/* roulang page: index */
:root{
  --bg:#0B0F1A;
  --surface:#121A29;
  --surface-2:#0E1522;
  --line:rgba(255,255,255,0.08);
  --text:#F2F6FC;
  --text-2:#9AAAC0;
  --text-3:#64748B;
  --primary:#39D9C0;
  --primary-bright:#57E8D2;
  --accent:#F2C25C;
  --danger:#EF6262;
  --success:#4CC38A;
  --radius-s:8px;
  --radius-m:12px;
  --radius-l:16px;
  --shadow:0 12px 32px rgba(0,0,0,0.35);
  --space:96px;
  --container:1140px;
  --font:Inter, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(57,217,192,0.06), transparent 26rem),
    radial-gradient(circle at 85% 75%, rgba(242,194,92,0.05), transparent 22rem),
    radial-gradient(circle at 1px 1px, rgba(255,255,255,0.05) 1px, transparent 0);
  background-size:auto, auto, 120px 120px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;background:none;color:inherit}
input,select,textarea{font:inherit}
ul,ol,dl{list-style:none}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:3px;
  border-radius:4px;
}
.container{width:min(1140px,100% - 48px);margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:8px;
  font-weight:600;
  font-size:15px;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background .2s, border-color .2s, color .2s, transform .15s, box-shadow .2s;
}
.btn svg{width:18px;height:18px}
.btn-primary{
  color:#07111C;
  background:var(--primary);
}
.btn-primary:hover{
  background:var(--primary-bright);
  box-shadow:0 8px 20px rgba(57,217,192,0.2);
}
.btn-primary:active, .btn-dark:active, .btn-outline:active{transform:translateY(1px)}
.btn-outline{
  color:var(--text);
  border:1px solid rgba(255,255,255,.42);
  background:transparent;
}
.btn-outline:hover{
  border-color:var(--primary);
  color:var(--primary);
}
.btn-dark{
  color:#07111C;
  background:#F7FAFC;
}
.btn-dark:hover{
  background:#FFFFFF;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:36px;
  height:36px;
  border-radius:10px;
  background:rgba(57,217,192,.14);
  border:1px solid rgba(57,217,192,.4);
  display:grid;
  place-items:center;
  color:var(--primary);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.2;
}
.brand-line{
  font-size:17px;
  font-weight:700;
  letter-spacing:.2px;
}
.brand-sub{
  font-size:12px;
  color:var(--text-2);
  letter-spacing:.2px;
  margin-top:2px;
}

.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(11,15,26,.55);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:background .3s,border-color .3s,box-shadow .3s;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(11,15,26,.94);
  border-bottom-color:var(--line);
  box-shadow:0 8px 30px rgba(0,0,0,.3);
}
.header-inner{
  min-height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.site-nav{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 16px;
  color:var(--text-2);
  font-weight:500;
  font-size:15px;
  transition:color .2s;
}
.nav-link:hover{color:var(--text)}
.nav-link.active{
  color:var(--text);
}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:16px;
  right:16px;
  bottom:2px;
  height:2px;
  border-radius:4px;
  background:var(--primary);
  box-shadow:0 0 10px rgba(57,217,192,.5);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
}
.header-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 18px;
  border-radius:8px;
  background:var(--primary);
  color:#07111C;
  font-weight:600;
  font-size:14px;
  transition:background .2s, transform .15s;
}
.header-cta svg{width:16px;height:16px}
.header-cta:hover{background:var(--primary-bright)}

.burger{
  display:none;
  width:44px;
  height:44px;
  border-radius:8px;
  align-items:center;
  justify-content:center;
  color:var(--text);
  border:1px solid var(--line);
}
.burger svg{width:22px;height:22px}

.mobile-menu{
  position:fixed;
  inset:0;
  background:rgba(9,12,22,.98);
  z-index:200;
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:24px;
  opacity:0;
  visibility:hidden;
  transform:translateX(20px);
  transition:opacity .25s,visibility .25s,transform .25s;
}
.mobile-menu.open{opacity:1;visibility:visible;transform:none}
.mobile-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.mobile-close{
  width:44px;
  height:44px;
  border-radius:8px;
  border:1px solid var(--line);
  display:grid;
  place-items:center;
  color:var(--text);
}
.mobile-close svg{width:20px;height:20px}
.mobile-nav{
  display:flex;
  flex-direction:column;
  gap:4px;
  margin-top:8px;
}
.mobile-nav a{
  display:flex;
  align-items:center;
  min-height:52px;
  padding:0 12px;
  border-radius:8px;
  font-size:17px;
  color:var(--text-2);
  font-weight:600;
  border-bottom:1px solid rgba(255,255,255,.05);
}
.mobile-nav a:hover,.mobile-nav a.active{
  color:var(--primary);
  background:rgba(57,217,192,.08);
}
.mobile-menu-cta{
  margin-top:8px;
}
.mobile-menu .btn{width:100%}

.hero{
  position:relative;
  padding:84px 0 96px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.16;
  pointer-events:none;
}
.hero-bg::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:200px;
  background:linear-gradient(180deg,transparent,#0B0F1A);
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,6fr);
  gap:64px;
  align-items:center;
}
.hero-copy{
  max-width:600px;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px 5px 8px;
  border-radius:999px;
  border:1px solid rgba(57,217,192,.35);
  background:rgba(57,217,192,.08);
  color:#9DE4DA;
  font-size:13px;
  font-weight:500;
  margin-bottom:22px;
}
.hero-badge i{
  display:inline-block;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 3px rgba(57,217,192,.16);
}
.hero h1{
  font-size:42px;
  line-height:1.25;
  font-weight:800;
  letter-spacing:0;
  margin-bottom:22px;
}
.hero h1 .hl-primary{
  display:block;
  color:var(--text);
}
.hero h1 .hl-desc{
  display:block;
  color:#CBD8EA;
  font-size:30px;
  font-weight:600;
  line-height:1.4;
  margin-top:4px;
}
.hero-sub{
  font-size:16.5px;
  color:var(--text-2);
  line-height:1.85;
  margin-bottom:32px;
  max-width:520px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:30px;
}
.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  padding-top:20px;
  border-top:1px solid var(--line);
}
.hero-points span{
  position:relative;
  padding-left:22px;
  color:var(--text-2);
  font-size:14px;
}
.hero-points span::before{
  content:"";
  position:absolute;
  left:0;
  top:10px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 3px rgba(242,194,92,.14);
}

.hero-visual{
  position:relative;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.12);
  min-height:430px;
  background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  overflow:hidden;
  box-shadow:0 24px 60px rgba(0,0,0,.45);
}
.hero-visual::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(200deg,rgba(11,15,26,.12),rgba(11,15,26,.64));
}
.visual-hud{
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.06) 1px, transparent 1px);
  background-size:48px 48px;
  mix-blend-mode:screen;
  opacity:.8;
}
.scope-tag{
  position:absolute;
  background:rgba(10,16,27,.78);
  border:1px solid rgba(255,255,255,.14);
  border-radius:8px;
  padding:8px 12px;
  font-family:"SFMono-Regular","Cascadia Code",Consolas,monospace;
  font-size:12px;
  color:#C7F6EF;
  backdrop-filter:blur(8px);
  line-height:1.5;
}
.scope-tag b{
  color:#F7FBFF;
  font-weight:600;
}
.tag-ra{left:18px;top:22px}
.tag-dec{right:18px;top:56px}
.tag-az{left:24px;bottom:28px}
.tag-liv{right:22px;bottom:20px;background:rgba(57,217,192,.12);border-color:rgba(57,217,192,.4)}
.visual-foot{
  position:absolute;
  right:20px;
  left:20px;
  bottom:70px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:#D5E4F6;
  z-index:2;
  opacity:.9;
}
.visual-foot strong{
  display:block;
  color:#fff;
  font-size:15px;
}

.section{
  padding:96px 0;
  scroll-margin-top:70px;
}
.section-head{
  max-width:720px;
  margin-bottom:48px;
}
.section-head.center{
  margin-inline:auto;
  text-align:center;
}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--primary);
  font-size:13px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-head .eyebrow::before{
  content:"";
  width:18px;
  height:1px;
  background:var(--primary);
}
.section-head.center .eyebrow::before{
  display:none;
}
.section-head h2{
  font-size:32px;
  line-height:1.3;
  font-weight:800;
  margin-bottom:14px;
  letter-spacing:-.2px;
}
.section-head p{
  color:var(--text-2);
  font-size:16px;
  line-height:1.9;
}

.showcase{
  background:var(--surface-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}

.viewport-card{
  position:relative;
  border:1px solid rgba(255,255,255,.1);
  background:rgba(255,255,255,.04);
  border-radius:14px;
  overflow:hidden;
  padding:26px 26px 20px;
  box-shadow:var(--shadow);
}
.window-frame{
  overflow:hidden;
  border-radius:12px;
  background:#0A0F19;
  border:1px solid rgba(255,255,255,.06);
}
.window-bar{
  height:48px;
  display:flex;
  align-items:center;
  gap:20px;
  padding:0 16px;
  background:#151E2E;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.window-dots{
  display:flex;
  gap:6px;
}
.window-dots i{
  width:11px;
  height:11px;
  border-radius:50%;
  background:#2A3548;
}
.window-dots i:nth-child(1){background:var(--danger)}
.window-dots i:nth-child(2){background:var(--accent)}
.window-dots i:nth-child(3){background:var(--success)}
.window-path{
  height:28px;
  flex:1;
  max-width:400px;
  display:flex;
  align-items:center;
  padding:0 12px;
  border-radius:6px;
  background:rgba(255,255,255,.07);
  color:var(--text-3);
  font-size:12.5px;
}
.shot-viewport{
  overflow:hidden;
  position:relative;
  background:#050811;
}
.shot-track{
  display:flex;
  transition:transform .65s cubic-bezier(.2,.7,.2,1);
}
.shot-slide{
  flex:0 0 100%;
  min-width:0;
  position:relative;
  aspect-ratio:16/8.6;
  overflow:hidden;
}
.shot-slide img{
  width:100%;
  height:100%;
  object-fit:cover;
  user-select:none;
}
.shot-slide-caption{
  position:absolute;
  left:16px;
  right:16px;
  bottom:16px;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  padding:18px;
  border-radius:12px;
  background:rgba(11,15,26,.72);
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.12);
}
.shot-slide-caption h3{
  font-size:17px;
  color:#fff;
  font-weight:700;
}
.shot-slide-caption p{
  margin-top:4px;
  font-size:14px;
  color:#C9D5E7;
  max-width:60%;
  line-height:1.7;
}
.shot-nav{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  z-index:5;
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  border-radius:50%;
  background:rgba(12,18,29,.72);
  border:1px solid rgba(255,255,255,.14);
  color:#fff;
  cursor:pointer;
  backdrop-filter:blur(6px);
  transition:background .2s,border-color .2s;
}
.shot-nav:hover{
  background:rgba(57,217,192,.28);
  border-color:var(--primary);
}
.shot-nav svg{width:18px;height:18px}
.shot-prev{left:12px}
.shot-next{right:12px}
.shot-pager{
  display:flex;
  justify-content:center;
  gap:8px;
  margin-top:16px;
}
.pager-dot{
  width:8px;
  height:8px;
  border-radius:999px;
  background:rgba(255,255,255,.2);
  cursor:pointer;
  transition:all .22s;
}
.pager-dot.active{
  background:var(--primary);
  width:26px;
}

.detail-rows{
  margin-top:44px;
  border-top:1px solid rgba(255,255,255,.08);
}
.detail-row{
  display:grid;
  grid-template-columns:84px minmax(0,1fr) minmax(0,1.2fr);
  gap:24px;
  align-items:center;
  padding:24px 24px 24px 4px;
  border-bottom:1px solid rgba(255,255,255,.07);
  transition:background .2s,padding-left .2s;
}
.detail-row:hover{
  background:rgba(255,255,255,.03);
  padding-left:12px;
}
.detail-index{
  font-family:"Cascadia Code",Consolas,monospace;
  font-size:15px;
  color:var(--primary);
  font-weight:600;
}
.detail-row h3{
  font-size:18px;
  font-weight:700;
}
.detail-row p{
  color:var(--text-2);
  font-size:15px;
  line-height:1.8;
}

.requirements-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
  margin-bottom:34px;
}
.req-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  padding:28px;
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.req-card:hover{
  transform:translateY(-3px);
  border-color:rgba(57,217,192,.35);
  box-shadow:var(--shadow);
}
.platform-title{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:18px;
  font-weight:700;
  margin-bottom:22px;
}
.platform-title svg{
  width:24px;
  height:24px;
  color:var(--primary);
}
.req-list{
  display:flex;
  flex-direction:column;
}
.req-item{
  display:grid;
  grid-template-columns:110px 1fr;
  padding:14px 0;
  border-top:1px solid rgba(255,255,255,.06);
}
.req-item dt{
  color:var(--text-3);
  font-size:14px;
  font-weight:500;
}
.req-item dd{
  color:var(--text);
  font-size:15px;
}
.badge-ok{
  display:inline-block;
  margin-left:8px;
  padding:1px 7px;
  border-radius:999px;
  font-size:11px;
  background:rgba(57,217,192,.13);
  color:var(--primary);
  vertical-align:2px;
}
.badge-off{
  display:inline-block;
  margin-left:8px;
  padding:1px 7px;
  border-radius:999px;
  font-size:11px;
  background:rgba(239,98,98,.12);
  color:var(--danger);
  vertical-align:2px;
}

.usr-cards{
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:24px;
}
.usr-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  padding:28px 24px 24px;
  overflow:hidden;
  transition:transform .2s,border-color .2s;
}
.usr-card:hover{
  transform:translateY(-4px);
  border-color:rgba(242,194,92,.36);
}
.usr-card-icon{
  width:44px;
  height:44px;
  border-radius:12px;
  background:rgba(57,217,192,.1);
  display:grid;
  place-items:center;
  color:var(--primary);
  margin-bottom:18px;
}
.usr-card-icon svg{width:22px;height:22px}
.usr-card h3{
  font-size:18px;
  margin-bottom:8px;
}
.usr-card .usr-tag{
  display:inline-block;
  padding:3px 10px;
  border-radius:999px;
  background:rgba(242,194,92,.12);
  color:var(--accent);
  font-size:12px;
  font-weight:600;
  margin-bottom:14px;
}
.usr-card p{
  color:var(--text-2);
  font-size:15px;
}

.download-section{
  background:var(--surface-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.download-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.download-card{
  background:#0A101C;
  border:1px solid var(--line);
  border-radius:16px;
  padding:22px 20px 20px;
  display:flex;
  flex-direction:column;
  transition:border-color .2s,transform .2s,box-shadow .2s;
}
.download-card:hover{
  transform:translateY(-4px);
  border-color:rgba(57,217,192,.42);
  box-shadow:var(--shadow);
}
.download-icon{
  width:46px;
  height:46px;
  border-radius:12px;
  background:rgba(255,255,255,.07);
  display:grid;
  place-items:center;
  margin-bottom:16px;
  color:#D8E7FF;
}
.download-card.web{
  border-color:rgba(57,217,192,.3);
}
.download-card.web .download-icon{
  background:rgba(57,217,192,.12);
  color:var(--primary);
}
.download-card h3{
  font-size:17px;
  font-weight:700;
  margin-bottom:2px;
}
.download-card .version-note{
  font-size:12.5px;
  color:var(--text-3);
  margin-bottom:14px;
}
.download-card .btn{
  width:100%;
  height:44px;
  margin-top:auto;
}
.download-footnote{
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  margin-top:28px;
  padding-top:20px;
  border-top:1px solid var(--line);
  color:var(--text-3);
  font-size:13.5px;
}
.download-footnote svg{
  width:14px;
  height:14px;
  display:inline-block;
  vertical-align:-2px;
  margin-right:4px;
  color:var(--success);
}

.news-section{
  background:#0A0F19;
}
.news-panel{
  border:1px solid var(--line);
  border-radius:18px;
  overflow:hidden;
  background:var(--surface);
}
.news-empty{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  min-height:260px;
  gap:12px;
  padding:40px;
  text-align:center;
  color:var(--text-2);
}
.news-empty svg{
  width:42px;
  height:42px;
  color:var(--text-3);
  opacity:.5;
}
.news-split{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
}
.news-lead{
  position:relative;
  padding:10px;
  background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,0));
}
.news-lead a{
  display:flex;
  flex-direction:column;
  height:100%;
  min-height:360px;
  border-radius:12px;
  overflow:hidden;
}
.news-lead-image{
  height:190px;
  overflow:hidden;
}
.news-lead-image img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.news-lead a:hover .news-lead-image img{
  transform:scale(1.04);
}
.news-lead-body{
  padding:20px 22px 22px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.news-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:10px;
}
.news-cat{
  display:inline-block;
  padding:2px 9px;
  border-radius:6px;
  background:rgba(57,217,192,.13);
  color:var(--primary);
  font-size:12px;
  font-weight:600;
}
.news-date{
  font-size:13px;
  color:var(--text-3);
}
.news-lead-body h3{
  font-size:19px;
  line-height:1.5;
  font-weight:700;
  margin-bottom:10px;
  color:var(--text);
}
.news-lead-body p{
  color:var(--text-2);
  font-size:14.5px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-list{
  display:flex;
  flex-direction:column;
  border-left:1px solid var(--line);
  background:rgba(255,255,255,.012);
}
.news-list-item{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:20px 24px;
  border-bottom:1px solid var(--line);
  transition:background .2s;
}
.news-list-item:last-child{
  border-bottom:0;
}
.news-list-item:hover{
  background:rgba(57,217,192,.04);
}
.news-list-item .news-item-meta{
  display:flex;
  align-items:center;
  gap:10px;
}
.news-list-item h3{
  font-size:16px;
  line-height:1.5;
  font-weight:650;
  color:var(--text);
  transition:color .2s;
  overflow:hidden;
  text-overflow:ellipsis;
  display:-webkit-box;
  -webkit-line-clamp:1;
  -webkit-box-orient:vertical;
}
.news-list-item:hover h3{
  color:var(--primary);
}
.news-list-item p{
  font-size:13.5px;
  color:var(--text-2);
  overflow:hidden;
  text-overflow:ellipsis;
  display:-webkit-box;
  -webkit-line-clamp:1;
  -webkit-box-orient:vertical;
}
.view-source{
  position:absolute;
  right:16px;
  top:50%;
  transform:translateY(-50%);
  color:var(--text-3);
  opacity:0;
  transition:opacity .2s,color .2s,transform .2s;
}
.news-list-item:hover .view-source{
  opacity:1;
  color:var(--primary);
  transform:translateY(-50%) translateX(3px);
}
.view-source svg{
  width:16px;
  height:16px;
}

.faq-section{
  background:var(--surface-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.faq-wrap{
  max-width:860px;
  margin-inline:auto;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  transition:border-color .2s,background .2s;
}
.faq-item[open]{
  border-color:rgba(57,217,192,.4);
}
.faq-item summary{
  position:relative;
  display:flex;
  align-items:center;
  min-height:64px;
  padding:16px 60px 16px 24px;
  list-style:none;
  cursor:pointer;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  transition:background .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{
  background:rgba(255,255,255,.02);
}
.faq-item-icon{
  position:absolute;
  right:20px;
  top:50%;
  width:26px;
  height:26px;
  transform:translateY(-50%);
  display:grid;
  place-items:center;
  border-radius:50%;
  background:rgba(57,217,192,.12);
  color:var(--primary);
  transition:transform .25s,background .2s;
}
.faq-item-icon svg{
  width:14px;
  height:14px;
}
.faq-item[open] .faq-item-icon{
  transform:translateY(-50%) rotate(45deg);
  background:var(--primary);
  color:#07111C;
}
.faq-answer{
  padding:0 24px 24px;
  border-top:1px dashed rgba(255,255,255,.11);
  margin:0 24px 0 24px;
  padding:18px 0 22px;
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.9;
}

.cta-banner{
  position:relative;
  overflow:hidden;
  background:#0E141F;
  border-bottom:1px solid var(--line);
}
.cta-content{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  padding:64px 0;
}
.cta-text h2{
  font-size:30px;
  font-weight:800;
  line-height:1.35;
  margin-bottom:10px;
}
.cta-text p{
  color:var(--text-2);
  max-width:540px;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
}

.footer{
  background:#080C14;
  padding:64px 0 32px;
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:48px;
  margin-bottom:48px;
}
.footer-brand .brand{
  margin-bottom:16px;
}
.footer-brand p{
  color:var(--text-2);
  font-size:14.5px;
  max-width:320px;
}
.footer h4{
  font-size:15px;
  margin-bottom:18px;
  color:var(--text);
  letter-spacing:.04em;
  font-weight:700;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.footer-links a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text-2);
  font-size:14.5px;
  transition:color .2s,transform .2s;
}
.footer-links a:hover{
  color:var(--primary);
  transform:translateX(2px);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:24px;
  border-top:1px solid var(--line);
  color:var(--text-3);
  font-size:13px;
}

@media (max-width:1024px){
  .section{padding:80px 0}
  .hero-inner{gap:36px}
  .hero h1{font-size:36px}
  .download-grid{grid-template-columns:repeat(2,1fr)}
  .usr-cards{grid-template-columns:1fr 1fr}
  .news-split{grid-template-columns:1fr}
  .news-list{border-left:0;border-top:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:860px){
  .site-nav,.header-search{display:none}
  .burger{display:inline-flex}
  .hero{
    padding-top:56px;
  }
  .hero-inner{
    grid-template-columns:1fr;
    gap:48px;
  }
  .hero-copy{
    max-width:100%;
  }
  .hero-visual{
    min-height:360px;
    order:2;
  }
  .detail-row{
    grid-template-columns:48px 1fr;
    gap:10px 18px;
    padding-left:0;
  }
  .detail-row p{
    grid-column:1 / -1;
  }
  .requirements-grid{
    grid-template-columns:1fr;
  }
  .cta-content{
    flex-direction:column;
  }
  .cta-actions{
    width:100%;
  }
}

@media (max-width:640px){
  :root{--space:56px}
  .container{width:min(1140px,100% - 28px)}
  .section{padding:64px 0}
  .header-inner{min-height:60px}
  .brand-mark{width:32px;height:32px;border-radius:8px}
  .brand-line{font-size:16px}
  .brand-sub{font-size:11px}
  .hero{padding:44px 0 68px}
  .hero h1{font-size:30px}
  .hero h1 .hl-desc{font-size:23px;margin-top:8px}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{width:100%}
  .hero-points{flex-direction:column;align-items:flex-start}
  .hero-visual{min-height:300px}
  .scope-tag{font-size:10px;padding:5px 8px}
  .shot-slide-caption{
    flex-direction:column;
    padding:12px;
    gap:2px;
  }
  .shot-slide-caption p{max-width:100%}
  .shot-slide-caption h3{font-size:15px}
  .detail-row{grid-template-columns:1fr;padding:20px 0 20px 2px;gap:4px}
  .detail-index{font-size:13px}
  .section-head h2{font-size:26px}
  .section-head p{font-size:15px}
  .shot-nav{width:38px;height:38px;top:45%}
  .download-grid{grid-template-columns:1fr}
  .usr-cards{grid-template-columns:1fr}
  .news-panel{border-radius:14px}
  .news-list-item{padding:18px 16px}
  .news-list-item .news-item-meta{flex-wrap:wrap}
  .view-source{display:none}
  .faq-item summary{font-size:15.5px;padding-left:18px}
  .faq-answer{padding-left:0;padding-right:0;margin-left:18px;margin-right:18px}
  .cta-content{padding:48px 0}
  .cta-text h2{font-size:25px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column}
}

@media (max-width:420px){
  .hero h1{font-size:26px}
  .hero h1 .hl-desc{font-size:21px}
  .hero-actions .btn{font-size:15px}
  .btn{padding:0 18px}
  .window-bar{gap:10px;justify-content:space-between}
  .window-path{display:none}
}

/* roulang page: category1 */
:root{
  --bg:#0B0F1A;
  --bg-2:#121A29;
  --bg-3:#0E1522;
  --border:rgba(255,255,255,0.08);
  --text:#F2F6FC;
  --text-2:#9AAAC0;
  --text-3:#64748B;
  --primary:#39D9C0;
  --primary-hover:#52e6ce;
  --amber:#F2C25C;
  --danger:#EF6262;
  --success:#4CC38A;
  --radius:12px;
  --radius-lg:16px;
  --shadow:0 12px 32px rgba(0,0,0,0.35);
  --section-space:96px;
  --max-width:1140px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,0.16), transparent),
    radial-gradient(1px 1px at 120px 80px, rgba(255,255,255,0.12), transparent),
    radial-gradient(1.5px 1.5px at 240px 160px, rgba(255,255,255,0.1), transparent),
    radial-gradient(1px 1px at 300px 40px, rgba(255,255,255,0.14), transparent),
    radial-gradient(2px 2px at 480px 220px, rgba(255,255,255,0.1), transparent);
}
a{color:var(--text-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* Header */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  height:64px;
  z-index:100;
  background:rgba(11,15,26,0.6);
  border-bottom:1px solid transparent;
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.site-header.scrolled{
  background:rgba(11,15,26,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom-color:var(--border);
  box-shadow:0 8px 30px rgba(0,0,0,0.25);
}
.header-inner{
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;
  border-radius:10px;
  background:rgba(57,217,192,0.1);
  border:1px solid rgba(57,217,192,0.25);
  color:var(--primary);
  flex-shrink:0;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-line{
  font-size:17px;
  font-weight:700;
  color:var(--text);
  letter-spacing:0.02em;
}
.brand-sub{
  font-size:11px;
  color:var(--text-2);
  letter-spacing:0.08em;
}
.site-nav{
  display:flex;
  align-items:center;
  gap:30px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  font-size:14.5px;
  font-weight:500;
  color:var(--text-2);
  padding:20px 0;
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--primary);
  opacity:0;
  transform:scaleX(0.4);
  transition:all .25s ease;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{
  opacity:0.6;
  transform:scaleX(0.7);
}
.nav-link.active{color:var(--primary)}
.nav-link.active::after{
  opacity:1;
  transform:scaleX(1);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.header-cta{
  display:inline-flex;
  align-items:center;
  gap:7px;
  height:40px;
  padding:0 18px;
  border-radius:8px;
  background:var(--primary);
  color:#0B0F1A;
  font-size:14px;
  font-weight:600;
  transition:background .2s ease,transform .15s ease;
}
.header-cta:hover{background:var(--primary-hover);color:#0B0F1A}
.header-cta svg{width:16px;height:16px}
.burger{
  display:none;
  width:44px;height:44px;
  background:transparent;
  border:1px solid var(--border);
  border-radius:8px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  color:var(--text);
  transition:border-color .2s ease,background .2s ease;
}
.burger:hover{border-color:var(--primary)}
.burger svg{width:20px;height:20px}
.mobile-menu{
  position:fixed;
  inset:0;
  z-index:200;
  background:rgba(11,15,26,0.98);
  backdrop-filter:blur(8px);
  display:flex;
  flex-direction:column;
  padding:24px;
  opacity:0;
  visibility:hidden;
  transform:translateX(100%);
  transition:all .3s ease;
}
.mobile-menu.open{
  opacity:1;
  visibility:visible;
  transform:translateX(0);
}
.mobile-menu-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:36px;
}
.mobile-menu-close{
  width:44px;height:44px;
  background:transparent;
  border:1px solid var(--border);
  border-radius:8px;
  color:var(--text);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.mobile-menu-nav{
  display:flex;
  flex-direction:column;
  gap:4px;
}
.mobile-menu-nav a{
  font-size:20px;
  font-weight:600;
  color:var(--text);
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.mobile-menu-nav a:hover{color:var(--primary)}
.mobile-menu-nav a.active{color:var(--primary)}
.mobile-menu-footer{
  margin-top:auto;
  padding-bottom:24px;
}

/* Hero */
.page-hero{
  position:relative;
  padding:150px 0 64px;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  background-attachment:fixed;
  isolation:isolate;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg, rgba(11,15,26,0.78) 0%, rgba(11,15,26,0.62) 50%, rgba(11,15,26,0.88) 100%);
  z-index:1;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(255,255,255,0.015) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(255,255,255,0.015) 40px);
}
.page-hero .container{position:relative;z-index:2}
.hero-row{
  display:grid;
  grid-template-columns:1.2fr 0.8fr;
  gap:64px;
  align-items:center;
}
.hero-content-h1{
  font-size:44px;
  line-height:1.18;
  font-weight:800;
  letter-spacing:-0.02em;
  color:var(--text);
  margin-bottom:18px;
}
.hero-content-h1 .gradient-text{
  color:var(--primary);
}
.hero-content-h1 .block-row{
  display:block;
}
.hero-sub{
  font-size:17px;
  color:var(--text-2);
  line-height:1.9;
  margin-bottom:10px;
}
.hero-sub .highlight{color:var(--amber);font-weight:600}
.hero-lead{
  font-size:15px;
  color:var(--text-3);
  margin-top:6px;
  margin-bottom:28px;
  border-left:3px solid rgba(57,217,192,0.4);
  padding-left:16px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  margin-top:24px;
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:50px;
  padding:0 28px;
  background:var(--primary);
  color:#0B0F1A;
  font-size:16px;
  font-weight:600;
  border:none;
  border-radius:8px;
  cursor:pointer;
  transition:background .2s ease,transform .15s ease,box-shadow .2s ease;
}
.btn-primary:hover{
  background:var(--primary-hover);
  color:#0B0F1A;
  transform:translateY(-1px);
  box-shadow:0 8px 24px rgba(57,217,192,0.18);
}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:50px;
  padding:0 26px;
  background:transparent;
  color:var(--text);
  font-size:16px;
  font-weight:500;
  border:1px solid rgba(255,255,255,0.22);
  border-radius:8px;
  cursor:pointer;
  transition:all .2s ease;
}
.btn-ghost:hover{
  border-color:var(--primary);
  color:var(--primary);
  transform:translateY(-1px);
}
.btn-ghost:active{transform:translateY(1px)}
.btn-primary:focus-visible,.btn-ghost:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
}
.btn-download{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  min-width:170px;
  height:auto;
  padding:14px 20px;
  border-radius:12px;
  gap:4px;
  text-align:center;
  transition:all .2s ease;
}
.btn-download .dl-main{
  font-size:15px;
  font-weight:600;
  display:flex;
  align-items:center;
  gap:8px;
}
.btn-download .dl-sub{
  font-size:12px;
  color:var(--text-3);
  font-weight:400;
}
.btn-download .dl-main svg{width:18px;height:18px}
.hero-visual{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid rgba(255,255,255,0.06);
  box-shadow:var(--shadow);
}
.hero-visual-image{
  width:100%;
  height:auto;
  min-height:400px;
  object-fit:cover;
}
.hero-stats{
  display:flex;
  gap:24px;
  margin-top:38px;
  flex-wrap:wrap;
}
.hero-stat-value{
  font-size:28px;
  font-weight:700;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
}
.hero-stat-label{
  font-size:13px;
  color:var(--text-3);
  margin-top:2px;
}
.hero-tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:28px;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 14px;
  border-radius:999px;
  background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.08);
  font-size:12.5px;
  color:var(--text-2);
}
.tag svg{width:13px;height:13px}
.tag-primary{border-color:rgba(57,217,192,0.25);color:var(--primary)}


/* Section */
.section{padding:var(--section-space) 0;position:relative}
.section-alt{background:var(--bg-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{
  margin-bottom:48px;
  max-width:820px;
}
.section-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--primary);
  margin-bottom:12px;
}
.section-badge::before{
  content:"";
  width:6px;height:6px;
  background:var(--primary);
  border-radius:50%;
  box-shadow:0 0 0 3px rgba(57,217,192,0.18);
}
.section-title{
  font-size:32px;
  line-height:1.25;
  font-weight:700;
  color:var(--text);
  margin-bottom:12px;
  letter-spacing:-0.01em;
}
.section-sub{
  font-size:16px;
  color:var(--text-2);
  line-height:1.9;
}

/* Steps */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:32px;
  margin-bottom:48px;
}
.step-card{
  background:var(--bg-2);
  border:1px solid var(--border);
  border-radius:14px;
  padding:30px;
  position:relative;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.step-card:hover{
  transform:translateY(-4px);
  border-color:rgba(57,217,192,0.25);
  box-shadow:var(--shadow);
}
.step-num{
  width:44px;height:44px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  background:rgba(57,217,192,0.1);
  border:1px solid rgba(57,217,192,0.25);
  color:var(--primary);
  font-size:18px;
  font-weight:700;
  margin-bottom:20px;
}
.step-card h3{
  color:var(--text);
  font-size:17px;
  font-weight:600;
  margin-bottom:10px;
}
.step-card p{
  color:var(--text-2);
  font-size:14.5px;
  line-height:1.85;
}

/* Split section */
.split-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.split-media{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  box-shadow:var(--shadow);
}
.split-media img{width:100%;height:auto;display:block}
.media-caption{
  position:absolute;
  left:14px;bottom:14px;
  background:rgba(11,15,26,0.8);
  backdrop-filter:blur(8px);
  padding:6px 14px;
  border-radius:8px;
  font-size:12.5px;
  color:var(--text-2);
  border:1px solid var(--border);
}
.split-content-top{
  font-size:13px;
  color:var(--primary);
  font-weight:600;
  letter-spacing:0.06em;
  display:block;
  margin-bottom:10px;
}
.split-content h2{
  font-size:28px;
  line-height:1.3;
  font-weight:700;
  color:var(--text);
  margin-bottom:16px;
}
.split-content p{
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.9;
  margin-bottom:24px;
}
.check-list{
  list-style:none;
  margin:20px 0;
}
.check-list li{
  position:relative;
  padding-left:32px;
  color:var(--text);
  font-size:15px;
  margin-bottom:16px;
  line-height:1.8;
}
.check-list li svg{
  position:absolute;
  left:0;top:4px;
  width:18px;height:18px;
  color:var(--primary);
}
.check-list li span{
  display:block;
  color:var(--text-2);
  font-size:13.5px;
  margin-top:2px;
}

/* Credentials / account panel */
.account-row{
  display:grid;
  grid-template-columns:1.15fr 0.85fr;
  gap:48px;
  margin-top:40px;
  align-items:center;
}
.browser-list{
  display:grid;
  gap:14px;
  margin-top:20px;
}
.browser-item{
  display:flex;
  align-items:center;
  gap:16px;
  background:rgba(255,255,255,0.03);
  border:1px solid var(--border);
  border-radius:12px;
  padding:14px 18px;
  transition:all .2s ease;
  font-size:14.5px;
}
.browser-item:hover{
  background:var(--bg-3);
  border-color:rgba(57,217,192,0.4);
  transform:translateX(4px);
}
.icon-box{
  width:38px;
  height:38px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:9px;
  background:rgba(57,217,192,0.08);
  border:1px solid rgba(57,217,192,0.2);
  color:var(--primary);
  flex-shrink:0;
}
.icon-box svg{width:18px;height:18px}
.browser-item-text{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--text);
}
.mark{
  display:inline-block;
  padding:2px 10px;
  border-radius:5px;
  font-size:12px;
  font-weight:600;
  background:rgba(57,217,192,0.12);
  color:var(--primary);
  margin-left:4px;
}
.mark-hidden{
  background:rgba(100,116,139,0.15);
  color:red;
  color:var(--danger);
  text-decoration:line-through;
}
.notice-card{
  background:var(--bg-2);
  border-left:3px solid var(--amber);
  border-radius:0 12px 12px 0;
  padding:24px;
  margin-top:28px;
}
.notice-card strong{
  color:var(--amber);
  font-weight:600;
  display:block;
  margin-bottom:8px;
}
.notice-card p{
  color:var(--text-2);
  font-size:14.5px;
}

/* CTA panel */
.cta-panel{
  background:var(--bg-2);
  border:1px solid var(--border);
  border-radius:16px;
  padding:48px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-panel::before{
  content:"";
  position:absolute;
  width:240px;
  height:240px;
  background:radial-gradient(circle, rgba(57,217,192,0.14), transparent 70%);
  top:-80px;left:-60px;
}
.cta-panel h2{
  font-size:28px;
  margin-bottom:14px;
  color:var(--text);
}
.cta-panel p{
  color:var(--text-2);
  font-size:16px;
  margin-bottom:28px;
  max-width:600px;
  margin-left:auto;
  margin-right:auto;
}
.cta-actions{
  display:flex;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}
.cta-note{
  margin-top:16px;
  font-size:13px;
  color:var(--text-3);
}

/* FAQ */
.faq-accordion{
  max-width:860px;
}
.faq-item{
  background:var(--bg-2);
  border:1px solid var(--border);
  border-radius:12px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item[open]{border-color:rgba(57,217,192,0.25)}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 28px;
  font-size:15px;
  color:var(--text);
  cursor:pointer;
  list-style:none;
  font-weight:500;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .arrow{
  width:22px;height:22px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .2s ease;
  color:var(--primary);
  flex-shrink:0;
}
.faq-item summary .arrow svg{width:16px;height:16px}
.faq-item[open] summary .arrow{transform:rotate(45deg)}
.faq-answer{
  padding:0 28px 28px;
  color:var(--text-2);
  font-size:14.5px;
  line-height:1.9;
  border-top:0;
}
.faq-item[open] .faq-answer{
  padding-top:20px;
}

/* Related Cards */
.cards-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.info-card{
  background:var(--bg-2);
  border:1px solid var(--border);
  padding:28px;
  border-radius:14px;
  transition:all .3s ease;
}
.info-card:hover{
  border-color:var(--primary);
  transform:translateY(-5px);
}
.icon-card{margin-bottom:18px}
.info-card h3{color:var(--text);font:600 17px/1.4 ;margin-bottom:8px}
.info-card h3{font-weight:600;font-size:17px;line-height:1.4;color:var(--text);margin-bottom:8px}
.info-card p{color:var(--text-2);font-size:14px;line-height:1.8}

/* empty state */
.empty-box{
  border:1px dashed rgba(255,255,255,0.14);
  border-radius:12px;
  background:rgba(255,255,255,0.02);
  padding:60px 20px;
  text-align:center;
}
.empty-icon{
  width:56px;height:56px;
  border-radius:50%;
  background:rgba(57,217,192,0.1);
  border:1px solid rgba(57,217,192,0.2);
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0 auto 16px;
  color:var(--primary);
}

/* Footer */
.footer{
  background:var(--bg-2);
  border-top:1px solid var(--border);
  padding-top:56px;
  padding-bottom:20px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.2fr;
  gap:40px;
  margin-bottom:44px;
}
.footer-brand p{
  color:var(--text-2);
  font-size:14px;
  margin-top:16px;
  line-height:1.9;
}
.footer h4{
  font-size:14px;
  color:var(--text);
  margin-bottom:18px;
  font-weight:600;
  letter-spacing:0.04em;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-links a{
  color:var(--text-2);
  font-size:14px;
  transition:color .2s ease,padding-left .2s ease;
  padding-left:0;
}
.footer-links a:hover{
  color:var(--primary);
  padding-left:5px;
}
.footer-bottom{
  border-top:1px solid var(--border);
  padding-top:24px;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}
.footer-bottom p{
  font-size:13px;
  color:var(--text-3);
}

/* Split wrapper */
.isolated-cta{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  background:var(--bg-2);
  border:1px solid var(--border);
}
.cta-wrapper-stars{
  display:block;
  margin-top:30px;
  border-radius:16px;
}
.waterfall-wrap{
  width:100%;
}
.solution-matrix{
  width:100%;
}
.login-block{
  width:100%;
}

/* media / alternate */
.step-arrow{
  display:none;
}

@media (max-width:1110px){
  .site-nav{gap:18px}
  .nav-link{font-size:13px}
}
@media (max-width:992px){
  .site-nav{
    display:none;
  }
  .burger{
    display:flex;
  }
  .hero-row{
    grid-template-columns:1fr;
    gap:36px;
  }
  .hero-visual{
    max-width:100%;
  }
  .hero-content-h1{font-size:36px}
  .split-grid{grid-template-columns:1fr;gap:38px}
  .cards-grid{
    grid-template-columns:repeat(2,1fr);
    gap:18px;
  }
  .steps-grid{grid-template-columns:1fr;gap:24px}
  .account-row{grid-template-columns:1fr}
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
  .section-title{font-size:28px}
  .split-content h2{font-size:24px}
  .section{padding:72px 0}
  .page-hero{padding:120px 0 48px}
}
@media (max-width:768px){
  .site-header .header-inner{padding:0 18px}
  .container{padding:0 20px}
  .header-cta{
    display:none;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:30px;
  }
  .footer-bottom{
    flex-direction:column;
  }
  .footer-bg-line{font-size:12px;}
  .hero-content-h1{font-size:30px}
  .hero-sub{font-size:15px}
  .hero-actions .btn-ghost,.hero-actions .btn-primary{width:100%}
  .step-card,.notice-card,.cta-panel{padding:24px}
  .cta-panel{padding:30px 22px}
  .cta-actions .btn-download{width:100%;min-width:unset}
  .cards-grid{grid-template-columns:1fr}
  .header-cta--nav-hidden-mobile{
    display:none;
  }
  path[mobile] {opacity:0;}
}
@media screen and (max-width:420px){
  .stack-action{display:block !important;
    width:100% !important;
  }
  .container{padding:0 16px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn-primary,
  .cta-actions .btn-ghost{width:100%;}
}

/* roulang page: article */
:root {
  --bg: #0B0F1A;
  --bg-deep: #080B14;
  --surface: #121A29;
  --surface-2: #182236;
  --surface-3: #1E2A42;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.14);
  --text-1: #F2F6FC;
  --text-2: #9AAAC0;
  --text-3: #64748B;
  --brand: #39D9C0;
  --brand-light: #52E7CF;
  --brand-dark: #0C433B;
  --amber: #F2C25C;
  --danger: #EF6262;
  --success: #4CC38A;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.24);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --container: 1140px;
  --header-h: 64px;
  --section-gap: 96px;
  --ease: 0.22s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse at 18% -4%, rgba(57, 217, 192, 0.12), transparent 42%),
    radial-gradient(ellipse at 88% 26%, rgba(242, 194, 92, 0.07), transparent 32%),
    radial-gradient(ellipse at 52% 110%, rgba(72, 108, 168, 0.08), transparent 46%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.26;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.36) 1px, transparent 1px);
  background-size: 184px 184px;
  background-position: 12px 20px;
  mask-image: radial-gradient(circle at center, #000 40%, transparent 96%);
  -webkit-mask-image: radial-gradient(circle at center, #000 40%, transparent 96%);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--text-2);
  text-decoration: none;
  transition: color var(--ease), background-color var(--ease), border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}

a:hover {
  color: var(--brand);
}

p, dl, dd, ul, ol, figure, table {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  cursor: pointer;
}

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

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: background var(--ease), border-color var(--ease), backdrop-filter var(--ease), box-shadow var(--ease);
}

.site-header.is-scrolled {
  background: rgba(11, 15, 26, 0.84);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text-1);
}

.brand-mark {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border-radius: 50%;
  background: rgba(57, 217, 192, 0.1);
  border: 1px solid rgba(57, 217, 192, 0.28);
  display: grid;
  place-items: center;
  color: var(--brand);
  transition: box-shadow var(--ease), transform var(--ease);
}

.brand:hover .brand-mark {
  box-shadow: 0 0 0 4px rgba(57, 217, 192, 0.12), 0 6px 20px rgba(57, 217, 192, 0.2);
  transform: rotate(8deg);
}

.brand-mark svg {
  width: 22px;
  height: 22px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.18;
}

.brand-line {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--text-1);
}

.brand-sub {
  font-size: 12px;
  color: var(--text-2);
  letter-spacing: 0.08em;
  margin-top: 2px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 46px;
  flex-wrap: nowrap;
}

.site-nav .nav-link {
  position: relative;
  font-size: 15px;
  color: var(--text-2);
  font-weight: 500;
  padding: 10px 13px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.site-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--ease);
}

.site-nav .nav-link:hover {
  color: var(--text-1);
}

.site-nav .nav-link:hover::after {
  transform: scaleX(0.5);
}

.site-nav .nav-link.active {
  color: var(--text-1);
}

.site-nav .nav-link.active::after {
  transform: scaleX(1);
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-sm);
  background: var(--brand);
  color: #03100E;
  font-weight: 700;
  font-size: 14px;
  line-height: 40px;
  transition: background var(--ease), transform var(--ease), box-shadow var(--ease);
}

.header-cta svg {
  width: 15px;
  height: 15px;
}

.header-cta:hover {
  background: var(--brand-light);
  color: #03100E;
  box-shadow: 0 8px 24px rgba(57, 217, 192, 0.22);
  transform: translateY(-1px);
}

.header-cta:active {
  transform: translateY(1px);
}

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

.burger:hover {
  border-color: var(--border-light);
  background: rgba(255, 255, 255, 0.08);
}

.burger svg {
  width: 20px;
  height: 20px;
}

.nav-close {
  display: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-1);
}

.nav-close svg {
  width: 20px;
  height: 20px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 22px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: all var(--ease);
  cursor: pointer;
}

.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: var(--brand);
  color: #03100E;
  box-shadow: 0 6px 18px rgba(57, 217, 192, 0.16);
}

.btn-primary:hover {
  background: var(--brand-light);
  color: #03100E;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(57, 217, 192, 0.24);
}

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

.btn-ghost {
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--border-light);
  color: var(--text-1);
}

.btn-ghost:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: rgba(57, 217, 192, 0.07);
  transform: translateY(-1px);
}

.btn-lg {
  height: 56px;
  padding: 0 32px;
  font-size: 16px;
  border-radius: var(--radius);
}

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

/* ---------- 文章头图区域 ---------- */
.article-hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 440px;
  padding: 152px 0 58px;
  overflow: hidden;
  background: var(--bg-deep);
}

.article-hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center 30%;
}

.article-hero__bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 15, 26, 0.75) 0%, rgba(8, 11, 20, 0.66) 60%, var(--bg) 100%);
}

.article-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: linear-gradient(to bottom, #000 30%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, #000 30%, transparent 100%);
}

.breadcrumb {
  position: relative;
  z-index: 2;
  margin-bottom: 26px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: center;
  font-size: 13px;
  color: var(--text-3);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.breadcrumb li:not(:last-child)::after {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.24);
  display: inline-block;
  margin-right: 2px;
}

.breadcrumb a {
  color: var(--text-3);
}

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

.breadcrumb .crumb-current {
  color: var(--text-2);
  max-width: 320px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  display: inline-block;
  vertical-align: bottom;
}

.article-hero__content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.article-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 12px;
  background: rgba(57, 217, 192, 0.12);
  border: 1px solid rgba(57, 217, 192, 0.28);
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

.article-hero__content h1 {
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.25;
  letter-spacing: 0.01em;
  font-weight: 800;
  margin: 18px 0 20px;
  max-width: 860px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.article-hero__excerpt {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-2);
  max-width: 720px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
  padding-right: 48px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 22px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  max-width: 720px;
  font-size: 13px;
  color: var(--text-3);
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-meta svg {
  width: 14px;
  height: 14px;
  color: var(--text-3);
}

.article-meta .meta-time {
  color: var(--text-2);
}

/* ---------- 文章正文区 ---------- */
.article-shell {
  position: relative;
  z-index: 3;
  margin-top: -38px;
  padding-bottom: 76px;
}

.article-paper {
  max-width: 860px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: clamp(28px, 5vw, 62px);
}

.article-body {
  max-width: 720px;
  margin: 0 auto;
  color: var(--text-1);
  font-size: 16px;
  line-height: 1.9;
}

.article-body > * + * {
  margin-top: 1.32em;
}

.article-body p {
  line-height: 1.9;
  color: #CFDBEA;
}

.article-body h2 {
  font-size: 24px;
  line-height: 1.4;
  font-weight: 750;
  color: var(--text-1);
  margin: 2.1em 0 0.75em;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.article-body h3 {
  font-size: 19px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--text-1);
  margin: 1.8em 0 0.6em;
}

.article-body h4 {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text-1);
  margin: 1.8em 0 0.45em;
}

.article-body a {
  color: var(--brand);
  text-decoration: underline;
  text-decoration-color: rgba(57, 217, 192, 0.4);
  text-underline-offset: 4px;
}

.article-body a:hover {
  color: var(--brand-light);
  text-decoration-color: var(--brand-light);
}

.article-body strong {
  color: var(--text-1);
  font-weight: 700;
}

.article-body ul,
.article-body ol {
  padding-left: 1.5em;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-top: 0.4em;
  color: #CFDBEA;
  line-height: 1.85;
}

.article-body li::marker {
  color: var(--brand);
}

.article-body ul li::marker {
  color: var(--amber);
}

.article-body blockquote {
  margin: 1.6em 0;
  padding: 16px 20px 16px 26px;
  background: rgba(255, 255, 255, 0.025);
  border-left: 3px solid var(--brand);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-2);
}

.article-body blockquote p {
  color: var(--text-2);
  margin: 0;
}

.article-body img {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  width: auto;
  height: auto;
}

.article-body figure {
  margin: 1.8em 0;
}

.article-body figcaption {
  margin-top: 12px;
  text-align: center;
  font-size: 13px;
  color: var(--text-3);
}

.article-body code {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 6px;
  font-size: 0.9em;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color: var(--amber);
}

.article-body pre {
  background: #0A0F1A;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  line-height: 1.7;
}

.article-body pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text-2);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  display: block;
  overflow-x: auto;
}

.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.6;
}

.article-body th {
  background: var(--surface-2);
  color: var(--text-1);
  font-weight: 650;
  text-align: left;
}

.article-body td {
  color: var(--text-2);
  background: transparent;
}

/* 正文结束提示 */
.article-guide-card {
  margin: 2.2em auto 0;
  max-width: 720px;
  background: rgba(57, 217, 192, 0.07);
  border: 1px solid rgba(57, 217, 192, 0.2);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  flex-wrap: wrap;
}

.article-guide-card h2 {
  font-size: 18px;
  color: var(--text-1);
  font-weight: 700;
  margin: 0;
  border: none;
  padding: 0;
}

.article-guide-card p {
  margin: 6px 0 0;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.6;
}

/* ---------- 空态 ---------- */
.missing-card {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 100px 20px;
}

.missing-card__icon {
  width: 88px;
  height: 88px;
  margin: 0 auto 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-3);
}

.missing-card__icon svg {
  width: 38px;
  height: 38px;
}

.missing-card h1 {
  font-size: 26px;
  font-weight: 750;
  color: var(--text-1);
  margin: 0 0 14px;
  letter-spacing: 0.02em;
}

.missing-card p {
  color: var(--text-2);
  margin: 0 0 28px;
}

/* ---------- 延伸阅读 ---------- */
.article-extra {
  padding: 18px 0 36px;
  border-bottom: 1px solid var(--border);
}

.article-extra__head {
  max-width: 860px;
  margin: 0 auto 30px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.article-extra__head h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 750;
  color: var(--text-1);
}

.article-extra__head p {
  font-size: 14px;
  color: var(--text-2);
  margin: 0;
}

.extra-grid {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.extra-card {
  position: relative;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px 22px;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--ease), transform var(--ease), box-shadow var(--ease), background var(--ease);
}

.extra-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 28px;
  right: 28px;
  height: 1px;
  background: linear-gradient(90deg, rgba(57, 217, 192, 0.5), transparent);
  opacity: 0;
  transition: opacity var(--ease);
}

.extra-card:hover {
  border-color: rgba(57, 217, 192, 0.26);
  background: var(--surface-3);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.extra-card:hover::after {
  opacity: 1;
}

.extra-card__tag {
  font-size: 12px;
  color: var(--brand);
  font-weight: 650;
  letter-spacing: 0.06em;
}

.extra-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-1);
  margin: 10px 0 8px;
  line-height: 1.4;
}

.extra-card p {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.7;
  flex: 1 0 auto;
  margin: 0 0 18px;
}

.extra-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 600;
}

.extra-card__link svg {
  width: 15px;
  height: 15px;
  transition: transform var(--ease);
}

.extra-card__link:hover svg {
  transform: translateX(4px);
}

/* ---------- 页脚 ---------- */
.footer {
  position: relative;
  z-index: 3;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 64px 0 30px;
  margin-top: 44px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--border);
}

.footer-brand p {
  margin-top: 20px;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.8;
  max-width: 310px;
}

.footer h4 {
  color: var(--text-1);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 22px;
}

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

.footer-links a {
  color: var(--text-2);
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--brand);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 26px;
  font-size: 13px;
  color: var(--text-3);
}

.footer-bottom p {
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .site-nav {
    margin-left: 24px;
  }

  .site-nav .nav-link {
    padding-left: 9px;
    padding-right: 9px;
    font-size: 14px;
  }

  :root {
    --section-gap: 80px;
  }
}

@media (max-width: 920px) {
  .site-header {
    background: rgba(11, 15, 26, 0.86);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(86vw, 360px);
    margin: 0;
    padding: 84px 36px 40px;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    background: rgba(13, 19, 35, 0.97);
    border-left: 1px solid var(--border-light);
    box-shadow: -20px 0 50px rgba(0, 0, 0, 0.5);
    transform: translateX(108%);
    visibility: hidden;
    transition: transform 0.3s ease, visibility 0.3s;
    flex-wrap: wrap;
    overflow-y: auto;
  }

  .site-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .site-nav .nav-link {
    font-size: 17px;
    font-weight: 650;
    color: var(--text-1);
    padding: 15px 10px;
    border-radius: 10px;
  }

  .site-nav .nav-link::after {
    display: none;
  }

  .site-nav .nav-link.active {
    background: rgba(57, 217, 192, 0.1);
    color: var(--brand);
  }

  .nav-close {
    display: inline-flex;
    position: absolute;
    top: 12px;
    right: 12px;
  }

  .site-nav.is-open .nav-close {
    display: inline-flex;
  }

  .burger {
    display: inline-flex;
    margin-left: 2px;
  }

  .header-cta {
    display: inline-flex;
    height: 40px;
    padding: 0 14px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 38px;
  }

  .extra-grid {
    grid-template-columns: 1fr;
    max-width: 640px;
  }
}

@media (max-width: 620px) {
  :root {
    --section-gap: 56px;
  }

  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  .brand-sub {
    display: none;
  }

  .header-actions {
    gap: 8px;
  }

  .header-cta {
    font-size: 0;
    width: 40px;
    padding: 0;
    justify-content: center;
  }

  .header-cta svg {
    width: 18px;
    height: 18px;
    margin: 0;
  }

  .article-hero {
    min-height: 340px;
    padding-top: 112px;
    padding-bottom: 36px;
  }

  .article-hero__content h1 {
    font-size: 28px;
  }

  .article-hero__excerpt {
    font-size: 15px;
    padding-right: 0;
  }

  .article-paper {
    padding: 24px 20px;
    border-radius: 14px;
  }

  .article-body {
    font-size: 15px;
  }

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

  .article-meta {
    gap: 8px 14px;
  }

  .article-guide-card {
    padding: 20px;
  }

  .article-guide-card .btn {
    width: 100%;
  }

  .extra-card {
    min-height: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 420px) {
  .brand-line {
    font-size: 16px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .site-nav {
    padding-left: 24px;
    padding-right: 24px;
  }
}

/* roulang page: category2 */
:root {
  --bg: #0B0F1A;
  --bg-soft: #0F1624;
  --surface: #121A29;
  --surface-raised: #182334;
  --line: rgba(255, 255, 255, 0.08);
  --text-main: #F2F6FC;
  --text-muted: #9AAAC0;
  --text-dim: #64748B;
  --cyan: #39D9C0;
  --cyan-bright: #64EDD6;
  --gold: #F2C25C;
  --danger: #EF6262;
  --success: #4CC38A;
  --radius-card: 14px;
  --radius-box: 12px;
  --radius-btn: 8px;
  --max-width: 1140px;
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
  --header-height: 64px;
  --section-space: 96px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 78% 12%, rgba(242, 194, 92, 0.05), transparent 360px),
    radial-gradient(circle at 12% 38%, rgba(57, 217, 192, 0.06), transparent 420px),
    radial-gradient(circle at 88% 75%, rgba(57, 217, 192, 0.04), transparent 520px);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: -80px auto auto -80px;
  width: 180px;
  height: 180px;
  background:
    radial-gradient(2px 2px at 22px 34px, rgba(255, 255, 255, 0.5) 50%, transparent 51%),
    radial-gradient(1px 1px at 90px 12px, rgba(255, 255, 255, 0.32) 50%, transparent 51%),
    radial-gradient(1px 1px at 150px 70px, rgba(255, 255, 255, 0.24) 50%, transparent 51%);
  background-repeat: repeat;
  background-size: 190px 190px;
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
}

html, body {
  max-width: 100%;
  overflow-x: hidden;
}

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ol, ul {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  border: 0;
  background: none;
  color: inherit;
  cursor: pointer;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(57, 217, 192, 0.55);
  outline-offset: 3px;
  border-radius: var(--radius-btn);
}

::selection {
  background: rgba(57, 217, 192, 0.25);
  color: #fff;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section, header, footer {
  position: relative;
}

main {
  position: relative;
  z-index: 1;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 100;
  transition: background-color 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(11, 15, 26, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  min-width: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(57, 217, 192, 0.45);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--cyan);
  background: rgba(57, 217, 192, 0.08);
}

.brand-mark svg {
  width: 20px;
  height: 20px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.brand-line {
  color: var(--text-main);
  font-weight: 700;
  font-size: 17px;
}

.brand-sub {
  color: var(--text-dim);
  font-size: 12px;
  letter-spacing: 0.15em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: 8px;
  flex-wrap: nowrap;
}

.nav-link {
  position: relative;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  padding: 6px 0;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav-link:hover {
  color: var(--text-main);
}

.nav-link.active {
  color: var(--cyan);
}

.nav-link.active::after,
.nav-link:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
  flex-shrink: 0;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-btn);
  background: var(--cyan);
  color: #071018;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.header-cta svg {
  width: 16px;
  height: 16px;
}

.header-cta:hover {
  background: var(--cyan-bright);
  box-shadow: 0 0 22px rgba(57, 217, 192, 0.3);
}

.header-cta:active {
  transform: translateY(1px);
}

.burger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
}

.burger svg {
  width: 20px;
  height: 20px;
}

.burger:hover {
  border-color: rgba(57, 217, 192, 0.4);
  color: var(--cyan);
}

/* Mobile drawer */
.mobile-drawer {
  position: fixed;
  inset: 0;
  background: rgba(7, 10, 17, 0.97);
  z-index: 200;
  display: flex;
  flex-direction: column;
  padding: 26px 24px 36px;
  transform: translateX(102%);
  transition: transform 0.32s ease;
  opacity: 0;
  visibility: hidden;
  overflow-y: auto;
}

.mobile-drawer.is-open {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
}

.mobile-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 26px;
}

.mobile-drawer-close {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text-muted);
}

.mobile-drawer-close:hover {
  color: var(--cyan);
  border-color: rgba(57, 217, 192, 0.4);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
}

.mobile-nav-links a {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: #d6deeb;
  font-size: 18px;
  font-weight: 600;
}

.mobile-nav-links a.active,
.mobile-nav-links a:hover {
  color: var(--cyan);
}

.mobile-drawer-note {
  margin-top: 28px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text-muted);
  font-size: 14px;
}

.mobile-drawer-cta {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  border-radius: var(--radius-btn);
  background: var(--cyan);
  color: #071018;
  font-weight: 700;
  font-size: 15px;
}

/* ---------- Hero ---------- */
.cat-hero {
  padding: calc(var(--header-height) + 76px) 0 84px;
  overflow: hidden;
}

.cat-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  border-radius: 0 0 40px 0;
  opacity: 0.34;
}

.cat-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-color: rgba(11, 15, 26, 0.3);
}

.cat-hero .container {
  position: relative;
  z-index: 2;
}

.cat-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 48px;
  align-items: end;
}

.cat-hero-copy {
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 13px;
  margin-bottom: 16px;
}

.hero-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold);
}

.cat-hero h1 {
  color: var(--text-main);
  font-size: 42px;
  line-height: 1.25;
  letter-spacing: 0.01em;
  font-weight: 800;
  margin-bottom: 18px;
}

.cat-hero h1 .text-mark {
  color: var(--cyan);
}

.cat-hero-lead {
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.85;
  max-width: 640px;
  margin-bottom: 24px;
}

.cat-hero-lead strong {
  color: #e8f3ff;
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 9px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 30px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 26, 41, 0.25);
  color: #c8d4e5;
  font-size: 12px;
}

.hero-tag::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

.hero-visual {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-card);
  background: var(--surface);
}

.hero-visual img {
  width: 100%;
  height: auto;
  min-height: 260px;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.hero-visual-note {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 13px;
  border-radius: 10px;
  background: rgba(7, 10, 17, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #d9e3f0;
  font-size: 13px;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.hero-visual-note svg {
  width: 16px;
  height: 16px;
  color: var(--cyan);
  flex-shrink: 0;
}

/* ---------- Buttons ---------- */
.btn-primary,
.btn-ghost,
.btn-soft {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 48px;
  padding: 0 22px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 700;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--cyan);
  color: #071018;
}

.btn-primary:hover {
  background: var(--cyan-bright);
  box-shadow: 0 6px 24px rgba(57, 217, 192, 0.28);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.36);
  color: #e8f0fa;
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.btn-ghost:active {
  transform: translateY(1px);
}

.btn-soft {
  background: rgba(57, 217, 192, 0.1);
  border: 1px solid rgba(57, 217, 192, 0.24);
  color: var(--cyan);
  height: 44px;
  padding: 0 18px;
  font-size: 14px;
}

.btn-soft:hover {
  background: rgba(57, 217, 192, 0.17);
  border-color: var(--cyan);
}

/* ---------- Section ---------- */
.section {
  padding: var(--section-space) 0;
}

.section-soft {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  display: flex;
  flex-direction: column;
  margin-bottom: 42px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: 13px;
  margin-bottom: 14px;
}

.section-kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--gold);
  transform: rotate(45deg);
}

.section-title {
  color: var(--text-main);
  font-size: 32px;
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-desc {
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 780px;
  font-size: 16px;
}

/* ---------- Download client grid ---------- */
.client-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.client-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 0 0 22px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.client-card:hover {
  transform: translateY(-5px);
  border-color: rgba(57, 217, 192, 0.42);
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.28);
}

.client-card-cover {
  overflow: hidden;
}

.client-card-cover img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.client-card:hover .client-card-cover img {
  transform: scale(1.04);
}

.client-body {
  padding: 18px 18px 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.client-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.client-os {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  display: grid;
  place-items: center;
  color: var(--cyan);
  font-weight: 800;
  font-size: 15px;
}

.client-os svg {
  width: 18px;
  height: 18px;
}

.client-card h3 {
  color: var(--text-main);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.client-card-desc {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.client-note-list {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  margin-top: auto;
}

.client-note-list li {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.6;
  padding-left: 18px;
  position: relative;
  margin-bottom: 7px;
}

.client-note-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.client-note-list li.suppress::before {
  background: var(--text-dim);
}

.client-card .btn-wrap {
  padding: 14px 18px 0;
}

.client-card > .btn-wrap .btn-soft {
  width: 100%;
}

.version-chip {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 9px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 12px;
}

/* ---------- Guide board ---------- */
.download-tip {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding: 16px 18px;
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.download-tip svg {
  width: 22px;
  height: 22px;
  color: var(--gold);
  flex-shrink: 0;
}

.download-tip p {
  color: var(--text-muted);
  font-size: 14px;
  flex: 1;
  min-width: 220px;
}

/* ---------- Steps ---------- */
.steps-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 42px;
  align-items: center;
}

.steps-content {
  max-width: 620px;
}

.steps-list {
  margin-top: 28px;
  display: grid;
  gap: 0;
}

.step-item {
  position: relative;
  padding: 0 0 26px 44px;
  counter-increment: step-counter;
}

.step-item::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 2px;
  width: 30px;
  height: 30px;
  border: 1px solid rgba(57, 217, 192, 0.5);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--cyan);
  font-weight: 700;
  font-size: 14px;
  background: rgba(57, 217, 192, 0.08);
}

.step-item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 34px;
  bottom: 4px;
  width: 1px;
  background: var(--line);
}

.steps-list {
  counter-reset: step-counter;
}

.step-item h3 {
  color: var(--text-main);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 7px;
}

.step-item p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.75;
  max-width: 460px;
}

.steps-visual {
  position: relative;
  max-width: 420px;
}

.steps-visual img {
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  aspect-ratio: 5/4;
  object-fit: cover;
}

.steps-visual-caption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  right: 14px;
  padding: 9px 13px;
  background: rgba(7, 10, 17, 0.82);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: #dce6f2;
  font-size: 13px;
}

/* ---------- Requirement ---------- */
.requirement-wrap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.requirement-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 26px 24px;
}

.requirement-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.requirement-head-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(57, 217, 192, 0.09);
  color: var(--cyan);
  border: 1px solid rgba(57, 217, 192, 0.15);
}

.requirement-head-icon svg {
  width: 22px;
  height: 22px;
}

.requirement-card h3 {
  color: var(--text-main);
  font-size: 20px;
}

.requirement-card h3 span {
  display: inline-block;
  margin-left: 10px;
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 500;
}

.req-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.req-list li {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 14px;
}

.req-list dt {
  color: var(--text-muted);
  font-weight: 500;
  min-width: 76px;
}

.req-list dd {
  text-align: right;
  color: #dce6f2;
  font-weight: 500;
}

.req-list dd .badge {
  margin-left: 6px;
}

.badge {
  display: inline-block;
  height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  background: rgba(76, 195, 138, 0.12);
  border: 1px solid rgba(76, 195, 138, 0.28);
  color: var(--success);
  font-size: 12px;
  line-height: 20px;
  font-weight: 600;
}

.badge.dim {
  background: rgba(100, 116, 139, 0.12);
  border-color: rgba(100, 116, 139, 0.25);
  color: var(--text-dim);
}

.match-line {
  margin-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 24px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
}

.match-line p {
  color: var(--text-muted);
  font-size: 14px;
}

.match-line p strong {
  color: #e7eff9;
}

.match-line .btn-ghost {
  flex-shrink: 0;
}

/* ---------- Account / login note ---------- */
.account-strip {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 42px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 34px 36px;
  overflow: hidden;
  position: relative;
}

.account-strip::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -70px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 194, 92, 0.16), transparent 70%);
}

.account-copy h2 {
  color: var(--text-main);
  font-size: 28px;
  line-height: 1.35;
  margin-bottom: 14px;
}

.account-copy p {
  color: var(--text-muted);
  margin-bottom: 14px;
  max-width: 560px;
}

.account-feature-list li {
  display: flex;
  gap: 10px;
  color: var(--text-muted);
  font-size: 15px;
  padding: 6px 0;
}

.account-feature-list li svg {
  width: 19px;
  height: 19px;
  flex-shrink: 0;
  color: var(--cyan);
  margin-top: 3px;
}

.account-strip .btn-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 17px;
}

.account-thumb {
  border-radius: 16px;
  border: 1px solid var(--line);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.account-thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- Security / version table ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.spec-table th {
  color: #e4ecf6;
  text-align: left;
  font-size: 14px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--line);
  font-weight: 700;
}

.spec-table td {
  color: var(--text-muted);
  font-size: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
}

.spec-table td:first-child {
  color: #d9e4f0;
  font-weight: 600;
}

.spec-table tr:last-child td {
  border-bottom: 0;
}

.table-note {
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 14px;
}

/* ---------- FAQ ---------- */
.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 4px 22px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.faq-item[open] {
  background: rgba(18, 26, 41, 0.9);
  border-color: rgba(57, 217, 192, 0.3);
}

.faq-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 22px;
  cursor: pointer;
  padding: 18px 0;
  list-style: none;
  color: #e9f0f9;
  font-size: 16px;
  font-weight: 650;
  user-select: none;
}

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

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--cyan);
  font-size: 19px;
  font-weight: 400;
  transition: transform 0.25s ease, background 0.2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: rgba(57, 217, 192, 0.12);
  border-color: rgba(57, 217, 192, 0.4);
}

.faq-answer {
  padding: 0 0 22px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.faq-more {
  margin-top: 26px;
  text-align: center;
}

/* ---------- Final CTA ---------- */
.final-cta {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.final-cta-panel {
  position: relative;
  padding: 10px 0;
}

.final-cta-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-2.png");
  background-size: cover;
  background-position: center;
  opacity: 0.28;
  border-radius: 24px;
}

.final-cta-inner {
  position: relative;
  z-index: 1;
  background: rgba(11, 15, 26, 0.68);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 18px;
  padding: 54px 48px;
  text-align: center;
}

.final-cta-inner h2 {
  color: var(--text-main);
  font-size: 32px;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 14px;
}

.final-cta-inner h2 span {
  color: var(--gold);
}

.final-cta-inner p {
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 26px;
}

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

.real-path-note {
  margin-top: 20px;
  color: var(--text-dim);
  font-size: 13px;
}

/* ---------- Footer ---------- */
.footer {
  background: #080C13;
  border-top: 1px solid var(--line);
  padding: 64px 0 26px;
  margin-top: var(--section-space);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: 42px 32px;
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-brand p {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 14px;
  max-width: 260px;
  line-height: 1.75;
}

.footer h4 {
  color: #e0e9f4;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 14px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-links a:hover {
  color: var(--cyan);
  transform: translateX(3px);
}

.footer-bottom {
  margin-top: 38px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 13px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1023px) {
  :root {
    --section-space: 72px;
  }

  .site-nav {
    display: none;
  }

  .burger {
    display: inline-flex;
  }

  .client-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cat-hero-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 32px;
  }

  .steps-wrap {
    grid-template-columns: 1fr;
  }

  .steps-visual {
    max-width: 100%;
  }

  .account-strip {
    grid-template-columns: 1fr;
    padding: 30px 26px;
  }

  .requirement-wrap {
    gap: 16px;
  }

  .requirement-card {
    padding: 22px 20px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  :root {
    --section-space: 56px;
  }

  .container {
    padding: 0 20px;
  }

  .header-inner {
    gap: 14px;
  }

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

  .header-cta svg {
    width: 14px;
    height: 14px;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
  }

  .brand-line {
    font-size: 15px;
  }

  .cat-hero {
    padding: calc(var(--header-height) + 50px) 0 60px;
  }

  .cat-hero-grid {
    grid-template-columns: 1fr;
  }

  .cat-hero h1 {
    font-size: 30px;
  }

  .cat-hero-lead {
    font-size: 15px;
  }

  .hero-visual {
    max-width: 100%;
    order: 2;
  }

  .section-soft,
  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 25px;
  }

  .section-desc {
    font-size: 15px;
  }

  .client-grid {
    grid-template-columns: 1fr;
  }

  .client-card-cover img {
    aspect-ratio: 21 / 9;
  }

  .steps-list .step-item {
    padding-left: 42px;
  }

  .step-item {
    padding-bottom: 24px;
  }

  .requirement-wrap {
    grid-template-columns: 1fr;
  }

  .req-list li {
    flex-direction: column;
    gap: 2px;
  }

  .req-list dd {
    text-align: left;
  }

  .match-line {
    flex-direction: column;
    align-items: flex-start;
  }

  .account-strip {
    padding: 24px 18px;
  }

  .account-copy h2 {
    font-size: 22px;
  }

  .final-cta-inner {
    padding: 36px 20px;
  }

  .final-cta-inner h2 {
    font-size: 24px;
  }

  .footer {
    padding-top: 48px;
  }

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

  .footer-brand p {
    max-width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: left;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .header-inner {
    gap: 10px;
  }

  .header-cta {
    width: 44px;
    height: 44px;
    padding: 0;
    justify-content: center;
    font-size: 0;
  }

  .header-cta svg {
    width: 20px;
    height: 20px;
    margin: 0;
  }

  .brand-sub {
    display: none;
  }

  .cat-hero h1 {
    font-size: 27px;
  }

  .hero-actions,
  .final-cta-inner .btn-wrap {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions a,
  .final-cta-inner .btn-wrap a {
    width: 100%;
  }

  .account-feature-list li {
    align-items: flex-start;
  }

  .final-cta-inner {
    padding: 32px 16px;
  }

  .table-wrap {
    margin-left: -16px;
    margin-right: -16px;
    border-left: 0;
    border-right: 0;
    border-radius: 0;
  }
}