{padding:64px 0 80px}}
.layout{display:grid;gap:28px}
@media (min-width:1024px){.layout{grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start}}
.toc{
  position:sticky;top:var(--nav-h);z-index:40;
  margin:0 -20px;padding:10px 20px;background:var(--paper);border-bottom:1px solid var(--line);
}
@media (min-width:640px){.toc{margin:0 -24px;padding:10px 24px}}
@media (min-width:1024px){
  .toc{
    margin:0;padding:22px 20px;top:calc(var(--nav-h) + 28px);
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow);
  }
}
.toc-title{
  font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--t3);margin-bottom:12px;
  display:none;
}
@media (min-width:1024px){.toc-title{display:block}}
.toc-list{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding-bottom:2px}
.toc-list::-webkit-scrollbar{display:none}
.toc-list a{
  flex:0 0 auto;display:block;font-size:13px;color:var(--t2);white-space:nowrap;
  padding:6px 12px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--card);
  transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);
}
.toc-list a:hover{color:var(--t1);border-color:rgba(198,242,78,.6)}
.toc-list a.active{color:var(--ink);border-color:var(--lime);background:rgba(198,242,78,.22);font-weight:600}
@media (min-width:1024px){
  .toc-list{flex-direction:column;gap:2px;overflow:visible}
  .toc-list a{
    border:0;background:transparent;border-radius:10px;padding:9px 12px;white-space:normal;
    border-left:2px solid transparent;line-height:1.5;
  }
  .toc-list a:hover{background:rgba(14,18,17,.04);border-color:transparent;border-left-color:var(--line)}
  .toc-list a.active{background:rgba(198,242,78,.18);border-color:transparent;border-left-color:var(--lime)}
}

.doc-section{padding:32px 0;border-top:1px solid var(--line);scroll-margin-top:calc(var(--nav-h) + 76px)}
.doc-section:first-child{border-top:0;padding-top:0}
@media (min-width:1024px){.doc-section{padding:40px 0;scroll-margin-top:calc(var(--nav-h) + 28px)}}
.section-num{
  font-size:13px;font-weight:800;letter-spacing:.14em;color:var(--deep);
  font-variant-numeric:tabular-nums;margin-bottom:10px;
}
.doc-section h2{
  font-size:clamp(22px,2.6vw,30px);line-height:1.2;font-weight:800;letter-spacing:-.02em;color:var(--t1);
}
.doc-section h3{font-size:17px;font-weight:700;color:var(--t1);margin-top:24px}
.doc-section p{margin-top:14px;color:var(--t2);line-height:1.85}
.doc-section p strong{color:var(--t1)}
.check-list{margin-top:18px;display:grid;gap:12px}
.check-list li{
  position:relative;padding-left:26px;color:var(--t2);line-height:1.8;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:10px;width:10px;height:10px;border-radius:3px;background:var(--lime);
}
.check-list li strong{color:var(--t1);margin-right:6px}
.note{
  margin-top:22px;padding:14px 18px;border-left:3px solid var(--lime);
  background:rgba(198,242,78,.13);border-radius:0 12px 12px 0;font-size:14.5px;color:var(--t2);
}
.note strong{color:var(--t1)}
.step-list{margin-top:20px;display:grid;gap:14px}
.step-list li{
  display:grid;grid-template-columns:32px minmax(0,1fr);gap:14px;align-items:start;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:18px 20px;
  box-shadow:var(--shadow);transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.step-list li:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.45);box-shadow:var(--shadow-hover)}
.step-idx{
  width:32px;height:32px;border-radius:10px;background:var(--ink);color:var(--lime);
  display:grid;place-items:center;font-weight:700;font-size:14px;font-variant-numeric:tabular-nums;
}
.step-list p{margin:0;font-size:15px;line-height:1.75}
.step-list strong{display:block;margin-bottom:4px;color:var(--t1)}
.figure{margin-top:26px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:var(--line)}
.figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.figure figcaption{
  background:var(--card);font-size:13px;color:var(--t3);text-align:center;padding:10px 14px;border-top:1px solid var(--line);
}
.device-grid{margin-top:22px;display:grid;gap:16px}
@media (min-width:640px){.device-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.device-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;
  box-shadow:var(--shadow);transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.device-card:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.45);box-shadow:var(--shadow-hover)}
.device-card h3{margin:14px 0 8px;font-size:17px;font-weight:700}
.device-card p{margin:0;font-size:14.5px;color:var(--t2);line-height:1.75}
.device-card ul{margin-top:12px;display:grid;gap:8px}
.device-card ul li{position:relative;padding-left:16px;font-size:14px;color:var(--t2);line-height:1.7}
.device-card ul li::before{content:"";position:absolute;left:0;top:11px;width:5px;height:5px;border-radius:50%;background:var(--t3)}
.tag{
  display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;line-height:1;
  padding:6px 12px;border-radius:6px;background:rgba(31,111,92,.1);color:var(--deep);
}
.tag-reward{background:rgba(255,106,61,.13);color:#C74A22}
.tag-ink{background:var(--ink);color:var(--lime)}
.fix-grid{margin-top:22px;display:grid;gap:16px}
@media (min-width:768px){.fix-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.fix-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:20px 22px;
  box-shadow:var(--shadow);transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.fix-item:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.45);box-shadow:var(--shadow-hover)}
.fix-item h3{margin:0 0 8px;font-size:16px}
.fix-item p{margin:0;font-size:14.5px;line-height:1.75}

/* ---------- FAQ ---------- */
.faq-section{padding:56px 0 64px;border-top:1px solid var(--line)}
@media (min-width:1024px){.faq-section{padding:80px 0 88px}}
.section-head{max-width:820px;margin:0 auto 26px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.08em;
  color:var(--deep);text-transform:none;margin-bottom:12px;
}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.2;font-weight:800;letter-spacing:-.02em;color:var(--t1)}
.section-head p{margin-top:12px;color:var(--t2);line-height:1.8}
.faq{max-width:820px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:60px;padding:14px 0;cursor:pointer;font-size:16px;font-weight:600;color:var(--t1);
  list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--ink)}
.plus{position:relative;width:18px;height:18px;flex:0 0 auto;transition:transform .3s var(--ease)}
.plus::before,.plus::after{content:"";position:absolute;background:var(--t1);border-radius:2px}
.plus::before{left:0;right:0;top:8px;height:2px}
.plus::after{top:0;bottom:0;left:8px;width:2px}
.faq details[open] .plus{transform:rotate(45deg)}
.faq .answer{padding:0 0 22px;max-width:720px;color:var(--t2);font-size:15px;line-height:1.85}

/* ---------- CTA 深色带 ---------- */
.cta-band{background:var(--ink);color:#F2F3EE;padding:56px 0 60px;position:relative;overflow:hidden}
@media (min-width:1024px){.cta-band{padding:80px 0 84px}}
.cta-band::before{
  content:"";position:absolute;top:-120px;right:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(198,242,78,.16),rgba(198,242,78,0) 68%);
}
.cta-band .container{position:relative;z-index:1}
.cta-grid{display:grid;gap:34px}
@media (min-width:1024px){.cta-grid{grid-template-columns:1.05fr .95fr;gap:64px;align-items:start}}
.cta-band h2{font-size:clamp(26px,3.2vw,38px);line-height:1.16;font-weight:800;letter-spacing:-.02em;color:#F2F3EE}
.cta-band .cta-lead{margin-top:16px;color:rgba(255,255,255,.72);line-height:1.85;max-width:520px}
.cta-points{margin-top:26px;display:grid;gap:12px}
.cta-points li{position:relative;padding-left:22px;font-size:14.5px;color:rgba(255,255,255,.68);line-height:1.7}
.cta-points li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:3px;background:rgba(198,242,78,.8);
}
.cta-form{
  background:var(--panel);border:1px solid rgba(255,255,255,.08);border-radius:var(--r-card);padding:24px;
}
@media (min-width:640px){.cta-form{padding:28px}}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;font-weight:600;color:rgba(255,255,255,.68);margin-bottom:8px}
.input{
  width:100%;height:48px;border-radius:var(--r-input);padding:0 14px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);color:#F2F3EE;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.input::placeholder{color:rgba(255,255,255,.4)}
.input:focus{outline:none;border-color:var(--lime);box-shadow:0 0 0 2px rgba(198,242,78,.32)}
.field-hint{display:block;margin-top:8px;font-size:12.5px;color:rgba(255,255,255,.44)}
.cta-form .btn{margin-top:4px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:52px 0 28px;border-top:1px solid rgba(255,255,255,.06)}
.footer-grid{display:grid;gap:32px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text{color:#F2F3EE}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:340px}
.footer-col h4{font-size:14px;font-weight:700;color:#F2F3EE;margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .22s var(--ease)}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.44);
}
@media (max-width:639px){.footer-bottom{justify-content:center;text-align:center}}

/* ---------- 移动端底部 Tab ---------- */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(246,245,241,.96);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{display:flex;gap:2px;overflow-x:auto;padding:6px 8px 8px;scrollbar-width:none}
.tabbar-inner::-webkit-scrollbar{display:none}
.tabbar a{
  position:relative;flex:0 0 auto;min-width:56px;
  display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:6px 6px 4px;font-size:11px;line-height:1.2;color:var(--t3);white-space:nowrap;
  transition:color .22s var(--ease);
}
.tabbar a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7}
.tabbar a.active{color:var(--t1);font-weight:600}
.tabbar a.active svg{stroke:var(--ink);stroke-width:2}
.tabbar a.active::before{
  content:"";position:absolute;top:-6px;left:50%;transform:translateX(-50%);
  width:24px;height:2px;border-radius:2px;background:var(--lime);
}
@media (max-width:639px){
  :root{--nav-h:60px}
  body{padding-bottom:calc(var(--tab-h) + env(safe-area-inset-bottom) + 12px)}
  .tabbar{display:block}
}

/* ---------- 进入动效 ---------- */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .38s var(--ease),transform .38s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: category4 */
:root{
  --ink:#0E1211;
  --panel:#171B1A;
  --paper:#F6F5F1;
  --card:#FFFFFF;
  --line:#E6E3DC;
  --lime:#C6F24E;
  --clay:#FF6A3D;
  --deep:#1F6F5C;
  --t1:#121514;
  --t2:#5C6360;
  --t3:#8B918E;
  --dark-1:#F2F3EE;
  --dark-2:rgba(255,255,255,.68);
  --dark-3:rgba(255,255,255,.44);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 1px 2px rgba(14,18,17,.05);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:70px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--t1);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.18}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:640px){.container{padding:0 24px}}
@media (min-width:1024px){.container{max-width:1264px;padding:0 32px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,245,241,.86);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:var(--nav-h)}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;flex:0 0 auto}
.logo-mark{
  width:30px;height:30px;border-radius:9px;background:var(--ink);color:var(--lime);
  display:grid;place-items:center;font-size:14px;line-height:1;flex:0 0 auto;
}
.logo-text{font-size:16px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
  position:relative;padding:8px 12px;font-size:14px;color:var(--t2);
  border-radius:8px;white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-links a:hover{color:var(--t1);background:rgba(14,18,17,.045)}
.nav-links a.active{color:var(--t1);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  border-radius:2px;background:var(--lime);
}
.header-cta{flex:0 0 auto;margin-left:8px;height:42px;padding:0 18px;font-size:14px}
.menu-btn{
  display:none;width:40px;height:40px;margin-left:auto;border:1px solid var(--line);
  background:var(--card);border-radius:10px;cursor:pointer;color:var(--t1);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.menu-btn:hover{border-color:var(--t1)}
.menu-btn .bar{display:block;width:16px;height:2px;background:currentColor;border-radius:2px}
.mobile-menu{display:none;border-top:1px solid var(--line);background:var(--paper)}
.mobile-menu.is-open{display:block}
.mobile-nav{display:grid;padding:8px 0 14px}
.mobile-nav a{
  padding:13px 0;font-size:15px;color:var(--t2);border-bottom:1px solid var(--line);
}
.mobile-nav a:last-child{border-bottom:0}
.mobile-nav a.active{color:var(--t1);font-weight:600}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  text-decoration:none;white-space:nowrap;
  transition:transform .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn .arrow{transition:transform .2s var(--ease)}
.btn-primary{background:var(--lime);color:var(--ink)}
.btn-primary:hover{background:#d3fa68;box-shadow:0 8px 22px rgba(198,242,78,.3);transform:translateY(-1px)}
.btn-primary:hover .arrow{transform:translateX(4px)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t1)}
.btn-ghost:hover{border-color:var(--t1);background:rgba(14,18,17,.03)}
.btn-dark-ghost{background:transparent;border-color:rgba(255,255,255,.24);color:var(--dark-1)}
.btn-dark-ghost:hover{border-color:rgba(255,255,255,.6);background:rgba(255,255,255,.07)}
.btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.hero .btn:focus-visible,.cta-band .btn:focus-visible{outline-color:var(--lime)}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}

/* ---------- Tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1.6;
}
.tag-deep{background:rgba(31,111,92,.1);color:var(--deep)}
.tag-clay{background:rgba(255,106,61,.12);color:#C9401A}
.tag-lime{background:rgba(198,242,78,.3);color:#3D570A}
.tag-dark{background:rgba(255,255,255,.1);color:var(--dark-1)}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--ink);color:var(--dark-1);overflow:hidden}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.4}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,18,17,.9) 0%,rgba(14,18,17,.6) 44%,rgba(14,18,17,.96) 100%);
}
.hero-inner{position:relative;padding-top:64px;padding-bottom:52px}
@media (min-width:768px){.hero-inner{padding-top:84px;padding-bottom:68px}}
@media (min-width:1024px){.hero-inner{padding-top:110px;padding-bottom:88px}}
.hero-copy{max-width:780px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(198,242,78,.14);border:1px solid rgba(198,242,78,.34);
  color:var(--lime);font-size:13px;font-weight:600;letter-spacing:.04em;
}
.hero h1{
  margin-top:22px;
  font-size:clamp(30px,4.6vw,50px);
  line-height:1.12;
  letter-spacing:-.02em;
}
.hero-sub{
  margin-top:20px;max-width:620px;
  font-size:clamp(15px,1.6vw,17px);
  line-height:1.85;color:rgba(255,255,255,.72);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-stats{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:1px;margin-top:46px;
  background:rgba(255,255,255,.13);
  border:1px solid rgba(255,255,255,.13);
  border-radius:16px;overflow:hidden;
}
@media (min-width:768px){.hero-stats{grid-template-columns:repeat(4,1fr)}}
.hero-stats li{
  background:rgba(14,18,17,.74);
  padding:18px;display:flex;flex-direction:column;gap:2px;
}
.stat-num{
  font-size:clamp(22px,2.6vw,28px);font-weight:800;color:var(--lime);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.stat-label{font-size:13px;color:rgba(255,255,255,.62)}

/* ---------- Sections ---------- */
.section{padding:60px 0}
@media (min-width:768px){.section{padding:84px 0}}
@media (min-width:1024px){.section{padding:100px 0}}
.section-tint{background:#FBFAF5;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-dark{background:var(--ink);color:var(--dark-1)}
.section-head{max-width:760px;margin-bottom:40px;border-top:1px solid var(--line);padding-top:26px}
.section-dark .section-head{border-top-color:rgba(255,255,255,.16)}
.section-num{
  display:block;margin-bottom:14px;
  font-size:13px;font-weight:700;letter-spacing:.18em;
  color:var(--deep);font-variant-numeric:tabular-nums;
}
.section-dark .section-num{color:var(--lime)}
.section-head h2{font-size:clamp(23px,3.2vw,36px)}
.section-head p{margin-top:16px;font-size:16px;color:var(--t2)}
.section-dark .section-head p{color:var(--dark-2)}

/* ---------- Compare ---------- */
.compare-grid{display:grid;gap:20px}
@media (min-width:900px){.compare-grid{grid-template-columns:1fr 1fr;gap:24px}}
.compare-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow);
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.compare-card:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.45)}
.compare-card.is-accent{background:#F7FBF3;border-color:rgba(31,111,92,.26)}
.compare-card h3{margin-top:14px;font-size:19px}
.compare-card .lead{margin-top:10px;font-size:14.5px;color:var(--t2)}
.compare-list{margin-top:20px}
.compare-list li{
  display:flex;gap:12px;padding:14px 0;border-top:1px solid var(--line);
  font-size:15px;color:var(--t2);
}
.compare-list li:first-child{border-top:0;padding-top:0}
.compare-list strong{display:block;font-weight:600;color:var(--t1);font-size:15px}
.mark{
  flex:0 0 auto;width:20px;height:20px;border-radius:50%;margin-top:5px;
  display:grid;place-items:center;font-size:12px;font-weight:800;line-height:1;
}
.mark-x{background:rgba(255,106,61,.14);color:#C9401A}
.mark-v{background:rgba(31,111,92,.14);color:var(--deep)}

/* ---------- Cards ---------- */
.card-grid{display:grid;gap:20px}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow);
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(198,242,78,.45)}
.card-media{position:relative;aspect-ratio:16/10;background:var(--line);overflow:hidden}
.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:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:18px}
.card-body p{font-size:14.5px;color:var(--t2)}
.card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--deep);
}
.card-link .arrow{transition:transform .2s var(--ease)}
.card-link:hover .arrow{transform:translateX(4px)}

/* ---------- Steps ---------- */
.steps{display:grid;gap:26px}
@media (min-width:900px){.steps{grid-template-columns:repeat(4,1fr);gap:24px}}
.step{position:relative;padding-top:20px;border-top:1px solid var(--line)}
.section-dark .step{border-top-color:rgba(255,255,255,.16)}
.step::before{content:"";position:absolute;top:-1px;left:0;width:36px;height:2px;background:var(--lime);border-radius:2px}
.step-num{
  font-size:12px;font-weight:700;letter-spacing:.18em;
  color:var(--deep);font-variant-numeric:tabular-nums;
}
.section-dark .step-num{color:var(--lime)}
.step h3{margin-top:12px;font-size:17px}
.section-dark .step h3{color:#FFFFFF}
.step p{margin-top:10px;font-size:14.5px;color:var(--t2)}
.section-dark .step p{color:var(--dark-2)}

/* ---------- Progress ---------- */
.progress-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow);
}
@media (min-width:768px){.progress-panel{padding:34px}}
.progress-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px}
.progress-head h3{font-size:18px}
.progress-value{font-size:26px;font-weight:800;color:var(--deep);font-variant-numeric:tabular-nums;line-height:1.2}
.progress-bar{
  height:10px;border-radius:999px;background:var(--line);
  margin:20px 0 24px;overflow:hidden;
}
.progress-bar span{
  display:block;height:100%;width:0;border-radius:999px;
  background:linear-gradient(90deg,var(--deep),var(--lime));
  transition:width .7s var(--ease);
}
.milestones{display:grid;gap:14px}
@media (min-width:768px){.milestones{grid-template-columns:repeat(3,1fr)}}
.milestone{
  display:flex;gap:12px;align-items:flex-start;
  padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--paper);
}
.milestone .dot{flex:0 0 auto;width:10px;height:10px;border-radius:50%;background:var(--t3);margin-top:8px}
.milestone h4{font-size:15px;font-weight:700}
.milestone p{margin-top:6px;font-size:13.5px;color:var(--t2)}
.milestone.is-done{border-color:rgba(31,111,92,.28)}
.milestone.is-done .dot{background:var(--deep)}
.milestone.is-active{border-color:rgba(255,106,61,.34);background:rgba(255,106,61,.05)}
.milestone.is-active .dot{background:var(--clay)}
.state-label{
  display:inline-block;margin-top:10px;font-size:12.5px;font-weight:600;
}
.is-done .state-label{color:var(--deep)}
.is-active .state-label{color:#C9401A}
.milestone .state-label{color:var(--t3)}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:62px;padding:14px 0;cursor:pointer;list-style:none;
  font-size:16.5px;font-weight:600;color:var(--t1);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";font-size:22px;font-weight:400;line-height:1;color:var(--t2);
  transition:transform .28s var(--ease),color .28s var(--ease);
}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--deep)}
.faq summary:hover{color:var(--deep)}
.faq summary:focus-visible{outline:2px solid var(--lime);outline-offset:4px;border-radius:6px}
.faq-answer{padding:0 0 24px}
.faq-answer p{font-size:15px;line-height:1.9;color:var(--t2)}
.faq-answer p + p{margin-top:12px}

/* ---------- CTA ---------- */
.cta-band{position:relative;background:var(--ink);color:var(--dark-1);overflow:hidden}
.cta-band .glow{
  position:absolute;top:-160px;right:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(198,242,78,.16),transparent 68%);
  pointer-events:none;
}
.cta-inner{position:relative;display:grid;gap:34px;padding:64px 0}
@media (min-width:1024px){
  .cta-inner{grid-template-columns:1.05fr .95fr;align-items:center;gap:60px;padding:88px 0}
}
.cta-inner h2{font-size:clamp(24px,3.2vw,34px);color:#FFFFFF}
.cta-inner .cta-sub{margin-top:16px;font-size:16px;color:var(--dark-2);max-width:520px}
.cta-form{display:grid;gap:16px;max-width:440px;margin-top:28px}
.field{display:grid;gap:8px}
.field label{font-size:13.5px;color:var(--dark-2)}
.field input{
  height:48px;width:100%;padding:0 16px;border-radius:12px;
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);
  color:var(--dark-1);transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder{color:rgba(255,255,255,.42)}
.field input:focus{outline:none;border-color:var(--lime);box-shadow:0 0 0 2px rgba(198,242,78,.32)}
.field .hint{font-size:13px;color:rgba(255,255,255,.5)}
.cta-notes{display:grid;gap:14px}
.cta-notes li{
  display:flex;gap:12px;padding:16px 18px;
  border:1px solid rgba(255,255,255,.1);border-radius:14px;background:var(--panel);
  font-size:14.5px;color:var(--dark-2);
}
.cta-notes .idx{
  flex:0 0 auto;width:24px;height:24px;border-radius:8px;background:rgba(198,242,78,.14);
  color:var(--lime);display:grid;place-items:center;font-size:12px;font-weight:700;
  font-variant-numeric:tabular-nums;
}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:var(--dark-2);padding:60px 0 26px}
.footer-grid{display:grid;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}}
.site-footer .logo{color:#FFFFFF}
.site-footer .logo-mark{background:var(--lime);color:var(--ink)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:330px}
.footer-col h4{font-size:14px;color:#FFFFFF;margin-bottom:16px;letter-spacing:.02em}
.footer-col li + li{margin-top:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  margin-top:46px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.44);
}

/* ---------- Mobile Tab Bar ---------- */
.tab-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(246,245,241,.97);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  overflow-x:auto;overflow-y:hidden;
  scrollbar-width:none;
}
.tab-bar::-webkit-scrollbar{display:none}
.tab-item{
  position:relative;flex:0 0 auto;min-width:64px;
  display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:9px 6px 8px;font-size:11px;color:var(--t3);white-space:nowrap;
  transition:color .2s var(--ease);
}
.tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tab-item.active{color:var(--t1);font-weight:600}
.tab-item.active svg{stroke:var(--deep)}
.tab-item.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--lime);
}
@media (max-width:767px){
  .tab-bar{display:flex}
  body{padding-bottom:calc(60px + env(safe-area-inset-bottom))}
}

/* ---------- Responsive nav ---------- */
@media (max-width:1023px){
  .nav-links{display:none}
  .header-cta{display:none}
  .menu-btn{display:flex}
}
@media (min-width:1024px){
  .mobile-menu{display:none !important}
}

/* ---------- Motion ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .38s var(--ease),transform .38s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
.reveal.d1{transition-delay:.06s}
.reveal.d2{transition-delay:.12s}
.reveal.d3{transition-delay:.18s}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  html{scroll-behavior:auto !important}
  .reveal{opacity:1 !important;transform:none !important}
}

/* roulang page: category5 */
:root{
  --ink:#0E1211;
  --panel:#171B1A;
  --paper:#F6F5F1;
  --card:#FFFFFF;
  --line:#E6E3DC;
  --lime:#C6F24E;
  --clay:#FF6A3D;
  --deep:#1F6F5C;
  --t1:#121514;
  --t2:#5C6360;
  --t3:#8B918E;
  --dark-t1:#F2F3EE;
  --dark-t2:rgba(255,255,255,.68);
  --dark-t3:rgba(255,255,255,.44);
  --r-card:18px;
  --r-img:14px;
  --r-btn:999px;
  --maxw:1200px;
  --header-h:70px;
  --shadow:0 1px 2px rgba(14,18,17,.05);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--t1);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.18;letter-spacing:-.02em;font-weight:800;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;}

.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:640px){ .container{padding:0 24px;} }
@media (min-width:1024px){ .container{padding:0 32px;max-width:1280px;} }

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,245,241,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:var(--header-h);
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.logo-mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  background:var(--lime);
  color:var(--ink);
  border-radius:10px;
  font-weight:800;
  font-size:17px;
  letter-spacing:0;
}
.logo-text{
  font-weight:800;
  font-size:17px;
  letter-spacing:-.02em;
  white-space:nowrap;
}
.nav-links{
  display:none;
  align-items:center;
  gap:2px;
  margin-left:auto;
}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--r-btn);
  font-size:15px;
  color:var(--t2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-links a:hover{color:var(--t1);background:rgba(14,18,17,.045);}
.nav-links a.active{color:var(--t1);font-weight:600;}
.nav-links a.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--lime);
}
.header-cta{margin-left:auto;}
@media (min-width:1024px){
  .nav-links{display:flex;}
  .header-cta{margin-left:8px;}
}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease);
}
.btn .arrow{transition:transform .2s var(--ease);}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:#d2f96a;box-shadow:0 8px 18px rgba(14,18,17,.12);}
.btn-primary:hover .arrow{transform:translateX(4px);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--t1);}
.btn-ghost:hover{border-color:rgba(14,18,17,.3);background:rgba(14,18,17,.03);}
.btn-ghost:active{transform:scale(.98);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.on-dark .btn-ghost{border-color:rgba(255,255,255,.24);color:var(--dark-t1);}
.on-dark .btn-ghost:hover{border-color:rgba(255,255,255,.5);background:rgba(255,255,255,.06);}

/* ---------- hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  color:var(--dark-t1);
  min-height:320px;
  display:flex;
  align-items:center;
  padding:56px 0 52px;
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  opacity:.9;
}
.hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,18,17,.72) 0%,rgba(14,18,17,.62) 45%,rgba(14,18,17,.88) 100%);
}
.hero .container{position:relative;z-index:2;}
.hero-grid{
  display:grid;
  gap:28px;
  align-items:end;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--lime);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;background:var(--lime);border-radius:2px;
}
.hero h1{
  font-size:clamp(28px,4.6vw,44px);
  line-height:1.14;
  margin-bottom:16px;
}
.hero h1 em{
  font-style:normal;
  color:var(--lime);
}
.hero-sub{
  font-size:16px;
  line-height:1.8;
  color:var(--dark-t2);
  max-width:620px;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.12);
  border-radius:16px;
  overflow:hidden;
}
.hero-stats div{
  padding:16px 14px;
  background:rgba(23,27,26,.72);
}
.hero-stats strong{
  display:block;
  font-size:clamp(20px,2.4vw,26px);
  font-weight:800;
  line-height:1.2;
  color:var(--dark-t1);
}
.hero-stats span{
  display:block;
  font-size:12.5px;
  color:var(--dark-t3);
  margin-top:4px;
}
@media (min-width:900px){
  .hero{padding:64px 0;}
  .hero-grid{grid-template-columns:1.35fr .9fr;gap:48px;}
}

/* ---------- sections ---------- */
.sec{padding:64px 0;}
@media (min-width:768px){ .sec{padding:80px 0;} }
.sec-dark{background:var(--ink);color:var(--dark-t1);}
.sec-panel{background:var(--panel);color:var(--dark-t1);}
.sec-head{max-width:740px;margin-bottom:36px;}
.sec-num{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--deep);
  margin-bottom:12px;
  font-variant-numeric:tabular-nums;
}
.sec-dark .sec-num,.sec-panel .sec-num{color:var(--lime);}
.sec-head h2{
  font-size:clamp(24px,3.2vw,34px);
  margin-bottom:14px;
}
.sec-sub{font-size:16px;color:var(--t2);max-width:640px;}
.sec-dark .sec-sub,.sec-panel .sec-sub{color:var(--dark-t2);}

/* ---------- index grid ---------- */
.index-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
  margin-bottom:34px;
}
@media (min-width:640px){ .index-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .index-grid{grid-template-columns:repeat(5,1fr);gap:16px;} }
.index-card{
  text-align:left;
  padding:20px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow);
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  display:flex;
  flex-direction:column;
  gap:8px;
}
.index-card:hover{
  transform:translateY(-2px);
  border-color:rgba(198,242,78,.45);
  box-shadow:0 8px 20px rgba(14,18,17,.07);
}
.index-card .idx{
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--t3);
  font-variant-numeric:tabular-nums;
}
.index-card h3{font-size:16px;line-height:1.4;}
.index-card p{font-size:13.5px;color:var(--t2);line-height:1.65;margin:0;}
.index-card.is-active{border-color:var(--lime);box-shadow:0 0 0 1px var(--lime) inset;}

/* ---------- filter bar ---------- */
.filter-bar{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding:4px 0 14px;
  margin:0 auto 8px;
  max-width:820px;
  scrollbar-width:none;
}
.filter-bar::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;
  height:38px;
  padding:0 16px;
  border-radius:var(--r-btn);
  border:1px solid var(--line);
  background:var(--card);
  font-size:14px;
  color:var(--t2);
  transition:all .2s var(--ease);
}
.chip:hover{border-color:rgba(14,18,17,.28);color:var(--t1);}
.chip.is-active{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--dark-t1);
  font-weight:600;
}
.chip:active{transform:scale(.98);}

/* ---------- faq ---------- */
.faq-list{
  max-width:820px;
  margin:0 auto;
  border-top:1px solid var(--line);
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-head{margin:0;font-size:1rem;font-weight:600;}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 2px;
  min-height:60px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  letter-spacing:-.01em;
  line-height:1.55;
  color:var(--t1);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--deep);}
.faq-icon{
  position:relative;
  flex:0 0 20px;
  width:20px;height:20px;
  transition:transform .28s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--t2);
  border-radius:2px;
  transition:background .2s var(--ease);
}
.faq-icon::before{left:3px;right:3px;top:9px;height:2px;}
.faq-icon::after{top:3px;bottom:3px;left:9px;width:2px;}
.faq-q:hover .faq-icon::before,.faq-q:hover .faq-icon::after{background:var(--deep);}
.faq-q[aria-expanded="true"] .faq-icon{transform:rotate(45deg);}
.faq-a{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .32s var(--ease);
}
.faq-item.open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a-inner > div{padding:0 2px 24px;max-width:700px;}
.faq-a-inner p{font-size:15.5px;color:var(--t2);line-height:1.85;}
.faq-a-inner ul{margin:12px 0 0;display:grid;gap:8px;}
.faq-a-inner li{
  position:relative;
  padding-left:16px;
  font-size:15px;
  color:var(--t2);
  line-height:1.75;
}
.faq-a-inner li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--lime);
}
.faq-empty{
  max-width:820px;
  margin:0 auto;
  padding:44px 20px;
  text-align:center;
  color:var(--t3);
  font-size:15px;
  border-bottom:1px solid var(--line);
}

/* ---------- steps timeline ---------- */
.steps{
  display:grid;
  gap:1px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.08);
  border-radius:20px;
  overflow:hidden;
}
@media (min-width:900px){ .steps{grid-template-columns:repeat(4,1fr);} }
.step{
  background:var(--panel);
  padding:26px 22px 28px;
  transition:background .25s var(--ease);
}
.step:hover{background:#1d2221;}
.step .s-num{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  color:var(--lime);
  letter-spacing:.1em;
  margin-bottom:14px;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;margin-bottom:10px;color:var(--dark-t1);}
.step p{font-size:14.5px;color:var(--dark-t2);line-height:1.75;margin:0;}

/* ---------- channel cards ---------- */
.cards-3{
  display:grid;
  gap:20px;
  grid-template-columns:1fr;
}
@media (min-width:640px){ .cards-3{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .cards-3{grid-template-columns:repeat(3,1fr);} }
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow);
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:12px;
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.card:hover{
  transform:translateY(-2px);
  border-color:rgba(198,242,78,.45);
  box-shadow:0 10px 24px rgba(14,18,17,.07);
}
.card h3{font-size:17px;}
.card p{font-size:14.5px;color:var(--t2);line-height:1.8;margin:0;}
.tag{
  display:inline-flex;
  align-items:center;
  align-self:flex-start;
  padding:4px 10px;
  border-radius:6px;
  font-size:13px;
  line-height:1.5;
  background:rgba(31,111,92,.1);
  color:var(--deep);
}
.tag-clay{
  background:rgba(255,106,61,.12);
  color:#c8491f;
}
.card-meta{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--t3);
  font-variant-numeric:tabular-nums;
}

/* ---------- split block ---------- */
.split{
  display:grid;
  gap:28px;
  align-items:center;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow);
  padding:24px;
}
@media (min-width:900px){
  .split{grid-template-columns:.95fr 1.05fr;gap:44px;padding:34px;}
}
.split img{
  width:100%;
  height:100%;
  max-height:360px;
  object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
}
.split h2{font-size:clamp(22px,2.8vw,30px);margin-bottom:14px;}
.check-list{display:grid;gap:12px;margin-top:18px;}
.check-list li{
  position:relative;
  padding-left:26px;
  font-size:15px;
  color:var(--t2);
  line-height:1.75;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:8px;
  width:14px;height:14px;
  border-radius:5px;
  background:rgba(198,242,78,.55);
  border:1px solid rgba(14,18,17,.12);
}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--ink);
  color:var(--dark-t1);
  padding:64px 0;
}
@media (min-width:768px){ .cta-band{padding:80px 0;} }
.cta-grid{display:grid;gap:34px;}
@media (min-width:900px){ .cta-grid{grid-template-columns:1.1fr .9fr;gap:56px;align-items:start;} }
.cta-band h2{font-size:clamp(24px,3.2vw,34px);margin-bottom:14px;}
.cta-band p{color:var(--dark-t2);font-size:15.5px;}
.form{display:grid;gap:18px;margin-top:26px;}
.field{display:grid;gap:8px;}
.field label{font-size:14px;color:var(--dark-t2);}
.field input,.field textarea{
  width:100%;
  min-height:48px;
  padding:12px 16px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.16);
  border-radius:12px;
  color:var(--dark-t1);
  font-size:15px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{min-height:110px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.36);}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:var(--lime);
  box-shadow:0 0 0 2px rgba(198,242,78,.55);
}
.form .btn{width:100%;}
@media (min-width:640px){ .form .btn{width:auto;justify-self:start;} }
.notice-list{display:grid;gap:16px;}
.notice{
  border:1px solid rgba(255,255,255,.12);
  background:var(--panel);
  border-radius:16px;
  padding:18px 20px;
}
.notice h3{font-size:15.5px;margin-bottom:8px;}
.notice p{font-size:14px;color:var(--dark-t2);margin:0;line-height:1.75;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink);
  color:var(--dark-t2);
  padding:56px 0 28px;
  border-top:1px solid rgba(255,255,255,.08);
}
.footer-grid{
  display:grid;
  gap:32px;
  grid-template-columns:1fr;
}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;} }
.footer-brand p{font-size:14px;line-height:1.8;margin-top:14px;max-width:340px;}
.footer-brand .logo-text{color:var(--dark-t1);}
.footer-col h4{font-size:14px;color:var(--dark-t1);margin-bottom:14px;letter-spacing:.02em;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--dark-t2);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;
  flex-direction:column;
  gap:8px;
  font-size:13px;
  color:var(--dark-t3);
  text-align:center;
  font-variant-numeric:tabular-nums;
}
@media (min-width:768px){
  .footer-bottom{flex-direction:row;justify-content:space-between;text-align:left;}
}

/* ---------- mobile tabbar ---------- */
.tabbar{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:70;
  display:none;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{display:grid;grid-template-columns:repeat(5,1fr);height:58px;}
.tab-item{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:11px;
  color:var(--t3);
  transition:color .2s var(--ease);
}
.tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.tab-item.is-active{color:var(--t1);font-weight:600;}
.tab-item.is-active svg{fill:rgba(198,242,78,.35);stroke:var(--t1);}
.tab-item.is-active::before{
  content:"";
  position:absolute;
  top:0;left:50%;
  transform:translateX(-50%);
  width:26px;height:2px;
  background:var(--lime);
  border-radius:2px;
}
@media (max-width:767px){
  .tabbar{display:block;}
  body{padding-bottom:calc(58px + env(safe-area-inset-bottom));}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}