/* roulang page: index */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0C111A;
  --bg-card:#151E2B;
  --bg-panel:#192734;
  --primary:#00F5A0;
  --accent:#FFC53D;
  --danger:#FF5D5D;
  --text-main:#E6EDF5;
  --text-2:#92A6BA;
  --text-3:#5C7388;
  --border:rgba(255,255,255,.08);
  --radius-lg:16px;
  --radius-md:10px;
  --radius-sm:8px;
  --font:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --container:1240px;
}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  background:var(--bg);
  color:var(--text-main);
  font-family:var(--font);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{text-decoration:none;color:inherit}
button{font-family:inherit;border:none;cursor:pointer}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 32px}
.scroll-mt{scroll-margin-top:96px}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(12,17,26,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(0,245,160,.14);
  box-shadow:0 0 0 1px rgba(255,255,255,.02),0 10px 40px rgba(0,0,0,.28);
}
.site-header:after{
  content:"";
  display:block;
  height:2px;
  background:linear-gradient(90deg,transparent,rgba(0,245,160,.55),rgba(255,197,61,.35),transparent);
  position:absolute;
  left:0;right:0;bottom:-1px;
  pointer-events:none;
}
.header-inner{
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand-logo{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:36px;height:36px;
  border-radius:10px;
  background:linear-gradient(135deg,rgba(0,245,160,.2),rgba(0,245,160,.05));
  border:1px solid rgba(0,245,160,.4);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
  box-shadow:0 0 18px -6px rgba(0,245,160,.6);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{
  font-size:18px;
  font-weight:800;
  letter-spacing:.5px;
  color:#fff;
}
.brand-text span{
  font-size:10px;
  font-weight:700;
  color:var(--primary);
  letter-spacing:.42em;
  text-transform:uppercase;
}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav a{
  position:relative;
  color:var(--text-2);
  font-size:15px;
  font-weight:500;
  padding:8px 2px;
  transition:color .2s;
  white-space:nowrap;
}
.main-nav a:hover{color:#fff}
.main-nav a.active{
  color:var(--primary);
  text-shadow:0 0 18px rgba(0,245,160,.45);
}
.main-nav a.active:after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 12px rgba(0,245,160,.8);
}
.header-actions{display:flex;align-items:center;gap:10px}
.btn-login{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  padding:0 18px;
  border-radius:8px;
  border:1px solid rgba(255,255,255,.14);
  color:#fff;
  font-size:14px;
  font-weight:600;
  background:rgba(255,255,255,.04);
  transition:.25s;
}
.btn-login:hover{
  border-color:var(--primary);
  color:var(--primary);
  box-shadow:0 0 16px -6px rgba(0,245,160,.7);
}
.btn-download-top{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  padding:0 20px;
  border-radius:8px;
  background:var(--primary);
  color:#08130f;
  font-size:14px;
  font-weight:800;
  transition:.25s;
  box-shadow:0 0 0 1px rgba(0,245,160,.3);
}
.btn-download-top:hover{
  background:#38ffb5;
  box-shadow:0 0 28px -6px rgba(0,245,160,.9);
  transform:translateY(-1px);
}
.open-nav{
  display:none;
  width:42px;height:42px;
  border-radius:8px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);
  color:#fff;
  align-items:center;
  justify-content:center;
}

/* mobile nav */
.mobile-nav{
  display:none;
  background:rgba(12,17,26,.98);
  border-top:1px solid var(--border);
  padding:18px 20px 26px;
  gap:6px 14px;
  position:absolute;
  left:0;right:0;top:72px;
}
.mobile-nav a{
  display:block;
  color:var(--text-2);
  padding:13px 8px;
  border-radius:8px;
  font-size:16px;
}
.mobile-nav a.active{color:var(--primary);background:rgba(0,245,160,.06)}
.mobile-nav .mobile-actions{display:flex;gap:10px;margin-top:14px}
.mobile-nav .mobile-actions .btn-login,.mobile-nav .mobile-actions .btn-download-top{flex:1;text-align:center}
.header-inner.open .mobile-nav{display:flex;flex-direction:column}
.header-inner.open .open-nav i{transform:rotate(45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:8px;
  font-weight:700;
  transition:.25s;
  white-space:nowrap;
}
.btn-primary{
  background:var(--primary);
  color:#08130f;
  padding:14px 28px;
  font-size:16px;
  box-shadow:0 0 0 1px rgba(0,245,160,.2),0 8px 30px -8px rgba(0,245,160,.45);
}
.btn-primary:hover{
  background:#20ffae;
  transform:translateY(-1px);
  box-shadow:0 0 32px -4px rgba(0,245,160,.8);
}
.btn-primary:active{transform:translateY(1px);filter:brightness(.94)}
.btn-ghost{
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.03);
  color:#fff;
  padding:14px 26px;
  font-size:16px;
}
.btn-ghost:hover{
  border-color:var(--primary);
  color:var(--primary);
  box-shadow:0 0 20px -8px rgba(0,245,160,.7);
}
.btn-lg{min-height:50px}
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:3px;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  padding:96px 0 72px;
}
.hero-bg{
  position:absolute;
  inset:0;
  z-index:-2;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
}
.hero-bg:after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(12,17,26,.93) 20%,rgba(12,17,26,.68) 60%,rgba(12,17,26,.45));
}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:56px;
  align-items:center;
  min-height:470px;
}
.hero-copy{max-width:660px}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--primary);
  background:rgba(0,245,160,.08);
  border:1px solid rgba(0,245,160,.28);
  padding:5px 14px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  margin-bottom:20px;
}
.hero-eyebrow:before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 12px rgba(0,245,160,.8);
}
.hero h1{
  font-size:46px;
  font-weight:800;
  line-height:1.18;
  letter-spacing:-1px;
  color:#fff;
  margin-bottom:16px;
}
.hero h1 span{
  color:var(--primary);
  text-shadow:0 0 30px rgba(0,245,160,.35);
}
.hero-sub{
  font-size:17px;
  color:var(--text-2);
  margin-bottom:32px;
  max-width:520px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags span{
  font-size:13px;
  color:var(--text-2);
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  border-radius:999px;
  padding:5px 14px;
}
.hero-visual{
  display:flex;
  justify-content:center;
  position:relative;
}
.hero-glow{
  position:absolute;
  width:420px;height:420px;
  background:radial-gradient(circle,rgba(0,245,160,.2),transparent 65%);
  z-index:-1;
  inset:-30px auto auto auto;
  right:-20px;
}
.phone-frame{
  width:280px;
  height:560px;
  border-radius:40px;
  background:linear-gradient(160deg,#2b3a4e,#111924 40%);
  padding:10px;
  box-shadow:
    0 0 0 1px rgba(255,255,255,.1),
    0 0 46px -6px rgba(0,245,160,.45),
    0 30px 80px rgba(0,0,0,.5);
}
.phone-screen{
  width:100%;
  height:100%;
  border-radius:31px;
  overflow:hidden;
  background:#0a0f16;
  position:relative;
}
.phone-screen img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}
.phone-notch{
  position:absolute;
  top:10px;left:50%;
  transform:translateX(-50%);
  width:110px;height:22px;
  background:rgba(0,0,0,.8);
  border-radius:999px;
  z-index:2;
  backdrop-filter:blur(4px);
}

/* ---------- section base ---------- */
.section{
  position:relative;
  padding:88px 0;
}
.section-alt{background:rgba(255,255,255,.015)}
.sec-head{
  margin-bottom:44px;
  max-width:680px;
}
.sec-line{
  display:block;
  width:44px;
  height:3px;
  border-radius:3px;
  background:linear-gradient(90deg,var(--primary),rgba(0,245,160,.2));
  margin-bottom:14px;
  box-shadow:0 0 14px rgba(0,245,160,.5);
}
.sec-head h2{
  font-size:30px;
  font-weight:800;
  letter-spacing:-.5px;
  color:#fff;
  line-height:1.3;
  margin-bottom:12px;
}
.sec-head p{
  color:var(--text-2);
  font-size:16px;
}

/* ---------- cards ---------- */
.card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  transition:.25s;
}
.card:hover{
  transform:translateY(-3px);
  border-color:rgba(255,255,255,.16);
  box-shadow:0 14px 40px rgba(0,0,0,.28),0 0 18px -10px rgba(0,245,160,.4);
}

/* feature board */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.feature-main{
  grid-column:span 2;
  grid-row:span 2;
  background:
    linear-gradient(0deg,rgba(12,17,26,.75),rgba(12,17,26,.4)),
    url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  min-height:360px;
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:flex-end;
  padding:30px;
  transition:.3s;
}
.feature-main:hover{
  border-color:rgba(0,245,160,.4);
  box-shadow:0 16px 44px rgba(0,0,0,.35),0 0 28px -8px rgba(0,245,160,.3);
  transform:none;
}
.feature-main:before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  background:linear-gradient(200deg,rgba(0,245,160,.14),transparent 40%);
  pointer-events:none;
}
.fm-content{position:relative;z-index:2}
.fm-icon{
  width:54px;height:54px;
  border-radius:14px;
  background:rgba(0,245,160,.12);
  border:1px solid rgba(0,245,160,.4);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
  margin-bottom:16px;
}
.fm-icon svg{width:26px;height:26px}
.feature-main h3{font-size:26px;color:#fff;font-weight:800;margin-bottom:10px}
.feature-main p{color:var(--text-2);max-width:460px;font-size:15px}
.feature-main .link-more{display:inline-flex;align-items:center;gap:6px;margin-top:18px;color:var(--primary);font-weight:600}
.feature-main .link-more:hover{gap:10px}
.feature-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:24px;
  transition:.25s;
  display:flex;
  flex-direction:column;
}
.feature-card:hover{
  border-color:rgba(255,197,61,.3);
  box-shadow:0 14px 40px rgba(0,0,0,.26);
  transform:translateY(-4px);
}
.fc-icon{
  width:46px;height:46px;
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;
  color:var(--accent);
  background:rgba(255,197,61,.08);
  border:1px solid rgba(255,197,61,.24);
}
.fc-icon svg{width:24px;height:24px}
.feature-card h4{font-size:16px;color:#fff;font-weight:700;margin-bottom:6px}
.feature-card p{font-size:14px;color:var(--text-2);line-height:1.65;flex:1}
.feature-card .link-more{
  margin-top:14px;
  font-size:14px;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:600;
}
.feature-card .link-more:hover{gap:10px}
.feature-wide{
  grid-column:span 3;
}
.feature-wide .feature-card{flex-direction:row;gap:20px;align-items:center}
.feature-wide .fc-icon{flex-shrink:0;margin-bottom:0}

/* phone carousel */
.carousel-section{padding-top:20px}
.carousel-wrap{
  position:relative;
  overflow:hidden;
  padding:20px 0 40px;
}
.carousel-track{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:24px;
  transition:transform .35s ease;
}
.phone-item{
  width:190px;
  height:370px;
  border-radius:28px;
  background:#1e2c3e;
  padding:8px;
  border:1px solid rgba(255,255,255,.1);
  opacity:.5;
  transform:scale(.92) rotate(-5deg);
  transition:.35s;
  overflow:hidden;
  flex-shrink:0;
}
.phone-item.right{transform:scale(.92) rotate(5deg)}
.phone-item img{width:100%;height:100%;object-fit:cover;border-radius:21px}
.phone-item.phone-main{
  width:240px;
  height:440px;
  border-radius:34px;
  border-color:rgba(0,245,160,.45);
  opacity:1;
  transform:scale(1) rotate(0);
  box-shadow:0 0 0 1px rgba(0,245,160,.15),0 0 36px -6px rgba(0,245,160,.5);
  z-index:3;
}
.phone-item.phone-main img{border-radius:27px}
.carousel-arrow{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  width:46px;height:46px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(21,30,43,.9);
  border:1px solid rgba(255,255,255,.1);
  color:#fff;
  z-index:5;
  transition:.2s;
  font-size:20px;
}
.carousel-arrow:hover{border-color:var(--primary);color:var(--primary);box-shadow:0 0 18px -4px rgba(0,245,160,.6)}
.carousel-arrow.prev{left:0}
.carousel-arrow.next{right:0}
.carousel-dots{
  display:flex;
  gap:10px;
  justify-content:center;
  margin-top:18px;
}
.carousel-dots i{
  width:7px;height:7px;
  border-radius:999px;
  background:rgba(255,255,255,.16);
  transition:.25s;
}
.carousel-dots i.active{
  width:26px;
  background:var(--primary);
  box-shadow:0 0 12px rgba(0,245,160,.6);
}

/* system */
.sys-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:28px;
  height:100%;
}
.sys-card h3{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  color:#fff;
  margin-bottom:20px;
}
.sys-card h3 .platform-icon{
  width:40px;height:40px;
  border-radius:10px;
  background:rgba(0,245,160,.08);
  border:1px solid rgba(0,245,160,.24);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
}
.sys-card h3 .platform-icon.ios{background:rgba(255,197,61,.08);border-color:rgba(255,197,61,.24);color:var(--accent)}
.sys-list li{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  padding:13px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
  font-size:14px;
}
.sys-list li:last-child{border-bottom:none}
.sys-list .label{color:var(--text-2)}
.sys-list .value{color:#fff;font-weight:600;font-variant-numeric:tabular-nums}
.qr-panel{
  background:var(--bg-card);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-lg);
  padding:26px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  height:100%;
  text-align:center;
  gap:16px;
}
.qr-box{
  width:148px;height:148px;
  background:#fff;
  border-radius:14px;
  padding:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 0 0 1px rgba(255,255,255,.2),0 0 32px -8px rgba(0,245,160,.45);
}
.qr-grid{
  width:100%;height:100%;
  display:grid;
  grid-template-columns:repeat(8,1fr);
  grid-template-rows:repeat(8,1fr);
  gap:2px;
}
.qr-grid i{
  background:#0b0f16;
  border-radius:1px;
}
.qr-panel p{
  color:var(--text-2);
  font-size:15px;
}

/* review */
.review-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.review-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:26px;
  display:flex;
  flex-direction:column;
  transition:.25s;
}
.review-card:hover{
  border-color:rgba(255,197,61,.3);
  transform:translateY(-4px);
  box-shadow:0 16px 40px rgba(0,0,0,.25);
}
.review-stars{
  display:flex;
  gap:3px;
  color:var(--accent);
  margin-bottom:14px;
  font-size:15px;
}
.review-card blockquote{
  font-size:15px;
  color:#c9d4df;
  line-height:1.8;
  flex:1;
  margin-bottom:18px;
}
.review-user{
  display:flex;
  align-items:center;
  gap:12px;
  border-top:1px solid rgba(255,255,255,.07);
  padding-top:16px;
}
.avatar{
  width:42px;height:42px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;
  font-weight:700;
  background:rgba(0,245,160,.16);
  color:var(--primary);
  border:1px solid rgba(0,245,160,.2);
}
.avatar.b{background:rgba(255,197,61,.14);color:var(--accent);border-color:rgba(255,197,61,.24)}
.avatar.c{background:rgba(255,255,255,.08);color:#c9d4df;border-color:rgba(255,255,255,.14)}
.review-user .user-info strong{display:block;font-size:14px;color:#fff}
.review-user .user-info span{font-size:12px;color:var(--text-3)}

/* latest news */
.news-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px;
}
.news-card{
  display:flex;
  gap:16px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:14px;
  min-height:126px;
  transition:.25s;
}
.news-card:hover{
  transform:translateY(-3px);
  border-color:rgba(0,245,160,.24);
  box-shadow:0 12px 34px rgba(0,0,0,.24);
}
.news-thumb{
  width:170px;
  height:100px;
  border-radius:12px;
  overflow:hidden;
  flex-shrink:0;
  background:#0d1520;
}
.news-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s;
}
.news-card:hover .news-thumb img{transform:scale(1.05)}
.news-body{
  display:flex;
  flex-direction:column;
  min-width:0;
  flex:1;
}
.news-badge{
  display:inline-flex;
  width:fit-content;
  background:rgba(0,245,160,.08);
  border:1px solid rgba(0,245,160,.25);
  color:var(--primary);
  font-size:11px;
  padding:2px 10px;
  border-radius:999px;
  margin-bottom:8px;
}
.news-body h3{
  font-size:16px;
  line-height:1.4;
  font-weight:700;
  margin-bottom:6px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-body h3 a{color:#fff;transition:color .2s}
.news-body h3 a:hover{color:var(--primary)}
.news-body p{
  font-size:13px;
  color:var(--text-2);
  display:-webkit-box;
  -webkit-line-clamp:1;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:6px;
}
.news-meta{
  font-size:12px;
  color:var(--text-3);
  display:flex;
  align-items:center;
  gap:14px;
  margin-top:auto;
}
.news-empty{
  grid-column:1/-1;
  color:var(--text-2);
  background:rgba(255,255,255,.02);
  border:1px dashed rgba(255,255,255,.12);
  border-radius:var(--radius-lg);
  padding:40px;
  text-align:center;
}

/* faq */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  margin-bottom:12px;
  overflow:hidden;
  transition:.2s;
}
.faq-item[open]{
  border-color:rgba(0,245,160,.26);
  box-shadow:0 0 0 1px rgba(0,245,160,.06),0 12px 30px rgba(0,0,0,.16);
}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  gap:14px;
  padding:18px 22px;
  font-size:16px;
  color:#fff;
  font-weight:600;
  user-select:none;
  transition:color .2s;
  position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";
  width:5px;height:18px;
  border-radius:3px;
  background:var(--primary);
  box-shadow:0 0 12px var(--primary);
  flex-shrink:0;
  transition:.2s;
}
.faq-item summary::after{
  content:"+";
  margin-left:auto;
  color:var(--primary);
  font-size:22px;
  font-weight:400;
  transition:.25s;
  flex-shrink:0;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{color:var(--primary)}
.faq-item .faq-answer{
  padding:0 22px 20px 41px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.85;
}

/* final cta */
.cta-zone{
  padding:78px 0;
}
.cta-panel{
  position:relative;
  border-radius:24px;
  border:1px solid rgba(0,245,160,.25);
  background:
    linear-gradient(rgba(12,17,26,.72),rgba(12,17,26,.82)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding:56px 48px;
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  overflow:hidden;
  box-shadow:0 0 60px -18px rgba(0,245,160,.3),inset 0 0 90px rgba(0,0,0,.25);
}
.cta-panel:before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(ellipse at top,rgba(0,245,160,.16),transparent 55%);
}
.cta-panel h2{
  position:relative;
  font-size:36px;
  font-weight:800;
  color:#fff;
  margin-bottom:12px;
  letter-spacing:-.5px;
}
.cta-panel h2 span{color:var(--primary)}
.cta-panel > p{
  position:relative;
  max-width:560px;
  color:var(--text-2);
  margin-bottom:32px;
}
.cta-buttons{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px;
}
.btn-download{
  display:inline-flex;
  align-items:center;
  gap:9px;
  background:var(--primary);
  color:#08130f;
  font-size:15px;
  font-weight:800;
  padding:14px 24px;
  border-radius:8px;
  transition:.25s;
}
.btn-download:hover{
  background:#38ffb5;
  transform:translateY(-2px);
  box-shadow:0 10px 30px -6px rgba(0,245,160,.7);
}
.btn-download svg{width:20px;height:20px}
.btn-download.is-out{
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.18);
  color:#fff;
  box-shadow:none;
}
.btn-download.is-out:hover{
  border-color:var(--primary);
  color:var(--primary);
  box-shadow:0 0 22px -8px rgba(0,245,160,.6);
  background:transparent;
}
.cta-version{
  position:relative;
  margin-top:22px;
  color:var(--text-3);
  font-size:13px;
  display:inline-flex;
  gap:14px;
}

/* footer */
.site-footer{
  background:#090d14;
  border-top:1px solid var(--border);
  position:relative;
  padding:58px 0 0;
}
.site-footer:before{
  content:"";
  display:block;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(0,245,160,.5),rgba(255,197,61,.3),transparent);
  position:absolute;
  top:0;left:0;right:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1.2fr 1.2fr;
  gap:40px;
  padding-bottom:40px;
}
.footer-brand .brand-logo{margin-bottom:12px}
.footer-brand p{
  color:var(--text-3);
  font-size:14px;
  line-height:1.85;
  max-width:320px;
}
.footer-title{
  color:#fff;
  font-size:16px;
  font-weight:700;
  margin-bottom:16px;
}
.footer-nav a{
  display:block;
  color:var(--text-3);
  padding:7px 0;
  font-size:14px;
  transition:.2s;
}
.footer-nav a:hover{color:var(--primary);padding-left:5px}
.footer-info-list li{
  color:var(--text-3);
  font-size:14px;
  padding:6px 0;
}
.footer-copy{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-3);
  font-size:13px;
  text-align:center;
  flex-direction:column;
  gap:4px;
}
.footer-copy a{color:var(--text-3)}
.footer-copy a:hover{color:var(--primary)}

/* media query */
@media (max-width:1100px){
  .main-nav,.header-actions .btn-login,.header-actions .btn-download-top{display:none}
  .open-nav{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:42px}
  .hero-visual{order:2;padding-top:10px}
  .hero h1{font-size:40px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .section{padding:64px 0}
  .hero{padding:70px 0 50px}
  .hero h1{font-size:34px}
  .hero-sub{font-size:16px}
  .container{padding:0 20px}
  .feature-grid{display:flex;flex-direction:column}
  .feature-wide{grid-column:auto}
  .phone-frame{width:240px;height:470px}
  .review-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .news-thumb{width:130px;height:88px}
  .phone-item{width:150px;height:300px}
  .phone-item.phone-main{width:200px;height:380px}
  .faq-wrap{padding:0}
  .cta-panel{padding:40px 24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .header-inner.open .mobile-nav{display:flex;flex-direction:column}
}
@media (max-width:520px){
  .hero h1{font-size:30px}
  .carousel-track{gap:12px}
  .phone-item{display:none}
  .phone-item.phone-main{display:block}
  .carousel-arrow.prev{left:-6px}
  .carousel-arrow.next{right:-6px}
  .cta-buttons{width:100%;flex-direction:column;align-items:stretch}
  .footer-copy{font-size:12px;line-height:1.6}
  .news-thumb{width:110px;height:82px}
  .feature-main{min-height:300px;padding:20px}
  .feature-main h3{font-size:20px}
}

/* roulang page: category1 */
:root {
      --bg: #0C111A;
      --bg-deep: #090D14;
      --surface: #151E2B;
      --surface-2: #192734;
      --primary: #00F5A0;
      --accent: #FFC53D;
      --text: #E6EDF5;
      --muted: #92A6BA;
      --dim: #5C7388;
      --border: rgba(255, 255, 255, 0.08);
      --border-strong: rgba(255, 255, 255, 0.16);
      --radius-lg: 16px;
      --radius-md: 10px;
      --radius-sm: 8px;
      --shadow-glow: 0 0 0 1px rgba(0, 245, 160, 0.2), 0 0 20px -4px rgba(0, 245, 160, 0.45);
      --font-cn: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: var(--font-cn);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      display: block;
      object-fit: cover;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    button {
      font-family: inherit;
    }

    h1, h2, h3, h4 {
      margin: 0;
      font-weight: 800;
      line-height: 1.25;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 32px;
      padding-right: 32px;
    }

    section {
      scroll-margin-top: 90px;
    }

    a:focus-visible,
    button:focus-visible {
      outline: 3px solid var(--primary);
      outline-offset: 3px;
      border-radius: 6px;
    }

    .txt-num {
      font-variant-numeric: tabular-nums;
      font-feature-settings: "tnum";
    }

    .neon-line {
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 245, 160, 0.75), transparent);
      border: none;
    }

    /* site header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      background: rgba(12, 17, 26, 0.78);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 10px 30px -20px rgba(0, 0, 0, 0.7);
    }

    .site-header::after {
      content: "";
      display: block;
      height: 1px;
      background: linear-gradient(90deg, rgba(0, 245, 160, 0.25), rgba(0, 245, 160, 0.6), rgba(0, 245, 160, 0.25));
      position: relative;
      z-index: 61;
    }

    .header-inner {
      min-height: 72px;
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: rgba(0, 245, 160, 0.12);
      border: 1px solid rgba(0, 245, 160, 0.45);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 18px -6px rgba(0, 245, 160, 0.5);
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.05;
    }

    .brand-text strong {
      font-size: 17px;
      letter-spacing: 0.5px;
      color: #EFF6FF;
      font-weight: 800;
      white-space: nowrap;
    }

    .brand-text span {
      font-size: 12px;
      color: var(--primary);
      letter-spacing: 4px;
      margin-top: 4px;
      font-weight: 700;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-left: 18px;
    }

    .main-nav a {
      position: relative;
      padding: 9px 16px;
      border-radius: 8px;
      font-size: 15px;
      color: #C5D3E1;
      font-weight: 500;
      transition: all 0.2s ease;
    }

    .main-nav a:hover {
      color: #ffffff;
      background: rgba(255, 255, 255, 0.04);
    }

    .main-nav a.active {
      color: var(--primary);
      font-weight: 700;
      background: rgba(0, 245, 160, 0.08);
      box-shadow: inset 0 0 0 1px rgba(0, 245, 160, 0.12);
      text-shadow: 0 0 16px rgba(0, 245, 160, 0.35);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-left: auto;
    }

    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border);
      color: #E6EDF5;
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      border-radius: 8px;
      font-size: 15px;
      font-weight: 700;
      border: 1px solid transparent;
      cursor: pointer;
      line-height: 1.2;
      transition: all 0.22s ease;
    }

    .btn-primary {
      background: var(--primary);
      color: #0B110D;
      box-shadow: 0 0 22px -8px rgba(0, 245, 160, 0.7);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      filter: brightness(1.08);
      box-shadow: 0 0 0 1px rgba(0, 245, 160, 0.3), 0 8px 32px -10px rgba(0, 245, 160, 0.9);
    }

    .btn-primary:active {
      transform: translateY(0);
      filter: brightness(0.94);
    }

    .btn-ghost {
      background: transparent;
      border-color: var(--border-strong);
      color: #E6EDF5;
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
      text-shadow: 0 0 12px rgba(0, 245, 160, 0.25);
      box-shadow: 0 0 20px -10px rgba(0, 245, 160, 0.5);
    }

    .btn-amber {
      background: var(--accent);
      color: #1B1403;
    }

    .btn-amber:hover {
      transform: translateY(-1px);
      filter: brightness(1.05);
      box-shadow: 0 0 22px -6px rgba(255, 197, 61, 0.8);
    }

    .mobile-nav {
      display: none;
      background: #0A0F17;
      border-bottom: 1px solid rgba(0, 245, 160, 0.2);
      padding: 12px 20px 20px;
    }

    .mobile-nav.open {
      display: block;
    }

    .mobile-nav a {
      display: block;
      padding: 12px 12px;
      border-radius: 8px;
      font-size: 16px;
      color: var(--text);
    }

    .mobile-nav a:hover {
      background: rgba(255, 255, 255, 0.05);
      color: #fff;
    }

    .mobile-nav a.active {
      color: var(--primary);
      background: rgba(0, 245, 160, 0.08);
    }

    .mobile-actions {
      margin-top: 14px;
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    /* page hero */
    .page-hero {
      position: relative;
      padding: 64px 0 56px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      overflow: hidden;
    }

    .page-hero:before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(12, 17, 26, 0.82) 0%, rgba(12, 17, 26, 0.9) 100%);
    }

    .page-hero .hero-inner {
      position: relative;
      z-index: 2;
    }

    .crumb {
      display: inline-flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--muted);
      margin-bottom: 18px;
    }

    .crumb a:hover {
      color: var(--primary);
    }

    .crumb svg {
      width: 14px;
      height: 14px;
      color: var(--dim);
    }

    .page-hero .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 245, 160, 0.1);
      border: 1px solid rgba(0, 245, 160, 0.3);
      color: var(--primary);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 16px;
      box-shadow: 0 0 24px -12px rgba(0, 245, 160, 0.8);
    }

    .page-hero h1 {
      font-size: clamp(28px, 4vw, 42px);
      color: #F0F7FF;
      letter-spacing: 0.5px;
      max-width: 820px;
    }

    .page-hero h1 .txt-accent {
      color: var(--primary);
    }

    .page-hero .lead {
      color: #A9BCCE;
      max-width: 720px;
      margin-top: 18px;
      font-size: 16px;
    }

    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 26px;
    }

    .hero-meta .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(21, 30, 43, 0.75);
      border: 1px solid var(--border);
      padding: 8px 14px;
      border-radius: 10px;
      font-size: 13px;
      color: #C5D3E1;
      backdrop-filter: blur(6px);
    }

    .hero-meta .meta-item .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 10px var(--primary);
    }

    .hero-meta .meta-item.accent .dot {
      background: var(--accent);
      box-shadow: 0 0 10px var(--accent);
    }

    /* section structure */
    .site-main {
      overflow: hidden;
    }

    .section-block {
      padding: 76px 0;
    }

    .section-block.tight {
      padding: 56px 0;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }

    .section-head .sec-tag {
      color: var(--primary);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 4px;
      text-transform: uppercase;
      display: block;
      margin-bottom: 8px;
    }

    .section-head h2 {
      font-size: clamp(24px, 3vw, 32px);
      color: #F0F7FF;
    }

    .section-head .sec-desc {
      color: var(--muted);
      max-width: 420px;
      font-size: 15px;
      margin-top: 8px;
    }

    .hairline-top {
      border-top: 1px solid var(--border);
    }

    .bg-deep-section {
      background: linear-gradient(180deg, rgba(12,17,26,0.35) 0%, rgba(21,30,43,0.55) 100%);
    }

    /* feature overview strip */
    .overview-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .overview-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 22px 22px 24px;
      position: relative;
      overflow: hidden;
      transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    }

    .overview-card:hover {
      transform: translateY(-3px);
      border-color: rgba(0, 245, 160, 0.35);
      box-shadow: 0 10px 40px -16px rgba(0, 0, 0, 0.6), 0 0 24px -10px rgba(0, 245, 160, 0.4);
    }

    .overview-card .ov-icon {
      width: 42px;
      height: 42px;
      border-radius: 11px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      background: rgba(0, 245, 160, 0.1);
      margin-bottom: 14px;
    }

    .overview-card:nth-child(2) .ov-icon {
      color: var(--accent);
      background: rgba(255, 197, 61, 0.12);
    }

    .overview-card h3 {
      font-size: 17px;
      color: #EAF2FA;
      margin-bottom: 6px;
    }

    .overview-card p {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.7;
      margin: 0;
    }

    /* news cards */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 16px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
    }

    .news-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 245, 160, 0.45);
      box-shadow: 0 20px 50px -30px rgba(0, 0, 0, 0.8), 0 0 30px -12px rgba(0, 245, 160, 0.5);
    }

    .news-card .thumb {
      position: relative;
      height: 172px;
      overflow: hidden;
      background: #192734;
    }

    .news-card .thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .news-card:hover .thumb img {
      transform: scale(1.04);
    }

    .news-card .thumb .badge {
      position: absolute;
      left: 12px;
      top: 12px;
      background: rgba(12, 17, 26, 0.7);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(0, 245, 160, 0.3);
      color: var(--primary);
      font-size: 12px;
      padding: 2px 9px;
      border-radius: 5px;
      font-weight: 600;
    }

    .news-card .thumb .badge.amber-badge {
      border-color: rgba(255, 197, 61, 0.4);
      color: var(--accent);
    }

    .news-card .card-body {
      padding: 20px 20px 22px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .news-card .card-date {
      font-size: 12px;
      color: var(--dim);
      letter-spacing: 0.4px;
      margin-bottom: 7px;
    }

    .news-card h3 {
      font-size: 18px;
      line-height: 1.5;
      color: #EAF2FA;
      margin-bottom: 8px;
    }

    .news-card h3 a:hover {
      color: var(--primary);
    }

    .news-card .card-desc {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.75;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin: 0 0 16px;
    }

    .news-card .card-link {
      margin-top: auto;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-weight: 600;
      font-size: 14px;
    }

    .news-card .card-link:hover {
      text-shadow: 0 0 10px rgba(0, 245, 160, 0.4);
    }

    .news-card .card-link svg {
      width: 14px;
      height: 14px;
      transition: transform 0.2s ease;
    }

    .news-card .card-link:hover svg {
      transform: translateX(3px);
    }

    /* data panel split */
    .data-split {
      display: grid;
      grid-template-columns: 1.25fr 0.75fr;
      gap: 24px;
      align-items: stretch;
    }

    .data-panel {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 26px;
      position: relative;
    }

    .data-panel .panel-title {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 20px;
    }

    .data-panel .panel-title svg {
      color: var(--primary);
    }

    .data-panel .panel-title h3 {
      font-size: 18px;
      color: #EAF2FA;
    }

    .data-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .data-list li {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 14px 2px;
      border-bottom: 1px solid var(--border);
      font-size: 14px;
    }

    .data-list li:last-child {
      border-bottom: none;
    }

    .data-list .item-label {
      color: var(--muted);
    }

    .data-list .item-value {
      color: #D6E4F0;
      font-weight: 700;
      font-size: 17px;
    }

    .data-list .item-value.green {
      color: var(--primary);
    }

    .data-list .item-value.amber {
      color: var(--accent);
    }

    .version-sticker {
      text-align: center;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      height: 100%;
      padding: 20px 10px;
    }

    .qr-sim {
      width: 112px;
      height: 112px;
      background: #F0F6FC;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      box-shadow: 0 0 0 4px rgba(0, 245, 160, 0.15);
    }

    .qr-sim svg {
      width: 78px;
      height: 78px;
    }

    /* path steps */
    .path-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .path-step {
      background: var(--surface-2);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 24px 20px;
      position: relative;
      transition: all 0.24s ease;
    }

    .path-step:hover {
      transform: translateY(-3px);
      border-color: rgba(0, 245, 160, 0.35);
      box-shadow: 0 0 34px -14px rgba(0, 245, 160, 0.5);
    }

    .path-step .step-no {
      font-size: 13px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: 2px;
      background: rgba(0, 245, 160, 0.09);
      display: inline-block;
      padding: 3px 10px;
      border-radius: 6px;
    }

    .path-step h3 {
      font-size: 16px;
      margin: 14px 0 6px;
      color: #EDF4FB;
    }

    .path-step p {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.7;
      margin: 0;
    }

    /* FAQ */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 14px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-item.open {
      border-color: rgba(0, 245, 160, 0.35);
      box-shadow: 0 0 26px -16px rgba(0, 245, 160, 0.4);
    }

    .faq-q {
      display: flex;
      align-items: center;
      gap: 12px;
      width: 100%;
      background: transparent;
      border: none;
      padding: 18px 20px;
      color: #E6EDF5;
      font-size: 16px;
      text-align: left;
      font-weight: 600;
      cursor: pointer;
      line-height: 1.4;
    }

    .faq-q:before {
      content: "";
      display: block;
      width: 3px;
      border-radius: 99px;
      background: var(--primary);
      box-shadow: 0 0 10px var(--primary);
      margin-right: 2px;
      align-self: stretch;
      flex-shrink: 0;
    }

    .faq-q .plus {
      margin-left: auto;
      color: var(--primary);
      font-size: 20px;
      font-weight: 300;
      transition: transform 0.25s ease;
    }

    .faq-item.open .faq-q .plus {
      transform: rotate(45deg);
    }

    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.32s ease;
    }

    .faq-a-inner {
      padding: 0 22px 18px 38px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.9;
    }

    /* CTA band */
    .cta-band {
      background: var(--bg-deep);
      padding: 70px 0;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .cta-band:before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(9, 13, 20, 0.84);
    }

    .cta-band .container {
      position: relative;
      z-index: 2;
    }

    .cta-box {
      background: rgba(21, 30, 43, 0.8);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 20px;
      box-shadow: 0 0 0 1px rgba(0, 245, 160, 0.08), 0 30px 80px -40px rgba(0, 245, 160, 0.45);
      padding: 42px;
      text-align: center;
    }

    .cta-box h2 {
      color: #F3F9FF;
      font-size: clamp(24px, 3vw, 32px);
    }

    .cta-box p {
      color: #A9BCCE;
      max-width: 620px;
      margin: 16px auto 28px;
    }

    .cta-btn-group {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 14px;
    }

    .cta-meta {
      margin-top: 22px;
      font-size: 13px;
      color: var(--dim);
    }

    /* footer */
    .site-footer {
      background: #080C13;
      background-image: linear-gradient(180deg, #0A0E15 0%, #070B11 100%);
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      position: relative;
    }

    .site-footer::before {
      content: "";
      display: block;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 245, 160, 0.6), rgba(255, 197, 61, 0.5), transparent);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 36px;
      padding: 54px 0 40px;
    }

    .footer-brand a.brand-logo {
      margin-bottom: 12px;
    }

    .footer-brand p {
      color: var(--muted);
      font-size: 14px;
      max-width: 300px;
      margin: 14px 0 0;
      line-height: 1.85;
    }

    .footer-title {
      color: #EFF6FC;
      font-weight: 700;
      margin-bottom: 16px;
      font-size: 15px;
      letter-spacing: 0.4px;
    }

    .footer-nav {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-nav a {
      color: var(--muted);
      font-size: 14px;
      width: fit-content;
    }

    .footer-nav a:hover {
      color: var(--primary);
    }

    .footer-info-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
      color: var(--muted);
      font-size: 14px;
    }

    .footer-copy {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 10px;
      border-top: 1px solid var(--border);
      padding: 20px 0 24px;
      color: #60758B;
      font-size: 13px;
    }

    /* responsive */
    @media (max-width: 1080px) {
      .overview-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .path-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 960px) {
      .header-inner {
        min-height: 68px;
      }
      .main-nav {
        display: none;
      }
      .header-actions .btn-ghost,
      .header-actions .btn-primary {
        display: none;
      }
      .nav-toggle {
        display: inline-flex;
      }
      .section-block {
        padding: 56px 0;
      }
      .data-split {
        grid-template-columns: 1fr;
      }
      .version-sticker {
        padding-top: 6px;
      }
      .page-hero {
        padding: 52px 0 48px;
      }
    }

    @media (max-width: 760px) {
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }
      .news-grid {
        grid-template-columns: 1fr;
      }
      .overview-grid {
        grid-template-columns: 1fr;
      }
      .path-grid {
        grid-template-columns: 1fr;
      }
      .cta-box {
        padding: 30px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
        padding-top: 40px;
      }
      .footer-copy {
        flex-direction: column;
      }
    }

    @media (max-width: 520px) {
      .brand-text strong {
        font-size: 15px;
      }
      .brand-text span {
        font-size: 10px;
      }
      .data-panel {
        padding: 20px;
      }
      .hero-meta .meta-item {
        width: 100%;
      }
    }

/* roulang page: article */
:root {
      --bg: #0C111A;
      --surface: #151E2B;
      --surface-2: #192734;
      --surface-3: #101823;
      --primary: #00F5A0;
      --accent: #FFC53D;
      --danger: #FF5D5D;
      --text: #E6EDF5;
      --muted: #92A6BA;
      --faint: #5C7388;
      --border: rgba(255, 255, 255, 0.08);
      --border-strong: rgba(255, 255, 255, 0.16);
      --radius-lg: 16px;
      --radius-md: 10px;
      --radius-sm: 8px;
      --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", Roboto, sans-serif;
      --glow: 0 0 0 1px rgba(0, 245, 160, 0.18), 0 8px 30px -8px rgba(0, 245, 160, 0.28);
      --shadow-card: 0 20px 40px rgba(0, 0, 0, 0.22);
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 90px;
    }

    body {
      margin: 0;
      background:
        radial-gradient(1100px 420px at 85% -4%, rgba(0, 245, 160, 0.07), transparent 60%),
        radial-gradient(860px 360px at 0% 8%, rgba(255, 197, 61, 0.05), transparent 55%),
        var(--bg);
      color: var(--text);
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    body.menu-open {
      overflow: hidden;
    }

    img {
      max-width: 100%;
      display: inline-block;
      vertical-align: bottom;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, border-color .2s ease, background-color .2s ease, box-shadow .2s ease, transform .2s ease;
    }

    button {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .section {
      padding: 84px 0;
      scroll-margin-top: 80px;
    }

    .page-hero {
      position: relative;
      padding: 70px 0 58px;
      background:
        linear-gradient(180deg, rgba(12, 17, 26, 0.72) 0%, rgba(12, 17, 26, 0.92) 100%),
        url("/assets/images/backpic/back-1.webp") center / cover no-repeat var(--surface);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      overflow: hidden;
    }

    .page-hero::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 245, 160, 0.7), rgba(255, 197, 61, 0.35), transparent);
      box-shadow: 0 0 12px rgba(0, 245, 160, 0.5);
      pointer-events: none;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 90;
      background: rgba(12, 17, 26, 0.82);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border);
    }

    .header-inner {
      min-height: 70px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 26px;
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
      line-height: 1.2;
    }

    .brand-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      color: var(--primary);
      background: rgba(0, 245, 160, 0.08);
      border: 1px solid rgba(0, 245, 160, 0.24);
      box-shadow: 0 0 16px rgba(0, 245, 160, 0.12);
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      gap: 0;
    }

    .brand-text strong {
      display: block;
      color: #FFFFFF;
      font-size: 16px;
      letter-spacing: .04em;
      white-space: nowrap;
    }

    .brand-text > span {
      display: block;
      color: var(--primary);
      font-size: 11px;
      letter-spacing: .22em;
      margin-top: 2px;
      text-shadow: 0 0 12px rgba(0, 245, 160, 0.34);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 30px;
    }

    .main-nav a {
      position: relative;
      padding: 8px 2px;
      font-size: 15px;
      color: var(--muted);
      white-space: nowrap;
    }

    .main-nav a:hover {
      color: #FFFFFF;
    }

    .main-nav a.active {
      color: var(--primary);
      text-shadow: 0 0 14px rgba(0, 245, 160, 0.3);
    }

    .main-nav a.active::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 2px;
      height: 2px;
      border-radius: 2px;
      background: linear-gradient(90deg, transparent, var(--primary), transparent);
      box-shadow: 0 0 9px var(--primary);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 42px;
      padding: 0 18px;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      font-weight: 700;
      font-size: 14px;
      letter-spacing: .02em;
      cursor: pointer;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
    }

    .btn:focus-visible,
    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 3px;
    }

    .btn-primary {
      background: var(--primary);
      color: #06150D;
      box-shadow: 0 0 0 1px rgba(0, 245, 160, 0.18), 0 8px 22px -10px rgba(0, 245, 160, 0.65);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      color: #031008;
      background: #36FFB2;
      box-shadow: 0 0 0 1px rgba(0, 245, 160, 0.3), 0 12px 32px -8px rgba(0, 245, 160, 0.55);
    }

    .btn-primary:active {
      transform: translateY(0);
      background: #00DB8D;
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.03);
      border-color: rgba(255, 255, 255, 0.22);
      color: #DCE6F1;
    }

    .btn-ghost:hover {
      border-color: rgba(0, 245, 160, 0.7);
      color: var(--primary);
      box-shadow: 0 0 18px rgba(0, 245, 160, 0.08);
    }

    .btn-outline-accent {
      border-color: rgba(255, 197, 61, 0.5);
      color: var(--accent);
      background: rgba(255, 197, 61, 0.04);
    }

    .btn-outline-accent:hover {
      border-color: var(--accent);
      color: #FFD877;
      box-shadow: 0 0 18px rgba(255, 197, 61, 0.12);
    }

    .nav-toggle {
      display: none;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 42px;
      border: 1px solid var(--border);
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text);
      cursor: pointer;
    }

    .nav-toggle:hover {
      border-color: rgba(0, 245, 160, 0.6);
      color: var(--primary);
    }

    .nav-close-icon {
      display: none;
    }

    .nav-toggle.open .nav-open-icon {
      display: none;
    }

    .nav-toggle.open .nav-close-icon {
      display: block;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 6px;
      font-size: 13px;
      color: var(--muted);
      margin-bottom: 22px;
    }

    .breadcrumb a {
      color: var(--muted);
    }

    .breadcrumb a:hover {
      color: var(--primary);
    }

    .crumb-sep {
      margin: 0 4px;
      color: var(--faint);
    }

    .breadcrumb-current {
      color: #B9C7D7;
    }

    .meta-badge {
      display: inline-flex;
      align-items: center;
      padding: 5px 12px;
      border-radius: 6px;
      border: 1px solid rgba(0, 245, 160, 0.34);
      background: rgba(0, 245, 160, 0.08);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .04em;
    }

    .hero-title {
      max-width: 860px;
      margin: 16px 0 18px;
      font-size: clamp(30px, 4vw, 46px);
      line-height: 1.25;
      font-weight: 800;
      color: #FFFFFF;
      letter-spacing: .01em;
      text-wrap: balance;
    }

    .hero-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px 20px;
      color: var(--muted);
      font-size: 14px;
    }

    .hero-meta time {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      font-variant-numeric: tabular-nums;
    }

    .hero-source {
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }

    .hero-meta-dot {
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 8px var(--primary);
    }

    .article-section {
      padding: 66px 0 56px;
    }

    .article-container {
      max-width: 780px;
      margin: 0 auto;
    }

    .article-content {
      font-size: 17px;
      line-height: 1.9;
      color: #DCE7F2;
      word-break: break-word;
    }

    .article-content > * + * {
      margin-top: 1.2em;
    }

    .article-content p {
      margin-bottom: 1.4em;
    }

    .article-content strong {
      color: #FFFFFF;
      font-weight: 700;
    }

    .article-content h2 {
      margin-top: 1.9em;
      margin-bottom: .65em;
      font-size: 24px;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.4;
      padding-left: 16px;
      border-left: 3px solid var(--primary);
      box-shadow: -1px 0 0 rgba(0, 245, 160, 0.2);
      scroll-margin-top: 100px;
    }

    .article-content h3 {
      margin-top: 1.6em;
      margin-bottom: .5em;
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      line-height: 1.4;
    }

    .article-content a {
      color: var(--primary);
      text-decoration: underline;
      text-decoration-thickness: 1px;
      text-underline-offset: 3px;
      text-decoration-color: rgba(0, 245, 160, 0.4);
    }

    .article-content a:hover {
      text-decoration-color: var(--primary);
      text-shadow: 0 0 14px rgba(0, 245, 160, 0.2);
    }

    .article-content ul,
    .article-content ol {
      padding-left: 1.3em;
      margin-bottom: 1.3em;
    }

    .article-content li {
      margin: 0.5em 0;
    }

    .article-content ul li::marker {
      color: var(--primary);
    }

    .article-content ol li::marker {
      color: var(--accent);
      font-weight: 700;
    }

    .article-content blockquote {
      margin: 1.8em 0;
      padding: 18px 22px;
      border-left: 3px solid rgba(0, 245, 160, 0.6);
      background: rgba(0, 245, 160, 0.05);
      border-radius: 0 12px 12px 0;
      color: #AFC4D8;
      line-height: 1.85;
    }

    .article-content blockquote p {
      margin: 0;
    }

    .article-content img {
      margin: 24px 0;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      object-fit: cover;
      height: auto;
    }

    .article-content video,
    .article-content iframe {
      max-width: 100%;
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
    }

    .article-content table {
      width: 100%;
      margin: 1.6em 0;
      border-collapse: separate;
      border-spacing: 0;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      font-size: 15px;
      line-height: 1.7;
    }

    .article-content th {
      background: rgba(255, 255, 255, 0.06);
      color: #FFFFFF;
      font-weight: 700;
      text-align: left;
      padding: 13px 16px;
    }

    .article-content td {
      padding: 13px 16px;
      border-top: 1px solid var(--border);
      background: rgba(255, 255, 255, 0.016);
      font-variant-numeric: tabular-nums;
    }

    .article-content hr {
      margin: 3rem 0;
      border: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 245, 160, 0.22), rgba(255, 197, 61, 0.14), transparent);
    }

    .article-foot {
      margin-top: 48px;
      padding-top: 30px;
      border-top: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      flex-wrap: wrap;
    }

    .back-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--muted);
      font-size: 14px;
    }

    .back-link:hover {
      color: var(--primary);
    }

    .section-panel {
      background: rgba(21, 30, 43, 0.6);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
    }

    .install-panel {
      padding: 64px 0 76px;
    }

    .panel-card {
      background: linear-gradient(180deg, rgba(25, 39, 52, 0.86), rgba(21, 30, 43, 0.9));
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 26px;
      transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
    }

    .panel-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 245, 160, 0.3);
      box-shadow: 0 0 0 1px rgba(0, 245, 160, 0.14), 0 20px 40px -20px rgba(0, 0, 0, 0.7), 0 16px 36px -20px rgba(0, 245, 160, 0.28);
    }

    .panel-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 46px;
      height: 46px;
      border-radius: 12px;
      margin-bottom: 16px;
      color: var(--primary);
      background: rgba(0, 245, 160, 0.09);
      border: 1px solid rgba(0, 245, 160, 0.28);
    }

    .panel-icon.is-accent {
      color: var(--accent);
      background: rgba(255, 197, 61, 0.1);
      border-color: rgba(255, 197, 61, 0.28);
    }

    .section-title-wrap {
      margin-bottom: 36px;
      max-width: 680px;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .12em;
      margin-bottom: 12px;
    }

    .section-kicker::before {
      content: "";
      width: 24px;
      height: 1px;
      background: var(--primary);
      box-shadow: 0 0 8px rgba(0, 245, 160, 0.5);
    }

    .section-title {
      margin: 0;
      font-size: clamp(24px, 3vw, 32px);
      line-height: 1.35;
      color: #FFFFFF;
      font-weight: 800;
      letter-spacing: .01em;
    }

    .section-sub {
      margin: 12px 0 0;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .faq-grid {
      display: grid;
      gap: 16px;
    }

    .faq-item {
      background: rgba(21, 30, 43, 0.86);
      border: 1px solid var(--border);
      border-left: 3px solid rgba(0, 245, 160, 0.35);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }

    .faq-item:hover {
      border-left-color: var(--primary);
      border-color: rgba(0, 245, 160, 0.18);
      background: rgba(25, 39, 52, 0.9);
      box-shadow: 0 16px 34px -24px rgba(0, 245, 160, 0.22);
    }

    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      list-style: none;
      cursor: pointer;
      padding: 19px 20px;
      font-size: 15px;
      font-weight: 700;
      color: #EDF3FA;
      min-height: 58px;
      user-select: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "+";
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      flex: 0 0 28px;
      border-radius: 8px;
      font-size: 18px;
      font-weight: 400;
      color: var(--primary);
      border: 1px solid rgba(0, 245, 160, 0.3);
      transition: transform .2s ease, background .2s ease;
    }

    .faq-item[open] summary::after {
      transform: rotate(45deg);
      background: rgba(0, 245, 160, 0.13);
    }

    .faq-item .faq-answer {
      padding: 0 20px 20px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.9;
    }

    .faq-item .faq-answer strong {
      color: #E4EBF3;
    }

    .cta-strip {
      position: relative;
      padding: 28px 0 22px;
      background: rgba(12, 17, 26, 0.4);
    }

    .cta-panel {
      position: relative;
      border: 1px solid rgba(0, 245, 160, 0.5);
      background:
        linear-gradient(135deg, rgba(0, 245, 160, 0.09), transparent 42%),
        rgba(21, 30, 43, 0.75);
      border-radius: var(--radius-lg);
      padding: 38px 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      flex-wrap: wrap;
      overflow: hidden;
      box-shadow: 0 0 0 1px rgba(0, 245, 160, 0.06), 0 24px 60px -28px rgba(0, 245, 160, 0.4);
    }

    .cta-panel::before {
      content: "";
      position: absolute;
      top: -60%;
      right: -12%;
      width: 340px;
      height: 340px;
      background: radial-gradient(circle, rgba(0, 245, 160, 0.16), transparent 68%);
      pointer-events: none;
    }

    .cta-title {
      margin: 0;
      font-size: clamp(21px, 2.8vw, 30px);
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.4;
    }

    .cta-text {
      margin: 10px 0 0;
      color: var(--muted);
      font-size: 15px;
      max-width: 620px;
    }

    .cta-btn-row {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      position: relative;
      z-index: 1;
    }

    .notfound-section {
      padding: 88px 0;
    }

    .notfound-panel {
      max-width: 680px;
      margin: 0 auto;
      text-align: center;
      background: rgba(21, 30, 43, 0.72);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 48px 32px;
    }

    .notfound-badge {
      display: inline-block;
      padding: 6px 14px;
      border-radius: 6px;
      border: 1px solid rgba(0, 245, 160, 0.4);
      color: var(--primary);
      font-size: 13px;
      background: rgba(0, 245, 160, 0.08);
      margin-bottom: 18px;
    }

    .notfound-panel h1 {
      margin: 0 0 12px;
      font-size: 30px;
      color: #FFFFFF;
    }

    .notfound-panel p {
      margin-bottom: 22px;
      color: var(--muted);
    }

    .site-footer {
      background: #070B12;
      border-top: 0;
      position: relative;
    }

    .site-footer::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 245, 160, 0.7), rgba(255, 197, 61, 0.4), transparent);
    }

    .site-footer .container {
      padding-top: 52px;
      padding-bottom: 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.3fr;
      gap: 40px 32px;
    }

    .footer-brand .brand-logo {
      margin-bottom: 16px;
    }

    .footer-brand > p {
      margin: 4px 0 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.8;
      max-width: 280px;
    }

    .footer-title {
      margin-bottom: 18px;
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
    }

    .footer-nav {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-nav a {
      color: var(--muted);
      font-size: 14px;
    }

    .footer-nav a:hover {
      color: var(--primary);
    }

    .footer-info-list {
      margin: 0;
      padding: 0;
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      color: var(--muted);
      font-size: 14px;
    }

    .footer-info-list li {
      padding-left: 16px;
      position: relative;
    }

    .footer-info-list li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0.72em;
      width: 5px;
      height: 5px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 8px rgba(0, 245, 160, 0.5);
    }

    .footer-copy {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      flex-wrap: wrap;
      margin-top: 44px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--faint);
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
      }

      .footer-brand > p {
        max-width: none;
      }
    }

    @media (max-width: 920px) {
      .nav-toggle {
        display: inline-flex;
      }

      .main-nav {
        display: none;
        position: fixed;
        top: 72px;
        left: 16px;
        right: 16px;
        z-index: 100;
        background: rgba(10, 15, 23, 0.98);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-card);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px;
        max-height: calc(100vh - 90px);
        overflow-y: auto;
      }

      .main-nav.open {
        display: flex;
      }

      .main-nav a {
        min-height: 44px;
        display: flex;
        align-items: center;
        padding: 0 12px;
        border-radius: 8px;
        color: #B2C2D4;
      }

      .main-nav a.active {
        background: rgba(0, 245, 160, 0.08);
        color: var(--primary);
      }

      .main-nav a.active::after {
        display: none;
      }

      .header-actions .hide-mobile {
        display: none;
      }

      .section {
        padding: 60px 0;
      }

      .page-hero {
        padding: 56px 0 46px;
      }
    }

    @media (max-width: 640px) {
      .section {
        padding: 46px 0;
      }

      .page-hero {
        padding: 46px 0 40px;
      }

      .hero-title {
        font-size: 26px;
      }

      .article-content {
        font-size: 16px;
      }

      .article-content h2 {
        font-size: 21px;
      }

      .article-content h3 {
        font-size: 18px;
      }

      .cta-panel {
        padding: 28px 20px;
      }

      .panel-card {
        padding: 22px 18px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }

      .header-inner {
        min-height: 64px;
      }

      .brand-text strong {
        font-size: 15px;
      }

      .brand-text > span {
        font-size: 10px;
      }

      .brand-mark {
        width: 32px;
        height: 32px;
      }

      .header-actions .btn {
        padding: 0 12px;
        font-size: 13px;
        min-height: 38px;
      }

      .nav-toggle {
        width: 38px;
        height: 38px;
      }
    }

    @media (max-width: 380px) {
      .hero-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
    }

/* roulang page: category3 */
:root {
            --bg: #0C111A;
            --panel: #151E2B;
            --panel2: #192734;
            --neon: #00F5A0;
            --amber: #FFC53D;
            --danger: #FF5D5D;
            --txt: #E6EDF5;
            --sub: #92A6BA;
            --place: #5C7388;
            --line: rgba(255, 255, 255, 0.08);
            --glow: rgba(0, 245, 160, 0.45);
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
            --neon-shadow: 0 0 0 1px rgba(0, 245, 160, 0.2), 0 0 20px -4px rgba(0, 245, 160, 0.45);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--txt);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            font-variant-numeric: tabular-nums;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            background: none;
            border: none;
            font-family: inherit;
            cursor: pointer;
        }
        input {
            font-family: inherit;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 32px;
        }
        section {
            scroll-margin-top: 90px;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .section {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .section-sub {
            color: var(--sub);
            font-size: 15px;
            max-width: 680px;
        }
        .sec-head {
            margin-bottom: 48px;
            max-width: 800px;
        }
        .sec-head .sec-en {
            font-size: 13px;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--neon);
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
        }
        .sec-head .sec-en::before {
            content: "";
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--neon);
            box-shadow: 0 0 6px var(--neon);
        }
        .sec-head h2 {
            font-size: clamp(28px, 3vw, 36px);
            font-weight: 800;
            margin: 8px 0 12px;
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .section-sub {
            color: var(--sub);
            font-size: 15px;
            line-height: 1.7;
        }
        .card {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: 16px;
            transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
        }
        .card:hover {
            transform: translateY(-3px);
            border-color: rgba(0, 245, 160, 0.35);
            box-shadow: 0 0 0 1px rgba(0, 245, 160, 0.15), 0 8px 30px -8px rgba(0, 245, 160, 0.2);
        }
        .btn-main {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--neon);
            color: #0A0F16;
            font-weight: 700;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: 8px;
            border: 1px solid transparent;
            transition: all .22s ease;
            gap: 8px;
            white-space: nowrap;
        }
        .btn-main:hover {
            background: #33f8b3;
            box-shadow: 0 0 22px -4px rgba(0, 245, 160, 0.7), 0 4px 20px -4px rgba(0, 245, 160, 0.4);
            transform: translateY(-1px);
        }
        .btn-main:active {
            transform: translateY(0);
            box-shadow: 0 0 10px -2px rgba(0, 245, 160, 0.5);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--txt);
            border: 1px solid rgba(255, 255, 255, 0.22);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border-radius: 8px;
            transition: all .22s ease;
            gap: 8px;
            white-space: nowrap;
        }
        .btn-ghost:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 18px -6px rgba(0, 245, 160, 0.6);
        }
        .btn-ghost:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }
        .badge {
            display: inline-block;
            padding: 2px 10px;
            font-size: 12px;
            border-radius: 4px;
            border: 1px solid rgba(0, 245, 160, 0.35);
            color: var(--neon);
            background: rgba(0, 245, 160, 0.06);
            font-weight: 500;
            white-space: nowrap;
        }
        .badge-amber {
            border-color: rgba(255, 197, 61, 0.3);
            color: var(--amber);
            background: rgba(255, 197, 61, 0.07);
        }
        .badge-gray {
            border-color: rgba(255, 255, 255, 0.15);
            color: var(--sub);
            background: rgba(255, 255, 255, 0.04);
        }
        .icon-wrap {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(0, 245, 160, 0.1);
            color: var(--neon);
            flex-shrink: 0;
        }
        .tab-num {
            font-variant-numeric: tabular-nums;
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 3px;
            border-radius: 4px;
        }
        /* header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(12, 17, 26, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 245, 160, 0.25);
            box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 20px;
            flex-wrap: wrap;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .brand-mark {
            display: flex;
            width: 36px;
            height: 36px;
            align-items: center;
            justify-content: center;
            background: rgba(0, 245, 160, 0.12);
            border: 1px solid rgba(0, 245, 160, 0.3);
            color: var(--neon);
            border-radius: 8px;
            box-shadow: 0 0 12px -4px rgba(0, 245, 160, 0.3);
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.1;
        }
        .brand-text strong {
            font-size: 18px;
            font-weight: 800;
            color: var(--txt);
            letter-spacing: 0.01em;
        }
        .brand-text span {
            font-size: 12px;
            color: var(--neon);
            letter-spacing: 0.06em;
            margin-top: 2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .main-nav a {
            display: inline-flex;
            align-items: center;
            min-height: 68px;
            font-size: 15px;
            font-weight: 500;
            color: var(--sub);
            position: relative;
            padding: 0 2px;
            transition: color .2s;
        }
        .main-nav a:hover {
            color: var(--txt);
        }
        .main-nav a.active {
            color: var(--neon);
            text-shadow: 0 0 12px rgba(0, 245, 160, 0.4);
        }
        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 2px;
            background: var(--neon);
            box-shadow: 0 0 8px var(--neon);
            border-radius: 2px 2px 0 0;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: var(--neon);
            color: #0A0F16;
            font-weight: 700;
            padding: 9px 20px;
            border-radius: 8px;
            font-size: 14px;
            transition: all .2s;
            border: 1px solid var(--neon);
        }
        .btn-login:hover {
            background: transparent;
            color: var(--neon);
            box-shadow: 0 0 16px -4px rgba(0, 245, 160, 0.7);
        }
        .btn-download-header {
            background: rgba(255, 197, 61, 0.12);
            border: 1px solid rgba(255, 197, 61, 0.3);
            color: var(--amber);
            font-weight: 700;
            padding: 9px 18px;
            border-radius: 8px;
            font-size: 14px;
            transition: all .2s;
        }
        .btn-download-header:hover {
            background: var(--amber);
            color: #0A0F16;
            box-shadow: 0 0 18px -4px rgba(255, 197, 61, 0.6);
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--line);
            border-radius: 8px;
            color: var(--txt);
            align-items: center;
            justify-content: center;
            background: var(--panel);
        }
        .mobile-nav {
            display: none;
            padding: 12px 20px 18px;
            background: #0f151f;
            border-top: 1px solid var(--line);
        }
        .mobile-nav a {
            display: block;
            padding: 13px 8px;
            color: var(--txt);
            font-size: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            min-height: 44px;
            display: flex;
            align-items: center;
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .mobile-nav a.active {
            color: var(--neon);
        }
        .hero-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 18px;
        }
        /* ===== page hero ===== */
        .category-top {
            position: relative;
            background-color: var(--bg);
            background-image: linear-gradient(180deg, rgba(0, 0, 0, 0.1) 0%, rgba(12, 17, 26, 0.9) 100%),
                url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--line);
            padding: 62px 0 52px;
        }
        .category-top::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 245, 160, 0.5), transparent);
        }
        .crumbs {
            font-size: 13px;
            color: var(--place);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
            margin-bottom: 18px;
        }
        .crumbs a:hover {
            color: var(--neon);
        }
        .crumbs span {
            color: var(--place);
        }
        .category-top h1 {
            font-size: clamp(30px, 4vw, 44px);
            font-weight: 800;
            color: var(--txt);
            line-height: 1.2;
            max-width: 900px;
            margin: 10px 0 16px;
        }
        .category-top h1 .highlight {
            color: var(--neon);
            text-shadow: 0 0 24px rgba(0, 245, 160, 0.3);
        }
        .category-top p {
            color: var(--sub);
            font-size: 16px;
            max-width: 850px;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .guide-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .status-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 245, 160, 0.08);
            border: 1px solid rgba(0, 245, 160, 0.2);
            color: var(--neon);
            padding: 6px 14px;
            border-radius: 100px;
            font-size: 13px;
        }
        .status-pill::before {
            content: "";
            display: inline-block;
            width: 6px;
            height: 6px;
            background: var(--neon);
            border-radius: 50%;
            box-shadow: 0 0 6px var(--neon);
        }
        /* ===== 卡片网格 ===== */
        .help-grid-1 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .help-card {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 26px;
            display: flex;
            flex-direction: column;
            transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
        }
        .help-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 245, 160, 0.3);
            box-shadow: 0 0 0 1px rgba(0, 245, 160, 0.12), 0 14px 30px -12px rgba(0, 245, 160, 0.2);
        }
        .help-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 245, 160, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            color: var(--neon);
        }
        .help-card.amber .card-icon {
            background: rgba(255, 197, 61, 0.12);
            color: var(--amber);
        }
        .help-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .help-card p {
            color: var(--sub);
            font-size: 14px;
            line-height: 1.75;
            flex: 1;
        }
        .card-link {
            margin-top: 16px;
            color: var(--neon);
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s;
        }
        .card-link:hover {
            gap: 10px;
        }
        /* ===== 数据工具集 ===== */
        .tool-panel {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: 16px;
            background-image: radial-gradient(circle at 15% 10%, rgba(0, 245, 160, 0.03), transparent 30%);
        }
        .tool-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            align-items: stretch;
        }
        .tool-info {
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .tool-info h3 {
            font-size: 21px;
            font-weight: 700;
            margin: 16px 0 10px;
            line-height: 1.3;
        }
        .tool-info p {
            color: var(--sub);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .tool-points {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 16px;
        }
        .tool-points li {
            font-size: 13px;
            color: var(--txt);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--line);
            border-radius: 6px;
            padding: 3px 10px;
        }
        .tool-visual {
            min-height: 210px;
            background: var(--panel2);
            border-radius: 0 16px 16px 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 24px 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 24px;
            position: relative;
        }
        .tool-visual-img {
            width: 100%;
            height: 100%;
            min-height: 220px;
            object-fit: cover;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        /* ===== 流程 3 steps ===== */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .flow-step {
            position: relative;
            background: var(--panel2);
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 30px 24px 24px;
            min-height: 180px;
            overflow: hidden;
        }
        .flow-step::before {
            content: "";
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 2px;
            background: linear-gradient(90deg, var(--neon), transparent 70%);
            opacity: 0.4;
        }
        .flow-step .step-num {
            font-size: 38px;
            font-weight: 800;
            color: rgba(0, 245, 160, 0.25);
            line-height: 1;
            margin-bottom: 12px;
            font-variant-numeric: tabular-nums;
        }
        .flow-step h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .flow-step p {
            color: var(--sub);
            font-size: 14px;
            line-height: 1.7;
        }
        /* ===== 折叠区 ===== */
        .faq {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: 10px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .25s;
        }
        .faq-item[open] {
            border-color: rgba(0, 245, 160, 0.3);
        }
        .faq-item summary {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 18px;
            list-style: none;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            color: var(--txt);
            font-size: 16px;
            min-height: 56px;
            transition: background .2s;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-item .acc-icon {
            color: var(--neon);
            font-size: 20px;
            font-weight: 400;
            width: 24px;
            text-align: center;
            flex-shrink: 0;
            transition: transform .25s;
        }
        .faq-item[open] .acc-icon {
            transform: rotate(45deg);
        }
        .faq-body {
            padding: 0 22px 24px;
            color: var(--sub);
            font-size: 15px;
            line-height: 1.9;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 16px;
            margin-top: 0;
        }
        /* ===== CTA ===== */
        .cta-block {
            background: var(--panel2);
            border: 1px solid rgba(0, 245, 160, 0.18);
            border-radius: 16px;
            background-image: radial-gradient(ellipse at 80% 20%, rgba(0, 245, 160, 0.12), transparent 60%),
                radial-gradient(ellipse at 10% 90%, rgba(255, 197, 61, 0.08), transparent 50%);
            padding: 48px 30px;
            text-align: center;
            position: relative;
        }
        .cta-block::before {
            content: "";
            position: absolute;
            top: 0;
            left: 30px;
            right: 30px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 245, 160, 0.7), transparent);
        }
        .cta-block h2 {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-block p {
            color: var(--sub);
            max-width: 570px;
            margin: 0 auto 28px;
            font-size: 16px;
            line-height: 1.8;
        }
        .cta-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            align-items: center;
        }
        .cta-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 18px;
            margin-top: 26px;
            font-size: 13px;
            color: var(--place);
        }
        .cta-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .cta-meta span::before {
            content: "";
            width: 4px;
            height: 4px;
            background: var(--neon);
            border-radius: 50%;
            display: inline-block;
        }
        /* ===== footer ===== */
        .site-footer {
            background-color: #090D13;
            border-top: 1px solid rgba(0, 245, 160, 0.15);
            padding-top: 50px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.1fr;
            gap: 36px;
            padding-bottom: 36px;
        }
        .footer-brand .brand-logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--sub);
            font-size: 14px;
            line-height: 1.8;
            max-width: 300px;
        }
        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--txt);
            letter-spacing: 0.02em;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--neon);
        }
        .footer-title {
            color: var(--txt);
        }
        .footer-nav {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-nav a {
            color: var(--sub);
            font-size: 14px;
            transition: color .2s;
        }
        .footer-nav a:hover {
            color: var(--neon);
        }
        .footer-info-list {
            color: var(--sub);
            font-size: 14px;
            line-height: 1.8;
            display: grid;
            gap: 8px;
        }
        .footer-copy {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            color: var(--place);
            font-size: 13px;
            flex-wrap: wrap;
        }
        /* ===== 场景 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 18px;
        }
        .scene-item {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 22px 20px;
            transition: transform .2s, border-color .2s;
        }
        .scene-item:hover {
            border-color: rgba(0, 245, 160, 0.3);
            transform: translateY(-3px);
        }
        .scene-item .scene-dot {
            color: var(--amber);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        .scene-item .scene-index {
            font-size: 12px;
            color: var(--neon);
            letter-spacing: 0.08em;
            margin-bottom: 10px;
            font-weight: 600;
        }
        .scene-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .scene-item p {
            color: var(--sub);
            font-size: 14px;
            line-height: 1.7;
        }
        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .help-grid-1 {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: 1fr 1fr;
            }
            .header-inner {
                flex-wrap: wrap;
                min-height: 64px;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
            .main-nav,
            .header-actions {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .mobile-nav {
                display: grid;
                gap: 0;
            }
            .mobile-nav a {
                display: flex;
            }
            .tool-row {
                grid-template-columns: 1fr;
            }
            .tool-visual {
                border-radius: 0 0 16px 16px;
                min-height: 180px;
            }
            .flow-grid {
                grid-template-columns: 1fr;
            }
            .help-grid-1 {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding-top: 56px;
                padding-bottom: 56px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-copy {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .btn-main,
            .btn-ghost {
                font-size: 14px;
                padding: 10px 16px;
            }
            .category-top {
                padding: 44px 0;
            }
            .category-top p {
                font-size: 15px;
            }
            .header-inner {
                padding-top: 6px;
                padding-bottom: 6px;
            }
            .brand-text strong {
                font-size: 16px;
            }
        }
        @media (min-width: 769px) {
            .mobile-nav {
                display: none !important;
            }
        }
        @media print {
            .site-header,
            .site-footer,
            .cta-block,
            .guide-actions {
                display: none !important;
            }
        }

/* roulang page: category2 */
:root{
    --bg:#0C111A;
    --card:#151E2B;
    --card-2:#192734;
    --mint:#00F5A0;
    --amber:#FFC53D;
    --danger:#FF5D5D;
    --text:#E6EDF5;
    --muted:#92A6BA;
    --faint:#5C7388;
    --line:rgba(255,255,255,0.08);
    --radius-lg:16px;
    --radius-md:10px;
    --radius-sm:8px;
    --container:1200px;
    --mint-glow:0 0 0 1px rgba(0,245,160,0.2),0 0 22px -4px rgba(0,245,160,0.45);
  }

  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--text);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    font-size:16px;
  }
  body,button,input,select,textarea{
    font-family:inherit;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  ul,ol{list-style:none;}
  button{background:none;border:none;color:inherit;cursor:pointer;}
  .container{
    width:100%;
    max-width:var(--container);
    margin-left:auto;
    margin-right:auto;
    padding-left:32px;
    padding-right:32px;
  }
  .section{padding-top:84px;padding-bottom:84px;scroll-margin-top:90px;}
  .section-sm{padding-top:48px;padding-bottom:48px;}

  .section-head{
    display:flex;
    flex-direction:column;
    gap:8px;
    margin-bottom:44px;
    max-width:720px;
  }
  .section-eyebrow{
    color:var(--mint);
    font-size:13px;
    letter-spacing:.16em;
    font-weight:800;
    text-transform:uppercase;
    display:flex;
    align-items:center;
    gap:10px;
  }
  .section-eyebrow::before{
    content:"";
    width:26px;height:2px;
    background:linear-gradient(90deg,var(--mint),transparent);
    border-radius:99px;
  }
  .section-title{
    font-size:30px;
    line-height:1.3;
    font-weight:800;
    letter-spacing:-.01em;
  }
  .section-desc{
    color:var(--muted);
    font-size:15px;
    max-width:620px;
  }

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    border-radius:var(--radius-sm);
    font-weight:700;
    font-size:15px;
    line-height:1;
    padding:13px 22px;
    transition:all .22s ease;
    border:1px solid transparent;
    white-space:nowrap;
  }
  .btn-primary{
    background:var(--mint);
    color:#08110C;
    border-color:var(--mint);
  }
  .btn-primary:hover{
    transform:translateY(-2px);
    box-shadow:0 0 0 1px rgba(0,245,160,.18),0 0 24px -2px rgba(0,245,160,.56);
  }
  .btn-ghost{
    background:rgba(255,255,255,.02);
    color:var(--text);
    border-color:rgba(255,255,255,.18);
  }
  .btn-ghost:hover{
    color:var(--mint);
    border-color:var(--mint);
    box-shadow:0 0 18px -6px rgba(0,245,160,.5);
  }
  .btn-amber{
    background:var(--amber);
    color:#181308;
    border-color:var(--amber);
  }
  .btn-amber:hover{
    transform:translateY(-2px);
    box-shadow:0 0 0 1px rgba(255,197,61,.2),0 0 24px -4px rgba(255,197,61,.58);
  }
  .btn-lg{padding:15px 28px;font-size:16px;}
  .btn-sm{padding:9px 15px;font-size:14px;border-radius:6px;}
  .btn:focus-visible,a:focus-visible,button:focus-visible{
    outline:2px solid var(--mint);
    outline-offset:3px;
    border-radius:4px;
  }

  /* ===== header ===== */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(12,17,26,.88);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    box-shadow:0 1px 0 rgba(0,245,160,.04),0 12px 40px -18px rgba(0,0,0,.65);
  }
  .site-header::after{
    content:"";
    display:block;
    height:1px;
    background:linear-gradient(90deg,transparent,rgba(0,245,160,.62),transparent);
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:68px;
    gap:20px;
  }
  .brand-logo{
    display:inline-flex;
    align-items:center;
    gap:11px;
    flex-shrink:0;
  }
  .brand-mark{
    width:40px;height:40px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:10px;
    color:var(--mint);
    background:rgba(0,245,160,.08);
    border:1px solid rgba(0,245,160,.22);
  }
  .brand-text{
    display:flex;flex-direction:column;line-height:1.1;
  }
  .brand-text strong{
    font-size:17px;
    font-weight:800;
    letter-spacing:.02em;
    color:var(--text);
  }
  .brand-text span{
    font-size:12px;
    color:var(--mint);
    font-weight:700;
    letter-spacing:.08em;
  }
  .main-nav{
    display:flex;
    align-items:center;
    gap:5px;
  }
  .main-nav a{
    position:relative;
    display:inline-block;
    padding:10px 14px;
    margin:0 2px;
    color:#C9D6E3;
    font-size:15px;
    font-weight:600;
    border-radius:7px;
    transition:color .2s ease,background .2s ease;
  }
  .main-nav a:hover{
    color:var(--text);
    background:rgba(255,255,255,.04);
  }
  .main-nav a.active{
    color:var(--mint);
    font-weight:800;
    text-shadow:0 0 14px rgba(0,245,160,.45);
  }
  .main-nav a.active::after{
    content:"";
    position:absolute;
    left:16px;
    right:16px;
    bottom:2px;
    height:2px;
    border-radius:99px;
    background:linear-gradient(90deg,var(--mint),rgba(0,245,160,.05));
    box-shadow:0 0 12px rgba(0,245,160,.85);
  }
  .header-actions{
    display:flex;
    align-items:center;
    gap:10px;
  }
  .nav-toggle{
    display:none;
    width:42px;height:42px;
    border-radius:9px;
    align-items:center;
    justify-content:center;
    border:1px solid rgba(255,255,255,.14);
    color:var(--text);
  }
  .nav-toggle i{font-size:19px;}

  /* page hero */
  .page-hero{
    position:relative;
    padding-top:76px;
    padding-bottom:76px;
    background:linear-gradient(115deg,rgba(8,12,18,.93) 0%,rgba(10,16,24,.84) 46%,rgba(4,10,14,.74) 100%);
    background-size:cover;
    background-position:center;
    border-bottom:1px solid rgba(255,255,255,.06);
    overflow:hidden;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:0;
    height:1px;
    background:linear-gradient(90deg,transparent 4%,rgba(0,245,160,.7) 48%,transparent 96%);
  }
  .hero-inner{position:relative;z-index:2;}
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:9px;
    font-size:13px;
    color:var(--muted);
    margin-bottom:20px;
    flex-wrap:wrap;
  }
  .breadcrumb a{color:var(--muted);transition:color .2s;}
  .breadcrumb a:hover{color:var(--mint);}
  .breadcrumb .sep{color:var(--faint);}
  .breadcrumb .current{color:#C4D3E1;}
  .hero-tag{
    display:inline-flex;
    align-items:center;
    gap:6px;
    border:1px solid rgba(0,245,160,.26);
    background:rgba(0,245,160,.07);
    color:var(--mint);
    font-size:13px;
    font-weight:700;
    padding:7px 13px;
    border-radius:999px;
    margin-bottom:16px;
  }
  .page-hero h1{
    font-size:46px;
    line-height:1.18;
    font-weight:800;
    letter-spacing:-.02em;
    max-width:820px;
    margin-bottom:14px;
  }
  .page-hero h1 em{
    font-style:normal;
    color:var(--mint);
    text-shadow:0 0 24px rgba(0,245,160,.24);
  }
  .hero-desc{
    font-size:16px;
    color:#BAC7D6;
    max-width:650px;
    line-height:1.9;
  }
  .hero-actions{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:12px;
    margin-top:28px;
  }
  .hero-note{
    display:flex;
    gap:8px;
    align-items:center;
    color:var(--faint);
    font-size:14px;
  }
  .hero-hint{
    margin-top:22px;
    display:flex;
    align-items:center;
    gap:14px;
    flex-wrap:wrap;
  }
  .hero-hint .tag-pill{
    display:inline-flex;
    align-items:center;
    gap:6px;
    color:#D5E0EB;
    font-size:14px;
    background:rgba(255,255,255,.05);
    border:1px solid rgba(255,255,255,.08);
    padding:6px 12px;
    border-radius:99px;
  }
  .hero-hint .tag-pill i{color:var(--amber);font-size:13px;}

  /* card shell */
  .board-card,.feature-card,.stat-card,.cta-panel{
    background:linear-gradient(150deg,rgba(21,30,43,.96),rgba(17,24,36,.94));
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:0 10px 34px -24px rgba(0,0,0,.8);
  }

  /* data table */
  .data-toolbar{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:14px;
    flex-wrap:wrap;
    margin-bottom:22px;
  }
  .data-tabs{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
  }
  .data-tab{
    padding:8px 14px;
    border-radius:8px;
    font-size:14px;
    color:var(--muted);
    border:1px solid rgba(255,255,255,.1);
    transition:all .2s;
  }
  .data-tab:hover{color:var(--text);border-color:rgba(255,255,255,.2);}
  .data-tab.active{
    color:#0A140F;
    background:var(--mint);
    font-weight:700;
    border-color:var(--mint);
    box-shadow:0 0 18px -8px rgba(0,245,160,.85);
  }
  .data-update{
    color:var(--muted);
    font-size:14px;
    display:inline-flex;
    gap:8px;
    align-items:center;
  }
  .data-update .dot{
    width:8px;height:8px;border-radius:99px;
    background:var(--mint);
    box-shadow:0 0 10px rgba(0,245,160,.75);
  }
  .board-row{
    display:grid;
    grid-template-columns:160px 1fr 1fr 1fr;
    gap:14px;
    align-items:center;
    padding:16px 4px;
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .board-row:last-child{border-bottom:none;}
  .board-category{
    display:flex;
    flex-direction:column;
  }
  .board-category strong{
    font-size:16px;
    font-weight:800;
  }
  .board-category span{
    color:var(--faint);
    font-size:13px;
  }
  .ball-row{
    display:flex;
    flex-wrap:wrap;
    gap:6px;
  }
  .ball{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:32px;height:32px;
    border-radius:50%;
    background:rgba(255,255,255,.05);
    color:var(--text);
    font-weight:800;
    font-size:15px;
    border:1px solid rgba(255,255,255,.15);
    font-variant-numeric:tabular-nums;
  }
  .ball.ball-primary{
    color:#0D1511;
    background:var(--mint);
    border-color:var(--mint);
    box-shadow:0 0 14px -2px rgba(0,245,160,.55);
  }
  .ball.ball-amber{
    color:#171204;
    background:var(--amber);
    border-color:var(--amber);
  }
  .status-ok{
    color:var(--mint);
    font-weight:700;
    display:inline-flex;
    gap:6px;
    align-items:center;
    font-size:14px;
  }
  .status-wait{
    color:var(--amber);
    font-weight:700;
    display:inline-flex;
    gap:6px;
    align-items:center;
    font-size:14px;
  }
  .board-note{
    margin-top:14px;
    color:var(--faint);
    font-size:13px;
    letter-spacing:.02em;
  }
  .trend-link{
    font-size:15px;
    color:var(--mint);
    font-weight:700;
    justify-self:start;
    display:inline-flex;
    gap:6px;
    align-items:center;
    transition:gap .2s;
  }
  .trend-link:hover{gap:10px;}
  @media(max-width:860px){
    .board-row{grid-template-columns:1fr;}
    .board-category{flex-direction:row;align-items:baseline;gap:8px;justify-content:space-between;}
  }

  /* feature grid */
  .feature-grid{
    display:grid;
    grid-template-columns:1.1fr 1fr 1fr 1fr;
    gap:22px;
  }
  .feature-card{
    padding:26px 22px;
    transition:transform .24s ease,border-color .24s,box-shadow .24s;
    position:relative;
    overflow:hidden;
  }
  .feature-card::before{
    content:"";
    position:absolute;
    left:0;top:0;bottom:0;
    width:2px;
    background:linear-gradient(180deg,var(--mint),transparent);
    opacity:.45;
    transition:opacity .2s;
  }
  .feature-card:hover{
    transform:translateY(-3px);
    border-color:rgba(0,245,160,.28);
    box-shadow:0 0 0 1px rgba(0,245,160,.08),0 18px 32px -22px rgba(0,0,0,.88),0 0 26px -10px rgba(0,245,160,.16);
  }
  .feature-card:hover::before{opacity:1;}
  .feature-icon{
    width:46px;height:46px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:12px;
    font-size:20px;
    color:var(--mint);
    background:rgba(0,245,160,.07);
    border:1px solid rgba(0,245,160,.16);
    margin-bottom:16px;
  }
  .feature-card h3{
    font-size:18px;
    font-weight:800;
    margin-bottom:7px;
    line-height:1.35;
  }
  .feature-card p{
    color:var(--muted);
    font-size:14px;
    line-height:1.85;
  }
  .feature-more{
    display:inline-flex;
    margin-top:14px;
    color:var(--mint);
    font-weight:700;
    font-size:14px;
    gap:6px;
    align-items:center;
  }
  .feature-more i{transition:transform .2s;}
  .feature-more:hover i{transform:translateX(4px);}

  /* data trend split */
  .trend-wrap{
    display:grid;
    grid-template-columns:.9fr 1.1fr;
    gap:24px;
    align-items:stretch;
  }
  .visual-box{
    border-radius:var(--radius-lg);
    overflow:hidden;
    position:relative;
    min-height:360px;
    border:1px solid var(--line);
    background:#111a26;
  }
  .visual-box img{
    width:100%;height:100%;
    object-fit:cover;
    position:absolute;inset:0;
  }
  .visual-mask{
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(10,15,23,.28) 0%,rgba(10,15,23,.78) 100%);
    display:flex;
    align-items:flex-end;
    padding:28px;
  }
  .visual-caption{
    color:#fff;
  }
  .visual-caption h4{
    font-size:22px;
    font-weight:800;
    margin-bottom:6px;
  }
  .visual-caption p{
    color:#C3D2E1;
    font-size:15px;
  }
  .split-cards{
    display:flex;
    flex-direction:column;
    gap:16px;
  }
  .data-metric{
    background:linear-gradient(145deg,rgba(21,30,43,.96),rgba(16,23,34,.94));
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    padding:20px;
    display:flex;
    justify-content:space-between;
    gap:16px;
    transition:border-color .2s;
  }
  .data-metric:hover{border-color:rgba(255,197,61,.35);}
  .data-metric .metric-icon{
    width:42px;height:42px;
    border-radius:11px;
    background:rgba(255,197,61,.08);
    color:var(--amber);
    border:1px solid rgba(255,197,61,.18);
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:18px;
    flex-shrink:0;
  }
  .data-metric .m-info{
    flex:1;
  }
  .data-metric h4{
    font-size:16px;
    font-weight:800;
  }
  .data-metric p{
    color:var(--muted);
    font-size:14px;
    line-height:1.7;
  }
  .metric-num{
    font-size:27px;
    font-weight:800;
    font-variant-numeric:tabular-nums;
    color:var(--amber);
    line-height:1;
    white-space:nowrap;
  }

  /* device/group CTA */
  .group-panel{
    background:linear-gradient(150deg,rgba(21,30,43,.9),rgba(15,22,33,.95));
    border-radius:var(--radius-lg);
    border:1px solid rgba(255,255,255,.1);
    padding:34px;
    display:grid;
    grid-template-columns:1.1fr .9fr;
    gap:22px;
    align-items:center;
  }
  .group-panel h3{
    font-size:25px;
    font-weight:800;
    margin-bottom:6px;
    line-height:1.3;
  }
  .group-panel p{
    color:#B9C7D5;
    font-size:15px;
    max-width:960px;
    line-height:1.9;
  }
  .mini-list{
    display:grid;
    gap:10px;
    margin-top:14px;
  }
  .mini-list li{
    color:var(--muted);
    font-size:14px;
    display:flex;
    align-items:flex-start;
    gap:9px;
  }
  .mini-list li i{
    color:var(--mint);
    margin-top:5px;
    font-size:13px;
  }
  .group-device{
    background:rgba(0,245,160,.04);
    border:1px dashed rgba(0,245,160,.24);
    border-radius:14px;
    padding:22px;
    position:relative;
  }
  .device-icon{
    width:60px;height:60px;
    display:flex;
    align-items:center;
    justify-content:center;
    background:rgba(255,255,255,.05);
    border-radius:20px;
    border:1px solid var(--line);
    color:var(--mint);
    margin-bottom:12px;
    font-size:26px;
  }
  .group-device .device-desc b{
    font-size:17px;
  }
  .group-device .device-desc span{
    color:var(--muted);
    font-size:14px;
    display:block;
    margin-top:4px;
  }

  /* faq */
  .faq-wrap{
    max-width:880px;
  }
  .faq-item{
    background:linear-gradient(145deg,rgba(21,30,43,.98),rgba(16,22,33,.98));
    border:1px solid rgba(255,255,255,.08);
    border-radius:14px;
    margin-bottom:14px;
    overflow:hidden;
    position:relative;
    transition:border-color .2s;
  }
  .faq-item::before{
    content:"";
    position:absolute;
    left:0;top:0;bottom:0;
    width:3px;
    background:linear-gradient(180deg,var(--mint),transparent);
    opacity:0;
    transition:opacity .2s;
  }
  .faq-item:hover{
    border-color:rgba(0,245,160,.22);
  }
  .faq-item:hover::before{opacity:.8;}
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    padding:20px 22px;
    font-weight:700;
    font-size:16px;
    line-height:1.5;
    transition:background .2s;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary .faq-icon{
    width:30px;height:30px;
    flex-shrink:0;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:8px;
    color:var(--mint);
    background:rgba(0,245,160,.07);
    border:1px solid rgba(0,245,160,.2);
    font-size:14px;
    transition:transform .25s ease,background .2s ease;
  }
  .faq-item[open] summary .faq-icon{
    transform:rotate(45deg);
    background:var(--mint);
    color:#09120e;
  }
  .faq-item .faq-answer{
    padding:0 22px 21px;
    color:var(--muted);
    font-size:15px;
    line-height:1.9;
  }

  /* final CTA */
  .cta-panel{
    position:relative;
    overflow:hidden;
    padding:48px 40px;
    border-radius:20px;
    border:1px solid rgba(0,245,160,.22);
    box-shadow:0 0 0 1px rgba(0,245,160,.06),0 0 35px -12px rgba(0,245,160,.16);
    background:linear-gradient(140deg,rgba(18,29,42,.97),rgba(12,20,30,.98));
  }
  .cta-panel::before{
    content:"";
    position:absolute;
    width:420px;height:420px;
    border-radius:50%;
    background:rgba(0,245,160,.09);
    filter:blur(92px);
    top:-220px;right:-80px;
    pointer-events:none;
  }
  .cta-panel::after{
    content:"";
    position:absolute;
    left:20px;right:20px;top:0;
    height:1px;
    background:linear-gradient(90deg,transparent,var(--mint),transparent);
    opacity:.8;
  }
  .cta-inner{
    position:relative;
    z-index:2;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    flex-wrap:wrap;
  }
  .cta-title{
    font-size:27px;
    font-weight:800;
    color:var(--text);
    margin-bottom:6px;
    line-height:1.3;
  }
  .cta-desc{
    color:var(--muted);
    font-size:15px;
    max-width:620px;
  }
  .cta-buttons{display:flex;gap:12px;flex-wrap:wrap;align-items:center;}
  .cta-meta{
    margin-top:18px;
    color:var(--faint);
    font-size:13px;
    display:flex;
    gap:16px;
    flex-wrap:wrap;
  }

  /* footer */
  .site-footer{
    background:#09111C;
    border-top:1px solid rgba(255,255,255,.08);
    position:relative;
    margin-top:52px;
  }
  .site-footer::before{
    content:"";
    display:block;
    height:1px;
    background:linear-gradient(90deg,transparent,rgba(0,245,160,.55),transparent);
  }
  .footer-container{max-width:1200px;margin:0 auto;padding:48px 32px 24px;}
  .footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1fr;
    gap:32px;
    margin-bottom:32px;
  }
  .footer-brand p{
    color:var(--muted);
    font-size:14px;
    margin-top:14px;
    max-width:320px;
    line-height:1.8;
  }
  .footer-title{
    color:var(--text);
    font-weight:800;
    font-size:16px;
    margin-bottom:14px;
  }
  .footer-nav{
    display:flex;
    flex-direction:column;
    gap:12px;
  }
  .footer-nav a{
    color:var(--muted);
    font-size:14px;
    transition:color .2s,padding .2s;
  }
  .footer-nav a:hover{
    color:var(--mint);
    padding-left:4px;
  }
  .footer-info-list{
    display:grid;
    gap:11px;
  }
  .footer-info-list li{
    color:var(--muted);
    font-size:14px;
    position:relative;
    padding-left:15px;
  }
  .footer-info-list li::before{
    content:"";
    position:absolute;
    left:0;top:9px;
    width:6px;height:6px;
    border-radius:50%;
    background:var(--mint);
    box-shadow:0 0 8px rgba(0,245,160,.6);
  }
  .footer-copy{
    border-top:1px solid rgba(255,255,255,.06);
    padding-top:20px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:10px;
    color:var(--faint);
    font-size:13px;
  }

  @media(max-width:1200px){
    .feature-grid{grid-template-columns:1fr 1fr;}
  }

  @media(max-width:992px){
    .nav-toggle{display:flex;}
    .main-nav{
      display:flex;
      flex-direction:column;
      align-items:stretch;
      gap:2px;
      position:absolute;
      top:calc(100% + 1px);
      left:16px;
      right:16px;
      background:rgba(13,19,28,.98);
      border:1px solid rgba(255,255,255,.1);
      border-radius:0 0 14px 14px;
      box-shadow:0 24px 42px -20px rgba(0,0,0,.86);
      padding:18px;
      transform:translateY(-8px);
      opacity:0;
      pointer-events:none;
      transition:all .24s ease;
      z-index:40;
    }
    .main-nav.open{
      transform:translateY(0);
      opacity:1;
      pointer-events:auto;
    }
    .main-nav a{
      font-size:16px;
      padding:14px 12px;
      border-radius:8px;
    }
    .main-nav a:hover{
      background:rgba(255,255,255,.05);
    }
    .main-nav a.active::after{
      left:12px;
      right:auto;
      width:34px;
      bottom:6px;
    }
    .header-actions .btn-sm{
      display:none;
    }
    .trend-wrap{grid-template-columns:1fr;}
    .group-panel{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;}
  }

  @media(max-width:768px){
    .section{padding:56px 0;}
    .page-hero{padding:42px 0;}
    .page-hero h1{font-size:32px;}
    .section-title{font-size:25px;}
    .container{padding-left:20px;padding-right:20px;}
    .brand-text strong{font-size:15px;}
    .brand-mark{width:36px;height:36px;}
    .feature-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr;}
    .cta-panel{padding:32px 22px;}
    .cta-buttons .btn{width:100%;}
    .board-row{padding:16px 2px;}
    .visual-mask{padding:20px;}
    .data-metric{flex-wrap:wrap;}
    .metric-num{width:100%;}
  }

  @media(max-width:520px){
    .container{padding-left:16px;padding-right:16px;}
    .hero-actions .btn{width:100%;}
    .hero-hint .tag-pill{width:100%;}
    .btn{width:auto;}
    .header-actions .btn{display:none;}
    .header-actions .btn-ghost{display:inline-flex;}
    .page-hero h1{font-size:28px;}
    .section-eyebrow{font-size:12px;}
    .faq-item summary{font-size:15px;padding:17px;}
    .footer-copy{flex-direction:column;align-items:flex-start;}
  }