/* roulang page: index */
:root{
  --bg:#060B17;
  --bg-deep:#050913;
  --panel:#0B1324;
  --panel-alt:#091120;
  --primary:#3D7FFF;
  --cyan:#47D1FF;
  --amber:#FFC857;
  --text:#EBF2FF;
  --text2:#A6B4D0;
  --muted:#7285A8;
  --line:rgba(151,181,255,.12);
  --glass:rgba(13,21,41,.72);
  --glass-border:rgba(151,181,255,.16);
  --green:#3FC89B;
  --warning:#F59E0B;
  --red:#F26B6B;
  --radius:18px;
  --radius-sm:14px;
  --radius-xs:8px;
  --shadow:0 20px 50px rgba(1,5,15,.35);
  --font:"PingFang SC","Microsoft YaHei UI","Noto Sans SC","Helvetica Neue",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer}
a:focus-visible,button:focus-visible,.nav-chip:focus-visible,.btn:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.main{
  overflow:hidden;
}
.section{
  padding:96px 0;
}
.section-alt{
  background:var(--panel-alt);
}
.section-head{
  max-width:760px;
  margin-bottom:48px;
}
.section-head .overline,
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--cyan);
  background:rgba(71,209,255,.08);
  border:1px solid rgba(71,209,255,.28);
  border-radius:1000px;
  padding:5px 14px;
  margin-bottom:16px;
  font-weight:600;
}
.section-title{
  font-size:32px;
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
}
.section-sub{
  color:var(--text2);
  font-size:16px;
  margin-top:14px;
}
.lead{
  color:var(--text2);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:600;
  font-size:15px;
  line-height:1.2;
  border-radius:var(--radius-xs);
  padding:13px 22px;
  border:1px solid transparent;
  background:transparent;
  color:var(--text);
  transition:all .25s ease;
  min-height:44px;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),#2B66E6);
  color:#fff;
  border-color:rgba(255,255,255,.10);
  box-shadow:0 0 0 3px rgba(61,127,255,.2),0 8px 24px rgba(61,127,255,.35);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 3px rgba(61,127,255,.32),0 12px 30px rgba(61,127,255,.45);
  background:linear-gradient(135deg,#4D8BFF,#3472F0);
}
.btn-secondary{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(151,181,255,.24);
  color:var(--text);
  backdrop-filter:blur(8px);
}
.btn-secondary:hover{
  background:rgba(255,255,255,.12);
  border-color:rgba(151,181,255,.4);
}
.btn-ghost{
  color:var(--cyan);
  border:1px solid rgba(71,209,255,.3);
  background:rgba(71,209,255,.05);
}
.btn-ghost:hover{
  background:rgba(71,209,255,.12);
}
.btn-sm{
  min-height:38px;
  padding:8px 16px;
  font-size:14px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:4px;
  background:rgba(71,209,255,.08);
  color:var(--cyan);
  border:1px solid rgba(71,209,255,.22);
  border-radius:1000px;
  padding:4px 12px;
  font-size:13px;
  font-weight:500;
}
.tag{
  display:inline-flex;
  align-items:center;
  background:rgba(255,200,87,.1);
  color:var(--amber);
  border:1px solid rgba(255,200,87,.28);
  border-radius:6px;
  font-size:12px;
  font-weight:600;
  padding:3px 10px;
  letter-spacing:.04em;
}
.glass{
  background:var(--glass);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  border-radius:var(--radius);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.08);
}
.arrow{
  display:inline-block;
  transition:transform .2s;
}
a:hover .arrow{transform:translateX(4px)}

/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:999;
  background:rgba(6,11,23,.82);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid rgba(71,209,255,.20);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  padding:14px 24px;
  max-width:1200px;
  margin:0 auto;
}
.brand{
  font-weight:800;
  font-size:20px;
  line-height:1.2;
  letter-spacing:-.02em;
  color:#fff;
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  white-space:nowrap;
}
.brand::before{
  content:"";
  width:28px;
  height:28px;
  border-radius:50%;
  background:radial-gradient(circle at 35% 35%,#fff 0 3px,var(--cyan) 4px 6px,transparent 7px),rgba(61,127,255,.3);
  border:1px solid rgba(71,209,255,.6);
  box-shadow:0 0 16px rgba(61,127,255,.45);
}
.main-nav{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  overflow:visible;
  white-space:nowrap;
}
.nav-chip{
  display:inline-flex;
  align-items:center;
  color:var(--text2);
  font-size:15px;
  font-weight:500;
  padding:9px 17px;
  border-radius:1000px;
  border:1px solid transparent;
  background:transparent;
  transition:all .2s;
}
.nav-chip:hover{
  color:var(--text);
  background:rgba(255,255,255,.08);
}
.nav-chip.active{
  color:#fff;
  background:rgba(61,127,255,.20);
  border-color:rgba(61,127,255,.9);
  box-shadow:0 0 0 4px rgba(61,127,255,.1);
}
.header-cta{
  margin-left:4px;
  flex:0 0 auto;
  background:rgba(61,127,255,.15);
  border:1px solid rgba(61,127,255,.55);
  color:#fff;
}
.header-cta:hover{
  background:rgba(61,127,255,.35);
}

/* hero */
.hero{
  position:relative;
  background:var(--bg);
  padding:88px 0 96px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  z-index:0;
  opacity:.8;
}
.hero-bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,#060B17 0%,rgba(6,11,23,.78) 42%,rgba(6,11,23,.42) 100%),
    linear-gradient(180deg,rgba(6,11,23,.2),rgba(6,11,23,.85));
}
.hero-orbit{
  position:absolute;
  right:-80px;
  top:-80px;
  width:620px;
  height:620px;
  border:1px dashed rgba(71,209,255,.18);
  border-radius:50%;
  pointer-events:none;
}
.hero-orbit::before{
  content:"";
  position:absolute;
  inset:120px;
  border:1px dashed rgba(71,209,255,.12);
  border-radius:50%;
}
.hero-orbit::after{
  content:"";
  position:absolute;
  inset:240px;
  background:radial-gradient(circle,#fff 0 3px,transparent 4px);
  box-shadow:0 0 20px rgba(71,209,255,.9);
}
.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:5fr 7fr;
  align-items:center;
  gap:56px;
}
.hero-copy{
  max-width:580px;
}
.hero-copy h1{
  font-size:42px;
  line-height:1.25;
  font-weight:800;
  letter-spacing:-.02em;
  color:#fff;
  margin:18px 0 20px;
}
.hero-copy h1 span{
  background:linear-gradient(135deg,#fff,var(--cyan));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-copy .lede{
  color:var(--text2);
  font-size:17px;
  line-height:1.85;
  margin-bottom:28px;
}
.hero-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}
.hero-access-wrap{
  position:relative;
  max-width:560px;
  justify-self:end;
  width:100%;
}
.hero-access{
  position:relative;
  padding:34px 32px 30px;
  border-radius:26px;
  overflow:hidden;
}
.hero-access::before{
  content:"";
  position:absolute;
  inset:14px;
  border:1px dashed rgba(71,209,255,.18);
  border-radius:20px;
  pointer-events:none;
}
.access-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:26px;
}
.access-top small{
  color:var(--muted);
  letter-spacing:.06em;
  font-size:12px;
  text-transform:uppercase;
}
.access-mark{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--cyan);
}
.access-mark svg{
  width:18px;
  height:18px;
}
.hero-access h3{
  font-size:23px;
  line-height:1.5;
  font-weight:700;
  margin-bottom:22px;
}
.hero-access .btn-primary{
  width:100%;
  margin-bottom:18px;
}
.access-quick{
  display:grid;
  gap:10px;
}
.access-quick a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px 14px;
  border-radius:10px;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(151,181,255,.12);
  font-size:15px;
  color:var(--text2);
  transition:all .2s;
}
.access-quick a:hover{
  color:#fff;
  background:rgba(61,127,255,.15);
  border-color:rgba(61,127,255,.4);
}
.access-quick .arrow{
  color:var(--cyan);
}

/* services */
.services{
  position:relative;
  background:var(--bg);
}
.services-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  grid-auto-rows:190px;
  gap:20px;
}
.service-card{
  position:relative;
  border-radius:var(--radius);
  background:linear-gradient(145deg,rgba(14,24,45,.88),rgba(9,17,32,.9));
  border:1px solid rgba(151,181,255,.12);
  padding:26px 24px;
  overflow:hidden;
  transition:all .3s;
  display:grid;
}
.service-card:hover{
  transform:translateY(-4px);
  border-color:rgba(61,127,255,.45);
  box-shadow:var(--shadow),0 0 0 1px rgba(71,209,255,.15);
}
.service-card::after{
  content:"";
  position:absolute;
  right:-40px;
  top:-40px;
  width:160px;
  height:160px;
  background:radial-gradient(circle,rgba(71,209,255,.12),transparent 70%);
  pointer-events:none;
}
.service-card--primary{
  grid-column:1 / 3;
  grid-row:span 2;
  padding:0;
  grid-template-columns:1.1fr .9fr;
  background:linear-gradient(140deg,rgba(24,38,70,.88),rgba(8,14,29,.96));
}
.service-card--company{
  grid-column:3 / 4;
  grid-row:1 / 2;
}
.service-card--security{
  grid-column:4 / 5;
  grid-row:1 / 2;
}
.service-card--help{
  grid-column:3 / 5;
  grid-row:2 / 3;
}
.service-card__info{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  justify-content:center;
}
.service-card__info h3{
  font-size:22px;
  font-weight:700;
  margin:14px 0 10px;
  line-height:1.45;
}
.service-card__info p{
  color:var(--text2);
  font-size:15px;
  line-height:1.8;
  max-width:520px;
}
.service-link{
  margin-top:20px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--cyan);
  font-weight:600;
  font-size:15px;
}
.card-label{
  display:inline-flex;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.06em;
  font-weight:600;
}
.service-card__media{
  position:relative;
  min-height:240px;
  width:100%;
}
.service-card__media img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.service-card__media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(8,14,29,.24),rgba(8,14,29,.85) 96%);
}
.icon-dot{
  width:34px;
  height:34px;
  border-radius:10px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:rgba(61,127,255,.14);
  border:1px solid rgba(71,209,255,.32);
  color:var(--cyan);
  font-size:16px;
  font-weight:700;
}

/* stats */
.stats{
  position:relative;
  background:ulr('/assets/images/backpic/back-2.webp'),linear-gradient(135deg,#091A33,#050B1A);
  background-size:cover,cover;
  background-position:center;
  border-top:1px solid rgba(71,209,255,.15);
  border-bottom:1px solid rgba(71,209,255,.15);
}
.stats::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(rgba(71,209,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(71,209,255,.04) 1px,transparent 1px);
  background-size:44px 44px;
  pointer-events:none;
}
.stats-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:36px;
}
.stat-item{
  text-align:center;
  padding:20px 12px;
}
.stat-num{
  font-size:56px;
  font-weight:800;
  letter-spacing:-.03em;
  color:#fff;
  line-height:1.15;
  font-variant-numeric:tabular-nums;
}
.stat-num em{
  font-style:normal;
  color:var(--cyan);
  font-size:30px;
  margin-left:3px;
}
.stat-label{
  color:var(--text2);
  font-size:14px;
  margin-top:10px;
  letter-spacing:.03em;
}
.stat-divider:not(:last-child){
  border-right:1px solid rgba(151,181,255,.14);
}

/* scenario */
.scenarios{
  background:var(--panel);
}
.scenario-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
}
.scenario-list{
  display:grid;
  gap:12px;
}
.scenario-row{
  display:grid;
  grid-template-columns:54px 1fr auto;
  gap:18px;
  align-items:center;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(151,181,255,.1);
  border-radius:16px;
  padding:22px 20px;
  transition:all .25s;
}
.scenario-row:hover{
  background:rgba(61,127,255,.09);
  border-color:rgba(61,127,255,.4);
}
.scenario-num{
  font-size:22px;
  font-weight:700;
  color:rgba(71,209,255,.6);
  font-variant-numeric:tabular-nums;
}
.scenario-row h3{
  font-size:17px;
  color:#fff;
  margin-bottom:4px;
}
.scenario-row p{
  color:var(--text2);
  font-size:14px;
}
.scenario-link{
  color:var(--cyan);
  font-size:14px;
  white-space:nowrap;
}
.scenario-media{
  border-radius:var(--radius);
  overflow:hidden;
  position:relative;
}
.scenario-media img{
  width:100%;
  height:100%;
  min-height:420px;
  object-fit:cover;
}
.scenario-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,11,23,0) 40%,rgba(6,11,23,.6),rgba(6,11,23,.95));
}
.scenario-summary{
  position:absolute;
  left:24px;
  right:24px;
  bottom:20px;
  z-index:2;
}
.scenario-summary h3{
  color:#fff;
  font-size:22px;
  margin-bottom:6px;
  font-weight:700;
}
.scenario-summary p{
  color:rgba(235,242,255,.78);
  font-size:14px;
  margin-bottom:14px;
}

/* steps */
.steps{
  background:var(--bg);
}
.steps-grid{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:16px;
  counter-reset:step;
}
.step-card{
  position:relative;
  background:rgba(13,22,42,.65);
  border:1px solid rgba(151,181,255,.12);
  border-radius:16px;
  padding:24px 20px;
  min-height:240px;
  transition:all .25s;
}
.step-card:hover{
  border-color:rgba(71,209,255,.4);
  background:rgba(61,127,255,.08);
  transform:translateY(-4px);
}
.step-card::before{
  counter-increment:step;
  content:"0" counter(step);
  display:inline-flex;
  width:40px;
  height:40px;
  align-items:center;
  justify-content:center;
  border-radius:8px;
  background:rgba(61,127,255,.13);
  color:var(--cyan);
  font-weight:700;
  font-size:15px;
  margin-bottom:20px;
}
.step-card h3{
  font-size:17px;
  line-height:1.5;
  margin-bottom:8px;
  color:#fff;
}
.step-card p{
  font-size:13px;
  color:var(--text2);
  line-height:1.75;
}
.step-arrow{
  position:absolute;
  top:50%;
  right:-17px;
  color:rgba(71,209,255,.4);
  z-index:2;
}

/* news */
.latest{
  background:var(--panel);
}
.latest-grid{
  display:grid;
  grid-template-columns:7fr 4fr;
  gap:40px;
}
.news-list{
  display:grid;
  gap:14px;
}
.news-empty{
  min-height:160px;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px dashed rgba(151,181,255,.18);
  border-radius:var(--radius);
  background:rgba(255,255,255,.02);
  color:var(--text2);
  font-size:15px;
}
.news-item{
  display:flex;
  flex-direction:column;
  gap:12px;
  background:rgba(255,255,255,.028);
  border:1px solid rgba(151,181,255,.1);
  border-radius:16px;
  padding:22px 22px;
  transition:all .26s;
}
.news-item:hover{
  border-color:rgba(71,209,255,.32);
  background:rgba(61,127,255,.06);
}
.news-meta{
  display:flex;
  gap:12px;
  align-items:center;
  font-size:13px;
  color:var(--muted);
}
.news-item h3{
  font-size:18px;
  line-height:1.6;
  font-weight:700;
}
.news-item h3 a{
  color:var(--text);
}
.news-item h3 a:hover{
  color:var(--cyan);
}
.news-excerpt{
  color:var(--text2);
  font-size:14px;
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.side-card{
  border-radius:var(--radius);
  padding:26px 24px;
  margin-bottom:18px;
}
.side-card h3{
  font-size:18px;
  font-weight:700;
  margin-bottom:18px;
}
.side-links{
  display:grid;
  gap:8px;
}
.side-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  color:var(--text2);
  font-size:15px;
  padding:11px 12px;
  border-radius:10px;
  border:1px solid transparent;
}
.side-links a:hover{
  color:#fff;
  background:rgba(61,127,255,.12);
  border-color:rgba(61,127,255,.26);
}
.side-links .arrow{
  color:var(--cyan);
  opacity:.8;
}
.side-tip{
  background:linear-gradient(145deg,rgba(71,209,255,.1),rgba(61,127,255,.07));
  border:1px solid rgba(71,209,255,.2);
  border-radius:var(--radius);
  padding:22px 20px;
  color:var(--text2);
  font-size:14px;
}
.side-tip strong{
  color:var(--text);
  display:block;
  margin-bottom:4px;
}

/* faq */
.faq-wrap{
  max-width:900px;
  margin:0 auto;
}
.faq-item{
  border:1px solid rgba(151,181,255,.13);
  background:rgba(255,255,255,.03);
  border-radius:14px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s,background .2s;
}
.faq-item.open{
  border-color:rgba(71,209,255,.4);
  background:rgba(61,127,255,.06);
}
.faq-q{
  width:100%;
  text-align:left;
  background:transparent;
  border:none;
  padding:20px 24px;
  color:var(--text);
  font-weight:600;
  font-size:17px;
  display:flex;
  align-items:center;
  gap:16px;
  min-height:60px;
}
.faq-q .plus{
  width:32px;
  height:32px;
  flex:0 0 32px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:9px;
  border:1px solid rgba(71,209,255,.35);
  color:var(--cyan);
  background:rgba(71,209,255,.07);
  font-size:20px;
  transition:transform .25s;
}
.faq-item.open .plus{
  transform:rotate(45deg);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
  color:var(--text2);
  font-size:15px;
  line-height:1.85;
}
.faq-a-inner{
  padding:0 24px 22px 72px;
}

/* cta */
.cta{
  position:relative;
  background:linear-gradient(135deg,rgba(9,17,32,.95),rgba(8,20,48,.8)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;
  background-position:center;
}
.cta-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:36px;
  justify-content:space-between;
}
.cta h2{
  font-size:30px;
  line-height:1.4;
  font-weight:700;
}
.cta p{
  color:var(--text2);
  margin-top:10px;
  max-width:660px;
}
.cta-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}

/* footer */
.site-footer{
  background:var(--bg-deep);
  padding-top:80px;
  border-top:1px solid var(--line);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;
  left:50%;
  top:0;
  transform:translateX(-50%);
  width:900px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(71,209,255,.28),transparent);
}
.footer-huge{
  font-size:96px;
  font-weight:800;
  letter-spacing:-.03em;
  text-align:center;
  color:rgba(255,255,255,.04);
  line-height:1.1;
  margin:-14px 0 20px;
  pointer-events:none;
  user-select:none;
}
.footer-grid{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:40px;
  border-bottom:1px solid rgba(151,181,255,.09);
  padding-bottom:50px;
}
.footer-brand{
  max-width:330px;
}
.footer-brand h2{
  color:#fff;
  font-size:22px;
  font-weight:700;
  margin-bottom:14px;
}
.footer-brand p{
  color:var(--text2);
  font-size:14px;
  line-height:1.8;
}
.footer-col h3{
  font-size:16px;
  color:#fff;
  font-weight:600;
  margin-bottom:18px;
}
.footer-col li{
  margin-bottom:10px;
}
.footer-col a{
  color:var(--text2);
  font-size:14px;
  transition:color .2s;
}
.footer-col a:hover{
  color:var(--cyan);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:15px;
  justify-content:space-between;
  align-items:center;
  padding:22px 0 34px;
  color:var(--muted);
  font-size:13px;
}
.footer-copyright small{
  color:var(--muted);
}
.footer-contact{
  color:var(--text2);
  font-size:14px;
  line-height:1.9;
}
.footer-contact strong{
  color:var(--text);
}

/* responsive */
@media(max-width:1024px){
  .header-inner{gap:14px}
  .brand{font-size:18px}
  .nav-chip{padding:7px 12px;font-size:14px}
  .hero{padding:64px 0 76px}
  .hero-inner{grid-template-columns:1fr;gap:38px}
  .hero-copy{max-width:100%}
  .hero-access-wrap{max-width:100%;justify-self:stretch}
  .services-grid{grid-auto-rows:170px;grid-template-columns:repeat(2,1fr)}
  .service-card--primary{grid-column:1/3;grid-row:span 2}
  .service-card--company{grid-column:1/2;grid-row:auto}
  .service-card--security{grid-column:2/3;grid-row:auto}
  .service-card--help{grid-column:1/3;grid-row:auto}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid .stat-divider:nth-child(2){border-right:none}
  .scenario-grid{grid-template-columns:1fr;gap:30px}
  .scenario-media img{min-height:300px}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .step-card{min-height:0}
  .latest-grid{grid-template-columns:1fr}
  .section{padding:72px 0}
  .footer-huge{font-size:72px}
}
@media(max-width:767px){
  body{font-size:15px}
  .section{padding:52px 0}
  .section-title{font-size:27px}
  .header-inner{flex-wrap:wrap;padding:10px 16px;gap:8px 12px}
  .brand{font-size:16px}
  .brand::before{width:24px;height:24px}
  .main-nav{
    order:3;width:100%;
    overflow-x:auto;gap:6px;
    padding:4px 0 2px;
    margin-left:-4px;
    scrollbar-width:none;
  }
  .main-nav::-webkit-scrollbar{display:none}
  .nav-chip{flex:0 0 auto;padding:8px 14px;font-size:14px}
  .header-cta{margin-left:auto;padding:10px 14px;font-size:13px}
  .hero{padding:40px 0 58px}
  .hero-copy h1{font-size:30px;letter-spacing:-.01em}
  .hero-copy .lede{font-size:15px}
  .btn{padding:11px 18px;font-size:14px}
  .hero-access{padding:24px 20px}
  .hero-access h3{font-size:20px}
  .access-top{gap:10px;flex-direction:column;align-items:flex-start}
  .services-grid{display:flex;flex-direction:column;gap:16px}
  .service-card{display:block;min-height:auto;grid-column:auto!important;grid-row:auto!important}
  .service-card--primary{display:grid;grid-template-columns:1fr;padding:0}
  .service-card--primary .service-card__info{padding:26px 24px}
  .service-card__media{height:180px;order:-1}
  .service-card__media img{position:relative;height:180px}
  .service-card__media::after{background:rgba(8,14,29,.2)}
  .stats-grid{grid-template-columns:1fr 1fr;gap:28px 8px}
  .stat-num{font-size:40px}
  .scenario-media img{min-height:240px}
  .scenario-row{grid-template-columns:40px 1fr;gap:10px;padding:16px 14px}
  .scenario-link{display:none}
  .steps-grid{grid-template-columns:1fr;gap:12px}
  .step-arrow{display:none}
  .footer-huge{font-size:44px}
  .footer-grid{gap:28px;flex-direction:column}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category1 */
:root{
  --bg-base:#060B17;
  --bg-soft:#091120;
  --bg-panel:#0B1324;
  --primary:#3D7FFF;
  --sky:#47D1FF;
  --accent:#FFC857;
  --text-primary:#EBF2FF;
  --text-secondary:#A6B4D0;
  --text-weak:#7285A8;
  --line:rgba(151,181,255,.12);
  --success:#3FC89B;
  --warning:#F59E0B;
  --danger:#F26B6B;
  --radius-lg:18px;
  --radius:14px;
  --radius-sm:8px;
  --shadow-glass:0 20px 50px rgba(1,5,15,.35), inset 0 1px 0 rgba(255,255,255,.08);
  --shadow-btn:0 0 0 3px rgba(61,127,255,.2), 0 8px 24px rgba(61,127,255,.35);
  --font-main:"PingFang SC","Microsoft YaHei UI","Noto Sans SC","Helvetica Neue",sans-serif;
  --font-num:Inter,"PingFang SC","Microsoft YaHei UI",sans-serif;
  --space-section:96px;
}
*{
  box-sizing:border-box;
}
html{
  scroll-behavior:smooth;
  scroll-padding-top:92px;
}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-primary);
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body,a,button,input,textarea,select{
  font-family:var(--font-main);
}
img{
  display:block;
  max-width:100%;
}
a{
  color:inherit;
  text-decoration:none;
}
ul,ol{
  margin:0;
  padding:0;
}
li{
  list-style:none;
}
h1,h2,h3,h4,p{
  margin:0;
}
button{
  border:0;
  background:none;
  color:inherit;
  cursor:pointer;
}
.container{
  width:min(1200px, calc(100% - 48px));
  margin:0 auto;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--sky);
  font-size:13px;
  letter-spacing:.12em;
  font-weight:600;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--sky),transparent);
}
.chip{
  display:inline-flex;
  align-items:center;
  border-radius:999px;
  border:1px solid rgba(71,209,255,.28);
  background:rgba(71,209,255,.08);
  color:var(--sky);
  font-size:13px;
  padding:6px 14px;
  line-height:1.4;
  width:max-content;
}
.badge{
  display:inline-flex;
  align-items:center;
  border-radius:var(--radius-sm);
  padding:4px 10px;
  background:rgba(255,200,87,.12);
  border:1px solid rgba(255,200,87,.22);
  color:var(--accent);
  font-size:12px;
  line-height:1.5;
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--primary);
  font-weight:600;
  font-size:15px;
  transition:gap .25s ease, color .2s ease, text-shadow .2s ease;
}
.text-link::after{
  content:"→";
  transition:transform .2s ease;
}
.text-link:hover{
  color:var(--sky);
}
.text-link:hover::after{
  transform:translateX(4px);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  padding:12px 20px;
  font-size:15px;
  font-weight:600;
  line-height:1.5;
  outline:none;
  transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
  cursor:pointer;
  min-height:44px;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),#2E6CFF);
  color:#fff;
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 4px rgba(61,127,255,.24), 0 14px 30px rgba(61,127,255,.42);
}
.btn-primary:active{
  transform:translateY(0) scale(.98);
  box-shadow:0 0 0 3px rgba(61,127,255,.2), 0 6px 16px rgba(61,127,255,.3);
}
.btn-primary:focus-visible,
.btn-ghost:focus-visible,
.nav-chip:focus-visible{
  outline:2px solid var(--sky);
  outline-offset:3px;
}
.btn-ghost{
  background:rgba(255,255,255,.06);
  border-color:rgba(153,191,255,.18);
  color:var(--text-primary);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.12);
  border-color:rgba(71,209,255,.45);
  transform:translateY(-2px);
}
.btn-ghost:active{
  transform:translateY(0);
}
.btn-block{
  width:100%;
  justify-content:center;
}
.btn-sm{
  padding:8px 14px;
  min-height:40px;
  font-size:14px;
}
.glass-card{
  background:linear-gradient(145deg, rgba(255,255,255,.09), rgba(255,255,255,.035));
  border:1px solid rgba(151,181,255,.14);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-glass);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
}
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  border-bottom:1px solid rgba(71,209,255,.14);
  background:rgba(6,11,23,.82);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:74px;
}
.brand{
  color:var(--text-primary);
  font-size:19px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  position:relative;
  padding-bottom:6px;
}
.brand::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:38px;
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--sky));
  border-radius:2px;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
  flex-wrap:nowrap;
}
.main-nav::-webkit-scrollbar{
  display:none;
}
.nav-chip{
  flex:0 0 auto;
  border:1px solid transparent;
  width:max-content;
  background:transparent;
  border-radius:999px;
  padding:9px 16px;
  font-size:14px;
  font-weight:500;
  color:var(--text-secondary);
  transition:background .2s ease, color .2s ease, border-color .2s ease;
}
.nav-chip:hover{
  background:rgba(255,255,255,.07);
  color:var(--text-primary);
}
.nav-chip.active{
  background:linear-gradient(145deg, rgba(61,127,255,.22), rgba(61,127,255,.08));
  border-color:rgba(61,127,255,.55);
  color:#fff;
  box-shadow:0 0 0 3px rgba(61,127,255,.08);
}
.header-cta{
  flex:0 0 auto;
  margin-left:6px;
}
.hero{
  position:relative;
  overflow:hidden;
  color:var(--text-primary);
  background:
    radial-gradient(circle at 82% 15%, rgba(71,209,255,.14), transparent 34%),
    radial-gradient(circle at 12% 82%, rgba(61,127,255,.10), transparent 30%),
    linear-gradient(183deg, rgba(6,11,23,.78), rgba(9,17,32,.94)),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(151,181,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(151,181,255,.055) 1px, transparent 1px);
  background-size:72px 72px;
  mask-image:linear-gradient(to right, transparent 4%, #000 22%, #000 68%, transparent 96%);
  -webkit-mask-image:linear-gradient(to right, transparent 4%, #000 22%, #000 68%, transparent 96%);
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:64px;
  align-items:center;
  padding:94px 0 104px;
}
.hero-copy{
  max-width:520px;
}
.hero-copy .chip{
  margin-bottom:22px;
}
.hero h1{
  font-size:34px;
  font-weight:700;
  line-height:1.3;
  letter-spacing:.01em;
  text-wrap:balance;
}
.hero h1 span{
  display:block;
  background:linear-gradient(90deg, #fff, var(--sky));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  margin-top:20px;
  font-size:16px;
  line-height:1.9;
  color:var(--text-secondary);
}
.hero-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  margin-top:30px;
}
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  gap:10px 26px;
  margin-top:34px;
  padding-top:24px;
  border-top:1px solid var(--line);
  color:var(--text-weak);
}
.hero-trust span{
  position:relative;
  padding-left:16px;
  font-size:13px;
}
.hero-trust span::before{
  content:"";
  position:absolute;
  left:0;
  top:.68em;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--sky);
  box-shadow:0 0 10px rgba(71,209,255,.8);
}
.hero-panel{
  position:relative;
  padding:32px;
  border-radius:var(--radius-lg);
}
.panel-orbit{
  position:absolute;
  right:-86px;
  top:-80px;
  width:240px;
  height:240px;
  border:1px dashed rgba(71,209,255,.28);
  border-radius:50%;
  pointer-events:none;
}
.panel-orbit::after{
  content:"";
  position:absolute;
  right:34px;
  top:34px;
  width:170px;
  height:170px;
  border:1px solid rgba(151,181,255,.18);
  border-radius:50%;
}
.panel-kicker{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--sky);
  font-weight:600;
  margin-bottom:18px;
}
.status-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--success);
  box-shadow:0 0 12px rgba(63,200,155,.9);
}
.hero-panel h2{
  font-size:22px;
  line-height:1.5;
  font-weight:700;
}
.panel-desc{
  color:var(--text-secondary);
  font-size:14px;
  margin-top:10px;
  line-height:1.7;
}
.panel-btn-group{
  margin-top:24px;
  display:grid;
  gap:10px;
}
.panel-links{
  display:grid;
  gap:2px;
  margin-top:22px;
  border-top:1px solid var(--line);
  padding-top:10px;
}
.panel-links a{
  display:flex;
  align-items:center;
  gap:12px;
  padding:11px 6px;
  border-radius:10px;
  font-size:14px;
  color:var(--text-secondary);
  transition:background .2s, color .2s, transform .2s;
}
.panel-links a span{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  color:var(--sky);
  font-size:12px;
  letter-spacing:.08em;
  width:20px;
}
.panel-links a:hover{
  background:rgba(61,127,255,.14);
  color:#fff;
  transform:translateX(3px);
}
.panel-note{
  margin-top:16px;
  border-radius:var(--radius-sm);
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  padding:10px 14px;
  font-size:13px;
  color:var(--text-weak);
}
.section{
  padding:var(--space-section) 0;
}
.section-soft{
  background:var(--bg-soft);
}
.section-deep{
  background:var(--bg-panel);
}
.section-head{
  max-width:760px;
  margin-bottom:42px;
}
.section-head.center{
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}
.section-head h2{
  font-size:30px;
  font-weight:700;
  line-height:1.4;
  margin:16px 0 12px;
  letter-spacing:.01em;
}
.section-head .lead{
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.9;
}
.feature-layout{
  display:grid;
  grid-template-columns:1.3fr 1fr;
  gap:24px;
  align-items:stretch;
}
.feature-visual{
  display:block;
  height:230px;
  width:100%;
  object-fit:cover;
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;
}
.feature-card{
  overflow:hidden;
  display:flex;
  flex-direction:column;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-glass);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.feature-card:hover{
  border-color:rgba(71,209,255,.35);
  transform:translateY(-4px);
  box-shadow:0 24px 54px rgba(1,5,15,.4);
}
.feature-body{
  padding:28px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.feature-body h3{
  font-size:22px;
  margin:18px 0 12px;
  font-weight:700;
}
.feature-body p{
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.85;
}
.feature-points{
  display:grid;
  gap:8px;
  margin:18px 0 22px;
}
.feature-points li{
  font-size:14px;
  color:var(--text-secondary);
  padding-left:22px;
  position:relative;
}
.feature-points li::before{
  content:"✓";
  position:absolute;
  left:0;
  color:var(--sky);
  font-weight:700;
}
.feature-stack{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.stack-entry{
  padding:20px 22px;
  border-radius:var(--radius);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  transition:transform .25s ease, background .25s ease, border-color .25s ease;
}
.stack-entry:hover{
  transform:translateX(4px);
  background:rgba(61,127,255,.12);
  border-color:rgba(61,127,255,.42);
}
.stack-entry h4{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:600;
  color:#fff;
}
.stack-entry h4 .num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  color:var(--sky);
  font-size:13px;
  background:rgba(61,127,255,.16);
  border:1px solid rgba(61,127,255,.28);
  border-radius:6px;
  padding:2px 7px;
  line-height:1.4;
}
.stack-entry p{
  margin-top:8px;
  color:var(--text-secondary);
  font-size:14px;
  line-height:1.8;
  padding-left:26px;
}
.process-list{
  position:relative;
  margin-top:0;
}
.process-list::before{
  content:"";
  position:absolute;
  left:20px;
  top:14px;
  bottom:14px;
  width:1px;
  background:linear-gradient(to bottom,var(--sky),rgba(71,209,255,.12),transparent);
}
.process-step{
  position:relative;
  padding:0 0 34px 72px;
  display:block;
}
.process-step:last-child{
  padding-bottom:0;
}
.step-mark{
  position:absolute;
  left:0;
  top:4px;
  width:42px;
  height:42px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:rgba(11,19,36,.9);
  border:1px solid rgba(71,209,255,.5);
  color:var(--sky);
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  font-size:16px;
  z-index:1;
  box-shadow:0 0 0 5px rgba(71,209,255,.08), 0 0 20px rgba(71,209,255,.18);
}
.process-step h3{
  font-size:19px;
  font-weight:600;
  line-height:1.4;
  color:#fff;
}
.process-step p{
  margin-top:10px;
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.85;
  max-width:880px;
}
.type-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.type-card{
  padding:26px 22px;
  border-radius:var(--radius-lg);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  position:relative;
  overflow:hidden;
  transition:transform .25s ease, border-color .25s ease, background .25s ease;
}
.type-card::after{
  content:"";
  position:absolute;
  width:88px;
  height:88px;
  right:-42px;
  top:-42px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(61,127,255,.2), transparent 72%);
}
.type-card:hover{
  transform:translateY(-4px);
  border-color:rgba(61,127,255,.45);
  background:rgba(61,127,255,.09);
}
.type-card .icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  border-radius:12px;
  background:rgba(61,127,255,.15);
  border:1px solid rgba(61,127,255,.35);
  color:var(--sky);
  font-size:19px;
  margin-bottom:18px;
}
.type-card h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:10px;
}
.type-card p{
  color:var(--text-secondary);
  font-size:14px;
  line-height:1.85;
}
.type-card .list-dot{
  margin-top:14px;
  display:flex;
  flex-wrap:wrap;
  gap:6px 14px;
}
.type-card .list-dot li{
  font-size:13px;
  color:var(--text-weak);
  position:relative;
  padding-left:12px;
}
.type-card .list-dot li::before{
  content:"";
  position:absolute;
  left:0;
  top:.65em;
  width:4px;
  height:4px;
  border-radius:50%;
  background:var(--accent);
}
.advice-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.advice-hidden {
  overflow:hidden;
}
.advice-panel{
  padding:30px;
  height:100%;
}
.advice-panel h3{
  font-size:22px;
  font-weight:700;
  margin-bottom:14px;
}
.advice-panel p{
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.9;
}
.safety-list{
  margin-top:16px;
  display:grid;
  gap:10px;
}
.safety-list li{
  font-size:14px;
  color:var(--text-secondary);
  padding-left:28px;
  position:relative;
}
.safety-list li::before{
  content:"◆";
  position:absolute;
  left:4px;
  color:var(--accent);
  font-size:11px;
  top:.2em;
}
.faq{
  padding:var(--space-section) 0;
  background:var(--bg-soft);
}
.faq-list{
  display:grid;
  gap:12px;
  max-width:880px;
  margin:0 auto;
}
.faq-item{
  border-radius:var(--radius);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  padding:6px 22px;
  transition:background .25s, border-color .25s;
}
.faq-item[open]{
  background:rgba(61,127,255,.08);
  border-color:rgba(71,209,255,.48);
}
.faq-item summary{
  cursor:pointer;
  list-style:none;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:18px;
  padding:16px 0;
  font-size:17px;
  font-weight:600;
  color:var(--text-primary);
  outline:none;
  transition:color .2s;
}
.faq-item summary::-webkit-details-marker{
  display:none;
}
.faq-item summary::after{
  content:"+";
  font-size:24px;
  font-weight:400;
  line-height:1;
  color:var(--sky);
  transition:transform .25s ease, color .2s ease;
  flex:0 0 auto;
}
.faq-item[open] summary::after{
  transform:rotate(45deg);
}
.faq-item summary:hover{
  color:#fff;
}
.faq-body{
  padding:0 0 18px;
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.9;
  border-top:1px solid rgba(151,181,255,.12);
  padding-top:16px;
}
.faq-body strong{
  color:var(--text-primary);
  font-weight:600;
}
.faq-body ol{
  margin-top:6px;
  padding-left:2px;
  display:grid;
  gap:8px;
}
.faq-body ol li{
  color:var(--text-secondary);
  padding-left:26px;
  position:relative;
}
.faq-body ol li::before{
  content:counter();
  counter-increment:faq-order;
  position:absolute;
  left:0;
  color:var(--sky);
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:13px;
}
.faq-item .faq-body ol{
  counter-reset:faq-order;
}
.cta-section{
  padding:76px 0 var(--space-section);
}
.cta-panel{
  background:
    radial-gradient(circle at 85% 0%, rgba(61,127,255,.18), transparent 38%),
    rgba(255,255,255,.045);
  background-blend-mode:overlay;
  border:1px solid rgba(151,181,255,.14);
  border-radius:24px;
  overflow:hidden;
  padding:46px 0;
  display:grid;
  grid-template-columns:1.2fr 1fr;
}
.cta-left{
  padding:10px 48px;
}
.cta-left h2{
  font-size:28px;
  line-height:1.5;
  font-weight:700;
}
.cta-left p{
  color:var(--text-secondary);
  font-size:15px;
  margin:14px 0 24px;
  line-height:1.9;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.cta-right{
  display:flex;
  align-items:center;
  justify-content:center;
  border-left:1px solid var(--line);
  margin:8px 0;
}
.contact-card{
  padding:28px 26px;
  width:min(100%, 340px);
  border-radius:var(--radius-lg);
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.contact-card h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:16px;
}
.contact-card dl{
  margin:0;
  display:grid;
  gap:14px;
}
.contact-card dt{
  color:var(--sky);
  font-size:13px;
  font-weight:600;
}
.contact-card dd{
  margin:4px 0 0;
  color:var(--text-secondary);
  font-size:14px;
  line-height:1.7;
}
.site-footer{
  color:var(--text-secondary);
  background:
    radial-gradient(circle at 70% 0%, rgba(61,127,255,.16), transparent 36%),
    linear-gradient(180deg, rgba(6,11,23,.5), rgba(2,5,11,.95)),
    url("/assets/images/backpic/back-2.webp") center top / cover no-repeat;
  border-top:1px solid rgba(151,181,255,.12);
  padding:72px 0 34px;
}
.footer-huge{
  font-size:clamp(50px, 13vw, 168px);
  line-height:.9;
  font-weight:800;
  text-align:center;
  letter-spacing:-.02em;
  background:linear-gradient(180deg, rgba(255,255,255,.18), rgba(255,255,255,.015));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  user-select:none;
  margin-bottom:34px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .9fr .9fr 1fr;
  gap:44px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line);
}
.footer-brand p{
  color:var(--text-secondary);
  font-size:14px;
  line-height:1.9;
  max-width:340px;
}
.footer-brand h2{
  font-size:22px;
  color:var(--text-primary);
  line-height:1.4;
  font-weight:700;
}
.footer-col h3{
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-bottom:18px;
}
.footer-col ul{
  display:grid;
  gap:10px;
}
.footer-col a{
  color:var(--text-secondary);
  font-size:14px;
  transition:color .2s, padding-left .2s;
}
.footer-col a:hover{
  color:var(--sky);
  padding-left:5px;
}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  padding-top:26px;
  font-size:13px;
  color:var(--text-weak);
}
.main-content{
  min-height:60vh;
}
@media (max-width:1179px){
  .hero-inner{
    grid-template-columns:1fr 1fr;
    gap:30px;
  }
  .feature-layout{
    grid-template-columns:1fr;
  }
  .type-grid{
    grid-template-columns:repeat(3,1fr);
  }
  .cta-panel{
    grid-template-columns:1fr;
    gap:18px;
  }
  .cta-right{
    border-left:0;
    border-top:1px solid var(--line);
    padding-top:20px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
  .hero h1{
    font-size:30px;
  }
  .footer-huge{
    margin-bottom:24px;
  }
}
@media (max-width:900px){
  :root{
    --space-section:72px;
  }
  .hero-inner{
    grid-template-columns:1fr;
    padding:62px 0 74px;
  }
  .type-grid{
    grid-template-columns:1fr 1fr;
  }
  .advice-wrap{
    grid-template-columns:1fr;
  }
  .header-inner{
    gap:15px;
  }
  .brand{
    font-size:16px;
  }
  .main-nav{
    order:3;
    width:100%;
    margin-left:0;
    padding-bottom:8px;
  }
  .header-inner{
    flex-wrap:wrap;
  }
  .header-cta{
    margin-left:auto;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:34px;
  }
}
@media (max-width:767px){
  body{
    font-size:15px;
  }
  .container{
    width:min(100% - 32px, 1200px);
  }
  :root{
    --space-section:52px;
  }
  .section-head h2{
    font-size:24px;
  }
  .hero{
    background:
      radial-gradient(circle at 80% 5%, rgba(71,209,255,.14), transparent 40%),
      linear-gradient(183deg, rgba(6,11,23,.8), rgba(9,17,32,.96)),
      url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  }
  .hero h1{
    font-size:28px;
  }
  .hero-actions .btn{
    width:100%;
  }
  .hero-panel{
    padding:24px 20px;
  }
  .type-grid{
    grid-template-columns:1fr;
  }
  .feature-body{
    padding:22px;
  }
  .stack-entry p{
    padding-left:0;
  }
  .stack-entry h4{
    align-items:flex-start;
  }
  .process-step{
    padding-left:58px;
  }
  .step-mark{
    width:36px;
    height:36px;
    font-size:14px;
  }
  .process-list::before{
    left:17px;
  }
  .faq-item summary{
    font-size:15px;
  }
  .cta-panel{
    grid-template-columns:1fr;
    padding:30px 0;
    border-radius:18px;
  }
  .cta-left{
    padding:8px 24px;
  }
  .advice-panel{
    padding:22px;
  }
  .site-footer{
    padding-top:48px;
  }
  .footer-huge{
    font-size:62px;
  }
  .footer-bottom{
    display:grid;
    gap:8px;
  }
  .hero-inner{
    gap:38px;
  }
}
@media (prefers-reduced-motion: reduce){
  *,
  *::before,
  *::after{
    animation:none !important;
    transition:none !important;
  }
  html{
    scroll-behavior:auto;
  }
}

/* roulang page: article */
:root {
  --bg-deep: #060B17;
  --bg-main: #0B1324;
  --bg-soft: #091120;
  --primary: #3D7FFF;
  --accent: #47D1FF;
  --star: #FFC857;
  --text-main: #EBF2FF;
  --text-sub: #A6B4D0;
  --text-weak: #7285A8;
  --line: rgba(151, 181, 255, .12);
  --success: #3FC89B;
  --warning: #F59E0B;
  --danger: #F26B6B;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-lg: 0 20px 50px rgba(1, 5, 15, .38);
  --shadow-primary: 0 0 0 3px rgba(61, 127, 255, .2), 0 8px 24px rgba(61, 127, 255, .35);
  --font-cn: "PingFang SC", "Microsoft YaHei UI", "Noto Sans SC", "Helvetica Neue", sans-serif;
  --font-num: "Inter", "DIN Alternate", var(--font-cn);
  --header-h: 72px;
  --section-space: clamp(56px, 7vw, 96px);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg-deep);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body, main, section, header, footer, article, aside {
  display: block;
}

img, svg {
  max-width: 100%;
  border: 0;
}

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

button, input, textarea {
  font: inherit;
  color: inherit;
}

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

ul, ol {
  padding-left: 0;
}

.hidden {
  display: none !important;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 1200;
  padding: 10px 16px;
  background: var(--primary);
  color: #fff;
  border-radius: 0 0 8px 8px;
  transition: top .2s ease;
}
.skip-link:focus {
  top: 0;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.5;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}
.btn-primary {
  background: linear-gradient(135deg, #3578F5, #2B66E8);
  border-color: rgba(99, 153, 255, .35);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 5px rgba(61, 127, 255, .28), 0 14px 34px rgba(61, 127, 255, .45);
}
.btn-primary:focus-visible,
.btn-ghost:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-ghost {
  background: rgba(61, 127, 255, .08);
  border-color: rgba(71, 209, 255, .35);
  color: var(--text-main);
}
.btn-ghost:hover {
  background: rgba(61, 127, 255, .16);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.btn-sm {
  min-height: 40px;
  padding: 8px 18px;
  font-size: 14px;
}

/* Chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(71, 209, 255, .12);
  border: 1px solid rgba(71, 209, 255, .3);
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}
.chip-warning {
  background: rgba(245, 158, 11, .12);
  border-color: rgba(245, 158, 11, .3);
  color: var(--star);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(6, 11, 23, .84);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid rgba(71, 209, 255, .15);
}
.header-inner {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .5px;
  white-space: nowrap;
  background: linear-gradient(135deg, #fff, #B7D4FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: opacity .2s ease;
}
.brand:hover {
  opacity: .82;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  scrollbar-width: none;
}
.main-nav::-webkit-scrollbar {
  display: none;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  white-space: nowrap;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.nav-chip:hover {
  color: var(--text-main);
  background: rgba(151, 181, 255, .1);
}
.nav-chip.active {
  color: #fff;
  background: rgba(61, 127, 255, .18);
  border-color: rgba(71, 209, 255, .45);
  box-shadow: 0 0 20px rgba(61, 127, 255, .14);
}
.nav-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.header-cta {
  flex-shrink: 0;
}

/* Page head */
.page-head {
  position: relative;
  padding: clamp(68px, 8vw, 104px) 0 56px;
  background:
    linear-gradient(180deg, rgba(6, 11, 23, .68), rgba(6, 11, 23, .96)),
    radial-gradient(circle at 20% 35%, rgba(61, 127, 255, .16), transparent 32%),
    radial-gradient(circle at 82% 28%, rgba(71, 209, 255, .12), transparent 28%),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.page-head::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(71, 209, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(71, 209, 255, .05) 1px, transparent 1px);
  background-size: 70px 70px;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, #000, transparent 85%);
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 85%);
}
.breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 24px;
}
.breadcrumb a {
  color: var(--text-sub);
  transition: color .2s ease;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: rgba(151, 181, 255, .35);
}
.breadcrumb .current {
  color: var(--text-sub);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 340px;
}
.article-title {
  position: relative;
  z-index: 1;
  font-size: clamp(30px, 4vw, 38px);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: .5px;
  max-width: 900px;
}
.post-meta {
  position: relative;
  z-index: 1;
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  color: var(--text-sub);
  font-size: 14px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item svg {
  width: 16px;
  height: 16px;
  opacity: .8;
}
.meta-item time {
  color: var(--text-sub);
}
.chip-category {
  background: rgba(71, 209, 255, .12);
  border-color: rgba(71, 209, 255, .32);
  color: var(--accent);
  font-size: 13px;
}

/* Article main */
.article-section {
  padding: 56px 0 72px;
  background:
    radial-gradient(circle at 12% 0%, rgba(61, 127, 255, .1), transparent 30%),
    var(--bg-deep);
}
.article-container {
  width: min(820px, 100% - 40px);
  margin-inline: auto;
}
.article-pane {
  background: linear-gradient(160deg, rgba(17, 26, 50, .88), rgba(9, 17, 32, .96));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  padding: clamp(28px, 5vw, 54px);
  position: relative;
}
.article-pane::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(71, 209, 255, .6), transparent);
  opacity: .7;
}

/* Article body typography */
.article-body {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-main);
}
.article-body > * + * {
  margin-top: 20px;
}
.article-body p {
  color: rgba(235, 242, 255, .92);
}
.article-body h2 {
  font-size: 25px;
  line-height: 1.4;
  font-weight: 700;
  color: #fff;
  margin-top: 40px;
  padding-top: 8px;
}
.article-body h3 {
  font-size: 19px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 34px;
}
.article-body h4 {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-main);
  margin-top: 28px;
}
.article-body ul,
.article-body ol {
  padding-left: 1.25rem;
}
.article-body li {
  margin: 8px 0;
}
.article-body li::marker {
  color: var(--accent);
}
.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .2s ease;
}
.article-body a:hover {
  color: #8FDFFF;
}
.article-body blockquote {
  margin: 28px 0;
  padding: 16px 22px;
  border-left: 3px solid var(--primary);
  background: rgba(61, 127, 255, .08);
  color: var(--text-sub);
  border-radius: 0 10px 10px 0;
  font-style: normal;
}
.article-body img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
  margin: 30px 0;
  border: 1px solid var(--line);
}
.article-body figure {
  margin: 30px 0;
}
.article-body figcaption {
  font-size: 13px;
  color: var(--text-weak);
  text-align: center;
  margin-top: 10px;
}
.article-body strong {
  color: #fff;
  font-weight: 700;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.article-body th,
.article-body td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
}
.article-body th {
  background: rgba(61, 127, 255, .1);
  color: #fff;
}

/* Empty state */
.empty-article {
  text-align: center;
  padding: 44px 16px;
}
.empty-article-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 22px;
  background: rgba(245, 158, 11, .12);
  border: 1px solid rgba(245, 158, 11, .28);
  color: var(--star);
  font-size: 34px;
}
.empty-article h2 {
  font-size: 24px;
  margin-bottom: 12px;
}
.empty-article p {
  color: var(--text-sub);
  max-width: 480px;
  margin: 0 auto 24px;
}

/* Post footer */
.post-end {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}
.post-tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-sub);
  background: rgba(151, 181, 255, .07);
  border: 1px solid rgba(151, 181, 255, .16);
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.post-tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(71, 209, 255, .08);
}
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.post-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 60px;
  padding: 12px 16px;
  background: rgba(151, 181, 255, .06);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--text-sub);
  font-size: 14px;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
}
.post-nav-link:hover {
  color: var(--text-main);
  border-color: rgba(71, 209, 255, .45);
  transform: translateY(-2px);
}
.post-nav-link .arrow {
  color: var(--accent);
  font-size: 18px;
  transition: transform .2s ease;
}
.post-nav-link:hover .arrow {
  transform: translateX(4px);
}

/* Related section */
.related-section {
  padding: 0 0 80px;
  background: var(--bg-deep);
}
.related-section .container {
  width: min(1160px, 100% - 40px);
}
.section-topline {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}
.section-topline .left-tagline {
  color: var(--text-sub);
  font-size: 14px;
  margin-top: 8px;
}
.section-title {
  font-size: clamp(24px, 3vw, 30px);
  line-height: 1.3;
  font-weight: 700;
}
.section-title .dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 12px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(71, 209, 255, .15);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.related-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 80% 0%, rgba(61, 127, 255, .1), transparent 36%), var(--bg-soft);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.related-card:hover {
  border-color: rgba(71, 209, 255, .45);
  transform: translateY(-6px);
  box-shadow: 0 22px 40px rgba(1, 5, 15, .36);
}
.related-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  position: relative;
  background: #060B17;
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}
.related-card:hover .related-cover img {
  transform: scale(1.05);
}
.related-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(9, 17, 32, .92), transparent 50%);
}
.related-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 22px 22px 24px;
}
.related-chip {
  align-self: flex-start;
  margin-bottom: 14px;
}
.related-body h3 {
  font-size: 19px;
  line-height: 1.5;
  margin-bottom: 10px;
}
.related-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-sub);
  margin-bottom: 18px;
}
.go-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
}
.go-link .arrow {
  transition: transform .2s ease;
}
.related-card:hover .go-link .arrow {
  transform: translateX(5px);
}

/* Support CTA */
.support-cta {
  position: relative;
  padding: 0 0 96px;
  background: var(--bg-deep);
}
.support-inner {
  position: relative;
  border-radius: 22px;
  padding: 38px 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  background:
    linear-gradient(120deg, rgba(61, 127, 255, .12), rgba(6, 11, 23, .72) 48%),
    url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
  border: 1px solid rgba(151, 181, 255, .18);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.support-inner::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  right: -80px;
  top: -90px;
  border: 1px solid rgba(71, 209, 255, .22);
  border-radius: 50%;
  box-shadow:
    0 0 0 44px rgba(71, 209, 255, .04),
    0 0 0 90px rgba(71, 209, 255, .03);
  pointer-events: none;
}
.support-copy {
  position: relative;
  z-index: 1;
}
.support-copy .chip {
  margin-bottom: 14px;
}
.support-copy h2 {
  font-size: clamp(24px, 3vw, 30px);
  line-height: 1.35;
  color: #fff;
  margin-bottom: 12px;
}
.support-copy p {
  color: var(--text-sub);
  font-size: 15px;
  max-width: 640px;
}
.support-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  position: relative;
  background:
    radial-gradient(circle at 50% 110%, rgba(61, 127, 255, .14), transparent 36%),
    var(--bg-soft);
  border-top: 1px solid var(--line);
  overflow: hidden;
  padding: 72px 0 30px;
}
.footer-huge {
  text-align: center;
  font-size: clamp(96px, 16vw, 220px);
  line-height: .85;
  letter-spacing: .06em;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1px rgba(151, 181, 255, .1);
  user-select: none;
  margin-bottom: 8px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
  margin-top: 24px;
}
.footer-brand {
  padding-right: 24px;
}
.footer-brand h2 {
  font-size: 23px;
  line-height: 1.5;
  color: #fff;
  font-weight: 700;
}
.footer-brand p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.8;
  margin-top: 12px;
}
.footer-col h3 {
  font-size: 15px;
  color: #fff;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: .3px;
}
.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}
.footer-col a {
  display: inline-flex;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.6;
  transition: color .2s ease, transform .2s ease;
}
.footer-col a:hover {
  color: var(--accent);
  transform: translateX(3px);
}
.footer-bottom {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  color: var(--text-weak);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .support-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .support-actions {
    justify-content: flex-start;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 860px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 0 16px;
  }
  .site-header {
    height: auto;
  }
  .brand {
    padding-top: 12px;
    padding-bottom: 12px;
  }
  .main-nav {
    order: 3;
    width: 100%;
    margin-left: -16px;
    overflow-x: auto;
    gap: 8px;
    padding: 4px 16px 10px;
  }
  .header-cta {
    margin-left: auto;
  }
  .article-pane {
    padding: 28px 24px;
  }
  .post-nav {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: span 2;
  }
}
@media (max-width: 620px) {
  .container {
    width: min(100% - 30px, 1200px);
  }
  .header-cta {
    font-size: 13px;
    padding: 8px 14px;
  }
  .brand {
    font-size: 18px;
  }
  .article-container {
    width: calc(100% - 24px);
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-brand {
    grid-column: span 1;
  }
  .support-inner {
    padding: 30px 22px;
  }
  .breadcrumb .current {
    max-width: 220px;
  }
}

/* roulang page: category3 */
:root{
  --bg:#060B17;
  --bg-alt:#091120;
  --bg-2:#0B1324;
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.085);
  --line:rgba(151,181,255,.12);
  --primary:#3D7FFF;
  --accent:#47D1FF;
  --amber:#FFC857;
  --text:#EBF2FF;
  --text-sub:#A6B4D0;
  --muted:#7285A8;
  --danger:#F26B6B;
  --warn:#F59E0B;
  --success:#3FC89B;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:8px;
  --shadow:0 20px 50px rgba(1,5,15,.35);
  --font-sans:"PingFang SC","Microsoft YaHei UI","Noto Sans SC","Helvetica Neue",sans-serif;
  --font-num:"Inter","SF Pro Display",var(--font-sans);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--bg)}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
body::selection{background:rgba(61,127,255,.45);color:#fff}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,textarea,select{font:inherit}
.container{width:min(1200px,100% - 48px);margin-inline:auto}
section[id],main[id],#top{scroll-margin-top:104px}
h1,h2,h3{line-height:1.25;text-wrap:balance}
h1{font-size:clamp(32px,4vw,42px);font-weight:700;letter-spacing:.02em}
h2{font-size:clamp(23px,2.5vw,28px);font-weight:600}
h3{font-size:clamp(17px,1.4vw,20px);font-weight:600}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;
}
::placeholder{color:rgba(168,180,208,.6)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:15px;line-height:1;
  padding:14px 22px;border-radius:var(--r-sm);
  border:1px solid transparent;cursor:pointer;transition:.25s ease;
  min-height:46px;white-space:nowrap;
}
.btn-sm{padding:10px 16px;min-height:40px;font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,#3D7FFF,#2567EB);
  color:#fff;box-shadow:0 0 0 3px rgba(61,127,255,.14),0 8px 24px rgba(61,127,255,.25);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 3px rgba(61,127,255,.22),0 12px 30px rgba(61,127,255,.4)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 3px rgba(61,127,255,.18),0 4px 16px rgba(61,127,255,.3)}
.btn-ghost{
  background:rgba(255,255,255,.04);border-color:var(--line);color:var(--text);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{border-color:rgba(71,209,255,.5);background:rgba(71,209,255,.08);transform:translateY(-2px)}
.btn-glow{background:rgba(255,200,87,.1);border:1px solid rgba(255,200,87,.35);color:#FFD582}
.btn-glow:hover{border-color:rgba(255,200,87,.7);background:rgba(255,200,87,.18)}
.chip{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;line-height:1;
  padding:8px 13px;border-radius:999px;background:rgba(61,127,255,.1);
  border:1px solid rgba(61,127,255,.3);color:var(--accent);letter-spacing:.03em;
}
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(6,11,23,.8);backdrop-filter:blur(20px) saturate(150%);-webkit-backdrop-filter:blur(20px) saturate(150%);
  border-bottom:1px solid rgba(71,209,255,.2);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:72px}
.brand{
  font-size:19px;font-weight:700;letter-spacing:.02em;color:#fff;display:flex;align-items:center;gap:10px;
  flex-shrink:0;
}
.brand::before{
  content:"";width:14px;height:14px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,#fff,var(--primary) 35%,var(--accent) 75%);
  box-shadow:0 0 0 5px rgba(61,127,255,.12),0 0 18px rgba(61,127,255,.4);
}
.main-nav{display:flex;align-items:center;gap:8px;margin-left:auto}
.nav-chip{
  display:inline-flex;align-items:center;padding:9px 15px;border-radius:999px;font-size:14px;
  color:var(--text-sub);font-weight:500;line-height:1;white-space:nowrap;
  border:1px solid transparent;transition:.25s ease;
}
.nav-chip:hover{color:#fff;background:rgba(255,255,255,.06);border-color:rgba(151,181,255,.15)}
.nav-chip.active{
  background:linear-gradient(135deg,rgba(61,127,255,.22),rgba(71,209,255,.1));
  color:#fff;border-color:rgba(71,209,255,.55);
  box-shadow:0 0 20px rgba(61,127,255,.18),inset 0 1px 0 rgba(255,255,255,.08);
  font-weight:600;
}
.header-cta{margin-left:14px;flex-shrink:0}
main{position:relative;z-index:1;background:var(--bg)}
.category-hero{
  position:relative;padding:96px 0 82px;border-bottom:1px solid var(--line);
  background:
    linear-gradient(105deg,rgba(6,11,23,.96) 5%,rgba(6,11,23,.82) 45%,rgba(16,34,68,.55) 90%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  overflow:hidden;
}
.category-hero::after{
  content:"";position:absolute;right:-130px;top:-120px;width:440px;height:440px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(61,127,255,.26),rgba(71,209,255,.06),transparent);
  pointer-events:none;
}
.cat-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.18fr .82fr;gap:56px;align-items:center}
.cat-hero-copy .cat-spacer{height:24px}
.cat-hero-copy h1{margin:18px 0 18px;font-size:clamp(30px,3.6vw,44px)}
.cat-hero-copy p{
  color:var(--text-sub);font-size:17px;max-width:630px;margin-bottom:32px;line-height:1.9;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-panel{
  background:linear-gradient(145deg,rgba(255,255,255,.075),rgba(255,255,255,.035));
  border:1px solid rgba(151,181,255,.18);border-radius:var(--r-lg);
  padding:28px 26px;backdrop-filter:blur(20px) saturate(170%);-webkit-backdrop-filter:blur(20px) saturate(170%);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.09);
  position:relative;overflow:hidden;
}
.hero-panel::before{
  content:"";position:absolute;left:-70px;top:-50px;width:180px;height:180px;border-radius:50%;
  border:1px solid rgba(71,209,255,.18);background:
   radial-gradient(circle at center,transparent 42%,rgba(71,209,255,.08) 43%,transparent 55%),
   radial-gradient(circle at center,transparent 64%,rgba(71,209,255,.16) 65%,transparent 72%);
  pointer-events:none;
}
.panel-label{
  display:block;font-size:14px;font-weight:600;color:var(--accent);margin-bottom:18px;letter-spacing:.12em;
}
.hero-panel ul{display:grid;gap:14px;position:relative}
.hero-panel li{
  background:rgba(71,209,255,.05);border:1px solid rgba(71,209,255,.14);
  border-radius:12px;padding:14px 16px;display:flex;align-items:center;gap:12px;color:var(--text);
  font-size:15px;transition:.25s ease;
}
.hero-panel li:hover{border-color:rgba(71,209,255,.4);background:rgba(71,209,255,.09);transform:translateX(4px)}
.hero-panel li::before{
  content:"";width:9px;height:9px;flex:none;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px rgba(71,209,255,.15),0 0 12px rgba(71,209,255,.45);
}
.hero-panel em{
  font-style:normal;display:block;font-size:12.5px;color:var(--muted);margin-top:14px;line-height:1.6;
  border-top:1px dashed rgba(151,181,255,.16);padding-top:14px;
}
.section-block{padding:92px 0}
.section-block.bg-alt{background:var(--bg-alt)}
.section-block.bg-2{background:var(--bg-2)}
.section-head{max-width:760px;margin:0 auto 54px;text-align:center}
.section-head .section-kicker{
  display:inline-flex;font-size:13px;letter-spacing:.18em;color:var(--accent);text-transform:uppercase;
  margin-bottom:14px;font-weight:600;
}
.section-head h2{color:#fff}
.section-head p{color:var(--text-sub);margin-top:12px;font-size:16px}
.flow-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.flow-item{
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.025));
  border:1px solid var(--line);border-radius:var(--r-lg);padding:30px 26px 30px;
  position:relative;transition:.3s ease;overflow:hidden;
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
}
.flow-item::before{
  content:"";position:absolute;left:0;top:0;width:100%;height:2px;
  background:linear-gradient(90deg,transparent,var(--accent),var(--primary),transparent);
  opacity:.35;transition:.3s;
}
.flow-item:hover{transform:translateY(-6px);box-shadow:0 24px 48px rgba(1,5,15,.35),inset 0 1px 0 rgba(255,255,255,.07)}
.flow-item:hover::before{opacity:1}
.flow-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:14px;
  font-size:20px;font-weight:700;color:var(--amber);background:rgba(255,200,87,.09);
  border:1px solid rgba(255,200,87,.28);margin-bottom:20px;
  box-shadow:0 0 22px rgba(255,200,87,.12);
}
.flow-item h3{font-size:18px;color:#fff;margin-bottom:12px}
.flow-item p{color:var(--text-sub);font-size:14.5px;margin:0}
.split-sec{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:36px;align-items:start}
.split-main{min-width:0}
.methods-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0 30px}
.method-card{
  background:rgba(255,255,255,.045);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 20px;transition:.3s ease;
}
.method-card:hover{background:rgba(61,127,255,.07);border-color:rgba(61,127,255,.35);transform:translateY(-3px)}
.method-card h3{display:flex;align-items:center;gap:10px;color:#fff;font-size:16.5px;margin-bottom:10px}
.method-card h3::before{
  content:"";width:8px;height:8px;flex:none;border-radius:3px;background:var(--accent);transform:rotate(45deg);
}
.method-card p{color:var(--text-sub);font-size:14.5px}
.verify-figure{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  background:var(--bg-alt);box-shadow:var(--shadow);
}
.verify-figure img{width:100%;height:100%;object-fit:cover;max-height:300px}
.verify-figure figcaption{
  padding:13px 18px;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:10px;
}
.verify-figure figcaption::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px rgba(63,200,155,.15);
}
.side-panel{display:flex;flex-direction:column;gap:22px;position:sticky;top:100px}
.side-card{
  background:linear-gradient(155deg,rgba(255,255,255,.08),rgba(255,255,255,.035));
  border:1px solid rgba(71,209,255,.18);border-radius:var(--r-lg);padding:24px 22px;
  backdrop-filter:blur(18px) saturate(150%);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.08);
}
.side-card h3{display:flex;align-items:center;gap:10px;font-size:18px;color:#fff;margin-bottom:16px}
.side-card h3::after{
  content:"";flex:1;height:1px;background:linear-gradient(90deg,rgba(71,209,255,.4),transparent);
}
.side-card ul{display:grid;gap:11px}
.side-card li{position:relative;padding-left:19px;color:var(--text-sub);font-size:14.5px;line-height:1.7}
.side-card li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:4px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 8px rgba(71,209,255,.5);
}
.side-card.warning{border-color:rgba(242,107,107,.3)}
.side-card.warning li::before{background:var(--warn);box-shadow:0 0 8px rgba(245,158,11,.5)}
.protect-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.protect-item{
  background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;transition:.3s;position:relative;overflow:hidden;
}
.protect-item::after{
  content:attr(data-index);position:absolute;right:12px;bottom:-20px;font-size:76px;font-weight:800;
  color:rgba(255,255,255,.025);font-family:var(--font-num);line-height:1;pointer-events:none;
}
.protect-item:hover{background:rgba(61,127,255,.06);border-color:rgba(61,127,255,.4);transform:translateY(-4px)}
.protect-icon{
  width:44px;height:44px;margin-bottom:18px;border-radius:12px;position:relative;
  background:linear-gradient(135deg,rgba(71,209,255,.18),rgba(61,127,255,.12));
  border:1px solid rgba(71,209,255,.25);display:flex;align-items:center;justify-content:center;
}
.protect-icon::after{
  content:"";width:16px;height:16px;border-radius:8px;
  border:2px solid #fff;border-top-color:transparent;border-right-color:transparent;
  transform:rotate(-45deg);
}
.protect-item h3{color:#fff;font-size:18px;margin-bottom:10px}
.protect-item p{color:var(--text-sub);font-size:14.5px}
.warning-area{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(245,158,11,.25);background:rgba(245,158,11,.05)}
.warning-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.warn-cell{padding:32px 26px;border-right:1px solid rgba(245,158,11,.12);position:relative}
.warn-cell:last-child{border-right:0}
.warn-tag{
  display:inline-flex;font-size:12px;font-weight:700;letter-spacing:.08em;color:#F5C16A;
  background:rgba(245,158,11,.1);border:1px solid rgba(245,158,11,.3);border-radius:999px;padding:4px 10px;
  margin-bottom:16px;
}
.warn-cell h3{color:#fff;font-size:17px;margin-bottom:8px}
.warn-cell p{color:var(--text-sub);font-size:14px;line-height:1.7}
.warning-foot{
  border-top:1px solid rgba(151,181,255,.1);padding:18px 26px;display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  background:rgba(6,11,23,.4);
}
.warning-foot .rf-dot{width:10px;height:10px;flex:none;border-radius:50%;background:var(--danger);box-shadow:0 0 0 4px rgba(242,107,107,.18)}
.warning-foot span{color:var(--text-sub);font-size:14px}
.faq-wrap{max-width:840px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:.3s ease;
}
.faq-item[open]{background:rgba(71,209,255,.055);border-color:rgba(71,209,255,.4);box-shadow:0 12px 34px rgba(1,5,15,.3)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  cursor:pointer;padding:22px 24px;list-style:none;font-weight:600;color:#fff;font-size:17px;
  user-select:none;transition:.2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:none;width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  border-radius:10px;font-size:23px;font-weight:300;color:var(--accent);
  background:rgba(71,209,255,.1);border:1px solid rgba(71,209,255,.3);
  transition:.3s;
}
.faq-item[open] summary::after{transform:rotate(45deg);color:#061F38;background:var(--accent)}
.faq-item[open] summary{border-bottom:1px solid rgba(71,209,255,.2)}
.faq-answer{padding:8px 24px 24px;color:var(--text-sub);font-size:15px}
.cta-block{padding:80px 0 92px;background:var(--bg-alt);border-top:1px solid var(--line)}
.cta-card{
  background:linear-gradient(135deg,rgba(71,209,255,.1),rgba(61,127,255,.06)),url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  background-color:var(--bg-2);
  border:1px solid rgba(71,209,255,.25);border-radius:22px;
  padding:52px 48px;display:flex;flex-direction:column;align-items:center;text-align:center;
  position:relative;overflow:hidden;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.08);
}
.cta-card > *{position:relative;z-index:1}
.cta-card::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,11,23,.22),rgba(6,11,23,.62));
}
.cta-card h2{color:#fff;font-size:28px;margin-bottom:12px}
.cta-card p{color:var(--text-sub);max-width:690px;margin-bottom:30px;font-size:15.5px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.site-footer{background:var(--bg);border-top:1px solid var(--line);position:relative;overflow:hidden}
.footer-huge{
  text-align:center;font-weight:800;font-size:clamp(76px,10vw,156px);line-height:.8;
  padding:64px 0 0;color:transparent;letter-spacing:.1em;user-select:none;
  background:linear-gradient(180deg,rgba(71,209,255,.3),rgba(71,209,255,0) 88%);
  -webkit-background-clip:text;background-clip:text;
}
.footer-grid{
  display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:42px;
  padding:44px 0 48px;border-top:1px solid var(--line);margin-top:18px;
}
.footer-brand .chip{font-size:12.5px}
.footer-brand h2{color:#fff;font-size:23px}
.footer-brand p{color:var(--muted);font-size:14.5px;max-width:380px;margin-top:14px}
.footer-col h3{
  color:#fff;font-size:15.5px;font-weight:600;margin-bottom:18px;letter-spacing:.05em;
  display:flex;align-items:center;gap:10px;
}
.footer-col h3::after{content:"";width:26px;height:2px;background:var(--accent);border-radius:2px;opacity:.7}
.footer-col li{margin-bottom:10px}
.footer-col a{
  color:var(--muted);font-size:14px;transition:.2s ease;display:inline-flex;align-items:center;gap:6px;
}
.footer-col a::before{content:"›";color:var(--primary);font-size:16px;transition:.2s;opacity:0;margin-left:-12px}
.footer-col a:hover{color:var(--accent);transform:translateX(10px)}
.footer-col a:hover::before{opacity:1;margin-left:0}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;align-items:center;justify-content:space-between;
  gap:12px;color:var(--muted);font-size:13.5px;flex-wrap:wrap;
}
@media(max-width:1180px){
  .main-nav{gap:4px}
  .nav-chip{padding:8px 12px;font-size:13.5px}
  .brand{font-size:17px}
  .cat-hero-inner{grid-template-columns:1.1fr .9fr;gap:32px}
  .flow-wrap{grid-template-columns:repeat(2,1fr)}
  .protect-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media(max-width:920px){
  .header-inner{flex-wrap:wrap;padding:8px 0}
  .brand{order:1}
  .header-cta{order:2;margin-left:auto}
  .main-nav{
    order:3;width:100%;display:flex;overflow-x:auto;gap:8px;padding:6px 2px 10px;
    scrollbar-width:none;-webkit-overflow-scrolling:touch;
  }
  .main-nav::-webkit-scrollbar{display:none}
  .nav-chip{flex:none}
  .cat-hero-inner{grid-template-columns:1fr;gap:16px}
  .split-sec{grid-template-columns:1fr}
  .side-panel{position:static;display:grid;grid-template-columns:1fr 1fr}
  .warning-grid{grid-template-columns:repeat(2,1fr)}
  .warn-cell:nth-child(2){border-right:0}
  .warn-cell:nth-child(-n+2){border-bottom:1px solid rgba(245,158,11,.12)}
}
@media(max-width:767px){
  .container{width:min(100% - 32px,1200px)}
  .section-block{padding:56px 0}
  .category-hero{padding:54px 0 56px}
  .hero-actions .btn{width:100%}
  .hero-panel{padding:22px}
  .flow-wrap{grid-template-columns:1fr}
  .methods-grid{grid-template-columns:1fr}
  .split-sec{gap:26px}
  .side-panel{grid-template-columns:1fr}
  .protect-grid{grid-template-columns:1fr}
  .warning-grid{grid-template-columns:1fr}
  .warn-cell{border-right:0!important;border-bottom:1px solid rgba(245,158,11,.12)}
  .warn-cell:last-child{border-bottom:0}
  .cta-card{padding:40px 22px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{justify-content:center;text-align:center}
  .brand::before{width:12px;height:12px}
}

/* roulang page: category2 */
:root {
  --bg-deep: #060B17;
  --bg-alt: #0B1324;
  --bg-soft: #091120;
  --primary: #3D7FFF;
  --primary-2: #47D1FF;
  --amber: #FFC857;
  --success: #3FC89B;
  --text-1: #EBF2FF;
  --text-2: #A6B4D0;
  --text-3: #7285A8;
  --border: rgba(151, 181, 255, 0.12);
  --radius-lg: 18px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 20px 50px rgba(1, 5, 15, 0.35);
  --shadow-btn: 0 0 0 3px rgba(61, 127, 255, 0.2), 0 8px 24px rgba(61, 127, 255, 0.35);
  --container: 1200px;
  --font: "PingFang SC", "Microsoft YaHei UI", "Noto Sans SC", "Helvetica Neue", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text-1);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img {
  max-width: 100%;
  display: block;
  border: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}
h1, h2, h3, h4, p, figure {
  margin: 0;
}
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary-2);
  outline-offset: 3px;
  border-radius: 6px;
}
.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}
.section {
  padding: 96px 0;
}
.section-alt {
  background: var(--bg-alt);
}
.section-soft {
  background: var(--bg-soft);
}
.section-head {
  max-width: 860px;
  margin-bottom: 52px;
}
.section-head.center {
  margin-inline: auto;
  text-align: center;
}
.ko-overline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary-2);
  font-size: 14px;
  letter-spacing: 0.12em;
  font-weight: 600;
  margin-bottom: 12px;
}
.ko-overline::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--primary-2);
  opacity: .8;
}
.section-head.center .ko-overline::after {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--primary-2);
  opacity: .8;
}
.section-head h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 10px 0 16px;
}
.section-lead {
  color: var(--text-2);
  font-size: 16px;
  line-height: 1.8;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(6, 11, 23, 0.82);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom: 1px solid rgba(71, 209, 255, 0.14);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 72px;
  padding-block: 10px;
}
.brand {
  font-size: 21px;
  font-weight: 700;
  color: var(--text-1);
  white-space: nowrap;
  letter-spacing: .02em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.brand::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-2);
  box-shadow: 0 0 14px rgba(71, 209, 255, .9);
  flex-shrink: 0;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
  padding: 4px 2px;
}
.main-nav::-webkit-scrollbar {
  display: none;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-2);
  font-weight: 500;
  font-size: 14px;
  transition: all .2s ease;
  white-space: nowrap;
}
.nav-chip:hover {
  background: rgba(61, 127, 255, 0.1);
  border-color: rgba(61, 127, 255, 0.28);
  color: var(--text-1);
}
.nav-chip.active {
  background: rgba(61, 127, 255, 0.16);
  border-color: rgba(61, 127, 255, 0.55);
  color: #fff;
  box-shadow: inset 0 0 16px rgba(61, 127, 255, 0.08);
}
.header-cta {
  flex-shrink: 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .2s ease;
  min-height: 44px;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #2A6AEA 100%);
  color: #fff;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-ghost {
  background: rgba(61, 127, 255, 0.06);
  border-color: rgba(151, 181, 255, 0.16);
  color: var(--text-1);
}
.btn-ghost:hover {
  background: rgba(61, 127, 255, 0.14);
  border-color: rgba(71, 209, 255, .4);
}
.btn-light {
  background: #F5F8FF;
  color: #0A152D;
}
.btn-light:hover {
  background: #fff;
  transform: translateY(-2px);
}
.btn-sm {
  height: 40px;
  padding: 0 16px;
  font-size: 14px;
}
.btn-block {
  width: 100%;
}
.glass {
  background: linear-gradient(145deg, rgba(23, 34, 62, 0.82), rgba(10, 17, 34, 0.76));
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid rgba(151, 181, 255, 0.14);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.cat-hero {
  position: relative;
  padding: 78px 0 56px;
  overflow: hidden;
  background-color: var(--bg-soft);
  background-image:
    linear-gradient(180deg, rgba(6, 11, 23, 0.9) 0%, rgba(9, 17, 32, 0.94) 62%, var(--bg-soft) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
}
.cat-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(151, 181, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(151, 181, 255, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: .32;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 30%, #000 80%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 30%, #000 80%, transparent);
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
  gap: 56px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 8px;
  border-radius: 999px;
  border: 1px solid rgba(71, 209, 255, 0.3);
  background: rgba(71, 209, 255, 0.08);
  color: var(--primary-2);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  margin-bottom: 22px;
}
.hero-eyebrow i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 12px var(--amber);
}
.hero-copy h1 {
  font-size: clamp(36px, 4.2vw, 54px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin: 0 0 22px;
}
.hero-copy h1 .gradient-text {
  background: linear-gradient(90deg, var(--primary-2), var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-desc {
  color: var(--text-2);
  font-size: 16px;
  line-height: 1.85;
  max-width: 580px;
  margin-bottom: 34px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.entry-panel {
  padding: 30px;
  position: relative;
}
.entry-panel::before {
  content: "";
  position: absolute;
  top: 18px;
  right: 22px;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: rgba(61, 127, 255, .12);
  filter: blur(40px);
  pointer-events: none;
}
.panel-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}
.panel-title {
  font-weight: 700;
  font-size: 17px;
}
.live-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(63, 200, 155, 0.1);
  color: var(--success);
  font-size: 12px;
}
.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}
.panel-text {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 22px;
}
.quick-list {
  display: grid;
  gap: 12px;
  margin-bottom: 26px;
}
.quick-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border-radius: var(--radius);
  background: rgba(151, 181, 255, 0.07);
  border: 1px solid rgba(151, 181, 255, 0.08);
  transition: .22s ease;
  position: relative;
}
.quick-list a strong {
  font-weight: 600;
  color: var(--text-1);
  font-size: 15px;
}
.quick-list a span {
  color: var(--text-3);
  font-size: 13px;
  line-height: 1.6;
  text-align: right;
}
.quick-list a::after {
  content: "→";
  color: var(--primary-2);
  font-size: 18px;
  transition: transform .2s;
}
.quick-list a:hover {
  border-color: rgba(61, 127, 255, .45);
  background: rgba(61, 127, 255, .12);
  transform: translateY(-2px);
}
.quick-list a:hover::after {
  transform: translateX(4px);
}
.stat-band {
  position: relative;
  z-index: 3;
  margin-top: -8px;
}
.stat-inner {
  background: rgba(10, 19, 36, .78);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 28px 32px;
}
.stat-item {
  position: relative;
  padding: 12px 18px;
  border-left: 1px solid rgba(151, 181, 255, .1);
}
.stat-item:first-child {
  border-left: 0;
}
.stat-item b {
  display: block;
  font-family: Inter, "DIN Alternate", "PingFang SC", sans-serif;
  font-variant-numeric: tabular-nums;
  font-size: 42px;
  line-height: 1.1;
  color: var(--amber);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.stat-item span {
  color: var(--text-2);
  font-size: 14px;
}
.stat-item em {
  display: block;
  font-style: normal;
  color: var(--text-3);
  font-size: 13px;
  line-height: 1.6;
  margin-top: 2px;
}
.scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
  gap: 26px;
  align-items: start;
}
.main-scope-card {
  padding: 26px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, .9fr);
  align-items: center;
  gap: 24px;
}
.main-scope-card .card-intro {
  color: var(--text-3);
  font-size: 14px;
}
.main-scope-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  margin: 6px 0 14px;
}
.check-list {
  display: grid;
  gap: 10px;
  margin: 20px 0;
}
.check-list li {
  display: flex;
  gap: 10px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.6;
}
.check-list li::before {
  content: "";
  display: block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border: 1px solid var(--primary);
  border-radius: 50%;
  margin-top: 5px;
  background-image: radial-gradient(circle at center, var(--primary-2) 0 3px, transparent 4px);
}
.scope-image {
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(6, 11, 23, .36);
}
.scope-image img {
  width: 100%;
  height: 310px;
  object-fit: cover;
}
.scope-secondary {
  display: grid;
  gap: 16px;
}
.rail-item {
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(6, 11, 23, 0.08) 100%);
  transition: all .22s ease;
  display: block;
}
.rail-item:hover {
  border-color: rgba(61, 127, 255, .4);
  background: rgba(61, 127, 255, .08);
  transform: translateY(-2px);
}
.rail-item:nth-child(2) {
  border-color: rgba(71, 209, 255, 0.16);
}
.rail-item h3 {
  color: var(--text-1);
  font-weight: 600;
  font-size: 17px;
  margin-bottom: 5px;
}
.rail-item p {
  color: var(--text-3);
  font-size: 14px;
  line-height: 1.7;
}
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
  margin-top: 20px;
}
.step-card {
  position: relative;
  padding: 26px 22px;
  border-radius: var(--radius-lg);
  background: rgba(11, 19, 36, .74);
  border: 1px solid var(--border);
  min-height: 220px;
  transition: border-color .2s, transform .2s;
}
.step-card:hover {
  border-color: rgba(61, 127, 255, .45);
  transform: translateY(-3px);
}
.step-num {
  display: inline-flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(61, 127, 255, 0.14);
  border: 1px solid rgba(71, 209, 255, 0.32);
  color: var(--primary-2);
  font-weight: 700;
  font-size: 19px;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}
.step-card h3 {
  color: var(--text-1);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}
.step-card p {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.8;
}
.step-card::after {
  content: "→";
  position: absolute;
  right: -18px;
  top: 34px;
  color: rgba(71, 209, 255, 0.7);
  font-size: 18px;
  z-index: 2;
}
.step-card:last-child::after {
  display: none;
}
.role-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.role-card {
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--border);
  position: relative;
  transition: background .25s ease, transform .25s ease;
}
.role-card:hover {
  background: rgba(61, 127, 255, 0.09);
  transform: translateY(-4px);
  border-color: rgba(61, 127, 255, 0.3);
}
.role-badge {
  display: inline-block;
  font-size: 12px;
  color: var(--primary-2);
  border: 1px solid rgba(71, 209, 255, .3);
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(71, 209, 255, .08);
  margin-bottom: 18px;
}
.role-card h3 {
  color: var(--text-1);
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 12px;
}
.role-card p {
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.8;
}
.role-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 18px;
  color: var(--primary-2);
  font-size: 14px;
  font-weight: 500;
}
.role-link::after {
  content: "→";
  transition: margin .2s;
}
.role-card:hover .role-link::after {
  margin-left: 6px;
}
.split-guide {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 28px;
  align-items: start;
}
.guide-card {
  padding: 30px;
  border-radius: var(--radius-lg);
  background: rgba(10, 17, 34, 0.58);
  border: 1px solid var(--border);
}
.guide-card h3 {
  color: var(--text-1);
  font-size: 21px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.guide-card h3 i {
  display: flex;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: rgba(61, 127, 255, 0.14);
  border: 1px solid rgba(71, 209, 255, .3);
}
.security-list {
  display: grid;
  gap: 14px;
}
.security-list li {
  padding-left: 28px;
  position: relative;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.7;
}
.security-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--success);
  background: rgba(63, 200, 155, .12);
  border-radius: 50%;
}
.guide-stack {
  display: grid;
  gap: 18px;
}
.mini-guide {
  padding: 24px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
}
.mini-guide h4 {
  color: var(--text-1);
  font-weight: 600;
  font-size: 17px;
  margin-bottom: 10px;
}
.mini-guide p {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.8;
}
.faq-section {
  background: var(--bg-alt);
}
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 16px;
  background: rgba(255, 255, 255, 0.035);
  transition: background .22s ease, border-color .22s ease;
}
.faq-item.faq-open {
  background: rgba(61, 127, 255, 0.07);
  border-color: rgba(71, 209, 255, .35);
}
.faq-toggle {
  width: 100%;
  border: 0;
  background: none;
  color: var(--text-1);
  font-size: 17px;
  font-weight: 600;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  text-align: left;
  cursor: pointer;
  border-radius: 16px;
  transition: color .2s;
}
.faq-toggle:hover {
  color: #fff;
}
.faq-toggle span {
  font-size: 26px;
  font-weight: 400;
  color: var(--primary-2);
  line-height: 1;
  transition: transform .28s ease;
}
.faq-open .faq-toggle span {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-answer-inner {
  padding: 0 24px 22px;
}
.faq-answer-inner p {
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.9;
}
.cta-band {
  padding: 96px 0;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 20%, rgba(61,127,255,.16), transparent 32%),
    radial-gradient(circle at 80% 75%, rgba(71,209,255,.12), transparent 28%);
  pointer-events: none;
}
.cta-card {
  position: relative;
  padding: 46px;
  text-align: center;
  background: rgba(10, 18, 35, 0.72);
}
.cta-card h2 {
  font-size: clamp(25px, 3.4vw, 36px);
  font-weight: 700;
  margin-bottom: 14px;
}
.cta-card p {
  color: var(--text-2);
  font-size: 16px;
  max-width: 620px;
  margin: 0 auto 32px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}
.site-footer {
  padding: 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 260px;
  background:
    linear-gradient(180deg, rgba(11, 19, 36, 0) 0%, rgba(61, 127, 255, 0.05) 100%);
  pointer-events: none;
}
.footer-huge {
  font-size: clamp(48px, 11vw, 128px);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1.1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(151, 181, 255, 0.12);
  text-align: center;
  padding-top: 36px;
  user-select: none;
  pointer-events: none;
}
.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.4fr .8fr .9fr .9fr;
  gap: 44px;
  padding: 44px 0 40px;
}
.footer-grid h2, .footer-grid h3 {
  margin-top: 0;
}
.footer-col h3 {
  color: var(--text-1);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul {
  display: grid;
  gap: 10px;
}
.footer-col a, .footer-bottom {
  color: var(--text-3);
  font-size: 14px;
  line-height: 1.7;
  transition: color .2s ease;
}
.footer-col a:hover {
  color: var(--primary-2);
}
.footer-bottom {
  position: relative;
  border-top: 1px solid rgba(151, 181, 255, 0.08);
  padding: 22px 0 26px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}
.footer-brand p {
  color: var(--text-3);
  font-size: 14px;
  line-height: 1.8;
  max-width: 420px;
}
.footer-brand .chip {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(71, 209, 255, .25);
  color: var(--primary-2);
  font-size: 12px;
  letter-spacing: .08em;
}
@media (max-width: 1180px) {
  .main-scope-card {
    grid-template-columns: 1fr;
  }
  .scope-image img {
    height: 230px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .flow-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .step-card::after {
    display: none;
  }
}
@media (max-width: 980px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 6px 12px;
  }
  .main-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    margin-top: 4px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-desc {
    max-width: 720px;
  }
  .stat-inner {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-item {
    border-left: 0;
    border-bottom: 1px solid rgba(151, 181, 255, .08);
    padding-block: 16px;
  }
  .scope-grid {
    grid-template-columns: 1fr;
  }
  .split-guide {
    grid-template-columns: 1fr;
  }
  .role-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
  }
  .site-footer {
    padding-bottom: 12px;
  }
}
@media (max-width: 767px) {
  .section {
    padding: 56px 0;
  }
  .cat-hero {
    padding: 54px 0 40px;
  }
  .container {
    width: calc(100% - 36px);
  }
  .hero-copy h1 {
    font-size: 32px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn {
    width: 100%;
  }
  .entry-panel,
  .main-scope-card,
  .guide-card,
  .cta-card {
    padding: 20px;
  }
  .quick-list a {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .quick-list a span {
    text-align: left;
  }
  .quick-list a::after {
    position: absolute;
    right: 16px;
    top: 20px;
  }
  .stat-inner {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 18px 22px;
  }
  .stat-item {
    border-left: 0;
    border-bottom: 1px solid rgba(151, 181, 255, .08);
  }
  .stat-item:last-child {
    border-bottom: 0;
  }
  .stat-item b {
    font-size: 34px;
  }
  .flow-steps {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .step-card {
    min-height: 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .brand {
    font-size: 18px;
  }
  .nav-chip {
    padding: 0 14px;
  }
  .faq-toggle {
    font-size: 15px;
    padding: 17px 18px;
  }
  .faq-answer-inner {
    padding: 0 18px 20px;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
}

/* roulang page: category4 */
:root {
  --bg-page: #060B17;
  --bg-panel: #0B1324;
  --bg-soft: #0C1526;
  --bg-deep: #091120;
  --primary: #3D7FFF;
  --primary-deep: #2F66E0;
  --sky: #47D1FF;
  --amber: #FFC857;
  --success: #3FC89B;
  --warn: #F59E0B;
  --danger: #F26B6B;
  --text-main: #EBF2FF;
  --text-muted: #A6B4D0;
  --text-weak: #7285A8;
  --line: rgba(151, 181, 255, 0.12);
  --line-strong: rgba(71, 209, 255, 0.32);
  --radius-xl: 20px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-chip: 8px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --shadow-lg: 0 24px 60px rgba(1, 5, 15, 0.4);
  --shadow-md: 0 12px 38px rgba(1, 5, 15, 0.28);
  --shadow-primary: 0 0 0 3px rgba(61, 127, 255, 0.16), 0 8px 26px rgba(61, 127, 255, 0.28);
  --font-sans: "Inter", "PingFang SC", "Microsoft YaHei UI", "Noto Sans SC", "Helvetica Neue", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

body, section, article, aside, header, footer, main, nav {
  display: block;
}

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

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

img {
  max-width: 100%;
  height: auto;
  border: 0;
  display: block;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  border: 0;
  background: none;
  padding: 0;
  cursor: pointer;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

strong {
  font-weight: 700;
}

.container {
  width: min(1200px, calc(100% - 48px));
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section-head {
  margin-bottom: 44px;
  max-width: 780px;
}

.section-head.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--sky);
  font-size: 14px;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--sky));
}

.eyebrow-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--sky);
  font-size: 14px;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.eyebrow-light::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--sky);
}

.section-head h2 {
  font-size: 31px;
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-head p {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 15px;
  max-width: 680px;
}

.section-head.centered p {
  margin-left: auto;
  margin-right: auto;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 50px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.28s var(--ease);
  white-space: nowrap;
  min-height: 44px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-deep) 100%);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 3px rgba(61, 127, 255, 0.22), 0 14px 32px rgba(61, 127, 255, 0.42);
}

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

.btn-ghost {
  color: var(--text-main);
  background: rgba(235, 242, 255, 0.06);
  border: 1px solid rgba(151, 181, 255, 0.22);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.btn-ghost:hover {
  border-color: rgba(71, 209, 255, 0.55);
  background: rgba(71, 209, 255, 0.08);
  color: #fff;
  transform: translateY(-2px);
}

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

.btn-sm {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
}

.btn:focus-visible,
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 3px;
  border-radius: 6px;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  background: rgba(71, 209, 255, 0.1);
  border: 1px solid rgba(71, 209, 255, 0.26);
  border-radius: 999px;
  color: var(--sky);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.4;
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(6, 11, 23, 0.82);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid rgba(71, 209, 255, 0.13);
}

.header-inner {
  display: flex;
  align-items: center;
  min-height: 76px;
  gap: 30px;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #fff;
  background: linear-gradient(120deg, #ffffff 0%, #A8CCFF 65%, #62D9FF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.3;
  flex-shrink: 0;
}

.main-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(151, 181, 255, 0.1);
  border-radius: 999px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.nav-chip {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  border: 1px solid transparent;
  transition: all 0.22s var(--ease);
}

.nav-chip:hover {
  color: #fff;
  background: rgba(235, 242, 255, 0.08);
}

.nav-chip.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(61, 127, 255, 0.2), rgba(71, 209, 255, 0.12));
  border-color: rgba(71, 209, 255, 0.46);
  box-shadow: 0 0 0 1px rgba(61, 127, 255, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.header-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin-left: auto;
  border-radius: 10px;
}

.nav-toggle .bar {
  width: 18px;
  height: 2px;
  background: #EBF2FF;
  border-radius: 2px;
  transition: all 0.25s var(--ease);
}

/* ============ Hero / Banner ============ */
.page-hero {
  position: relative;
  min-height: 440px;
  display: flex;
  align-items: center;
  color: #fff;
  background:
    linear-gradient(105deg, rgba(6, 11, 23, 0.98) 8%, rgba(9, 17, 32, 0.86) 52%, rgba(7, 18, 38, 0.58) 100%),
    url("/assets/images/backpic/back-2.webp") center 20% / cover no-repeat;
  border-bottom: 1px solid rgba(151, 181, 255, 0.1);
  isolation: isolate;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(circle at 78% 18%, rgba(61, 127, 255, 0.22), transparent 260px),
    radial-gradient(circle at 18% 82%, rgba(71, 209, 255, 0.08), transparent 220px);
}

.page-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(71, 209, 255, 0.45), transparent);
}

.hero-caption {
  width: min(900px, calc(100% - 48px));
  margin: 0 auto;
  padding: 88px 0 92px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--text-weak);
  font-size: 14px;
  margin-bottom: 26px;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.breadcrumb .divider {
  opacity: 0.6;
}

.breadcrumb .current {
  color: #E8F0FF;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--sky);
  font-size: 14px;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}

.hero-eyebrow span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 12px rgba(255, 200, 87, 0.7);
}

.hero-caption h1 {
  font-size: 42px;
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 720px;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 34px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.hero-meta .tagbox {
  border: 1px solid rgba(151, 181, 255, 0.2);
  border-radius: 999px;
  background: rgba(11, 19, 36, 0.52);
  padding: 8px 16px;
  font-size: 13px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.hero-meta .tagbox i {
  width: 5px;
  height: 5px;
  border-radius: 99px;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(61, 127, 255, 0.8);
}

/* ============ Service Overview ============ */
.service-overview {
  background: linear-gradient(180deg, var(--bg-page), var(--bg-soft) 50%, var(--bg-page));
}

.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 36px;
  align-items: start;
}

.doc-topics-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.topic-cell {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 28px 26px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07);
  transition: all 0.3s var(--ease);
  min-height: 190px;
}

.topic-cell::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 20px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(71, 209, 255, 0.16), transparent 70%);
  opacity: 0.8;
}

.topic-cell:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: linear-gradient(145deg, rgba(71, 209, 255, 0.12), rgba(15, 26, 46, 0.6));
  box-shadow: 0 24px 48px rgba(1, 5, 15, 0.3);
}

.topic-index {
  font-family: "Inter", "PingFang SC", sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--sky);
  -webkit-font-feature-settings: "tnum";
  font-feature-settings: "tnum";
}

.topic-cell h3 {
  font-size: 19px;
  line-height: 1.45;
  font-weight: 600;
  margin: 9px 0 10px;
}

.topic-cell p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.75;
  max-width: 420px;
}

.support-aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.aside-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.018));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
}

.aside-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 12px;
}

.popular-list {
  display: flex;
  flex-direction: column;
}

.popular-list a {
  display: block;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(151, 181, 255, 0.1);
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.5;
  transition: all 0.2s var(--ease);
}

.popular-list a:hover {
  color: #fff;
  padding-left: 6px;
}

.popular-list a:last-child {
  border-bottom: 0;
}

.aside-support {
  background: #0B1324;
  border: 1px solid rgba(255, 200, 87, 0.22);
}

.aside-support h3 {
  color: var(--amber);
  border-bottom-color: rgba(255, 200, 87, 0.15);
}

.aside-support p {
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.support-dot {
  color: var(--amber);
}

/* ============ Docs Update Cards ============ */
.doc-update {
  background:
    linear-gradient(180deg, rgba(9, 17, 32, 0.6), rgba(11, 19, 36, 0.96)),
    url("/assets/images/backpic/back-3.webp") center top / cover no-repeat fixed;
}

.doc-update::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, transparent 0 79px, rgba(151, 181, 255, 0.03) 79px 80px);
  pointer-events: none;
}

.doc-card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
  position: relative;
  z-index: 1;
}

.doc-card {
  background: rgba(11, 19, 36, 0.74);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.32s var(--ease), border-color 0.32s var(--ease), box-shadow 0.32s var(--ease);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.doc-card:hover {
  transform: translateY(-6px);
  border-color: rgba(71, 209, 255, 0.38);
  box-shadow: 0 28px 58px rgba(1, 5, 15, 0.42);
}

.doc-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #071222;
}

.doc-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.doc-card:hover .doc-thumb img {
  transform: scale(1.05);
}

.doc-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 34%, rgba(6, 11, 23, 0.58) 100%);
}

.doc-thumb span {
  position: absolute;
  right: 12px;
  bottom: 12px;
  left: 12px;
  z-index: 1;
  font-size: 13px;
  color: rgba(235, 242, 255, 0.8);
  letter-spacing: 0.04em;
}

.doc-body {
  padding: 22px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.doc-body h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 600;
}

.doc-body .desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.doc-body .doc-tagrow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

.doc-tag {
  background: rgba(61, 127, 255, 0.1);
  border: 1px solid rgba(61, 127, 255, 0.28);
  color: #B3CCFF;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  line-height: 1.5;
}

.doc-tag.amber {
  background: rgba(255, 200, 87, 0.08);
  border-color: rgba(255, 200, 87, 0.24);
  color: #FFE6B0;
}

.doc-tag.cyan {
  background: rgba(71, 209, 255, 0.08);
  border-color: rgba(71, 209, 255, 0.24);
  color: #CFF5FF;
}

/* ============ Notes ============ */
.notes-section {
  background: var(--bg-deep);
}

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

.note-item {
  border: 1px solid var(--line);
  background: rgba(11, 19, 36, 0.55);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  position: relative;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.note-item:hover {
  background: rgba(11, 19, 36, 0.9);
  border-color: rgba(151, 181, 255, 0.28);
}

.note-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(61, 127, 255, 0.25), rgba(71, 209, 255, 0.1));
  border: 1px solid rgba(71, 209, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sky);
  font-size: 18px;
  margin-bottom: 16px;
}

.note-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.note-item p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}

/* ============ Process ============ */
.process-section {
  background: linear-gradient(180deg, var(--bg-page), rgba(9, 17, 32, 0.55), var(--bg-page));
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  position: relative;
}

.steps::before {
  content: "";
  position: absolute;
  top: 36px;
  right: 12.5%;
  left: 12.5%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(71, 209, 255, 0.45), rgba(61, 127, 255, 0.45), transparent);
}

.step-item {
  padding: 0 26px;
  text-align: center;
}

.step-num {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto 20px;
  background: #0B1324;
  border: 1px solid rgba(71, 209, 255, 0.35);
  box-shadow: 0 0 0 6px rgba(6, 11, 23, 0.8), 0 0 24px rgba(61, 127, 255, 0.35);
  font-family: "Inter", sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--sky);
  line-height: 1;
  transition: all 0.3s var(--ease);
}

.step-item:hover .step-num {
  transform: scale(1.08);
  border-color: var(--sky);
  box-shadow: 0 0 0 6px rgba(6, 11, 23, 0.8), 0 0 32px rgba(71, 209, 255, 0.55);
}

.step-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

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

/* ============ FAQ ============ */
.faq-section {
  background: #091120;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: rgba(13, 24, 42, 0.75);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  transition: border-color 0.25s ease, background 0.25s ease;
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
}

.faq-item[open] {
  border-color: rgba(71, 209, 255, 0.42);
  background: rgba(15, 29, 49, 0.84);
  box-shadow: 0 20px 42px rgba(1, 5, 15, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  list-style: none;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(71, 209, 255, 0.4);
  color: var(--sky);
  font-size: 18px;
  font-weight: 400;
  line-height: 1;
  transition: all 0.24s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: rgba(71, 209, 255, 0.14);
  border-color: var(--sky);
}

.faq-item .answer {
  padding: 4px 24px 22px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.85;
}

.faq-item .answer p {
  max-width: 720px;
}

/* ============ CTA Banner ============ */
.cta-banner {
  padding: 0;
  background: var(--bg-page);
}

.cta-inner {
  background:
    linear-gradient(115deg, rgba(6, 11, 23, 0.88), rgba(11, 19, 36, 0.62)),
    url("/assets/images/backpic/back-1.webp") center / cover no-repeat;
  border: 1px solid rgba(151, 181, 255, 0.16);
  border-radius: 26px;
  padding: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  min-height: 230px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.cta-inner::before {
  content: "";
  position: absolute;
  width: 250px;
  height: 250px;
  right: -60px;
  top: -70px;
  border-radius: 50%;
  border: 1px solid rgba(61, 127, 255, 0.3);
  box-shadow: 0 0 0 30px rgba(61, 127, 255, 0.04), 0 0 0 60px rgba(61, 127, 255, 0.025);
}

.cta-inner h2 {
  font-size: 28px;
  line-height: 1.3;
  margin-bottom: 10px;
}

.cta-inner .cta-text {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
  max-width: 600px;
}

.cta-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  flex-shrink: 0;
}

/* ============ Footer ============ */
.site-footer {
  background: #060B17;
  border-top: 1px solid var(--line);
  padding: 70px 0 28px;
  position: relative;
}

.footer-huge {
  font-size: clamp(74px, 12vw, 180px);
  font-weight: 800;
  line-height: 0.9;
  text-align: center;
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  background-image: linear-gradient(180deg, rgba(235, 242, 255, 0.1), rgba(235, 242, 255, 0.022));
  margin-bottom: -0.22em;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.06em;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  margin-top: 8px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  margin-top: 14px;
  max-width: 360px;
}

.footer-brand .chip {
  margin-top: 10px;
}

.footer-col h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
  color: #EAF3FF;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col a:hover {
  color: var(--sky);
  padding-left: 5px;
}

.footer-bottom {
  margin-top: 55px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--text-weak);
  font-size: 13px;
  line-height: 1.6;
}

/* ============ Responsive ============ */
@media (max-width: 1100px) {
  .doc-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .header-inner {
    gap: 16px;
  }

  .nav-chip {
    padding: 0 12px;
  }
}

@media (max-width: 860px) {
  .support-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 36px;
  }

  .steps::before {
    display: none;
  }

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

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

@media (max-width: 767px) {
  .section {
    padding: 60px 0;
  }

  .container,
  .hero-caption {
    width: calc(100% - 40px);
  }

  .header-cta.btn-sm {
    margin-left: auto;
  }

  .brand {
    font-size: 18px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: fixed;
    top: 76px;
    left: 16px;
    right: 16px;
    z-index: 200;
    display: grid;
    grid-template-columns: 1fr;
    background: rgba(10, 18, 32, 0.94);
    border: 1px solid rgba(151, 181, 255, 0.2);
    border-radius: 18px;
    padding: 12px;
    gap: 4px;
    margin-left: 0;
    opacity: 0;
    transform: translateY(-14px);
    visibility: hidden;
    transition: all 0.26s ease;
    box-shadow: 0 30px 70px rgba(1, 5, 15, 0.6);
    -webkit-backdrop-filter: blur(24px) saturate(150%);
    backdrop-filter: blur(24px) saturate(150%);
  }

  .main-nav.nav-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-chip,
  .nav-chip.active {
    width: 100%;
    justify-content: center;
    height: 46px;
  }

  .hero-caption {
    padding: 68px 0 70px;
  }

  .hero-caption h1 {
    font-size: 34px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .doc-topics-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .doc-card-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 34px 26px;
  }

  .cta-btns {
    width: 100%;
  }

  .cta-btns a {
    flex: 1;
  }

  .faq-item summary {
    font-size: 16px;
    padding: 18px 18px;
  }

  .faq-item .answer {
    padding: 4px 18px 20px;
  }
}

@media (max-width: 520px) {
  .section-head h2 {
    font-size: 26px;
  }

  .note-grid,
  .steps {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-btns {
    flex-direction: column;
  }

  .cta-btns a {
    width: 100%;
  }
}