/* roulang page: index */
:root{
  --bg-void:#060917;
  --bg-deep:#0A0F26;
  --panel:#111735;
  --panel-2:#0C1130;
  --nebula:#6C4BF6;
  --nebula-dark:#5A3AD9;
  --nebula-light:#9C86FF;
  --aurora:#3FE0C8;
  --stardust:#F2C879;
  --text:#E9EDFF;
  --text-2:#A6AECF;
  --muted:#6D769B;
  --line:rgba(255,255,255,.08);
  --line-strong:#1E2650;
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(255,255,255,.10);
  --r-card:16px;
  --r-inner:12px;
  --r-btn:12px;
  --r-badge:8px;
  --r-block:24px;
  --sh-sm:0 2px 8px rgba(0,0,0,.35);
  --sh-md:0 12px 32px rgba(4,8,28,.55);
  --sh-glow:0 0 0 1px rgba(108,75,246,.45), 0 10px 34px rgba(108,75,246,.28);
  --sh-aurora:0 0 0 1px rgba(63,224,200,.35), 0 8px 26px rgba(63,224,200,.20);
  --ease:cubic-bezier(.22,.61,.36,1);
  --grad-main:linear-gradient(135deg,#6C4BF6 0%,#4A7BF0 52%,#3FE0C8 100%);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-void);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
h1{font-size:clamp(32px,5vw,54px);line-height:1.25;font-weight:700;}
h2{font-size:clamp(24px,3.4vw,36px);line-height:1.35;font-weight:600;}
h3{font-size:clamp(18px,2vw,22px);line-height:1.5;font-weight:600;}
::selection{background:rgba(108,75,246,.45);color:#fff;}
:focus-visible{outline:2px solid var(--aurora);outline-offset:2px;}

.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%;}
.section{padding:64px 0;}
.section-tight{padding:32px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;color:var(--aurora);
  border:1px solid rgba(63,224,200,.30);
  background:rgba(63,224,200,.10);
  border-radius:var(--r-badge);
  padding:4px 12px;letter-spacing:.02em;
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.section-head p{color:var(--text-2);font-size:15px;max-width:620px;}
.section-head h2{margin-bottom:10px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  border-bottom:1px solid transparent;
  transition:background .32s var(--ease),backdrop-filter .32s var(--ease),border-color .32s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,9,23,.72);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;}
.logo{display:flex;align-items:center;gap:10px;min-height:44px;}
.logo-mark{width:34px;height:34px;flex:0 0 34px;color:var(--aurora);}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{font-size:16px;font-weight:600;letter-spacing:.02em;color:var(--text);}
.logo-text span{font-size:11px;color:var(--muted);letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  min-height:44px;padding:8px 13px;border-radius:8px;
  font-size:15px;color:var(--text-2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:5px;width:16px;height:2px;border-radius:2px;
  background:var(--aurora);opacity:0;transform:translateX(-50%) scaleX(.2);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{opacity:1;transform:translateX(-50%) scaleX(1);}
.nav-link.is-active{color:var(--text);background:rgba(108,75,246,.12);}
.nav-link.is-active::after{opacity:1;transform:translateX(-50%) scaleX(1);}
.nav-cta{margin-left:10px;}
.burger{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--glass-line);background:var(--glass);
  align-items:center;justify-content:center;
}
.burger span{display:block;width:18px;height:1.5px;background:var(--text);margin:3px auto;border-radius:2px;transition:transform .26s var(--ease);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:16px;font-weight:500;letter-spacing:.02em;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease),opacity .2s var(--ease);
}
.btn-primary{
  position:relative;overflow:hidden;color:#fff;
  background:var(--grad-main);box-shadow:var(--sh-glow);
}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;
  background:linear-gradient(90deg,rgba(255,255,255,0),rgba(255,255,255,.35),rgba(255,255,255,0));
  transform:skewX(-18deg);transition:left .16s linear;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(108,75,246,.55),0 16px 40px rgba(108,75,246,.40);}
.btn-primary:hover::after{left:120%;}
.btn-primary:active{transform:translateY(0);filter:brightness(.94);}
.btn-ghost{
  color:var(--text);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.04);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
}
.btn-ghost:hover{border-color:rgba(63,224,200,.40);box-shadow:0 0 0 1px rgba(63,224,200,.22),0 8px 24px rgba(63,224,200,.16);transform:translateY(-2px);}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--aurora);font-size:15px;min-height:44px;padding:0 4px;}
.btn-text i{display:inline-block;transition:transform .2s var(--ease);font-style:normal;}
.btn-text:hover i{transform:translateX(4px);}

/* ---------- Badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--r-badge);
  font-size:12px;font-weight:500;line-height:1.6;
  border:1px solid rgba(108,75,246,.45);background:rgba(108,75,246,.12);color:var(--nebula-light);
}
.badge-aurora{border-color:rgba(63,224,200,.40);background:rgba(63,224,200,.12);color:#8CF0DE;}
.badge-star{border-color:rgba(242,200,121,.42);background:rgba(242,200,121,.12);color:var(--stardust);}

/* ---------- Hero ---------- */
.hero{position:relative;padding:160px 0 96px;overflow:hidden;}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.42;z-index:0;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(60% 55% at 12% 18%,rgba(108,75,246,.30),rgba(6,9,23,0) 62%),
    radial-gradient(50% 50% at 88% 72%,rgba(63,224,200,.18),rgba(6,9,23,0) 60%),
    linear-gradient(180deg,rgba(6,9,23,.72) 0%,rgba(6,9,23,.88) 58%,var(--bg-void) 100%);
}
.hero-arc{position:absolute;left:0;right:0;top:120px;height:280px;z-index:1;pointer-events:none;opacity:.75;}
.hero-inner{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center;}
.hero h1{margin:18px 0 18px;}
.hero h1 em{font-style:normal;background:var(--grad-main);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{color:var(--text-2);font-size:17px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-facts{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  margin-top:44px;border-radius:var(--r-card);border:1px solid var(--glass-line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  overflow:hidden;
}
.fact{padding:18px 20px;border-right:1px solid var(--line);}
.fact:last-child{border-right:0;}
.fact b{display:block;font-size:22px;font-weight:600;color:var(--text);line-height:1.4;}
.fact span{font-size:12px;color:var(--muted);letter-spacing:.04em;}
.hero-panel{
  border-radius:var(--r-block);border:1px solid var(--line-strong);
  background:linear-gradient(180deg,#121838,#0C1130);
  box-shadow:var(--sh-md);padding:22px;
}
.hero-panel figure{border-radius:var(--r-inner);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9;}
.hero-panel figure img{width:100%;height:100%;object-fit:cover;object-position:center 30%;}
.hero-panel h3{margin:18px 0 10px;}
.checklist li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-2);padding:9px 0;border-top:1px solid var(--line);}
.checklist li:first-child{border-top:0;}
.checklist li::before{content:"";flex:0 0 6px;width:6px;height:6px;margin-top:11px;border-radius:2px;background:var(--aurora);}

/* ---------- Quick strip ---------- */
.quick-scroll{display:flex;gap:14px;overflow-x:auto;padding:4px 2px 10px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;}
.quick-scroll::-webkit-scrollbar{height:6px;}
.quick-scroll::-webkit-scrollbar-thumb{background:rgba(108,75,246,.45);border-radius:99px;}
.quick-card{
  scroll-snap-align:start;flex:0 0 200px;min-height:96px;
  display:flex;flex-direction:column;justify-content:space-between;gap:10px;
  padding:16px;border-radius:var(--r-card);
  border:1px solid var(--glass-line);background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.quick-card:hover{transform:translateY(-3px);border-color:rgba(108,75,246,.45);box-shadow:var(--sh-md);}
.quick-card i{display:block;width:26px;height:26px;color:var(--aurora);}
.quick-card span{font-size:15px;color:var(--text);}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;}
.step{position:relative;padding:22px 20px;border-radius:var(--r-card);border:1px solid var(--line-strong);background:linear-gradient(180deg,#121838,#0C1130);}
.step-idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:50%;font-size:14px;font-weight:600;color:#fff;
  background:var(--grad-main);box-shadow:0 6px 18px rgba(108,75,246,.32);
}
.step h3{margin:14px 0 8px;font-size:18px;}
.step p{font-size:14px;color:var(--text-2);}
.steps::before{content:none;}

/* ---------- Preview grid (2+3) ---------- */
.preview-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;}
.preview-large{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line-strong);background:linear-gradient(180deg,#121838,#0C1130);transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);}
.preview-large:hover,.preview-small:hover{transform:translateY(-3px);border-color:rgba(108,75,246,.45);box-shadow:var(--sh-md);}
.preview-large figure{aspect-ratio:16/10;overflow:hidden;border-bottom:1px solid var(--line);}
.preview-large figure img{width:100%;height:100%;object-fit:cover;object-position:center 40%;}
.preview-large .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.preview-large .body p{font-size:15px;color:var(--text-2);}
.preview-large .body .btn-text{margin-top:auto;}
.preview-small{
  grid-column:span 1;padding:20px;border-radius:var(--r-card);
  border:1px solid var(--line-strong);background:linear-gradient(180deg,#121838,#0C1130);
  display:flex;flex-direction:column;gap:10px;min-height:150px;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.preview-small h3{font-size:17px;}
.preview-small p{font-size:14px;color:var(--text-2);}
.preview-small .btn-text{margin-top:auto;}

/* ---------- Progress ---------- */
.progress-wrap{
  position:relative;border-radius:var(--r-block);
  border:1px solid var(--line-strong);background:linear-gradient(180deg,#121838,#0C1130);
  padding:32px 28px;overflow:hidden;
}
.progress-wrap::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--aurora),rgba(108,75,246,.2));
}
.progress-grid{display:grid;grid-template-columns:8fr 4fr;gap:36px;align-items:center;}
.track{height:6px;border-radius:999px;background:rgba(255,255,255,.08);position:relative;overflow:hidden;}
.track-fill{height:100%;width:0;border-radius:999px;background:var(--grad-main);transition:width .8s var(--ease);position:relative;}
.track-fill::after{content:"";position:absolute;right:0;top:50%;width:4px;height:4px;border-radius:50%;background:#fff;transform:translate(50%,-50%);box-shadow:0 0 10px 2px rgba(63,224,200,.7);}
.milestones{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:20px;}
.mile{display:flex;flex-direction:column;gap:8px;font-size:12px;color:var(--muted);}
.mile i{width:12px;height:12px;border-radius:50%;border:1px solid rgba(63,224,200,.55);display:block;}
.mile.done i{background:var(--aurora);border-color:var(--aurora);box-shadow:0 0 10px rgba(63,224,200,.55);}
.mile.done{color:var(--text-2);}
.stat-card{
  border-radius:var(--r-card);border:1px solid var(--glass-line);background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  padding:22px;
}
.stat-row{display:flex;align-items:baseline;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line);}
.stat-row:last-child{border-bottom:0;}
.stat-row b{font-size:24px;font-weight:600;}
.stat-row span{font-size:13px;color:var(--muted);}

/* ---------- News ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.news-card{
  display:flex;flex-direction:column;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line-strong);background:linear-gradient(180deg,#121838,#0C1130);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(108,75,246,.45);box-shadow:var(--sh-md);}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-thumb .badge{position:absolute;left:12px;top:12px;background:rgba(6,9,23,.62);border-color:rgba(255,255,255,.18);color:#DCE2FF;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);}
.news-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-body h3{font-size:18px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body p{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);margin-top:auto;padding-top:12px;border-top:1px solid var(--line);}
.empty-panel{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:48px 24px;border-radius:var(--r-card);text-align:center;
  border:1px solid var(--glass-line);background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
}
.empty-panel i{width:38px;height:38px;color:var(--muted);}
.empty-panel p{color:var(--text-2);font-size:15px;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;}
.faq-item{border-radius:var(--r-card);border:1px solid var(--line-strong);background:linear-gradient(180deg,#121838,#0C1130);overflow:hidden;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;font-size:17px;font-weight:600;color:var(--text);text-align:left;min-height:44px;
}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--aurora);border-radius:2px;transform:translate(-50%,-50%);transition:transform .26s var(--ease),opacity .26s var(--ease);}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease);}
.faq-a-inner{padding:4px 22px 20px;border-top:1px solid var(--line);margin-top:0;color:var(--text-2);font-size:16px;line-height:1.85;}
.faq-a-inner p{padding-top:14px;}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;border-radius:var(--r-block);padding:54px 40px;
  border:1px solid rgba(108,75,246,.42);
  background:
    radial-gradient(70% 120% at 12% 0%,rgba(108,75,246,.22),rgba(6,9,23,0) 60%),
    radial-gradient(60% 120% at 92% 100%,rgba(63,224,200,.16),rgba(6,9,23,0) 62%),
    linear-gradient(180deg,#121838,#0A0F26);
  box-shadow:var(--sh-md);overflow:hidden;
}
.cta-panel h2{margin-bottom:12px;max-width:720px;}
.cta-panel p{color:var(--text-2);max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-deep);margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding:56px 0 40px;}
.footer-brand p{color:var(--text-2);font-size:14px;margin-top:14px;max-width:280px;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--aurora);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{border-top:1px solid var(--line);padding:18px 0 30px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--aurora);}

/* ---------- Drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(3,5,14,.66);opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s var(--ease);z-index:95;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:360px;z-index:100;
  background:linear-gradient(180deg,#0C1130,#060917);
  border-left:1px solid var(--line-strong);
  transform:translateX(100%);transition:transform .26s var(--ease);
  display:flex;flex-direction:column;padding:20px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid var(--glass-line);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--text-2);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;flex:1;overflow-y:auto;}
.drawer-nav a{display:flex;align-items:center;min-height:52px;padding:0 12px;border-radius:10px;color:var(--text-2);font-size:16px;border-bottom:1px solid var(--line);}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--text);background:rgba(108,75,246,.12);}
.drawer-foot{padding-top:16px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

@media (max-width:1023px){
  .nav-links{display:none;}
  .burger{display:flex;}
  .hero{padding:124px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-arc{opacity:.35;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .preview-grid{grid-template-columns:repeat(2,1fr);}
  .preview-large{grid-column:span 2;grid-row:auto;}
  .preview-small{grid-column:span 1;}
  .progress-grid{grid-template-columns:1fr;gap:24px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .section{padding:56px 0;}
  .hero-facts{grid-template-columns:1fr;}
  .fact{border-right:0;border-bottom:1px solid var(--line);}
  .fact:last-child{border-bottom:0;}
  .milestones{grid-template-columns:repeat(2,1fr);}
  .cta-panel{padding:36px 22px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding:40px 0 28px;}
}
@media (max-width:639px){
  .steps{grid-template-columns:1fr;}
  .preview-grid{grid-template-columns:1fr;}
  .preview-large,.preview-small{grid-column:span 1;}
  .news-grid{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --bg-void:#060917;
  --bg-deep:#0A0F26;
  --panel:#111735;
  --panel-2:#0C1130;
  --nebula:#6C4BF6;
  --nebula-deep:#5A3AD9;
  --nebula-light:#9C86FF;
  --aurora:#3FE0C8;
  --stardust:#F2C879;
  --text:#E9EDFF;
  --text-2:#A6AECF;
  --muted:#6D769B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.10);
  --glass:rgba(255,255,255,.045);
  --grad:linear-gradient(135deg,#6C4BF6 0%,#4A7BF0 52%,#3FE0C8 100%);
  --r-card:16px;
  --r-btn:12px;
  --r-badge:8px;
  --r-wrap:24px;
  --shadow-sm:0 2px 8px rgba(0,0,0,.35);
  --shadow-md:0 12px 32px rgba(4,8,28,.55);
  --shadow-glow:0 0 0 1px rgba(108,75,246,.45),0 10px 34px rgba(108,75,246,.28);
  --shadow-aurora:0 0 0 1px rgba(63,224,200,.35),0 8px 26px rgba(63,224,200,.20);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding:0;
  min-height:100%;
  background:
    radial-gradient(760px 460px at 12% -6%,rgba(108,75,246,.18),transparent 62%),
    radial-gradient(680px 420px at 92% 4%,rgba(63,224,200,.13),transparent 64%),
    var(--bg-void);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--aurora);outline-offset:2px;border-radius:6px;}

body .container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:768px){ body .container{padding-left:32px;padding-right:32px;} }
@media (min-width:1280px){ body .container{padding-left:40px;padding-right:40px;} }

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  background:transparent;
  transition:background .28s var(--ease),border-color .28s var(--ease),backdrop-filter .28s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(6,9,23,.72);
  backdrop-filter:blur(12px) saturate(130%);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:74px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:34px;height:34px;
  color:var(--aurora);
  flex:0 0 auto;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text b{
  font-size:16px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--text);
  white-space:nowrap;
}
.logo-text span{
  font-size:11.5px;
  color:var(--muted);
  letter-spacing:.02em;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  border-radius:8px;
  font-size:14.5px;
  color:var(--text-2);
  transition:color .2s var(--ease),background .2s var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;bottom:6px;
  width:0;height:2px;
  border-radius:2px;
  background:var(--aurora);
  transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:16px;}
.nav-link.is-active{
  color:var(--text);
  background:rgba(108,75,246,.12);
  padding-left:14px;padding-right:14px;
}
.nav-link.is-active::after{width:16px;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),filter .2s var(--ease);
  position:relative;
  overflow:hidden;
}
.btn-primary{
  background:var(--grad);
  color:#fff;
  box-shadow:var(--shadow-glow);
}
.btn-primary::after{
  content:"";
  position:absolute;
  top:0;left:-120%;
  width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);
  transform:skewX(-18deg);
  transition:left .16s linear;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(108,75,246,.55),0 16px 40px rgba(108,75,246,.36);}
.btn-primary:hover::after{left:130%;}
.btn-primary:active{transform:translateY(0);filter:brightness(.94);}
.btn-ghost{
  background:var(--glass);
  border:1px solid rgba(255,255,255,.18);
  color:var(--text);
  backdrop-filter:blur(14px) saturate(120%);
}
.btn-ghost:hover{border-color:rgba(63,224,200,.4);box-shadow:var(--shadow-aurora);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-text{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:44px;
  color:var(--aurora);
  font-size:14.5px;
  font-weight:600;
}
.btn-text .arrow{transition:transform .2s var(--ease);}
.btn-text:hover .arrow{transform:translateX(4px);}
.nav-cta{min-height:42px;padding:0 20px;font-size:14.5px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.14);
  background:var(--glass);
  color:var(--text);
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:currentColor;
  border-radius:2px;
  position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-mask{
  display:none;
  position:fixed;inset:0;
  background:rgba(4,7,20,.66);
  z-index:89;
  opacity:0;
  transition:opacity .26s var(--ease);
}
.nav-mask.is-open{opacity:1;}
@media (max-width:1023px){
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;
    top:0;right:0;
    height:100%;
    width:82vw;
    max-width:360px;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:84px 20px 96px;
    background:rgba(8,12,32,.98);
    backdrop-filter:blur(14px) saturate(120%);
    border-left:1px solid var(--line-strong);
    transform:translateX(102%);
    transition:transform .26s var(--ease);
    z-index:90;
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0);}
  .nav-link{
    min-height:52px;
    padding:0 14px;
    font-size:16px;
  }
  .nav-link::after{display:none;}
  .nav-link.is-active{background:rgba(108,75,246,.16);}
  .nav-links .nav-cta{
    margin-top:14px;
    width:100%;
    min-height:48px;
    font-size:15.5px;
  }
}

/* ---------- Article header ---------- */
.article-hero{
  position:relative;
  padding:118px 0 40px;
  background-image:
    linear-gradient(180deg,rgba(6,9,23,.72),rgba(6,9,23,.92)),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover,cover;
  background-position:center,center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.article-hero::after{
  content:"";
  position:absolute;
  left:-10%;right:auto;
  top:64px;
  width:120%;
  height:1px;
  background:linear-gradient(90deg,rgba(63,224,200,0),rgba(63,224,200,.5),rgba(63,224,200,0));
  pointer-events:none;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:14px;
}
.breadcrumb a{color:var(--muted);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--aurora);}
.breadcrumb .sep{opacity:.6;}
.breadcrumb .current{color:var(--text);max-width:46vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  font-weight:500;
  color:var(--aurora);
  border:1px solid rgba(63,224,200,.28);
  background:rgba(63,224,200,.10);
  border-radius:var(--r-badge);
  padding:5px 12px;
  margin-bottom:16px;
}
.article-title{
  font-size:clamp(28px,4.4vw,46px);
  line-height:1.28;
  font-weight:700;
  letter-spacing:0;
  margin:0 0 18px;
  max-width:900px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  font-size:13.5px;
  color:var(--muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--muted);display:inline-block;}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  border-radius:var(--r-badge);
  border:1px solid rgba(108,75,246,.45);
  background:rgba(108,75,246,.12);
  color:var(--nebula-light);
  font-size:12.5px;
  font-weight:500;
  padding:4px 10px;
}
.badge-aurora{
  border-color:rgba(63,224,200,.35);
  background:rgba(63,224,200,.12);
  color:var(--aurora);
}
.hero-figure{
  margin-top:34px;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line-strong);
  background:var(--panel-2);
  aspect-ratio:16/9;
  max-height:420px;
}
.hero-figure img{
  width:100%;height:100%;
  object-fit:cover;
  object-position:center 42%;
}

/* ---------- Layout ---------- */
.article-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
  padding:56px 0 0;
}
@media (min-width:1024px){
  .article-layout{
    grid-template-columns:240px minmax(0,1fr);
    gap:56px;
    padding:72px 0 0;
  }
}
.side-box{
  position:sticky;
  top:104px;
  border:1px solid var(--line-strong);
  border-radius:var(--r-card);
  background:linear-gradient(180deg,#121838,#0C1130);
  padding:20px 18px;
}
.side-box h3{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  padding-bottom:12px;
  margin-bottom:12px;
  border-bottom:1px solid var(--line);
}
.side-list li + li{margin-top:2px;}
.side-list a{
  display:flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 10px;
  border-radius:10px;
  font-size:14px;
  color:var(--text-2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.side-list a::before{
  content:"";
  width:8px;height:2px;
  border-radius:2px;
  background:var(--aurora);
  opacity:.7;
  flex:0 0 auto;
}
.side-list a:hover{color:var(--text);background:rgba(108,75,246,.14);}
.side-tip{
  margin-top:16px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--muted);
  border-top:1px solid var(--line);
  padding-top:14px;
}

/* ---------- Article body ---------- */
.article-shell{
  border:1px solid var(--line-strong);
  border-radius:var(--r-wrap);
  background:linear-gradient(180deg,rgba(18,24,56,.86),rgba(12,17,48,.94));
  padding:28px 22px 34px;
  box-shadow:var(--shadow-md);
}
@media (min-width:768px){
  .article-shell{padding:40px 44px 48px;}
}
.article-content{
  max-width:760px;
  font-size:17px;
  line-height:1.9;
  color:var(--text-2);
}
.article-content > * + *{margin-top:1.5em;}
.article-content p{color:var(--text-2);}
.article-content strong{color:var(--text);font-weight:600;}
.article-content h2{
  position:relative;
  font-size:clamp(20px,2.4vw,26px);
  line-height:1.45;
  font-weight:600;
  color:var(--text);
  padding-left:16px;
  margin:40px 0 16px;
}
.article-content h2::before{
  content:"";
  position:absolute;
  left:0;top:.2em;bottom:.2em;
  width:4px;
  border-radius:4px;
  background:var(--grad);
}
.article-content h3{
  font-size:clamp(17px,1.8vw,20px);
  line-height:1.5;
  font-weight:600;
  color:var(--text);
  margin:32px 0 12px;
}
.article-content ul,
.article-content ol{margin:1.5em 0;}
.article-content li{
  position:relative;
  padding-left:22px;
  margin-bottom:10px;
  color:var(--text-2);
}
.article-content ul > li::before{
  content:"";
  position:absolute;
  left:0;top:.85em;
  width:10px;height:2px;
  border-radius:2px;
  background:var(--aurora);
}
.article-content ol{counter-reset:item;}
.article-content ol > li::before{
  counter-increment:item;
  content:counter(item);
  position:absolute;
  left:0;top:.15em;
  width:18px;height:18px;
  display:flex;align-items:center;justify-content:center;
  font-size:11.5px;
  font-weight:600;
  color:var(--aurora);
  border:1px solid rgba(63,224,200,.4);
  border-radius:6px;
  line-height:1;
}
.article-content blockquote{
  margin:1.6em 0;
  padding:20px;
  border-left:3px solid var(--aurora);
  border-radius:0 var(--r-btn) var(--r-btn) 0;
  background:rgba(255,255,255,.045);
  backdrop-filter:blur(14px) saturate(120%);
  color:var(--text-2);
  font-size:16px;
}
.article-content img{
  border-radius:12px;
  margin:1.6em auto;
  border:1px solid var(--line-strong);
  background:var(--panel-2);
}
.article-content figure{margin:1.6em 0;}
.article-content figcaption{
  font-size:13px;
  color:var(--muted);
  text-align:center;
  margin-top:10px;
}
.article-content table{
  width:100%;
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  border:1px solid var(--line-strong);
  border-radius:var(--r-btn);
  background:rgba(255,255,255,.035);
  font-size:15px;
}
.article-content th,
.article-content td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
  white-space:nowrap;
}
.article-content th{
  color:var(--text);
  font-weight:600;
  background:rgba(108,75,246,.14);
}
.article-content code{
  font-family:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:14px;
  padding:2px 6px;
  border-radius:6px;
  background:rgba(255,255,255,.07);
  border:1px solid var(--line-strong);
  color:var(--aurora);
}
.article-content pre{
  padding:18px;
  border-radius:var(--r-btn);
  border:1px solid var(--line-strong);
  background:rgba(6,9,23,.72);
  overflow-x:auto;
}
.article-content a{color:var(--aurora);}
.article-content a:hover{text-decoration:underline;text-underline-offset:3px;}
.article-content hr{
  border:none;
  border-top:1px solid var(--line);
  margin:2.2em 0;
}

.empty-state{
  max-width:760px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
  text-align:center;
  padding:56px 24px;
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
}
.empty-state .mark{
  width:52px;height:52px;
  border-radius:14px;
  border:1px solid rgba(63,224,200,.35);
  background:rgba(63,224,200,.09);
  display:flex;align-items:center;justify-content:center;
  color:var(--aurora);
}
.empty-state p{font-size:15px;color:var(--text-2);}

/* ---------- Tags / pager / related ---------- */
.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  max-width:760px;
  margin-top:40px;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.tag{
  display:inline-flex;
  align-items:center;
  min-height:34px;
  padding:0 14px;
  border-radius:var(--r-badge);
  border:1px solid var(--line-strong);
  background:var(--glass);
  backdrop-filter:blur(10px);
  font-size:12.5px;
  color:var(--text-2);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.tag:hover{border-color:rgba(63,224,200,.4);color:var(--text);}

.pager{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
  margin-top:36px;
}
@media (min-width:768px){
  .pager{grid-template-columns:1fr 1fr;}
}
.pager-card{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 20px;
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.pager-card:hover{
  transform:translateY(-3px);
  border-color:rgba(108,75,246,.5);
  box-shadow:var(--shadow-md);
}
.pager-card .kicker{font-size:12.5px;color:var(--muted);}
.pager-card .title{font-size:15.5px;font-weight:600;color:var(--text);}

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:26px;
}
.section-head h2{
  font-size:clamp(20px,2.6vw,28px);
  font-weight:600;
  line-height:1.4;
  color:var(--text);
}
.section-head .sub{
  font-size:14px;
  color:var(--muted);
  margin-top:6px;
}
.related-section{padding-top:64px;}
.card-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:768px){ .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));} }
@media (min-width:1024px){ .card-grid{grid-template-columns:repeat(3,minmax(0,1fr));} }
.info-card{
  display:flex;
  flex-direction:column;
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:linear-gradient(180deg,#121838,#0C1130);
  overflow:hidden;
  height:100%;
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.info-card:hover{
  transform:translateY(-3px);
  border-color:rgba(108,75,246,.5);
  box-shadow:var(--shadow-md);
}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--panel-2);
  border-bottom:1px solid var(--line);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.info-card:hover .card-media img{transform:scale(1.03);}
.card-media .float-badge{
  position:absolute;
  top:12px;left:12px;
  border-radius:var(--r-badge);
  padding:4px 10px;
  font-size:12px;
  color:var(--text);
  background:rgba(6,9,23,.62);
  border:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(10px);
}
.card-body{
  padding:18px 20px 20px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
}
.card-body h3{
  font-size:17px;
  line-height:1.5;
  font-weight:600;
  color:var(--text);
}
.card-body p{
  font-size:14px;
  line-height:1.75;
  color:var(--text-2);
}
.card-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:8px;
  font-size:12.5px;
  color:var(--muted);
}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;
  margin:72px 0 0;
  padding:40px 26px;
  border-radius:var(--r-wrap);
  border:1px solid rgba(108,75,246,.42);
  background:
    radial-gradient(520px 260px at 88% 0%,rgba(63,224,200,.14),transparent 60%),
    linear-gradient(180deg,rgba(18,24,56,.96),rgba(10,15,38,.96));
  overflow:hidden;
  text-align:center;
}
.cta-panel::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.16;
  pointer-events:none;
}
.cta-panel h2{
  position:relative;
  font-size:clamp(22px,3vw,30px);
  font-weight:600;
  color:var(--text);
  margin-bottom:12px;
}
.cta-panel p{
  position:relative;
  max-width:620px;
  margin:0 auto 24px;
  font-size:15px;
  color:var(--text-2);
}
.cta-actions{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px;
}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:88px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,15,38,.7),rgba(6,9,23,.98));
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
}
.footer-brand p{
  margin-top:14px;
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
  max-width:320px;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  margin-bottom:14px;
}
.footer-col li + li{margin-top:2px;}
.footer-col a{
  display:inline-flex;
  align-items:center;
  min-height:38px;
  font-size:14px;
  color:var(--text-2);
  transition:color .2s var(--ease);
}
.footer-col a:hover{
  color:var(--aurora);
  text-decoration:underline;
  text-underline-offset:3px;
}
.footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  justify-content:space-between;
  font-size:13px;
  color:var(--muted);
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--aurora);}

.section-gap{margin-top:88px;}
@media (max-width:767px){
  .article-hero{padding-top:104px;}
  .article-title{font-size:clamp(24px,7vw,32px);}
  .breadcrumb .current{max-width:60vw;}
  .section-gap{margin-top:56px;}
  .related-section{padding-top:48px;}
  .cta-panel{margin-top:56px;padding:32px 20px;}
  .site-footer{margin-top:64px;padding-top:44px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .info-card:hover,.pager-card:hover,.btn:hover{transform:none;}
}

/* roulang page: category1 */
:root{
  --bg-void:#060917;
  --bg-deep:#0A0F26;
  --panel:#111735;
  --panel-2:#0C1130;
  --nebula:#6C4BF6;
  --nebula-dark:#5A3AD9;
  --nebula-light:#9C86FF;
  --aurora:#3FE0C8;
  --stardust:#F2C879;
  --text:#E9EDFF;
  --text-2:#A6AECF;
  --muted:#6D769B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.12);
  --glass:rgba(255,255,255,.045);
  --grad:linear-gradient(135deg,#6C4BF6 0%,#4A7BF0 52%,#3FE0C8 100%);
  --r-card:16px;
  --r-btn:12px;
  --r-badge:8px;
  --r-wrap:24px;
  --sh-sm:0 2px 8px rgba(0,0,0,.35);
  --sh-md:0 12px 32px rgba(4,8,28,.55);
  --sh-glow:0 0 0 1px rgba(108,75,246,.45), 0 10px 34px rgba(108,75,246,.28);
  --sh-aurora:0 0 0 1px rgba(63,224,200,.35), 0 8px 26px rgba(63,224,200,.20);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:72px;
}

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

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--text);
  background-color:var(--bg-void);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(620px 440px at 10% 6%, rgba(108,75,246,.17), transparent 70%),
    radial-gradient(560px 400px at 90% 24%, rgba(63,224,200,.10), transparent 72%),
    linear-gradient(180deg,#060917 0%,#080D20 48%,#060917 100%);
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.34;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px, transparent 1px);
  background-size:130px 130px;
  animation:starDrift 32s linear infinite;
}

@keyframes starDrift{
  0%{background-position:0 0}
  100%{background-position:130px 260px}
}

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

a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--aurora)}

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

h1,h2,h3,h4,p,ul,ol,figure{margin:0}

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

:focus-visible{outline:2px solid var(--aurora);outline-offset:2px;border-radius:6px}

::selection{background:rgba(108,75,246,.45);color:#fff}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}

/* ---------- 通用标题 ---------- */
.sec-title{
  margin:0 0 12px;
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.35;
  font-weight:600;
  letter-spacing:.01em;
}
.sec-desc{
  color:var(--text-2);
  font-size:15px;
  line-height:1.8;
  max-width:760px;
}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:32px;
}

section{position:relative}

.section-pad{padding-top:88px;padding-bottom:88px}
.section-pad-sm{padding-top:56px;padding-bottom:56px}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:80;
  height:var(--header-h);
  display:flex;
  align-items:center;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .28s var(--ease),border-color .28s var(--ease),backdrop-filter .28s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,9,23,.78);
  backdrop-filter:blur(12px) saturate(130%);
  -webkit-backdrop-filter:blur(12px) saturate(130%);
  border-bottom-color:var(--line);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
}

.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  color:var(--text);
}
.logo:hover{color:var(--text)}
.logo-mark{
  width:34px;
  height:34px;
  flex:0 0 34px;
  color:var(--nebula-light);
  filter:drop-shadow(0 0 10px rgba(108,75,246,.45));
}
.logo-text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}
.logo-text b{
  font-size:16px;
  font-weight:700;
  letter-spacing:.02em;
}
.logo-text span{
  font-size:11px;
  color:var(--muted);
  letter-spacing:.04em;
}

.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
}

.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:44px;
  padding:0 12px;
  border-radius:8px;
  font-size:14.5px;
  color:var(--text-2);
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:6px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--aurora);
  transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:16px}
.nav-link.is-active{
  color:var(--text);
  background:rgba(108,75,246,.12);
  padding:0 16px;
}
.nav-link.is-active::after{width:16px}

.nav-cta{
  margin-left:10px;
  height:44px;
  padding:0 22px;
  font-size:14.5px;
}

.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:10px;
  border:1px solid var(--line-strong);
  align-items:center;
  justify-content:center;
  color:var(--text);
  background:var(--glass);
  transition:border-color .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(63,224,200,.45)}

.nav-mask{
  display:none;
  position:fixed;
  inset:0;
  z-index:88;
  background:rgba(4,6,18,.68);
  backdrop-filter:blur(2px);
  opacity:0;
  pointer-events:none;
  transition:opacity .26s var(--ease);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),filter .16s var(--ease);
}

.btn-primary{
  position:relative;
  overflow:hidden;
  color:#fff;
  background-image:var(--grad);
  box-shadow:var(--sh-glow);
}
.btn-primary::before{
  content:"";
  position:absolute;
  top:0;
  left:-120%;
  width:60%;
  height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent);
  transition:left .16s ease-out;
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(108,75,246,.55),0 16px 42px rgba(108,75,246,.38);
}
.btn-primary:hover::before{left:130%}
.btn-primary:active{transform:translateY(0);filter:brightness(.94)}

.btn-ghost{
  color:var(--text);
  background:var(--glass);
  border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.btn-ghost:hover{
  color:var(--text);
  border-color:rgba(63,224,200,.42);
  box-shadow:0 0 0 1px rgba(63,224,200,.18),0 8px 24px rgba(63,224,200,.14);
  transform:translateY(-2px);
}

.btn-text{
  display:inline-flex;
  align-items:center;
  gap:6px;
  min-height:44px;
  color:var(--aurora);
  font-size:14.5px;
  font-weight:500;
}
.btn-text .arrow{transition:transform .2s var(--ease)}
.btn-text:hover{color:var(--aurora)}
.btn-text:hover .arrow{transform:translateX(4px)}

.btn[disabled],.btn.is-disabled{opacity:.42;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 10px;
  border-radius:var(--r-badge);
  border:1px solid rgba(108,75,246,.34);
  background:rgba(108,75,246,.12);
  color:var(--nebula-light);
  font-size:12px;
  font-weight:500;
  letter-spacing:.03em;
}
.badge-aurora{
  border-color:rgba(63,224,200,.34);
  background:rgba(63,224,200,.12);
  color:var(--aurora);
}
.badge-stardust{
  border-color:rgba(242,200,121,.36);
  background:rgba(242,200,121,.12);
  color:var(--stardust);
}
.badge-muted{
  border-color:var(--line-strong);
  background:rgba(255,255,255,.04);
  color:var(--text-2);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:14px;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--aurora)}
.breadcrumb .sep{color:rgba(255,255,255,.22)}
.breadcrumb .current{color:var(--text)}

/* ---------- 分类横幅 ---------- */
.page-banner{
  position:relative;
  padding:calc(var(--header-h) + 62px) 0 52px;
  min-height:300px;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  background-image:
    linear-gradient(180deg,rgba(6,9,23,.74) 0%,rgba(6,9,23,.9) 62%,rgba(6,9,23,1) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center 30%;
  border-bottom:1px solid var(--line);
}
.page-banner::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(63,224,200,.55),transparent);
}
.page-banner h1{
  font-size:clamp(28px,3.4vw,46px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:.01em;
  margin-bottom:14px;
}
.page-banner .banner-note{
  max-width:660px;
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.85;
}
.banner-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:20px;
}

/* ---------- 快讯条 ---------- */
.notice-bar{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
  margin-top:-30px;
  position:relative;
  z-index:5;
  padding:16px 20px;
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.045);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh-md);
}
.notice-bar .notice-label{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12.5px;
  font-weight:500;
  color:var(--stardust);
  letter-spacing:.04em;
  white-space:nowrap;
}
.notice-bar p{
  flex:1 1 320px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
}

/* ---------- 正文段落 ---------- */
.article-body{
  max-width:820px;
}
.article-body p{
  color:var(--text-2);
  font-size:16.5px;
  line-height:1.9;
  margin-bottom:20px;
}
.article-body p strong{color:var(--text);font-weight:600}
.article-body .lead{
  color:var(--text);
  font-size:17px;
}

/* ---------- 左图右文列表 ---------- */
.row-list{
  display:flex;
  flex-direction:column;
  border-top:1px solid var(--line);
}
.row-item{
  display:grid;
  grid-template-columns:40% 1fr;
  gap:28px;
  align-items:center;
  padding:26px 20px;
  border-bottom:1px solid var(--line);
  border-radius:var(--r-card);
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.row-item:nth-child(odd){background:rgba(255,255,255,.022)}
.row-item:hover{
  background:rgba(255,255,255,.05);
  border-color:rgba(108,75,246,.32);
  transform:translateY(-3px);
}
.row-thumb{
  position:relative;
  aspect-ratio:16/9;
  border-radius:12px;
  overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(180deg,#121838,#0C1130);
}
.row-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.row-item:hover .row-thumb img{transform:scale(1.03)}
.row-thumb::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,9,23,.06),rgba(6,9,23,.52));
}
.row-body h3{
  font-size:clamp(18px,2vw,21px);
  line-height:1.5;
  font-weight:600;
  margin-bottom:10px;
}
.row-body p{
  color:var(--text-2);
  font-size:15px;
  line-height:1.85;
  margin-bottom:14px;
}
.row-meta{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--muted);
}

/* ---------- 要点 / 场景卡 ---------- */
.grid-asym{
  display:grid;
  grid-template-columns:5fr 4fr 3fr;
  gap:20px;
}
.plain-card{
  padding:24px;
  border-radius:var(--r-card);
  border:1px solid #1E2650;
  background:linear-gradient(180deg,#121838,#0C1130);
  box-shadow:var(--sh-sm);
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.plain-card:hover{
  border-color:rgba(108,75,246,.34);
  transform:translateY(-3px);
  box-shadow:var(--sh-md);
}
.plain-card h3{
  font-size:19px;
  line-height:1.5;
  font-weight:600;
  margin-bottom:10px;
}
.plain-card p{
  color:var(--text-2);
  font-size:14.5px;
  line-height:1.85;
}
.card-index{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:32px;
  height:32px;
  border-radius:9px;
  margin-bottom:16px;
  font-size:13px;
  font-weight:600;
  color:var(--aurora);
  border:1px solid rgba(63,224,200,.32);
  background:rgba(63,224,200,.1);
}

.check-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.check-list li{
  position:relative;
  padding-left:20px;
  color:var(--text-2);
  font-size:14.5px;
  line-height:1.85;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:12px;
  width:10px;
  height:2px;
  border-radius:2px;
  background:var(--aurora);
}

/* ---------- 步骤 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin-top:36px;
}
.step{
  position:relative;
  padding:24px 20px;
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.step:hover{border-color:rgba(63,224,200,.36);transform:translateY(-3px)}
.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:32px;
  height:32px;
  border-radius:50%;
  font-size:13px;
  font-weight:600;
  color:#fff;
  background-image:var(--grad);
  margin-bottom:14px;
}
.step h3{font-size:17px;font-weight:600;margin-bottom:8px}
.step p{color:var(--text-2);font-size:14px;line-height:1.8}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;margin-top:32px}
.faq-item{
  border-radius:var(--r-card);
  border:1px solid #1E2650;
  background:linear-gradient(180deg,#121838,#0C1130);
  overflow:hidden;
  transition:border-color .22s var(--ease);
}
.faq-item:hover{border-color:rgba(108,75,246,.3)}
.faq-item.is-open{border-color:rgba(108,75,246,.42)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:64px;
  padding:16px 22px;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  color:var(--text);
  line-height:1.6;
}
.faq-icon{
  position:relative;
  flex:0 0 24px;
  width:24px;
  height:24px;
  border-radius:7px;
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.04);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  width:11px;
  height:2px;
  border-radius:2px;
  background:var(--aurora);
  transform:translate(-50%,-50%);
  transition:transform .26s var(--ease);
}
.faq-icon::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(0deg)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .26s var(--ease);
}
.faq-a-inner{
  padding:0 22px 20px;
  border-top:1px solid var(--line);
  padding-top:16px;
}
.faq-a-inner p{
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.85;
}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-wrap);
  padding:52px 40px;
  text-align:center;
  border:1px solid rgba(108,75,246,.42);
  background:
    radial-gradient(520px 300px at 18% 12%, rgba(108,75,246,.22), transparent 72%),
    radial-gradient(420px 260px at 84% 88%, rgba(63,224,200,.14), transparent 74%),
    linear-gradient(180deg,#121838,#0A0F26);
  box-shadow:var(--sh-md);
}
.cta-panel::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.3;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px, transparent 1px);
  background-size:96px 96px;
}
.cta-panel > *{position:relative;z-index:1}
.cta-panel h2{
  font-size:clamp(23px,2.5vw,32px);
  font-weight:600;
  line-height:1.35;
  margin-bottom:12px;
}
.cta-panel p{
  color:var(--text-2);
  font-size:15.5px;
  max-width:640px;
  margin:0 auto 26px;
}
.cta-actions{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,15,38,.55),rgba(6,9,23,1));
  padding-top:64px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:44px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{
  color:var(--muted);
  font-size:14px;
  line-height:1.85;
  max-width:300px;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  letter-spacing:.04em;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{
  display:inline-block;
  min-height:24px;
  color:var(--text-2);
  font-size:14px;
  line-height:1.7;
  text-decoration:underline;
  text-decoration-color:transparent;
  text-underline-offset:3px;
  transition:color .2s var(--ease),text-decoration-color .2s var(--ease);
}
.footer-col a:hover{
  color:var(--aurora);
  text-decoration-color:var(--aurora);
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--aurora)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-links{
    position:fixed;
    top:0;
    right:0;
    z-index:90;
    width:82vw;
    max-width:360px;
    height:100vh;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:88px 20px 24px;
    background:rgba(8,11,28,.96);
    backdrop-filter:blur(18px) saturate(130%);
    -webkit-backdrop-filter:blur(18px) saturate(130%);
    border-left:1px solid var(--line);
    box-shadow:-24px 0 60px rgba(2,4,16,.7);
    transform:translateX(100%);
    transition:transform .26s var(--ease);
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-link{
    height:52px;
    padding:0 14px;
    font-size:15.5px;
    border-radius:8px;
  }
  .nav-link::after{display:none}
  .nav-link.is-active{background:rgba(108,75,246,.14);padding:0 14px}
  .nav-cta{
    margin:16px 0 0;
    width:100%;
    height:52px;
  }
  .nav-toggle{display:inline-flex}
  .nav-mask{display:block}

  .grid-asym{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}

@media (max-width:768px){
  .container{padding-left:24px;padding-right:24px}
  .section-pad{padding-top:64px;padding-bottom:64px}
  .section-pad-sm{padding-top:44px;padding-bottom:44px}
  .page-banner{
    padding:calc(var(--header-h) + 44px) 0 40px;
    min-height:260px;
  }
  .row-item{
    grid-template-columns:1fr;
    gap:16px;
    padding:22px 16px;
  }
  .grid-asym{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:14px}
  .cta-panel{padding:38px 22px}
  .site-footer{margin-top:72px;padding-top:48px}
}

@media (max-width:520px){
  .container{padding-left:18px;padding-right:18px}
  body{font-size:16px}
  .logo-text b{font-size:15px}
  .logo-text span{display:none}
  .logo-mark{width:30px;height:30px;flex-basis:30px}
  .article-body p{font-size:16px}
  .faq-q{font-size:15.5px;padding:14px 16px}
  .faq-a-inner{padding:14px 16px 18px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .btn-text{width:auto}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category2 */
:root{
    --bg-void:#060917;
    --bg-deep:#0A0F26;
    --panel:#111735;
    --panel-2:#0C1130;
    --nebula:#6C4BF6;
    --nebula-deep:#5A3AD9;
    --nebula-light:#9C86FF;
    --aurora:#3FE0C8;
    --stardust:#F2C879;
    --text:#E9EDFF;
    --text-sec:#A6AECF;
    --text-muted:#7C86AC;
    --line:rgba(255,255,255,.08);
    --line-strong:#1E2650;
    --glass:rgba(255,255,255,.045);
    --r-card:16px;
    --r-btn:12px;
    --r-badge:8px;
    --r-wrap:24px;
    --shadow-sm:0 2px 8px rgba(0,0,0,.35);
    --shadow-md:0 12px 32px rgba(4,8,28,.55);
    --shadow-glow:0 0 0 1px rgba(108,75,246,.45),0 10px 34px rgba(108,75,246,.28);
    --shadow-aurora:0 0 0 1px rgba(63,224,200,.35),0 8px 26px rgba(63,224,200,.20);
    --grad-main:linear-gradient(135deg,#6C4BF6 0%,#4A7BF0 48%,#3FE0C8 100%);
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg-void);
    color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    background:
      radial-gradient(760px 520px at 12% 6%,rgba(108,75,246,.16),transparent 70%),
      radial-gradient(680px 480px at 88% 22%,rgba(63,224,200,.10),transparent 72%);
  }
  body::after{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    opacity:.30;
    background-image:radial-gradient(rgba(255,255,255,.30) 1px,transparent 1px);
    background-size:118px 118px;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  h1,h2,h3,h4,p,ul,ol{margin:0}
  ul,ol{padding:0;list-style:none}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
    position:relative;
    z-index:1;
  }
  @media (min-width:768px){.container{padding:0 32px}}
  @media (min-width:1280px){.container{padding:0 40px}}

  :focus-visible{outline:2px solid var(--aurora);outline-offset:2px;border-radius:6px}

  /* ---------- Header ---------- */
  .site-header{
    position:fixed;
    top:0;left:0;right:0;
    z-index:60;
    border-bottom:1px solid transparent;
    transition:background .3s var(--ease),border-color .3s var(--ease),backdrop-filter .3s var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(6,9,23,.78);
    backdrop-filter:blur(12px) saturate(120%);
    -webkit-backdrop-filter:blur(12px) saturate(120%);
    border-bottom-color:var(--line);
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    min-height:72px;
  }
  .logo{
    display:inline-flex;
    align-items:center;
    gap:10px;
    min-height:44px;
    color:var(--text);
  }
  .logo-mark{
    width:34px;height:34px;
    color:var(--aurora);
    flex:none;
    transition:color .22s var(--ease);
  }
  .logo:hover .logo-mark{color:var(--nebula-light)}
  .logo-text{display:flex;flex-direction:column;line-height:1.2}
  .logo-text b{font-size:16px;font-weight:700;letter-spacing:.01em}
  .logo-text span{font-size:11.5px;color:var(--text-muted);letter-spacing:.04em}

  .nav-links{display:none;align-items:center;gap:4px}
  .nav-link{
    position:relative;
    display:inline-flex;
    align-items:center;
    min-height:44px;
    padding:0 14px;
    border-radius:var(--r-badge);
    font-size:14.5px;
    color:var(--text-sec);
    transition:color .2s var(--ease),background .2s var(--ease);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:50%;
    bottom:6px;
    width:0;
    height:2px;
    border-radius:2px;
    background:var(--aurora);
    transform:translateX(-50%);
    transition:width .2s var(--ease);
  }
  .nav-link:hover{color:var(--text)}
  .nav-link:hover::after{width:16px}
  .nav-link.is-active{
    color:var(--text);
    background:rgba(108,75,246,.12);
    padding:0 16px;
  }
  .nav-link.is-active::after{width:16px}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:48px;
    padding:0 28px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    letter-spacing:.01em;
    cursor:pointer;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),filter .2s var(--ease);
  }
  .btn-primary{
    position:relative;
    overflow:hidden;
    background:var(--grad-main);
    color:#fff;
    box-shadow:var(--shadow-glow);
  }
  .btn-primary::before{
    content:"";
    position:absolute;
    top:0;left:-60%;
    width:45%;height:100%;
    background:linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent);
    transform:skewX(-18deg);
    transition:left .6s var(--ease);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(108,75,246,.55),0 16px 40px rgba(108,75,246,.36)}
  .btn-primary:hover::before{left:120%}
  .btn-primary:active{transform:translateY(0);filter:brightness(.94)}
  .btn-ghost{
    background:rgba(255,255,255,.04);
    border:1px solid rgba(255,255,255,.18);
    color:var(--text);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
  }
  .btn-ghost:hover{border-color:rgba(63,224,200,.45);box-shadow:0 0 0 1px rgba(63,224,200,.25),0 8px 26px rgba(63,224,200,.16);transform:translateY(-2px)}
  .btn-text{
    display:inline-flex;
    align-items:center;
    gap:6px;
    color:var(--aurora);
    font-size:14.5px;
    font-weight:600;
    min-height:44px;
  }
  .btn-text .arrow{transition:transform .2s var(--ease)}
  .btn-text:hover .arrow{transform:translateX(4px)}
  .nav-cta{min-height:44px;padding:0 22px;font-size:14.5px}

  .nav-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:46px;height:46px;
    border-radius:var(--r-btn);
    border:1px solid rgba(255,255,255,.16);
    background:rgba(255,255,255,.04);
    color:var(--text);
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
  }
  .nav-toggle span::before{top:-6px}
  .nav-toggle span::after{top:6px}

  .drawer-mask{
    position:fixed;inset:0;z-index:70;
    background:rgba(3,5,15,.62);
    opacity:0;visibility:hidden;
    transition:opacity .26s var(--ease),visibility .26s var(--ease);
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;z-index:80;
    width:82vw;max-width:360px;
    display:flex;flex-direction:column;
    padding:22px 20px 26px;
    background:linear-gradient(180deg,#0D1231,#070A1C);
    border-left:1px solid var(--line-strong);
    transform:translateX(100%);
    transition:transform .26s var(--ease);
    overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
  .drawer-title{font-size:14px;color:var(--text-muted);letter-spacing:.06em}
  .drawer-close{
    width:44px;height:44px;border-radius:var(--r-btn);
    border:1px solid rgba(255,255,255,.16);
    display:inline-flex;align-items:center;justify-content:center;
    font-size:18px;color:var(--text-sec);
  }
  .drawer-close:hover{color:var(--text);border-color:rgba(63,224,200,.4)}
  .drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:auto}
  .drawer-nav a{
    display:flex;align-items:center;
    min-height:52px;
    padding:0 14px;
    border-radius:var(--r-badge);
    color:var(--text-sec);
    font-size:15px;
    border:1px solid transparent;
  }
  .drawer-nav a:hover{color:var(--text);background:rgba(255,255,255,.04)}
  .drawer-nav a.is-active{
    color:var(--text);
    background:rgba(108,75,246,.14);
    border-color:rgba(108,75,246,.35);
  }
  .drawer-foot{padding-top:18px;border-top:1px solid var(--line);margin-top:18px}

  @media (min-width:1024px){
    .nav-links{display:flex}
    .nav-toggle{display:none}
    .drawer,.drawer-mask{display:none}
  }

  /* ---------- Banner ---------- */
  .page-banner{
    position:relative;
    padding:132px 0 52px;
    overflow:hidden;
    background-image:url("/assets/images/backpic/back-2.png");
    background-size:cover;
    background-position:center;
  }
  .page-banner::before{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(6,9,23,.86) 0%,rgba(6,9,23,.72) 45%,rgba(6,9,23,.96) 100%);
  }
  .page-banner::after{
    content:"";
    position:absolute;inset:0;
    background:radial-gradient(680px 320px at 18% 24%,rgba(108,75,246,.22),transparent 70%);
  }
  .banner-inner{position:relative;z-index:1;max-width:800px}
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--text-muted);margin-bottom:14px;
  }
  .breadcrumb a{color:var(--text-muted);transition:color .2s var(--ease)}
  .breadcrumb a:hover{color:var(--aurora)}
  .breadcrumb .sep{opacity:.5}
  .breadcrumb .current{color:var(--text)}
  .banner-tag{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;margin-bottom:16px;
    border-radius:var(--r-badge);
    border:1px solid rgba(63,224,200,.35);
    background:rgba(63,224,200,.12);
    color:var(--aurora);
    font-size:12.5px;font-weight:500;
  }
  .page-banner h1{
    font-size:clamp(32px,5vw,50px);
    line-height:1.25;
    font-weight:700;
    letter-spacing:.01em;
    margin-bottom:16px;
  }
  .banner-sub{
    font-size:clamp(15px,1.5vw,17px);
    color:var(--text-sec);
    line-height:1.8;
    max-width:640px;
  }
  .banner-meta{
    display:flex;flex-wrap:wrap;gap:10px 18px;
    margin-top:24px;
    font-size:13px;color:var(--text-muted);
  }
  .banner-meta span{display:inline-flex;align-items:center;gap:6px}
  .dot{width:6px;height:6px;border-radius:50%;background:var(--aurora);box-shadow:0 0 8px rgba(63,224,200,.65)}

  /* ---------- Section base ---------- */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:88px 0}}
  .section-head{max-width:760px;margin-bottom:32px}
  .section-head h2{
    font-size:clamp(24px,3vw,34px);
    line-height:1.35;
    font-weight:600;
    margin-bottom:12px;
  }
  .section-head p{color:var(--text-sec);font-size:16px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;letter-spacing:.08em;
    color:var(--aurora);
    margin-bottom:12px;
  }
  .eyebrow::before{content:"";width:18px;height:1px;background:var(--aurora);opacity:.7}

  /* ---------- Overview ---------- */
  .overview-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:28px;
  }
  @media (min-width:1024px){
    .overview-grid{grid-template-columns:1.55fr 1fr;gap:44px;align-items:start}
  }
  .prose-block p{color:var(--text-sec);font-size:16.5px;line-height:1.9;margin-bottom:20px}
  .prose-block p:last-child{margin-bottom:0}
  .prose-block strong{color:var(--text);font-weight:600}

  .aside-card{
    border-radius:var(--r-card);
    border:1px solid var(--line-strong);
    background:linear-gradient(180deg,#121838,#0C1130);
    padding:24px;
    box-shadow:var(--shadow-sm);
  }
  .aside-card h3{font-size:17px;font-weight:600;margin-bottom:16px}
  .stat-row{
    display:flex;align-items:center;justify-content:space-between;
    padding:12px 0;
    border-bottom:1px solid var(--line);
    font-size:14px;
  }
  .stat-row:last-of-type{border-bottom:0}
  .stat-row .label{color:var(--text-sec)}
  .stat-row .value{color:var(--aurora);font-weight:600}
  .aside-note{
    margin-top:16px;padding-top:16px;border-top:1px solid var(--line);
    font-size:13px;color:var(--text-muted);line-height:1.75;
  }

  /* ---------- Masonry cards ---------- */
  .masonry{
    display:grid;
    grid-template-columns:1fr;
    gap:20px;
    align-items:start;
  }
  @media (min-width:720px){
    .masonry{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  }
  .m-card{
    border-radius:var(--r-card);
    border:1px solid var(--line-strong);
    background:linear-gradient(180deg,#121838,#0C1130);
    overflow:hidden;
    box-shadow:var(--shadow-sm);
    transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
  }
  .m-card:hover{
    transform:translateY(-3px);
    border-color:rgba(108,75,246,.5);
    box-shadow:var(--shadow-md);
  }
  .m-card-body{padding:22px}
  .m-card h3{font-size:18px;line-height:1.5;font-weight:600;margin-bottom:10px}
  .m-card p{color:var(--text-sec);font-size:15px;line-height:1.85}
  .m-card .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
  .badge{
    display:inline-flex;align-items:center;
    padding:4px 10px;
    border-radius:var(--r-badge);
    border:1px solid rgba(255,255,255,.12);
    background:rgba(255,255,255,.05);
    color:var(--text-sec);
    font-size:12px;font-weight:500;line-height:1.6;
  }
  .badge-nebula{border-color:rgba(108,75,246,.42);background:rgba(108,75,246,.14);color:#C8BBFF}
  .badge-aurora{border-color:rgba(63,224,200,.38);background:rgba(63,224,200,.12);color:#9BF2E4}
  .badge-stardust{border-color:rgba(242,200,121,.38);background:rgba(242,200,121,.12);color:#F6DCA6}
  .m-card figure{margin:0}
  .m-card figure img{
    width:100%;
    aspect-ratio:16/9;
    object-fit:cover;
    background:#0C1130;
  }
  .m-card--tall .m-card-body{padding:26px 24px 28px}
  .m-card--tall h3{font-size:20px}
  .m-card--wide{grid-column:1/-1}
  .m-card--wide .m-card-body{padding:26px 24px}

  .check-list{margin-top:16px;display:flex;flex-direction:column;gap:10px}
  .check-list li{
    position:relative;
    padding-left:20px;
    color:var(--text-sec);
    font-size:14.5px;
    line-height:1.8;
  }
  .check-list li::before{
    content:"";
    position:absolute;
    left:0;top:11px;
    width:10px;height:2px;
    border-radius:2px;
    background:var(--aurora);
  }

  /* ---------- Steps ---------- */
  .steps{
    display:grid;
    grid-template-columns:1fr;
    gap:0;
    position:relative;
  }
  .step{
    position:relative;
    padding:0 0 26px 30px;
    border-left:2px solid rgba(255,255,255,.08);
  }
  .step:last-child{border-left-color:transparent;padding-bottom:0}
  .step-num{
    position:absolute;
    left:-17px;top:0;
    width:32px;height:32px;
    border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    font-size:13px;font-weight:600;
    background:var(--grad-main);
    color:#fff;
    box-shadow:0 6px 18px rgba(108,75,246,.35);
  }
  .step h3{font-size:17px;font-weight:600;margin-bottom:6px;padding-top:4px}
  .step p{color:var(--text-sec);font-size:14.5px;line-height:1.85}
  @media (min-width:900px){
    .steps{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
    .step{
      padding:0;
      border-left:0;
      border-top:2px solid rgba(255,255,255,.08);
      padding-top:26px;
    }
    .step:last-child{border-top-color:rgba(255,255,255,.08)}
    .step-num{left:0;top:-17px}
    .step h3{padding-top:0}
  }

  /* ---------- Notes strip ---------- */
  .notes-panel{
    border-radius:var(--r-wrap);
    border:1px solid var(--line-strong);
    background:linear-gradient(180deg,#0F1533,#0A0E24);
    padding:28px 22px;
    position:relative;
    overflow:hidden;
  }
  .notes-panel::before{
    content:"";
    position:absolute;left:0;top:0;bottom:0;width:3px;
    background:linear-gradient(180deg,var(--aurora),rgba(63,224,200,0));
  }
  .notes-panel h2{font-size:clamp(22px,2.6vw,28px);font-weight:600;margin-bottom:10px}
  .notes-panel > p{color:var(--text-sec);font-size:15.5px;margin-bottom:20px}
  .notes-grid{display:grid;grid-template-columns:1fr;gap:14px}
  @media (min-width:768px){.notes-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 28px}}
  .note-item{
    display:flex;gap:12px;
    padding:14px 16px;
    border-radius:var(--r-badge);
    border:1px solid var(--line);
    background:rgba(255,255,255,.03);
  }
  .note-item .mark{
    flex:none;width:6px;height:6px;border-radius:50%;
    background:var(--stardust);
    margin-top:11px;
  }
  .note-item span{color:var(--text-sec);font-size:14.5px;line-height:1.8}

  /* ---------- FAQ ---------- */
  .faq-list{display:flex;flex-direction:column;gap:12px}
  .faq-item{
    border-radius:var(--r-card);
    border:1px solid var(--line-strong);
    background:linear-gradient(180deg,#121838,#0C1130);
    overflow:hidden;
  }
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;
    font-size:16.5px;font-weight:600;
    min-height:56px;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-icon{
    flex:none;position:relative;
    width:18px;height:18px;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:0;top:8px;
    width:18px;height:2px;border-radius:2px;
    background:var(--aurora);
    transition:transform .26s var(--ease);
  }
  .faq-icon::after{transform:rotate(90deg)}
  .faq-item[open] .faq-icon::after{transform:rotate(0)}
  .faq-item[open] summary{color:var(--text)}
  .faq-answer{
    padding:0 20px 18px;
    border-top:1px solid var(--line);
    margin-top:0;
    padding-top:16px;
    color:var(--text-sec);
    font-size:15.5px;
    line-height:1.9;
  }

  /* ---------- CTA ---------- */
  .cta-panel{
    position:relative;
    border-radius:var(--r-wrap);
    border:1px solid rgba(108,75,246,.42);
    background:linear-gradient(135deg,rgba(108,75,246,.16),rgba(10,15,38,.92) 55%,rgba(63,224,200,.12));
    padding:36px 22px;
    overflow:hidden;
    text-align:left;
  }
  .cta-panel::after{
    content:"";
    position:absolute;inset:0;
    pointer-events:none;
    opacity:.35;
    background-image:radial-gradient(rgba(255,255,255,.28) 1px,transparent 1px);
    background-size:96px 96px;
  }
  .cta-inner{position:relative;z-index:1;max-width:660px}
  .cta-panel h2{font-size:clamp(22px,3vw,30px);font-weight:600;margin-bottom:12px}
  .cta-panel p{color:var(--text-sec);font-size:16px;margin-bottom:24px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

  /* ---------- Footer ---------- */
  .site-footer{
    position:relative;
    z-index:1;
    margin-top:28px;
    border-top:1px solid var(--line);
    background:linear-gradient(180deg,rgba(10,15,38,.6),rgba(6,9,23,.98));
    padding:44px 0 24px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:30px;
    padding-bottom:30px;
    border-bottom:1px solid var(--line);
  }
  @media (min-width:768px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr;gap:28px}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.8fr 1fr 1fr 1fr}}
  .footer-brand .logo{margin-bottom:14px}
  .footer-brand p{color:var(--text-muted);font-size:13.5px;line-height:1.8;max-width:320px}
  .footer-col h4{
    font-size:13px;
    letter-spacing:.08em;
    color:var(--text);
    margin-bottom:14px;
    font-weight:600;
  }
  .footer-col ul{display:flex;flex-direction:column;gap:10px}
  .footer-col a{
    color:var(--text-sec);
    font-size:14px;
    transition:color .2s var(--ease);
  }
  .footer-col a:hover{color:var(--aurora);text-decoration:underline;text-underline-offset:3px}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:10px 20px;
    justify-content:space-between;
    align-items:center;
    padding-top:20px;
    color:var(--text-muted);
    font-size:13px;
  }
  .footer-bottom a{color:var(--text-muted)}
  .footer-bottom a:hover{color:var(--aurora);text-decoration:underline;text-underline-offset:3px}

  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{
      animation-duration:.001ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.001ms !important;
      scroll-behavior:auto !important;
    }
  }

/* roulang page: category3 */
:root{
  --bg-void:#060917;
  --bg-deep:#0A0F26;
  --panel:#111735;
  --panel-2:#0C1130;
  --nebula:#6C4BF6;
  --nebula-dark:#5A3AD9;
  --nebula-soft:#9C86FF;
  --aurora:#3FE0C8;
  --stardust:#F2C879;
  --text:#E9EDFF;
  --text-2:#A6AECF;
  --muted:#6D769B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --glass:rgba(255,255,255,.045);
  --grad:linear-gradient(135deg,#6C4BF6 0%,#4A7BF0 52%,#3FE0C8 100%);
  --r-card:16px;
  --r-btn:12px;
  --r-badge:8px;
  --r-wrap:24px;
  --r-img:12px;
  --sh-sm:0 2px 8px rgba(0,0,0,.35);
  --sh-md:0 12px 32px rgba(4,8,28,.55);
  --sh-glow:0 0 0 1px rgba(108,75,246,.45), 0 10px 34px rgba(108,75,246,.28);
  --sh-aurora:0 0 0 1px rgba(63,224,200,.35), 0 8px 26px rgba(63,224,200,.20);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sec-gap:56px;
}
@media (min-width:1024px){ :root{ --sec-gap:96px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  padding:0;
  background:var(--bg-void);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{ overflow:hidden; }
img{ display:block; max-width:100%; height:auto; border:0; }
a{ color:inherit; text-decoration:none; transition:color .18s var(--ease); }
a:hover{ color:var(--aurora); }
button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
ul,ol{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,p{ margin:0; }
h1,h2,h3,h4{ line-height:1.35; font-weight:600; letter-spacing:.01em; }
:focus-visible{ outline:2px solid var(--aurora); outline-offset:2px; border-radius:6px; }

/* 背景装饰 */
.page-bg{ position:fixed; inset:0; z-index:-2; background:var(--bg-void); overflow:hidden; pointer-events:none; }
.page-bg::before{
  content:""; position:absolute; top:-180px; left:-160px; width:760px; height:760px;
  background:radial-gradient(circle, rgba(108,75,246,.18) 0%, rgba(108,75,246,0) 70%);
  filter:blur(120px);
}
.page-bg::after{
  content:""; position:absolute; top:340px; right:-220px; width:700px; height:700px;
  background:radial-gradient(circle, rgba(63,224,200,.14) 0%, rgba(63,224,200,0) 70%);
  filter:blur(130px);
}
.star-field{
  position:fixed; inset:0; z-index:-1; pointer-events:none; opacity:.5;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255,255,255,.5) 50%, transparent 51%),
    radial-gradient(1px 1px at 32% 62%, rgba(255,255,255,.36) 50%, transparent 51%),
    radial-gradient(1px 1px at 58% 28%, rgba(255,255,255,.42) 50%, transparent 51%),
    radial-gradient(1px 1px at 76% 74%, rgba(255,255,255,.3) 50%, transparent 51%),
    radial-gradient(1px 1px at 88% 44%, rgba(255,255,255,.4) 50%, transparent 51%),
    radial-gradient(1px 1px at 44% 88%, rgba(255,255,255,.26) 50%, transparent 51%);
}

.container{ width:100%; max-width:1200px; margin:0 auto; padding:0 20px; }
@media (min-width:768px){ .container{ padding:0 32px; } }
@media (min-width:1280px){ .container{ padding:0 40px; } }

/* ---------- Header ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .28s var(--ease), border-color .28s var(--ease), backdrop-filter .28s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,9,23,.78);
  backdrop-filter:blur(12px) saturate(130%);
  -webkit-backdrop-filter:blur(12px) saturate(130%);
  border-bottom-color:var(--line);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; gap:20px; min-height:72px; }

.logo{ display:inline-flex; align-items:center; gap:10px; flex:0 0 auto; min-height:44px; }
.logo:hover{ color:var(--text); }
.logo-mark{ width:34px; height:34px; color:var(--aurora); flex:0 0 auto; }
.logo-text{ display:flex; flex-direction:column; line-height:1.2; }
.logo-text b{ font-size:16px; font-weight:700; color:var(--text); letter-spacing:.01em; }
.logo-text span{ font-size:11px; color:var(--muted); font-weight:400; letter-spacing:.04em; }

.nav-links{ display:none; align-items:center; gap:4px; }
@media (min-width:1024px){ .nav-links{ display:flex; } }
.nav-link{
  position:relative; display:inline-flex; align-items:center;
  min-height:44px; padding:0 12px; border-radius:8px;
  font-size:14px; color:var(--text-2); white-space:nowrap;
  transition:color .18s var(--ease), background .18s var(--ease);
}
.nav-link::after{
  content:""; position:absolute; left:50%; bottom:8px; width:0; height:2px; border-radius:2px;
  background:var(--aurora); transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav-link:hover{ color:var(--text); }
.nav-link:hover::after{ width:16px; }
.nav-link.is-active{
  color:var(--text);
  background:rgba(108,75,246,.12);
  padding:0 14px;
}
.nav-link.is-active::after{ width:16px; }
.nav-cta{ margin-left:10px; }
@media (min-width:1024px){
  .btn.nav-cta{ height:44px; padding:0 22px; font-size:14px; }
}

.nav-toggle{
  display:inline-flex; flex-direction:column; justify-content:center; gap:5px;
  width:44px; height:44px; padding:0 10px; border-radius:10px;
  border:1px solid var(--line-strong); background:var(--glass);
}
.nav-toggle span{ display:block; height:2px; width:100%; background:var(--text-2); border-radius:2px; }
@media (min-width:1024px){ .nav-toggle{ display:none; } }

.nav-mask{
  position:fixed; inset:0; z-index:70; background:rgba(4,7,20,.62);
  opacity:0; visibility:hidden; transition:opacity .26s var(--ease), visibility .26s var(--ease);
}
.nav-mask.is-open{ opacity:1; visibility:visible; }
.nav-drawer{
  position:fixed; top:0; right:0; z-index:80;
  width:82vw; max-width:360px; height:100%;
  background:rgba(10,15,38,.96);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .26s var(--ease);
  display:flex; flex-direction:column; padding:20px 18px 24px;
}
.nav-drawer.is-open{ transform:translateX(0); }
.drawer-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:12px; }
.drawer-title{ font-size:14px; color:var(--muted); }
.drawer-close{
  width:44px; height:44px; border-radius:10px; border:1px solid var(--line-strong);
  background:var(--glass); display:inline-flex; align-items:center; justify-content:center;
  font-size:18px; color:var(--text-2);
}
.drawer-close:hover{ color:var(--aurora); border-color:rgba(63,224,200,.4); }
.drawer-links{ flex:1 1 auto; display:flex; flex-direction:column; }
.drawer-link{
  min-height:52px; display:flex; align-items:center; padding:0 12px; border-radius:10px;
  color:var(--text-2); font-size:15px; border-bottom:1px solid var(--line);
}
.drawer-link:hover{ color:var(--text); background:rgba(255,255,255,.04); }
.drawer-link.is-active{ color:var(--text); background:rgba(108,75,246,.14); }
.drawer-foot{ padding-top:16px; }
.drawer-foot .btn{ width:100%; }

/* ---------- Buttons ---------- */
.btn{
  position:relative; display:inline-flex; align-items:center; justify-content:center;
  gap:8px; height:48px; padding:0 28px; border-radius:var(--r-btn);
  font-size:15px; font-weight:500; white-space:nowrap; overflow:hidden;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease), filter .2s var(--ease);
}
@media (min-width:1024px){ .btn{ height:52px; } }
.btn-primary{
  background:var(--grad); color:#fff; box-shadow:var(--sh-glow);
}
.btn-primary:hover{ color:#fff; transform:translateY(-2px); box-shadow:0 0 0 1px rgba(108,75,246,.55), 0 16px 40px rgba(108,75,246,.36); }
.btn-primary:active{ transform:translateY(0); filter:brightness(.94); }
.btn-primary::before{
  content:""; position:absolute; top:0; left:-60%; width:40%; height:100%;
  background:linear-gradient(100deg, transparent, rgba(255,255,255,.32), transparent);
  transform:skewX(-18deg); transition:left .16s linear;
}
.btn-primary:hover::before{ left:120%; }
.btn-ghost{
  background:var(--glass); color:var(--text);
  border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
}
.btn-ghost:hover{ color:var(--text); border-color:rgba(63,224,200,.4); box-shadow:var(--sh-aurora); transform:translateY(-2px); }
.btn-text{
  display:inline-flex; align-items:center; gap:6px; height:44px;
  color:var(--aurora); font-size:14px; font-weight:500;
}
.btn-text .arrow{ transition:transform .18s var(--ease); }
.btn-text:hover .arrow{ transform:translateX(4px); }
.btn[disabled], .btn.is-disabled{ opacity:.42; cursor:not-allowed; }

/* ---------- Badge ---------- */
.badge{
  display:inline-flex; align-items:center; gap:6px;
  padding:4px 10px; border-radius:var(--r-badge);
  font-size:12px; font-weight:500; line-height:1.6;
  border:1px solid transparent;
}
.badge-primary{ color:var(--nebula-soft); background:rgba(108,75,246,.12); border-color:rgba(108,75,246,.34); }
.badge-aurora{ color:var(--aurora); background:rgba(63,224,200,.12); border-color:rgba(63,224,200,.3); }
.badge-stardust{ color:var(--stardust); background:rgba(242,200,121,.12); border-color:rgba(242,200,121,.3); }
.badge-muted{ color:var(--text-2); background:rgba(255,255,255,.06); border-color:var(--line-strong); }

/* ---------- Page banner ---------- */
.page-banner{
  position:relative; margin-top:72px;
  padding:56px 0 44px; overflow:hidden;
  border-bottom:1px solid var(--line);
}
@media (min-width:1024px){ .page-banner{ padding:76px 0 56px; } }
.banner-bg{
  position:absolute; inset:0;
  background-size:cover; background-position:center;
  opacity:.42; filter:saturate(.9);
}
.banner-bg::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(6,9,23,.72) 0%, rgba(6,9,23,.86) 55%, var(--bg-void) 100%);
}
.banner-inner{ position:relative; z-index:2; }
.breadcrumb{
  display:flex; flex-wrap:wrap; align-items:center; gap:8px;
  font-size:13px; color:var(--muted); margin-bottom:14px;
}
.breadcrumb a{ color:var(--muted); }
.breadcrumb a:hover{ color:var(--aurora); text-decoration:underline; text-underline-offset:3px; }
.breadcrumb .current{ color:var(--text); }
.banner-title{
  font-size:clamp(28px,4.6vw,44px); line-height:1.28; font-weight:700;
  max-width:820px; margin-bottom:14px;
}
.banner-sub{ max-width:640px; color:var(--text-2); font-size:16px; }
.banner-tags{ display:flex; flex-wrap:wrap; gap:8px; margin-top:20px; }
.banner-arc{
  position:absolute; right:-10%; top:14%; width:60%; height:1px;
  background:linear-gradient(90deg, rgba(63,224,200,0) 0%, rgba(63,224,200,.6) 45%, rgba(63,224,200,0) 100%);
  transform:rotate(-8deg); pointer-events:none;
}
@media (max-width:1023px){ .banner-arc{ display:none; } }

/* ---------- Section base ---------- */
.section{ padding:var(--sec-gap) 0; }
.section-head{ max-width:720px; margin-bottom:36px; }
.eyebrow{
  display:inline-block; font-size:12px; font-weight:500; letter-spacing:.08em;
  color:var(--aurora); margin-bottom:12px;
}
.section-head h2{ font-size:clamp(22px,3vw,32px); margin-bottom:12px; }
.section-head p{ color:var(--text-2); font-size:16px; }
.section-head--row{
  max-width:none; display:flex; flex-wrap:wrap; align-items:flex-end;
  justify-content:space-between; gap:16px;
}

/* ---------- 卡片基础 ---------- */
.card{
  border-radius:var(--r-card);
  border:1px solid #1E2650;
  background:linear-gradient(180deg,#121838,#0C1130);
  transition:transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.card:hover{ transform:translateY(-3px); border-color:rgba(108,75,246,.5); box-shadow:var(--sh-md); }
.glass{
  background:var(--glass);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-card);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.media{ position:relative; overflow:hidden; border-radius:var(--r-img); background:var(--panel); border:1px solid var(--line); }
.media img{ width:100%; aspect-ratio:16/9; object-fit:cover; transition:transform .28s var(--ease); }
.card:hover .media img{ transform:scale(1.03); }

/* ---------- 时间轴 ---------- */
.timeline{ position:relative; padding-left:34px; }
@media (min-width:768px){ .timeline{ padding-left:56px; } }
.timeline::before{
  content:""; position:absolute; left:11px; top:8px; bottom:8px; width:2px;
  background:linear-gradient(180deg, rgba(108,75,246,.9) 0%, rgba(74,123,240,.5) 48%, rgba(63,224,200,.05) 100%);
}
@media (min-width:768px){ .timeline::before{ left:17px; } }
.tl-item{ position:relative; padding-bottom:32px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-node{
  position:absolute; left:-34px; top:2px;
  width:24px; height:24px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:11px; font-weight:600; color:#0A0F26;
  background:var(--grad);
  box-shadow:0 0 0 4px rgba(6,9,23,.9), 0 0 0 5px rgba(108,75,246,.4);
}
@media (min-width:768px){ .tl-node{ left:-56px; width:36px; height:36px; font-size:13px; } }
.tl-node.is-soft{
  color:var(--text-2);
  background:rgba(255,255,255,.05);
  box-shadow:0 0 0 4px rgba(6,9,23,.9), 0 0 0 5px rgba(255,255,255,.14);
}
.tl-card{ padding:20px; }
@media (min-width:768px){ .tl-card{ padding:24px; } }
.tl-head{ display:flex; flex-wrap:wrap; align-items:center; gap:10px; margin-bottom:10px; }
.tl-card h3{ font-size:clamp(18px,2vw,21px); }
.tl-card > p{ color:var(--text-2); }
.tl-media{ margin-bottom:16px; }
.tl-list{ margin-top:14px; display:grid; gap:8px; }
.tl-list li{
  position:relative; padding-left:18px; font-size:14px; color:var(--text-2);
}
.tl-list li::before{
  content:""; position:absolute; left:0; top:12px; width:10px; height:2px; border-radius:2px;
  background:var(--aurora);
}
.tl-meta{ display:flex; flex-wrap:wrap; gap:14px; margin-top:16px; font-size:13px; color:var(--muted); }

/* ---------- 速查卡 ---------- */
.quick-grid{
  display:grid; gap:16px;
  grid-template-columns:1fr;
}
@media (min-width:640px){ .quick-grid{ grid-template-columns:repeat(2,1fr); } }
@media (min-width:1024px){ .quick-grid{ grid-template-columns:repeat(4,1fr); } }
.quick-card{ padding:20px; display:flex; flex-direction:column; gap:10px; }
.quick-icon{
  width:36px; height:36px; border-radius:10px; display:inline-flex; align-items:center; justify-content:center;
  border:1px solid rgba(63,224,200,.3); color:var(--aurora); background:rgba(63,224,200,.1);
}
.quick-card h3{ font-size:16px; }
.quick-card p{ font-size:14px; color:var(--text-2); }

/* ---------- 说明段落 ---------- */
.read-grid{ display:grid; gap:28px; grid-template-columns:1fr; }
@media (min-width:1024px){ .read-grid{ grid-template-columns:minmax(0,7fr) minmax(0,5fr); gap:44px; } }
.read-body p{ color:var(--text-2); margin-bottom:18px; }
.read-body p:last-child{ margin-bottom:0; }
.read-body strong{ color:var(--text); font-weight:600; }
.aside-card{ padding:22px; position:sticky; top:96px; }
.aside-card h3{ font-size:17px; margin-bottom:14px; }
.aside-list li{
  display:flex; gap:10px; padding:10px 0; border-bottom:1px solid var(--line);
  font-size:14px; color:var(--text-2);
}
.aside-list li:last-child{ border-bottom:0; }
.aside-list .dot{
  flex:0 0 auto; width:6px; height:6px; border-radius:50%; margin-top:9px;
  background:var(--aurora);
}

/* ---------- FAQ ---------- */
.faq-list{ display:grid; gap:12px; max-width:880px; }
.faq-item{ border-radius:var(--r-card); border:1px solid #1E2650; background:linear-gradient(180deg,#121838,#0C1130); overflow:hidden; }
.faq-q{
  width:100%; display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:18px 20px; text-align:left; font-size:17px; font-weight:600; color:var(--text);
  min-height:44px;
}
.faq-q:hover{ color:var(--aurora); }
.faq-mark{ position:relative; flex:0 0 auto; width:16px; height:16px; }
.faq-mark::before,.faq-mark::after{
  content:""; position:absolute; left:50%; top:50%; background:var(--aurora); border-radius:2px;
  transform:translate(-50%,-50%); transition:transform .26s var(--ease), opacity .26s var(--ease);
}
.faq-mark::before{ width:14px; height:2px; }
.faq-mark::after{ width:2px; height:14px; }
.faq-item.is-open .faq-mark::after{ transform:translate(-50%,-50%) rotate(90deg); opacity:0; }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .26s var(--ease); }
.faq-a-inner{
  padding:0 20px 18px; border-top:1px solid var(--line);
  margin-top:0; padding-top:16px; color:var(--text-2); font-size:16px;
}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  position:relative; overflow:hidden;
  border-radius:var(--r-wrap);
  padding:40px 24px;
  border:1px solid transparent;
  background:
    linear-gradient(180deg,#121838,#0C1130) padding-box,
    var(--grad) border-box;
  text-align:center;
}
@media (min-width:768px){ .cta-panel{ padding:56px 48px; } }
.cta-panel::after{
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.5;
  background-image:
    radial-gradient(1px 1px at 18% 26%, rgba(255,255,255,.5) 50%, transparent 51%),
    radial-gradient(1px 1px at 42% 68%, rgba(255,255,255,.36) 50%, transparent 51%),
    radial-gradient(1px 1px at 68% 34%, rgba(255,255,255,.42) 50%, transparent 51%),
    radial-gradient(1px 1px at 86% 72%, rgba(255,255,255,.3) 50%, transparent 51%);
}
.cta-panel > *{ position:relative; z-index:2; }
.cta-panel h2{ font-size:clamp(22px,3vw,30px); margin-bottom:12px; }
.cta-panel p{ color:var(--text-2); max-width:620px; margin:0 auto 24px; }
.cta-actions{ display:flex; flex-wrap:wrap; gap:14px; justify-content:center; }
.back-home{ margin-top:20px; text-align:center; }

/* ---------- Footer ---------- */
.site-footer{
  margin-top:var(--sec-gap);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(10,15,38,.6), rgba(6,9,23,.95));
  padding:48px 0 24px;
}
.footer-grid{ display:grid; gap:32px; grid-template-columns:1fr; }
@media (min-width:640px){ .footer-grid{ grid-template-columns:repeat(2,1fr); } }
@media (min-width:1024px){ .footer-grid{ grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; } }
.footer-brand p{ margin-top:14px; color:var(--muted); font-size:14px; max-width:300px; }
.footer-col h4{ font-size:14px; color:var(--text); margin-bottom:14px; font-weight:600; }
.footer-col ul{ display:grid; gap:10px; }
.footer-col a{ font-size:14px; color:var(--text-2); }
.footer-col a:hover{ color:var(--aurora); text-decoration:underline; text-underline-offset:3px; }
.footer-bottom{
  margin-top:36px; padding-top:18px; border-top:1px solid var(--line);
  display:flex; flex-wrap:wrap; gap:10px; justify-content:space-between;
  font-size:13px; color:var(--muted);
}
.footer-bottom a{ color:var(--muted); }
.footer-bottom a:hover{ color:var(--aurora); text-decoration:underline; text-underline-offset:3px; }

@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; }
}

/* roulang page: category4 */
:root{
    --void:#060917;
    --deep:#0A0F26;
    --panel:#111735;
    --panel-2:#0C1130;
    --nebula:#6C4BF6;
    --nebula-h:#5A3AD9;
    --nebula-l:#9C86FF;
    --aurora:#3FE0C8;
    --stardust:#F2C879;
    --text:#E9EDFF;
    --sub:#A6AECF;
    --dim:#6D769B;
    --line:rgba(255,255,255,.08);
    --border:#1E2650;
    --grad:linear-gradient(135deg,#6C4BF6 0%,#4A7BF0 52%,#3FE0C8 100%);
    --r-card:16px;
    --r-btn:12px;
    --r-badge:8px;
    --r-wrap:24px;
    --sh-sm:0 2px 8px rgba(0,0,0,.35);
    --sh-md:0 12px 32px rgba(4,8,28,.55);
    --sh-glow:0 0 0 1px rgba(108,75,246,.45), 0 10px 34px rgba(108,75,246,.28);
    --ease:cubic-bezier(.22,.61,.36,1);
    --maxw:1200px;
  }

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

  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}

  html body{
    margin:0;
    background-color:var(--void);
    background-image:
      radial-gradient(620px 420px at 84% -8%, rgba(108,75,246,.16), transparent 70%),
      radial-gradient(520px 380px at 4% 10%, rgba(63,224,200,.09), transparent 72%);
    background-repeat:no-repeat;
    color:var(--text);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }

  html body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    opacity:.5;
    background-image:
      radial-gradient(circle at 14px 26px, rgba(233,237,255,.45) 0, rgba(233,237,255,0) 1.6px),
      radial-gradient(circle at 88px 102px, rgba(233,237,255,.28) 0, rgba(233,237,255,0) 1.6px),
      radial-gradient(circle at 152px 44px, rgba(63,224,200,.32) 0, rgba(63,224,200,0) 1.6px),
      radial-gradient(circle at 46px 158px, rgba(156,134,255,.28) 0, rgba(156,134,255,0) 1.6px);
    background-size:180px 180px;
  }

  img{display:block;max-width:100%;}
  a{color:inherit;text-decoration:none;}
  ul,ol{margin:0;padding:0;list-style:none;}
  button{font:inherit;color:inherit;}

  :focus-visible{outline:2px solid var(--aurora);outline-offset:2px;border-radius:6px;}

  .container{
    width:100%;
    max-width:var(--maxw);
    margin:0 auto;
    padding:0 20px;
    position:relative;
    z-index:1;
  }
  @media (min-width:768px){ .container{padding:0 32px;} }
  @media (min-width:1280px){ .container{padding:0 40px;} }

  .skip-link{
    position:absolute;left:-9999px;top:0;z-index:99;
    background:var(--panel);color:var(--text);padding:10px 16px;border-radius:8px;
  }
  .skip-link:focus{left:16px;top:12px;}

  /* ---------- Header ---------- */
  .site-header{
    position:fixed;top:0;left:0;right:0;z-index:60;
    padding:12px 0;
    border-bottom:1px solid transparent;
    transition:background-color .28s var(--ease),border-color .28s var(--ease),padding .28s var(--ease);
  }
  .site-header.is-scrolled{
    background-color:rgba(6,9,23,.72);
    -webkit-backdrop-filter:blur(12px) saturate(120%);
    backdrop-filter:blur(12px) saturate(120%);
    border-bottom-color:var(--line);
    padding:8px 0;
  }
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;}

  .logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);}
  .logo-mark{width:34px;height:34px;flex:none;color:var(--aurora);}
  .logo-text{display:flex;flex-direction:column;line-height:1.2;}
  .logo-text b{font-size:16px;font-weight:700;color:var(--text);letter-spacing:.01em;}
  .logo-text span{font-size:11px;color:var(--dim);letter-spacing:.08em;}

  .nav-links{display:flex;align-items:center;gap:4px;}
  .nav-link{
    position:relative;
    display:inline-flex;align-items:center;
    min-height:44px;padding:8px 12px;border-radius:8px;
    font-size:14px;color:var(--sub);
    transition:color .2s var(--ease),background-color .2s var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:6px;transform:translateX(-50%);
    width:0;height:2px;border-radius:2px;background:var(--aurora);
    transition:width .22s var(--ease);
  }
  .nav-link:hover{color:var(--text);}
  .nav-link:hover::after{width:16px;}
  .nav-link.is-active{color:var(--text);background:rgba(108,75,246,.12);}
  .nav-link.is-active::after{width:16px;}
  .nav-cta{margin-left:10px;}

  .nav-toggle{
    display:none;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:10px;
    border:1px solid rgba(255,255,255,.14);
    background:rgba(255,255,255,.05);
    color:var(--text);cursor:pointer;
    transition:border-color .2s var(--ease),background-color .2s var(--ease);
  }
  .nav-toggle:hover{border-color:rgba(63,224,200,.4);background:rgba(255,255,255,.08);}
  .nav-toggle svg{width:20px;height:20px;}

  @media (max-width:1023px){
    .nav-links{display:none;}
    .nav-toggle{display:inline-flex;}
  }

  /* ---------- Drawer ---------- */
  .drawer-mask{
    position:fixed;inset:0;z-index:70;
    background:rgba(4,6,18,.66);
    -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
    opacity:0;pointer-events:none;
    transition:opacity .26s var(--ease);
  }
  .drawer-mask.is-open{opacity:1;pointer-events:auto;}
  .drawer{
    position:fixed;top:0;right:0;z-index:80;
    height:100%;width:82vw;max-width:360px;
    display:flex;flex-direction:column;
    padding:18px 18px 24px;
    background:linear-gradient(180deg,#0C1130,#080C20);
    border-left:1px solid var(--line);
    transform:translateX(102%);
    transition:transform .26s var(--ease);
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
  .drawer-title{font-size:13px;color:var(--dim);letter-spacing:.1em;}
  .drawer-close{
    width:44px;height:44px;border-radius:10px;
    border:1px solid rgba(255,255,255,.14);
    background:rgba(255,255,255,.05);
    font-size:20px;line-height:1;cursor:pointer;
  }
  .drawer-links{display:flex;flex-direction:column;gap:4px;}
  .drawer-links a{
    display:flex;align-items:center;min-height:52px;padding:0 14px;
    border-radius:10px;font-size:15px;color:var(--sub);
    border:1px solid transparent;
    transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
  }
  .drawer-links a:hover{color:var(--text);background:rgba(255,255,255,.045);}
  .drawer-links a.is-active{color:var(--text);background:rgba(108,75,246,.14);border-color:rgba(108,75,246,.35);}
  .drawer-cta{margin-top:auto;width:100%;}
  body.no-scroll{overflow:hidden;}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 20px;
    border-radius:var(--r-btn);
    font-size:15px;font-weight:600;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .18s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  }
  .btn-primary{
    position:relative;overflow:hidden;
    min-height:48px;padding:0 28px;color:#fff;
    background:var(--grad);
    box-shadow:var(--sh-glow);
  }
  .btn-primary::after{
    content:"";position:absolute;top:0;bottom:0;left:-60%;width:40%;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
    transform:skewX(-18deg);
    transition:left .16s ease-out;
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(108,75,246,.6),0 16px 40px rgba(108,75,246,.36);}
  .btn-primary:hover::after{left:120%;}
  .btn-primary:active{transform:translateY(0);filter:brightness(.94);}
  @media (min-width:1024px){ .btn-primary{min-height:52px;} }

  .btn-ghost{
    background:rgba(255,255,255,.045);
    border-color:rgba(255,255,255,.18);
    color:var(--text);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }
  .btn-ghost:hover{
    border-color:rgba(63,224,200,.4);
    box-shadow:0 0 0 1px rgba(63,224,200,.25),0 8px 26px rgba(63,224,200,.16);
  }
  .btn-text{
    padding:0;min-height:44px;color:var(--aurora);font-weight:600;background:none;border:none;
  }
  .btn-text .arrow{display:inline-block;transition:transform .2s var(--ease);}
  .btn-text:hover .arrow{transform:translateX(4px);}

  /* ---------- Badges ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:6px 12px;font-size:12px;font-weight:500;
    border-radius:var(--r-badge);
    border:1px solid rgba(255,255,255,.14);
    background:rgba(255,255,255,.05);
    color:var(--sub);
  }
  .badge-aurora{border-color:rgba(63,224,200,.4);background:rgba(63,224,200,.12);color:#8ff0e2;}
  .badge-nebula{border-color:rgba(108,75,246,.45);background:rgba(108,75,246,.14);color:#c3b7ff;}
  .badge-star{border-color:rgba(242,200,121,.38);background:rgba(242,200,121,.12);color:#f4d79b;}

  .tag{
    display:inline-block;padding:4px 10px;
    border-radius:var(--r-badge);
    font-size:12px;font-weight:500;
    border:1px solid rgba(255,255,255,.14);
    background:rgba(255,255,255,.05);
    color:var(--sub);
    white-space:nowrap;
  }
  .tag-easy{border-color:rgba(78,216,166,.35);background:rgba(78,216,166,.12);color:#8ce6c3;}
  .tag-mid{border-color:rgba(242,200,121,.35);background:rgba(242,200,121,.12);color:#f4d79b;}

  /* ---------- Banner ---------- */
  .banner{
    position:relative;
    padding:148px 0 60px;
    border-bottom:1px solid var(--line);
    background-image:
      linear-gradient(180deg, rgba(6,9,23,.80) 0%, rgba(6,9,23,.72) 44%, rgba(6,9,23,.96) 100%),
      url("/assets/images/backpic/back-2.png");
    background-size:cover;
    background-position:center;
    background-repeat:no-repeat;
  }
  @media (min-width:1024px){ .banner{padding:168px 0 72px;} }

  .crumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--dim);margin-bottom:14px;
  }
  .crumb a{color:var(--dim);transition:color .2s var(--ease);}
  .crumb a:hover{color:var(--aurora);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
  .crumb-sep{color:rgba(255,255,255,.24);}
  .crumb-current{color:var(--text);}

  .banner-title{
    margin:0 0 14px;
    font-size:clamp(28px,4.4vw,44px);
    line-height:1.28;font-weight:700;
    max-width:860px;
  }
  .banner-sub{
    margin:0 0 22px;
    font-size:clamp(15px,1.4vw,17px);
    line-height:1.8;color:var(--sub);
    max-width:700px;
  }
  .banner-tags{display:flex;flex-wrap:wrap;gap:10px;}

  /* ---------- Sections ---------- */
  .section{padding:64px 0;position:relative;z-index:1;}
  @media (min-width:768px){ .section{padding:88px 0;} }

  .section-head{max-width:760px;margin-bottom:30px;}
  .section-eyebrow{
    display:inline-block;margin-bottom:12px;
    font-size:12px;font-weight:500;letter-spacing:.1em;
    color:var(--aurora);
  }
  .section-title{
    margin:0 0 12px;
    font-size:clamp(22px,2.7vw,32px);
    line-height:1.35;font-weight:600;
  }
  .section-desc{margin:0;color:var(--sub);font-size:16px;}

  /* ---------- 8/4 区块 ---------- */
  .grid-split{display:grid;gap:24px;}
  @media (min-width:1024px){
    .grid-split{grid-template-columns:8fr 4fr;gap:34px;align-items:start;}
  }

  .prose-block p{color:var(--sub);font-size:16px;line-height:1.9;margin:0 0 18px;}
  .prose-block p:last-child{margin-bottom:0;}
  .prose-block strong{color:var(--text);font-weight:600;}

  .side-card{
    border:1px solid var(--border);
    border-radius:var(--r-card);
    background:linear-gradient(180deg,#121838,#0C1130);
    overflow:hidden;
    box-shadow:var(--sh-md);
    transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
  }
  .side-card:hover{transform:translateY(-3px);border-color:rgba(108,75,246,.5);}
  .side-card img{width:100%;aspect-ratio:16/9;object-fit:cover;object-position:center;}
  .side-card-body{padding:18px 20px 22px;}
  .side-card-body h3{margin:0 0 8px;font-size:17px;font-weight:600;}
  .side-card-body p{margin:0;color:var(--sub);font-size:14px;line-height:1.8;}

  /* ---------- 对照表 ---------- */
  .table-shell{
    border:1px solid var(--border);
    border-radius:var(--r-card);
    background:linear-gradient(180deg,#121838,#0C1130);
    overflow:hidden;
    box-shadow:var(--sh-md);
  }
  .compare-table{width:100%;border-collapse:collapse;}
  .compare-table thead th{
    background:rgba(255,255,255,.045);
    -webkit-backdrop-filter:blur(14px) saturate(120%);
    backdrop-filter:blur(14px) saturate(120%);
    padding:16px 18px;
    font-size:13px;font-weight:500;letter-spacing:.04em;
    color:var(--sub);text-align:left;
    border-bottom:1px solid var(--line);
    white-space:nowrap;
  }
  .compare-table tbody td{
    padding:16px 18px;
    font-size:15px;line-height:1.75;
    color:var(--sub);
    border-bottom:1px solid var(--line);
    vertical-align:top;
    transition:background-color .2s var(--ease);
  }
  .compare-table tbody tr:last-child td{border-bottom:none;}
  .compare-table tbody tr:hover td{background:rgba(108,75,246,.06);}
  .compare-table td:first-child{
    color:#c3b7ff;font-weight:600;font-size:15px;
  }

  @media (max-width:767px){
    .compare-table thead{display:none;}
    .compare-table,.compare-table tbody,.compare-table tr,.compare-table td{display:block;width:100%;}
    .compare-table tbody tr{
      padding:6px 0 10px;
      border-bottom:1px solid var(--line);
    }
    .compare-table tbody tr:last-child{border-bottom:none;}
    .compare-table tbody td{
      display:flex;gap:14px;justify-content:space-between;align-items:baseline;
      border-bottom:none;padding:8px 16px;font-size:14.5px;
    }
    .compare-table tbody td::before{
      content:attr(data-label);
      flex:none;font-size:12px;letter-spacing:.04em;color:var(--dim);
    }
    .compare-table td:first-child{
      display:block;padding:16px 16px 10px;font-size:16px;
    }
    .compare-table td:first-child::before{display:none;}
    .compare-table tbody tr:hover td{background:transparent;}
  }

  /* ---------- 步骤 ---------- */
  .steps{display:grid;gap:20px;}
  @media (min-width:768px){ .steps{grid-template-columns:repeat(4,1fr);} }

  .step{
    padding:22px;
    border:1px solid var(--border);
    border-radius:var(--r-card);
    background:linear-gradient(180deg,#121838,#0C1130);
    transition:transform .22s ease-out,border-color .22s ease-out;
  }
  .step:hover{transform:translateY(-3px);border-color:rgba(108,75,246,.5);}
  .step-num{
    display:inline-flex;align-items:center;justify-content:center;
    width:32px;height:32px;margin-bottom:12px;
    border-radius:50%;
    font-size:14px;font-weight:600;color:#fff;
    background:var(--grad);
  }
  .step h3{margin:0 0 8px;font-size:17px;font-weight:600;}
  .step p{margin:0;color:var(--sub);font-size:14.5px;line-height:1.78;}

  @media (max-width:767px){
    .steps{position:relative;padding-left:22px;gap:20px;}
    .steps::before{
      content:"";position:absolute;left:6px;top:8px;bottom:8px;width:2px;
      border-radius:2px;
      background:linear-gradient(180deg,rgba(63,224,200,.7),rgba(108,75,246,.14));
    }
    .step{padding:17px;}
    .step-num{width:28px;height:28px;font-size:13px;margin-bottom:10px;}
  }

  /* ---------- 清单 ---------- */
  .check-list{display:grid;gap:12px;}
  @media (min-width:640px){ .check-list{grid-template-columns:1fr 1fr;} }
  .check-list li{
    position:relative;
    padding:14px 16px 14px 38px;
    border:1px solid rgba(255,255,255,.10);
    border-radius:12px;
    background:rgba(255,255,255,.035);
    color:var(--sub);
    font-size:15px;line-height:1.75;
    transition:border-color .2s var(--ease),background-color .2s var(--ease);
  }
  .check-list li:hover{border-color:rgba(63,224,200,.34);background:rgba(63,224,200,.05);}
  .check-list li::before{
    content:"";position:absolute;left:16px;top:24px;
    width:14px;height:2px;border-radius:2px;
    background:var(--aurora);
  }

  /* ---------- FAQ ---------- */
  .faq{display:grid;gap:12px;}
  .faq-item{
    border:1px solid var(--border);
    border-radius:var(--r-card);
    background:linear-gradient(180deg,#121838,#0C1130);
    overflow:hidden;
    transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
  }
  .faq-item.is-open{
    border-color:rgba(108,75,246,.5);
    box-shadow:0 0 0 1px rgba(108,75,246,.22);
  }
  .faq-q{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    width:100%;min-height:44px;
    padding:18px 20px;
    font-size:17px;font-weight:600;color:var(--text);
    text-align:left;background:none;border:none;cursor:pointer;
  }
  .faq-icon{position:relative;flex:none;width:16px;height:16px;}
  .faq-icon::before,
  .faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;
    background:var(--aurora);border-radius:2px;
    transform:translate(-50%,-50%);
    transition:transform .26s var(--ease),opacity .26s var(--ease);
  }
  .faq-icon::before{width:14px;height:2px;}
  .faq-icon::after{width:2px;height:14px;}
  .faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease);}
  .faq-a-inner{
    padding:14px 20px 20px;
    border-top:1px solid var(--line);
    color:var(--sub);font-size:16px;line-height:1.85;
  }

  /* ---------- CTA 面板 ---------- */
  .cta-panel{
    position:relative;
    padding:44px 24px;
    border-radius:var(--r-wrap);
    border:1px solid rgba(108,75,246,.45);
    background:
      linear-gradient(135deg,rgba(108,75,246,.16),rgba(63,224,200,.08)),
      linear-gradient(180deg,#121838,#0C1130);
    overflow:hidden;
    text-align:center;
  }
  @media (min-width:768px){ .cta-panel{padding:56px 48px;} }
  .cta-panel::before{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.45;
    background-image:
      radial-gradient(circle at 18% 30%, rgba(233,237,255,.35) 0, rgba(233,237,255,0) 1.6px),
      radial-gradient(circle at 72% 58%, rgba(63,224,200,.35) 0, rgba(63,224,200,0) 1.6px),
      radial-gradient(circle at 44% 84%, rgba(233,237,255,.25) 0, rgba(233,237,255,0) 1.6px);
    background-size:180px 180px;
  }
  .cta-panel h2{
    position:relative;z-index:1;
    margin:0 0 12px;
    font-size:clamp(22px,3vw,30px);line-height:1.35;font-weight:600;
  }
  .cta-panel p{
    position:relative;z-index:1;
    margin:0 0 26px;color:var(--sub);font-size:16px;
  }
  .cta-actions{
    position:relative;z-index:1;
    display:flex;flex-wrap:wrap;gap:14px;justify-content:center;
  }

  /* ---------- Footer ---------- */
  .site-footer{
    margin-top:40px;
    padding:56px 0 26px;
    border-top:1px solid var(--line);
    background:linear-gradient(180deg,rgba(10,15,38,.62),rgba(6,9,23,.96));
    position:relative;z-index:1;
  }
  .footer-grid{display:grid;gap:32px;}
  @media (min-width:768px){ .footer-grid{grid-template-columns:1fr 1fr;} }
  @media (min-width:1024px){ .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px;} }

  .footer-brand p{
    margin:14px 0 0;max-width:320px;
    color:var(--sub);font-size:14px;line-height:1.8;
  }
  .footer-col h4{
    margin:0 0 14px;
    font-size:14px;font-weight:600;color:var(--text);letter-spacing:.02em;
  }
  .footer-col ul{display:grid;gap:10px;}
  .footer-col a{
    font-size:14px;color:var(--sub);
    transition:color .2s var(--ease);
  }
  .footer-col a:hover{
    color:var(--aurora);
    text-decoration:underline;
    text-underline-offset:3px;
    text-decoration-thickness:1px;
  }
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:10px 20px;
    justify-content:space-between;align-items:center;
    margin-top:36px;padding-top:18px;
    border-top:1px solid var(--line);
    color:var(--dim);font-size:13px;
  }
  .footer-bottom a{color:var(--dim);}
  .footer-bottom a:hover{color:var(--aurora);}

  @media (prefers-reduced-motion: reduce){
    *,*::before,*::after{
      animation-duration:.001ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.001ms !important;
    }
    html{scroll-behavior:auto;}
  }