/* roulang page: index */
:root{
  --bg:#070b14;
  --bg-soft:#0b1120;
  --surface:#101a2c;
  --surface-2:#14203a;
  --line:rgba(96,165,250,.16);
  --line-strong:rgba(96,165,250,.34);
  --text:#e9f1ff;
  --muted:#93a6c6;
  --accent:#2ee6a8;
  --accent-2:#4aa8ff;
  --warn:#ffb545;
  --danger:#ff5f74;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 20px 46px rgba(2,8,20,.55);
  --container:1180px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--text);
  line-height:1.75;
  background:
    radial-gradient(1100px 560px at 88% -12%, rgba(46,230,168,.10), transparent 62%),
    radial-gradient(900px 520px at -8% 0%, rgba(74,168,255,.12), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .22s ease,background .22s ease,border-color .22s ease;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:8px;}
h1,h2,h3,h4{margin:0;line-height:1.32;font-weight:700;letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.site-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}
.tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:.6px;
  color:var(--accent);background:rgba(46,230,168,.09);
  border:1px solid rgba(46,230,168,.28);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
}
.btn-neon{background:linear-gradient(135deg,#2ee6a8,#28c8ff);color:#04120c;box-shadow:0 10px 28px rgba(46,230,168,.28);}
.btn-neon:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(46,230,168,.42);color:#04120c;}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line-strong);color:var(--text);}
.btn-ghost:hover{background:rgba(74,168,255,.14);border-color:rgba(74,168,255,.55);transform:translateY(-2px);}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;position:relative;
  background:rgba(7,11,20,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
  font-weight:800;font-size:18px;color:#04120c;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 0 24px rgba(46,230,168,.45);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:17px;letter-spacing:.6px;}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:1.4px;}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;padding:10px 15px;border-radius:10px;
  color:var(--muted);font-size:15px;transition:.24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(74,168,255,.10);}
.nav-link.active{color:var(--accent);}
.nav-link.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 12px var(--accent);
}
.nav-cta{padding:10px 20px;font-size:14px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:11px;font-size:20px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);cursor:pointer;
  transition:.22s ease;
}
.nav-toggle:hover{background:rgba(74,168,255,.14);border-color:var(--line-strong);}

/* hero */
.hero{position:relative;padding:70px 0 78px;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(74,168,255,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(74,168,255,.055) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(circle at 72% 26%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 72% 26%,#000 0%,transparent 72%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:52px;align-items:center;}
.hero-copy h1{font-size:clamp(27px,3.2vw,40px);margin:18px 0 18px;letter-spacing:.4px;}
.hero-copy h1 span{color:var(--accent);}
.hero-lead{color:var(--muted);font-size:16px;line-height:1.9;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 16px;}
.hero-note{font-size:13px;color:rgba(147,166,198,.86);}
.hero-panel{
  background:linear-gradient(162deg,rgba(20,32,58,.96),rgba(9,15,28,.99));
  border:1px solid var(--line-strong);border-radius:22px;padding:24px;
  box-shadow:var(--shadow);
}
.panel-head{display:flex;align-items:center;gap:9px;padding-bottom:16px;border-bottom:1px dashed var(--line);font-size:14px;color:var(--muted);}
.panel-head em{font-style:normal;margin-left:auto;font-size:12px;color:var(--accent);border:1px solid rgba(46,230,168,.3);padding:2px 9px;border-radius:999px;}
.panel-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);}
.scale-list{display:grid;gap:16px;margin:20px 0;}
.scale-item{display:grid;grid-template-columns:44px minmax(0,1fr);grid-template-rows:auto auto;column-gap:14px;row-gap:6px;align-items:center;min-width:0;}
.scale-label{font-weight:700;font-size:16px;grid-row:1 / span 2;color:var(--text);}
.scale-bar{height:8px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden;min-width:0;}
.scale-bar i{display:block;height:100%;border-radius:999px;}
.scale-item.safe .scale-bar i{background:linear-gradient(90deg,#2ee6a8,#4ad9c0);}
.scale-item.normal .scale-bar i{background:linear-gradient(90deg,#4aa8ff,#7cd4ff);}
.scale-item.risky .scale-bar i{background:linear-gradient(90deg,#ffb545,#ff5f74);}
.scale-note{font-size:12.5px;color:var(--muted);line-height:1.5;}
.panel-foot{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding-top:16px;border-top:1px dashed var(--line);}
.panel-foot div{min-width:0;}
.panel-foot span{display:block;font-size:12px;color:var(--muted);}
.panel-foot b{font-size:15px;color:var(--text);}
.panel-tip{margin-top:14px;font-size:12.5px;color:rgba(255,181,69,.9);line-height:1.6;}

/* sections */
.section{padding:74px 0;}
.section-alt{background:linear-gradient(180deg,rgba(11,17,32,.92),rgba(7,11,20,.5));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin:0 auto 42px;text-align:center;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);margin:16px 0 14px;}
.section-head p{color:var(--muted);font-size:15px;line-height:1.9;}
.section-head.left{margin-left:0;text-align:left;}

/* value grid */
.value-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.value-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;min-width:0;
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.value-card:hover{transform:translateY(-5px);border-color:rgba(46,230,168,.42);box-shadow:0 18px 40px rgba(0,0,0,.42);}
.value-index{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px;}
.value-card h3{font-size:17px;margin:10px 0 10px;}
.value-card p{font-size:14px;color:var(--muted);line-height:1.85;}

/* download */
.download-panel{
  background:linear-gradient(135deg,rgba(46,230,168,.10),rgba(74,168,255,.09));
  border:1px solid rgba(46,230,168,.30);border-radius:24px;padding:42px 38px;
  box-shadow:var(--shadow);
}
.download-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:18px;margin-bottom:28px;}
.download-head h2{font-size:clamp(22px,2.4vw,29px);}
.download-head p{flex:1 1 320px;min-width:0;color:var(--muted);font-size:14.5px;line-height:1.85;}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.dl-card{
  display:flex;flex-direction:column;gap:12px;min-width:0;
  background:rgba(9,15,28,.82);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(46,230,168,.5);box-shadow:0 16px 34px rgba(0,0,0,.42);}
.dl-icon{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  font-size:13px;font-weight:700;letter-spacing:.5px;color:#04120c;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
}
.dl-card h3{font-size:16.5px;}
.dl-card p{font-size:13.5px;color:var(--muted);line-height:1.75;}
.dl-link{
  margin-top:auto;display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:11px 18px;border-radius:11px;font-size:14px;font-weight:600;
  color:var(--accent);border:1px solid rgba(46,230,168,.38);background:rgba(46,230,168,.08);
}
.dl-link:hover{background:rgba(46,230,168,.18);border-color:rgba(46,230,168,.7);color:var(--accent);}

/* feature split */
.feature-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center;}
.feature-list{display:grid;gap:18px;margin-top:26px;}
.feature-item{display:grid;grid-template-columns:34px minmax(0,1fr);gap:14px;min-width:0;}
.feature-dot{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  font-size:13px;font-weight:700;color:var(--accent);
  background:rgba(46,230,168,.10);border:1px solid rgba(46,230,168,.28);
}
.feature-item h3{font-size:16px;margin-bottom:6px;}
.feature-item p{font-size:14px;color:var(--muted);line-height:1.8;}
.console{background:linear-gradient(166deg,rgba(20,32,58,.96),rgba(8,13,25,.99));border:1px solid var(--line-strong);border-radius:20px;box-shadow:var(--shadow);overflow:hidden;}
.console-bar{display:flex;align-items:center;gap:7px;padding:14px 18px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.02);}
.console-bar span{width:9px;height:9px;border-radius:50%;background:rgba(147,166,198,.4);}
.console-bar span:nth-child(1){background:#ff5f74;}
.console-bar span:nth-child(2){background:#ffb545;}
.console-bar span:nth-child(3){background:#2ee6a8;}
.console-bar em{margin-left:auto;font-style:normal;font-size:12px;color:var(--muted);}
.console-body{padding:22px;}
.console-row{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:11px 0;border-bottom:1px dashed rgba(96,165,250,.14);font-size:14px;}
.console-row:last-of-type{border-bottom:none;}
.console-row span{color:var(--muted);}
.console-row b{color:var(--text);font-size:15px;}
.console-meter{height:12px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden;margin:16px 0 10px;}
.console-meter i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#2ee6a8,#4aa8ff);}
.console-note{font-size:12.5px;color:rgba(147,166,198,.85);line-height:1.6;}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.step-card{
  position:relative;min-width:0;padding:32px 24px 26px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease;
}
.step-card:hover{transform:translateY(-4px);border-color:rgba(74,168,255,.45);}
.step-num{
  display:inline-grid;place-items:center;width:44px;height:44px;border-radius:13px;
  font-weight:800;font-size:18px;color:#04120c;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 0 22px rgba(46,230,168,.3);
}
.step-card h3{font-size:17px;margin:16px 0 10px;}
.step-card p{font-size:14px;color:var(--muted);line-height:1.85;}

/* spec table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);}
.spec-table,.compare-table{width:100%;border-collapse:collapse;min-width:640px;}
.spec-table th,.compare-table th{
  text-align:left;font-size:14px;font-weight:600;color:var(--accent);
  padding:16px 18px;background:rgba(46,230,168,.06);border-bottom:1px solid var(--line);white-space:nowrap;
}
.spec-table td,.compare-table td{
  padding:15px 18px;font-size:14px;color:var(--muted);
  border-bottom:1px solid rgba(96,165,250,.10);line-height:1.8;
}
.spec-table tr:last-child td,.compare-table tr:last-child td{border-bottom:none;}
.spec-table td:first-child,.compare-table td:first-child{color:var(--text);font-weight:600;white-space:nowrap;}
.compare-table .highlight-col{background:rgba(46,230,168,.07);color:var(--text);}

/* risk */
.risk-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.risk-card{
  min-width:0;padding:26px 22px;border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(255,95,116,.08),rgba(16,26,44,.9));
  border:1px solid rgba(255,95,116,.24);
}
.risk-card h3{font-size:16px;margin-bottom:10px;color:#ffd0d6;}
.risk-card p{font-size:14px;color:var(--muted);line-height:1.85;}

/* scene */
.scene-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.scene-card{
  min-width:0;padding:26px 22px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(46,230,168,.42);box-shadow:0 16px 34px rgba(0,0,0,.4);}
.scene-card h3{font-size:16px;margin-bottom:10px;}
.scene-card p{font-size:14px;color:var(--muted);line-height:1.85;}

/* myth */
.myth-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.myth-item{
  display:grid;grid-template-columns:30px minmax(0,1fr);gap:14px;min-width:0;
  padding:24px 22px;border-radius:var(--radius);
  background:rgba(16,26,44,.7);border:1px solid var(--line);
}
.myth-mark{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:14px;font-weight:800;color:var(--warn);
  background:rgba(255,181,69,.12);border:1px solid rgba(255,181,69,.32);
}
.myth-item h3{font-size:15.5px;margin-bottom:8px;}
.myth-item p{font-size:14px;color:var(--muted);line-height:1.8;}

/* category wall */
.cat-wall{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;}
.cat-card{
  display:flex;flex-wrap:wrap;align-items:center;gap:22px;min-width:0;
  padding:32px 30px;border-radius:var(--radius);
  background:linear-gradient(135deg,rgba(74,168,255,.12),rgba(16,26,44,.94));
  border:1px solid var(--line-strong);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(46,230,168,.5);box-shadow:0 18px 40px rgba(0,0,0,.42);}
.cat-card-body{flex:1 1 380px;min-width:0;}
.cat-card h3{font-size:19px;margin-bottom:10px;}
.cat-card p{font-size:14px;color:var(--muted);line-height:1.85;}
.cat-card-arrow{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:11px;font-size:14px;font-weight:600;
  color:var(--accent);border:1px solid rgba(46,230,168,.4);background:rgba(46,230,168,.09);
}

/* faq */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--surface);overflow:hidden;transition:border-color .25s ease;
}
.faq-item[open]{border-color:rgba(46,230,168,.42);}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 52px 18px 22px;position:relative;
  font-size:15.5px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--accent);transition:transform .25s ease;
}
.faq-item[open] summary::after{content:"−";}
.faq-item p{padding:0 22px 20px;font-size:14px;color:var(--muted);line-height:1.9;}

/* cms news */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.news-card{
  display:flex;flex-direction:column;gap:12px;min-width:0;
  padding:24px 22px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(74,168,255,.45);box-shadow:0 16px 34px rgba(0,0,0,.42);}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12.5px;}
.news-tag{color:var(--accent);background:rgba(46,230,168,.10);border:1px solid rgba(46,230,168,.26);padding:2px 10px;border-radius:999px;}
.news-date{color:rgba(147,166,198,.8);}
.news-card h3{font-size:16px;line-height:1.55;}
.news-card h3 a:hover{color:var(--accent);}
.news-card p{font-size:14px;color:var(--muted);line-height:1.8;flex:1 1 auto;}
.news-more{font-size:13.5px;font-weight:600;color:var(--accent-2);}
.news-more:hover{color:var(--accent);}
.empty-tip{text-align:center;color:var(--muted);font-size:14.5px;padding:34px 0;}

/* footer */
.site-footer{background:rgba(6,10,18,.96);border-top:1px solid var(--line);padding:56px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;}
.footer-brand strong{display:block;font-size:17px;margin:14px 0 12px;letter-spacing:.4px;}
.footer-brand p{font-size:13.5px;color:var(--muted);line-height:1.85;max-width:400px;}
.footer-col h4{font-size:14.5px;margin-bottom:16px;color:var(--text);}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--muted);}
.footer-col a:hover{color:var(--accent);}
.footer-risk{
  margin-top:38px;padding:16px 20px;border-radius:var(--radius-sm);
  background:rgba(255,95,116,.07);border:1px solid rgba(255,95,116,.2);
  font-size:12.5px;color:rgba(255,208,214,.86);line-height:1.85;
}
.footer-bottom{
  margin-top:24px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:12.5px;color:rgba(147,166,198,.8);
}

@media (max-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:38px;}
  .value-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .risk-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .feature-split{grid-template-columns:minmax(0,1fr);gap:34px;}
  .download-panel{padding:34px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:900px){
  .site-nav{
    position:absolute;left:0;right:0;top:74px;margin-left:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(8,13,24,.99);border-bottom:1px solid var(--line);
    padding:12px 16px 16px;display:none;
  }
  .site-nav.open{display:flex;}
  .nav-link{padding:12px 14px;}
  .nav-link.active::after{left:14px;right:auto;width:22px;bottom:7px;}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .hero{padding:48px 0 56px;}
  .steps{grid-template-columns:minmax(0,1fr);}
  .download-grid{grid-template-columns:minmax(0,1fr);}
  .myth-list{grid-template-columns:minmax(0,1fr);}
  .news-grid{grid-template-columns:minmax(0,1fr);}
  .risk-grid{grid-template-columns:minmax(0,1fr);}
  .scene-grid{grid-template-columns:minmax(0,1fr);}
  .value-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .brand-text em{display:none;}
  .hero-copy h1{font-size:26px;}
  .download-head h2{font-size:22px;}
}
@media (max-width:520px){
  .site-container{padding:0 16px;}
  .header-inner{min-height:66px;}
  .site-nav{top:66px;}
  .hero-actions .btn{width:100%;}
  .cat-card{padding:26px 20px;}
  .cat-card-arrow{width:100%;justify-content:center;}
  .download-panel{padding:26px 18px;}
  .panel-foot{grid-template-columns:minmax(0,1fr);}
}

/* roulang page: article */
:root{
  --bg:#070b14;
  --bg-soft:#0b1120;
  --surface:#101a2c;
  --surface-2:#14203a;
  --line:rgba(96,165,250,.16);
  --line-strong:rgba(96,165,250,.34);
  --text:#e9f1ff;
  --muted:#93a6c6;
  --accent:#2ee6a8;
  --accent-2:#4aa8ff;
  --warn:#ffb545;
  --danger:#ff5f74;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 20px 46px rgba(2,8,20,.55);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--text);
  line-height:1.75;
  background:
    radial-gradient(1100px 560px at 88% -12%, rgba(46,230,168,.10), transparent 62%),
    radial-gradient(900px 520px at -8% 0%, rgba(74,168,255,.12), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .22s ease,background .22s ease,border-color .22s ease;}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.4;}
ul,ol{margin:0;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:8px;}
.site-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}
.tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:.6px;
  color:var(--accent);background:rgba(46,230,168,.09);
  border:1px solid rgba(46,230,168,.28);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;line-height:1.4;
  text-decoration:none;box-shadow:none;
  transition:transform .22s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
}
.btn-neon{
  background-color:#2ee6a8;
  background-image:linear-gradient(135deg,#2ee6a8,#28c8ff);
  color:#04120c;box-shadow:0 10px 28px rgba(46,230,168,.28);
}
.btn-neon:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(46,230,168,.42);color:#04120c;}
.btn-ghost{
  background-color:rgba(255,255,255,.03);border-color:var(--line-strong);color:var(--text);
}
.btn-ghost:hover{background-color:rgba(74,168,255,.14);border-color:rgba(74,168,255,.55);transform:translateY(-2px);color:var(--text);}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;box-shadow:none;}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,20,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
  font-weight:800;font-size:18px;color:#04120c;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 0 24px rgba(46,230,168,.45);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:17px;letter-spacing:.6px;}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:1.4px;}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;padding:10px 15px;border-radius:10px;
  color:var(--muted);font-size:15px;transition:.24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(74,168,255,.10);}
.nav-link.active{color:var(--accent);}
.nav-link.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 12px var(--accent);
}
.nav-cta{padding:10px 20px;font-size:14px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:11px;font-size:20px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);cursor:pointer;
  transition:.22s ease;
}
.nav-toggle:hover{background:rgba(74,168,255,.14);border-color:var(--line-strong);}

/* article hero */
.article-hero{
  position:relative;padding:44px 0 40px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(760px 320px at 82% -30%, rgba(46,230,168,.12), transparent 66%),
    linear-gradient(180deg, rgba(11,17,32,.75), rgba(7,11,20,.25));
}
.crumb-trail{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px;}
.crumb-trail a{color:var(--muted);}
.crumb-trail a:hover{color:var(--accent);}
.crumb-trail .sep{color:rgba(147,166,198,.5);}
.crumb-trail .current{color:rgba(233,241,255,.82);}
.article-title{
  font-size:clamp(24px,3vw,36px);line-height:1.45;letter-spacing:.3px;
  margin:16px 0 18px;max-width:960px;overflow-wrap:break-word;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:13.5px;color:var(--muted);}
.article-meta .meta-chip{
  display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;
  background:rgba(74,168,255,.08);border:1px solid var(--line);color:rgba(233,241,255,.86);
}
.article-meta .meta-chip i{font-style:normal;color:var(--accent-2);}
.article-meta time{color:rgba(233,241,255,.86);}

/* main */
.article-main{padding:52px 0 74px;}
.article-wrap{max-width:920px;margin:0 auto;}
.insight-bar{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;
  padding:20px 22px;margin-bottom:38px;
  background:linear-gradient(140deg,rgba(20,32,58,.9),rgba(9,15,28,.96));
  border:1px solid var(--line-strong);border-radius:var(--radius);box-shadow:var(--shadow);
}
.insight-item{display:flex;gap:12px;min-width:0;align-items:flex-start;}
.insight-dot{
  flex:0 0 auto;width:30px;height:30px;border-radius:10px;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:var(--accent);
  background:rgba(46,230,168,.12);border:1px solid rgba(46,230,168,.3);
}
.insight-item strong{display:block;font-size:14.5px;margin-bottom:3px;}
.insight-item span{display:block;font-size:13px;color:var(--muted);line-height:1.7;}

/* article body */
.article-body{
  font-size:16.5px;line-height:1.95;color:#dce7f8;
  overflow-wrap:break-word;word-break:normal;
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  position:relative;font-size:clamp(19px,2.2vw,23px);margin:38px 0 16px;padding-left:15px;
  color:var(--text);letter-spacing:.3px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--accent),var(--accent-2));
  box-shadow:0 0 14px rgba(46,230,168,.5);
}
.article-body h3{font-size:17.5px;margin:26px 0 12px;color:#eef5ff;}
.article-body h4{font-size:16px;margin:22px 0 10px;color:#eef5ff;}
.article-body p{margin:0 0 17px;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;}
.article-body li{margin-bottom:8px;color:#cfdcf1;}
.article-body strong{color:#ffffff;}
.article-body a{color:var(--accent-2);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--accent);}
.article-body img{border-radius:var(--radius-sm);border:1px solid var(--line);margin:20px auto;}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;border-left:3px solid var(--accent);
  background:rgba(46,230,168,.06);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:#c7d6ec;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 13px;text-align:left;vertical-align:top;}
.article-body th{background:rgba(74,168,255,.1);color:#eaf3ff;}
.article-body code{
  background:rgba(74,168,255,.12);padding:2px 6px;border-radius:6px;font-size:.92em;color:#bfe2ff;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:28px 0;}
.article-empty{
  padding:36px 26px;text-align:center;border:1px dashed var(--line-strong);border-radius:var(--radius);
  background:rgba(16,26,44,.7);
}
.article-empty h2{font-size:20px;margin-bottom:10px;}
.article-empty p{color:var(--muted);font-size:14.5px;margin-bottom:20px;}

/* blocks */
.block{margin-top:56px;}
.block-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:20px;}
.block-head h2{font-size:clamp(19px,2.2vw,23px);letter-spacing:.3px;}
.block-head span{font-size:13px;color:var(--muted);}

/* download */
.download-band{
  position:relative;overflow:hidden;
  padding:30px 28px;border-radius:22px;
  background:linear-gradient(145deg,rgba(20,32,58,.96),rgba(9,15,28,.99));
  border:1px solid var(--line-strong);box-shadow:var(--shadow);
}
.download-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle, rgba(46,230,168,.20), transparent 68%);
  pointer-events:none;
}
.download-band h2{font-size:clamp(19px,2.2vw,23px);margin-bottom:10px;}
.download-band p{color:var(--muted);font-size:14.5px;margin-bottom:22px;max-width:640px;}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;}
.dl-item{
  display:flex;flex-direction:column;gap:5px;min-width:0;
  padding:16px 18px;border-radius:14px;text-decoration:none;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);
  transition:transform .24s ease,border-color .24s ease,background .24s ease,box-shadow .24s ease;
}
.dl-item:hover{
  transform:translateY(-4px);border-color:rgba(46,230,168,.5);
  background:rgba(46,230,168,.09);box-shadow:0 16px 34px rgba(0,0,0,.42);color:var(--text);
}
.dl-item .dl-name{font-size:15px;font-weight:700;display:flex;align-items:center;gap:8px;}
.dl-item .dl-name i{font-style:normal;color:var(--accent);}
.dl-item .dl-file{font-size:12.5px;color:var(--muted);letter-spacing:.4px;}

/* metric cards */
.metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
.metric-card{
  min-width:0;padding:22px 20px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.metric-card:hover{transform:translateY(-5px);border-color:rgba(46,230,168,.42);box-shadow:0 18px 40px rgba(0,0,0,.42);}
.metric-card .m-label{
  display:inline-block;font-size:12px;letter-spacing:1px;color:var(--accent);
  padding:4px 10px;border-radius:999px;background:rgba(46,230,168,.1);
  border:1px solid rgba(46,230,168,.26);margin-bottom:14px;
}
.metric-card h3{font-size:16.5px;margin-bottom:9px;}
.metric-card p{font-size:14px;color:var(--muted);line-height:1.85;margin:0;}

/* related */
.related-list ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
.related-list li{
  min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.related-list li:hover{transform:translateY(-3px);border-color:rgba(74,168,255,.5);box-shadow:0 14px 32px rgba(0,0,0,.4);}
.related-list li a{display:block;padding:15px 18px;font-size:14.5px;color:#dbe7f8;line-height:1.7;overflow-wrap:break-word;}
.related-list li a:hover{color:var(--accent);}
.related-list a{color:#dbe7f8;}
.related-list a:hover{color:var(--accent);}

/* risk */
.risk-box{
  padding:22px 24px;border-radius:var(--radius);
  background:rgba(255,95,116,.06);border:1px solid rgba(255,95,116,.3);
}
.risk-box h2{font-size:17px;color:#ffc3cb;margin-bottom:10px;}
.risk-box p{font-size:14px;color:#e7c8ce;line-height:1.9;margin:0;}

/* end cta */
.end-cta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  padding:26px 28px;border-radius:22px;
  background:linear-gradient(135deg,rgba(46,230,168,.14),rgba(74,168,255,.12));
  border:1px solid rgba(46,230,168,.32);
}
.end-cta h2{font-size:19px;margin-bottom:6px;}
.end-cta p{font-size:14px;color:var(--muted);margin:0;}
.end-cta .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* footer */
.site-footer{
  margin-top:20px;padding:56px 0 28px;
  background:linear-gradient(180deg,rgba(9,15,28,.6),rgba(5,8,15,.96));
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr);gap:34px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand strong{display:block;font-size:15.5px;margin-bottom:10px;color:#eaf2ff;}
.footer-brand p{font-size:13.5px;color:var(--muted);line-height:1.9;margin:0;max-width:520px;}
.footer-col h4{font-size:14px;letter-spacing:1px;color:#dbe7f8;margin-bottom:14px;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;font-size:13.5px;}
.footer-col a{color:var(--muted);}
.footer-col a:hover{color:var(--accent);}
.footer-risk{
  margin-top:32px;padding:16px 18px;border-radius:var(--radius-sm);
  background:rgba(255,181,69,.06);border:1px solid rgba(255,181,69,.22);
  font-size:12.5px;color:#d9c6a4;line-height:1.9;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:22px;padding-top:18px;border-top:1px solid var(--line);
  font-size:12.5px;color:rgba(147,166,198,.8);
}

/* responsive */
@media (max-width:1024px){
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .insight-bar{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:860px){
  .site-nav{
    position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;
    align-items:stretch;gap:6px;margin-left:0;padding:14px 22px 18px;
    background:rgba(8,13,24,.98);border-bottom:1px solid var(--line);
    box-shadow:0 18px 40px rgba(0,0,0,.5);
  }
  .site-nav.is-open{display:flex;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-cta{display:none;}
  .nav-link{padding:12px 14px;}
  .nav-link.active::after{left:14px;right:auto;width:22px;}
}
@media (max-width:768px){
  .article-hero{padding:34px 0 30px;}
  .article-main{padding:38px 0 56px;}
  .dl-grid{grid-template-columns:1fr;}
  .metric-grid{grid-template-columns:1fr;}
  .insight-bar{grid-template-columns:1fr;padding:18px;}
  .related-list ul{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .end-cta{flex-direction:column;align-items:flex-start;}
  .block{margin-top:42px;}
}
@media (max-width:520px){
  .site-container{padding:0 16px;}
  .header-inner{min-height:66px;gap:12px;}
  .brand-mark{width:36px;height:36px;border-radius:11px;font-size:16px;}
  .brand-text strong{font-size:15.5px;}
  .brand-text em{font-size:10px;letter-spacing:1px;}
  .article-body{font-size:16px;line-height:1.9;}
  .download-band{padding:22px 18px;border-radius:18px;}
  .btn{padding:12px 20px;font-size:14.5px;width:100%;}
  .end-cta .cta-actions{width:100%;}
  .dl-item{padding:14px 16px;}
}

/* roulang page: category1 */
:root{
  --bg:#070b14;
  --bg-soft:#0b1120;
  --surface:#101a2c;
  --surface-2:#14203a;
  --line:rgba(96,165,250,.16);
  --line-strong:rgba(96,165,250,.34);
  --text:#e9f1ff;
  --muted:#93a6c6;
  --accent:#2ee6a8;
  --accent-2:#4aa8ff;
  --warn:#ffb545;
  --danger:#ff5f74;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 20px 46px rgba(2,8,20,.55);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--text);
  line-height:1.75;
  background:
    radial-gradient(1100px 560px at 88% -12%, rgba(46,230,168,.10), transparent 62%),
    radial-gradient(900px 520px at -8% 0%, rgba(74,168,255,.12), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .22s ease,background .22s ease,border-color .22s ease,transform .22s ease;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:8px;}
p{margin:0 0 12px;}
.site-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;}
.tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:.6px;
  color:var(--accent);background:rgba(46,230,168,.09);
  border:1px solid rgba(46,230,168,.28);
}
.tag-warn{color:var(--warn);background:rgba(255,181,69,.09);border-color:rgba(255,181,69,.3);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
}
.btn-neon{background:linear-gradient(135deg,#2ee6a8,#28c8ff);color:#04120c;box-shadow:0 10px 28px rgba(46,230,168,.28);}
.btn-neon:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(46,230,168,.42);color:#04120c;}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line-strong);color:var(--text);}
.btn-ghost:hover{background:rgba(74,168,255,.14);border-color:rgba(74,168,255,.55);transform:translateY(-2px);}
/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,20,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
  font-weight:800;font-size:18px;color:#04120c;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 0 24px rgba(46,230,168,.45);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:17px;letter-spacing:.6px;}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:1.4px;}
.site-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;padding:10px 15px;border-radius:10px;
  color:var(--muted);font-size:15px;transition:.24s ease;
}
.nav-link:hover{color:var(--text);background:rgba(74,168,255,.10);}
.nav-link.active{color:var(--accent);}
.nav-link.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 12px var(--accent);
}
.nav-cta{padding:10px 20px;font-size:14px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:11px;font-size:20px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);cursor:pointer;
  transition:.22s ease;
}
.nav-toggle:hover{background:rgba(74,168,255,.14);border-color:var(--line-strong);}
/* page hero */
.cat-hero{position:relative;padding:58px 0 70px;overflow:hidden;}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(74,168,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(74,168,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 78% 18%,#000 0%,transparent 70%);
  mask-image:radial-gradient(circle at 78% 18%,#000 0%,transparent 70%);
}
.cat-hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:46px;align-items:start;}
.cat-hero h1{font-size:clamp(26px,3vw,38px);line-height:1.35;margin:18px 0 16px;letter-spacing:.3px;}
.cat-hero h1 span{color:var(--accent);}
.cat-lead{color:var(--muted);font-size:15.5px;line-height:1.95;}
.cat-actions{display:flex;flex-wrap:wrap;gap:13px;margin:26px 0 16px;}
.cat-note{font-size:13px;color:rgba(147,166,198,.9);display:flex;gap:8px;align-items:flex-start;}
.cat-note i{color:var(--warn);font-style:normal;}
.param-panel{
  background:linear-gradient(162deg,rgba(20,32,58,.96),rgba(9,15,28,.99));
  border:1px solid var(--line-strong);border-radius:22px;padding:24px 22px;
  box-shadow:var(--shadow);min-width:0;
}
.param-panel h2{font-size:15px;letter-spacing:.8px;margin:0 0 6px;color:var(--accent);}
.param-panel .param-sub{font-size:12.5px;color:var(--muted);margin:0 0 18px;}
.param-row{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 14px;
  padding:13px 0;border-top:1px dashed rgba(96,165,250,.18);min-width:0;
}
.param-row:first-of-type{border-top:none;}
.param-row strong{font-size:14.5px;font-weight:600;}
.param-row em{font-style:normal;font-size:13px;color:var(--accent-2);white-space:nowrap;}
.param-row p{grid-column:1 / -1;margin:0;font-size:12.5px;color:var(--muted);line-height:1.75;}
.param-warn{margin-top:16px;padding:12px 14px;border-radius:12px;font-size:12.5px;line-height:1.8;
  color:#f3d4a4;background:rgba(255,181,69,.08);border:1px solid rgba(255,181,69,.26);}
/* sections */
.section{padding:70px 0;}
.section-alt{background:linear-gradient(180deg,rgba(11,17,32,.92),rgba(7,11,20,.5));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:780px;margin:0 auto 40px;text-align:center;}
.section-head h2{font-size:clamp(21px,2.3vw,29px);margin:15px 0 13px;}
.section-head p{color:var(--muted);font-size:14.5px;line-height:1.9;margin:0;}
.section-head.left{margin-left:0;text-align:left;}
/* concept */
.concept-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.concept-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;min-width:0;
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.concept-card:hover{transform:translateY(-5px);border-color:rgba(46,230,168,.42);box-shadow:0 18px 40px rgba(0,0,0,.42);}
.concept-num{
  display:inline-grid;place-items:center;width:36px;height:36px;border-radius:11px;
  font-size:14px;font-weight:700;color:#04120c;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
}
.concept-card h3{font-size:16.5px;margin:14px 0 10px;}
.concept-card p{font-size:13.8px;color:var(--muted);line-height:1.85;margin:0;}
/* leverage math */
.lev-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.lev-card{
  background:linear-gradient(160deg,rgba(20,32,58,.92),rgba(10,16,29,.96));
  border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;min-width:0;
  transition:border-color .26s ease,transform .26s ease;
}
.lev-card:hover{transform:translateY(-4px);border-color:rgba(74,168,255,.5);}
.lev-head{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:14px;font-weight:600;}
.lev-head em{
  font-style:normal;font-size:11.5px;padding:3px 9px;border-radius:999px;
  color:var(--accent-2);background:rgba(74,168,255,.12);border:1px solid rgba(74,168,255,.28);
  white-space:nowrap;
}
.lev-card.danger .lev-head em{color:var(--danger);background:rgba(255,95,116,.12);border-color:rgba(255,95,116,.3);}
.lev-value{font-size:22px;font-weight:700;margin:16px 0 6px;color:var(--text);letter-spacing:.5px;}
.lev-card.danger .lev-value{color:var(--danger);}
.lev-note{font-size:12.8px;color:var(--muted);line-height:1.75;margin:0;}
.math-note{
  margin-top:24px;padding:16px 20px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:rgba(74,168,255,.06);
  font-size:13px;color:var(--muted);line-height:1.85;
}
/* ratio */
.ratio-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.ratio-card{
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;min-width:0;
}
.ratio-card h3{font-size:16.5px;margin:0 0 6px;}
.ratio-card .ratio-def{font-size:13px;color:var(--accent-2);margin:0 0 14px;}
.ratio-card ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.ratio-card li{
  position:relative;padding-left:18px;font-size:13.6px;color:var(--muted);line-height:1.8;
}
.ratio-card li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 10px rgba(46,230,168,.7);
}
/* steps */
.step-flow{display:grid;gap:14px;}
.step-row{
  display:grid;grid-template-columns:56px minmax(0,1fr);gap:18px;align-items:start;
  padding:22px 22px;border-radius:var(--radius);
  background:rgba(16,26,44,.9);border:1px solid var(--line);
  transition:border-color .24s ease,background .24s ease,transform .24s ease;
}
.step-row:hover{border-color:rgba(46,230,168,.4);background:rgba(20,32,58,.92);transform:translateX(4px);}
.step-idx{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;
  font-size:16px;font-weight:700;color:var(--accent);
  background:rgba(46,230,168,.1);border:1px solid rgba(46,230,168,.32);
}
.step-body h3{font-size:16px;margin:0 0 8px;}
.step-body p{font-size:13.8px;color:var(--muted);line-height:1.85;margin:0;}
/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.scene-card{
  padding:26px 22px;border-radius:var(--radius);min-width:0;
  background:linear-gradient(165deg,rgba(20,32,58,.9),rgba(9,15,28,.96));
  border:1px solid var(--line);
  transition:transform .26s ease,border-color .26s ease;
}
.scene-card:hover{transform:translateY(-5px);border-color:rgba(74,168,255,.5);}
.scene-card h3{font-size:16.5px;margin:0 0 10px;}
.scene-card p{font-size:13.8px;color:var(--muted);line-height:1.85;margin:0;}
/* pitfalls */
.pit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.pit-card{
  padding:24px 22px;border-radius:var(--radius);min-width:0;
  background:rgba(255,95,116,.055);border:1px solid rgba(255,95,116,.22);
}
.pit-card h3{font-size:16px;margin:0 0 10px;color:#ffd2d9;}
.pit-card p{font-size:13.6px;color:var(--muted);line-height:1.85;margin:0;}
/* download */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.dl-card{
  display:flex;flex-direction:column;gap:12px;min-width:0;
  padding:26px 22px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.dl-card:hover{transform:translateY(-5px);border-color:rgba(46,230,168,.45);box-shadow:0 18px 40px rgba(0,0,0,.45);}
.dl-card h3{font-size:16.5px;margin:0;}
.dl-card p{font-size:13.4px;color:var(--muted);margin:0;line-height:1.8;}
.dl-card .btn{width:100%;margin-top:4px;}
.dl-file{font-size:12px;color:rgba(147,166,198,.8);font-family:ui-monospace,Menlo,Consolas,monospace;}
/* cms list */
.cms-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.cms-card{
  display:flex;flex-direction:column;gap:10px;min-width:0;
  padding:24px 22px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .26s ease,border-color .26s ease;
}
.cms-card:hover{transform:translateY(-5px);border-color:rgba(46,230,168,.42);}
.cms-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--accent-2);}
.cms-meta i{font-style:normal;color:rgba(147,166,198,.6);}
.cms-card h3{font-size:16px;margin:0;line-height:1.6;}
.cms-card p{font-size:13.4px;color:var(--muted);margin:0;line-height:1.8;}
.cms-more{font-size:13px;color:var(--accent);margin-top:auto;}
.cms-empty{
  grid-column:1 / -1;padding:28px;border-radius:var(--radius);text-align:center;
  border:1px dashed var(--line-strong);color:var(--muted);font-size:14px;
}
/* faq */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(16,26,44,.85);padding:4px 20px;transition:border-color .24s ease,background .24s ease;
}
.faq-item[open]{border-color:rgba(46,230,168,.4);background:rgba(20,32,58,.9);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:16px 0;font-size:15.5px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:20px;color:var(--accent);flex:0 0 auto;line-height:1;
}
.faq-item[open] summary::after{content:"−";}
.faq-item p{font-size:14px;color:var(--muted);line-height:1.9;margin:0 0 16px;}
/* cta band */
.cta-band{
  display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:24px;align-items:center;
  padding:34px 32px;border-radius:22px;
  background:linear-gradient(135deg,rgba(46,230,168,.12),rgba(74,168,255,.12));
  border:1px solid rgba(46,230,168,.3);
}
.cta-band h2{font-size:clamp(19px,2.1vw,25px);margin:0 0 10px;}
.cta-band p{font-size:14px;color:var(--muted);margin:0;line-height:1.9;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}
/* footer */
.site-footer{
  background:linear-gradient(180deg,rgba(9,15,28,.6),rgba(5,8,15,.98));
  border-top:1px solid var(--line);padding:56px 0 26px;
}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);
  gap:32px;padding-bottom:28px;border-bottom:1px solid var(--line);
}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand strong{display:block;font-size:15.5px;margin-bottom:8px;}
.footer-brand p{color:var(--muted);font-size:13.4px;line-height:1.9;margin:0;max-width:520px;}
.footer-col h4{font-size:14px;margin:0 0 14px;letter-spacing:.5px;}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;}
.footer-col a{color:var(--muted);font-size:13.4px;}
.footer-col a:hover{color:var(--accent);}
.footer-risk{
  margin:22px 0;padding:16px 18px;border-radius:var(--radius-sm);
  border:1px solid rgba(255,181,69,.26);background:rgba(255,181,69,.07);
  color:#e7cfa6;font-size:12.8px;line-height:1.85;
}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  color:var(--muted);font-size:12.8px;padding-top:6px;
}
/* responsive */
@media (max-width:1024px){
  .cat-hero-grid{grid-template-columns:minmax(0,1fr);gap:34px;}
  .concept-grid,.lev-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .ratio-grid,.scene-grid,.pit-grid,.dl-grid,.cms-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
  .cta-band{grid-template-columns:minmax(0,1fr);}
  .cta-actions{justify-content:flex-start;}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex;margin-left:8px;}
  .site-nav{
    position:absolute;top:74px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    padding:12px 18px 18px;display:none;
    background:rgba(7,11,20,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 22px 40px rgba(2,8,20,.6);
  }
  .site-nav.open{display:flex;}
  .nav-link{padding:12px 14px;}
  .nav-link.active::after{left:14px;right:auto;width:22px;}
  .nav-cta{margin-left:auto;}
}
@media (max-width:768px){
  .section{padding:54px 0;}
  .cat-hero{padding:44px 0 54px;}
  .concept-grid,.lev-grid,.ratio-grid,.scene-grid,.pit-grid,.dl-grid,.cms-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .step-row{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:18px 16px;}
  .step-idx{width:40px;height:40px;border-radius:11px;font-size:14px;}
  .cta-band{padding:26px 20px;}
  .nav-cta{display:none;}
  .header-inner{min-height:66px;}
  .site-nav{top:66px;}
}
@media (max-width:520px){
  .site-container{padding:0 16px;}
  .cat-hero h1{font-size:23px;}
  .btn{padding:12px 18px;font-size:14px;width:100%;}
  .cat-actions{flex-direction:column;}
  .cta-actions{width:100%;}
  .param-panel{padding:20px 16px;}
  .brand-text em{display:none;}
  .lev-value{font-size:19px;}
}