/* roulang page: index */
:root{
  --bg-0:#090A0F;
  --bg-1:#0F1118;
  --bg-2:#151823;
  --bg-3:#1C2030;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --c-primary:#2CE8B4;
  --c-primary-dim:#1BA98A;
  --c-secondary:#7C5CFF;
  --c-accent:#FF3E7F;
  --c-warn:#FFC24D;
  --t-1:#EEF2F8;
  --t-2:#A7B0C0;
  --t-3:#6C7486;
  --radius-card:18px;
  --radius-img:14px;
  --radius-btn:12px;
  --radius-pill:999px;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-card:0 1px 0 rgba(255,255,255,.04), 0 20px 40px -32px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px var(--c-primary), 0 18px 46px -22px rgba(44,232,180,.45);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg-0);
  color:var(--t-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:24px 24px;
}
body::after{
  content:"";
  position:fixed;
  top:-260px;
  right:-200px;
  width:760px;
  height:760px;
  pointer-events:none;
  z-index:0;
  background:radial-gradient(circle at center, rgba(44,232,180,.16), rgba(124,92,255,.10) 42%, transparent 70%);
  filter:blur(10px);
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:none;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;}
p{margin:0;}
time,.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
  position:relative;
  z-index:1;
}
@media(min-width:768px){.container{padding-left:32px;padding-right:32px;}}
@media(min-width:1024px){.container{padding-left:40px;padding-right:40px;}}
@media(min-width:1536px){.container{max-width:1280px;}}

.section{padding:56px 0;position:relative;z-index:1;}
@media(min-width:768px){.section{padding:72px 0;}}
@media(min-width:1024px){.section{padding:104px 0;}}
.section-line{border-top:1px solid var(--line);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background-color:rgba(15,17,24,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg, transparent, var(--c-primary), transparent);
  opacity:.55;
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:60px;
}
@media(min-width:1024px){.header-inner{height:68px;}}

.logo{display:inline-flex;align-items:center;gap:8px;flex-shrink:0;}
.logo-mark{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--t-1);
}
.logo-badge{
  font-size:11px;
  letter-spacing:.14em;
  padding:2px 8px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(44,232,180,.55);
  color:var(--c-primary);
  line-height:1.6;
}

.nav-desktop{display:none;align-items:center;gap:4px;}
@media(min-width:1024px){.nav-desktop{display:flex;}}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--t-2);
  border-radius:var(--radius-btn);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
  border-radius:2px;
}
.nav-link:hover{color:var(--t-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--t-1);}
.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{text-shadow:0 0 12px rgba(44,232,180,.45);}

.nav-more{position:relative;}
.nav-more-btn{display:inline-flex;align-items:center;gap:6px;}
.nav-more-btn .caret{font-size:10px;color:var(--t-3);transition:transform .2s var(--ease);}
.nav-more:hover .caret{transform:rotate(180deg);}
.nav-dropdown{
  position:absolute;
  top:calc(100% + 10px);
  left:0;
  min-width:230px;
  background:var(--bg-2);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-card);
  padding:8px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-6px);
  transition:opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
  box-shadow:0 24px 48px -28px rgba(0,0,0,.95);
}
.nav-more:hover .nav-dropdown,
.nav-more:focus-within .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0);}
.nav-dropdown a{
  display:block;
  padding:9px 12px;
  font-size:14px;
  color:var(--t-2);
  border-radius:10px;
  border-left:2px solid transparent;
}
.nav-dropdown a:hover{
  background:rgba(255,255,255,.04);
  color:var(--t-1);
  border-left-color:var(--c-primary);
}

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

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  transition:all .2s var(--ease);
  letter-spacing:.01em;
}
.btn-primary{
  background:var(--c-primary);
  color:var(--bg-0);
  box-shadow:0 12px 30px -18px rgba(44,232,180,.8);
}
.btn-primary:hover{
  filter:brightness(1.08);
  box-shadow:0 0 0 1px var(--c-primary), 0 18px 46px -22px rgba(44,232,180,.7);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--t-2);
}
.btn-ghost:hover{
  border-color:var(--c-primary);
  color:var(--t-1);
}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}
.btn:focus-visible,.nav-link:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid rgba(44,232,180,.75);
  outline-offset:2px;
}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--c-primary);
  font-size:14px;
  font-weight:600;
}
.link-arrow .arw{transition:transform .2s var(--ease);}
.link-arrow:hover{color:var(--c-primary);filter:brightness(1.1);}
.link-arrow:hover .arw{transform:translateX(4px);}

/* ---------- Burger + drawer ---------- */
.burger{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:42px;
  height:42px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-btn);
  padding:0 10px;
}
.burger span{display:block;height:2px;background:var(--t-1);border-radius:2px;transition:all .2s var(--ease);}
@media(min-width:1024px){.burger{display:none;}}
.mobile-drawer{
  display:none;
  position:fixed;
  inset:60px 0 0 0;
  background:var(--bg-0);
  border-top:1px solid var(--c-primary);
  padding:16px 20px 40px;
  z-index:55;
  overflow-y:auto;
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:flex;
  align-items:center;
  min-height:48px;
  font-size:16px;
  color:var(--t-2);
  border-bottom:1px solid var(--line);
  padding:0 4px;
  border-left:2px solid transparent;
}
.mobile-drawer a:hover,.mobile-drawer a.active{
  color:var(--t-1);
  border-left-color:var(--c-primary);
  padding-left:12px;
}
.mobile-drawer .drawer-label{
  font-size:12px;
  letter-spacing:.12em;
  color:var(--t-3);
  padding:20px 4px 8px;
}

/* ---------- Badges & typography helpers ---------- */
.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--c-primary);
  border:1px solid rgba(44,232,180,.45);
  border-radius:var(--radius-pill);
  padding:5px 14px;
  line-height:1.5;
}
.badge{
  display:inline-block;
  font-size:12px;
  letter-spacing:.06em;
  padding:3px 10px;
  border-radius:var(--radius-pill);
  color:var(--c-primary);
  background:rgba(44,232,180,.14);
  border:1px solid rgba(44,232,180,.3);
  line-height:1.7;
}
.badge-accent{
  color:var(--c-accent);
  background:rgba(255,62,127,.1);
  border-color:rgba(255,62,127,.4);
}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:32px;
}
.section-head h2{
  font-size:24px;
  font-weight:700;
  line-height:1.25;
  margin-top:12px;
}
@media(min-width:768px){.section-head h2{font-size:32px;}}
@media(min-width:1024px){.section-head h2{font-size:34px;}}
.section-head .side-note{font-size:14px;color:var(--t-2);max-width:420px;line-height:1.7;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:48px 0 56px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
@media(min-width:1024px){.hero{padding:72px 0 88px;}}
.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
  align-items:center;
}
@media(min-width:1024px){
  .hero-grid{grid-template-columns:7fr 5fr;gap:48px;min-height:560px;}
}
.hero h1{
  font-size:30px;
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  margin:18px 0 0;
}
@media(min-width:768px){.hero h1{font-size:40px;}}
@media(min-width:1024px){.hero h1{font-size:50px;}}
.hero h1 .hl{
  color:var(--c-primary);
  text-shadow:0 0 26px rgba(44,232,180,.35);
}
.hero-sub{
  margin-top:18px;
  font-size:17px;
  color:var(--t-2);
  max-width:520px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-metrics{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  margin-top:36px;
  border-top:1px solid var(--line);
  padding-top:24px;
}
.hero-metric{
  padding:0 22px;
  border-left:1px solid var(--line);
  flex:1 1 40%;
  min-width:120px;
}
.hero-metric:first-child{padding-left:0;border-left:none;}
.hero-metric .num{
  display:block;
  font-family:var(--font-mono);
  font-size:26px;
  font-weight:700;
  color:var(--c-primary);
  line-height:1.2;
}
.hero-metric .lbl{font-size:13px;color:var(--t-3);}

.hero-visual{position:relative;}
.hero-shot{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:0 0 0 1px rgba(44,232,180,.18), 0 40px 70px -50px rgba(44,232,180,.7);
  aspect-ratio:16/10;
  background:var(--bg-2);
}
.hero-shot img{width:100%;height:100%;object-fit:cover;}
.hero-shot::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
}
.hero-float{
  position:absolute;
  right:-10px;
  bottom:-26px;
  width:46%;
  max-width:230px;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line-strong);
  background:var(--bg-2);
  box-shadow:0 24px 50px -26px rgba(0,0,0,.95);
}
.hero-float img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-float .cap{
  padding:8px 12px;
  font-size:12px;
  color:var(--t-2);
  border-top:1px solid var(--line);
}

/* ---------- Feature block ---------- */
.feature-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
@media(min-width:1024px){
  .feature-layout{grid-template-columns:4fr 8fr;gap:48px;}
}
.feature-aside{
  align-self:start;
}
@media(min-width:1024px){
  .feature-aside{position:sticky;top:96px;}
}
.feature-aside h2{font-size:24px;font-weight:700;margin-top:12px;}
@media(min-width:768px){.feature-aside h2{font-size:30px;}}
.feature-aside p{margin-top:14px;color:var(--t-2);font-size:15px;}
.feature-aside .link-arrow{margin-top:18px;}

.feature-list{
  display:grid;
  grid-template-columns:1fr;
  gap:0;
}
@media(min-width:900px){.feature-list{grid-template-columns:1fr 1fr;column-gap:32px;}}
.feature-row{
  position:relative;
  display:block;
  padding:20px 8px 20px 0;
  border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease), padding-left .2s var(--ease);
}
.feature-row::before{
  content:"";
  position:absolute;
  left:-14px;
  top:22px;
  bottom:22px;
  width:3px;
  border-radius:3px;
  background:var(--c-primary);
  opacity:0;
  transition:opacity .2s var(--ease);
}
.feature-row:hover{padding-left:10px;background:rgba(255,255,255,.02);}
.feature-row:hover::before{opacity:1;}
.feature-row:hover .feature-title{color:var(--c-primary);}
.feature-row:hover .arw{transform:translateX(4px);}
.feature-row-head{display:flex;align-items:baseline;gap:12px;}
.feature-no{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--t-3);
  letter-spacing:.04em;
}
.feature-title{
  font-size:18px;
  font-weight:600;
  color:var(--t-1);
  transition:color .2s var(--ease);
}
.feature-desc{
  margin-top:6px;
  font-size:14px;
  color:var(--t-2);
  line-height:1.7;
  padding-left:32px;
}
.feature-arrow{
  position:absolute;
  right:0;
  bottom:22px;
  color:var(--t-3);
  transition:transform .2s var(--ease), color .2s var(--ease);
}
.feature-row:hover .feature-arrow{color:var(--c-primary);}

/* ---------- Scenes ---------- */
.scene-tabs{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:28px;
}
.scene-tab{
  font-size:14px;
  padding:8px 18px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  color:var(--t-2);
  transition:all .2s var(--ease);
}
.scene-tab:hover{border-color:var(--c-primary);color:var(--t-1);}
.scene-tab.active{
  background:var(--c-primary);
  color:var(--bg-0);
  border-color:var(--c-primary);
  font-weight:600;
}
.scene-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:center;
}
@media(min-width:900px){.scene-grid{grid-template-columns:6fr 6fr;gap:48px;}}
.scene-figure{
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
  box-shadow:var(--shadow-card);
}
.scene-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .3s var(--ease);}
.scene-figure:hover img{transform:scale(1.03);}
.scene-body h3{font-size:22px;font-weight:600;line-height:1.4;}
.scene-body p{margin-top:12px;color:var(--t-2);font-size:15px;}
.point-list{margin-top:20px;display:grid;gap:12px;}
.point-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--t-2);
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:8px;
  height:8px;
  background:var(--c-primary);
  transform:rotate(45deg);
  border-radius:2px;
}
.scene-body .link-arrow{margin-top:24px;}

/* ---------- Cases ---------- */
.case-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media(min-width:900px){.case-grid{grid-template-columns:7fr 5fr;grid-template-rows:auto auto;gap:24px;}}
.case-card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px;
  box-shadow:var(--shadow-card);
  transition:box-shadow .2s var(--ease), transform .2s var(--ease), border-color .2s var(--ease);
  display:flex;
  flex-direction:column;
}
.case-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:transparent;
}
.case-card.span-tall{grid-row:span 2;}
.case-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
}
.case-top time{font-size:13px;color:var(--t-3);}
.case-card h3{font-size:20px;font-weight:600;line-height:1.45;}
.case-card p{margin-top:10px;font-size:14px;color:var(--t-2);}
.case-stats{
  display:flex;
  flex-wrap:wrap;
  gap:24px;
  margin-top:auto;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.case-stat .num{
  display:block;
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  color:var(--c-primary);
  line-height:1.3;
}
.case-stat .num.warm{color:var(--c-warn);}
.case-stat .lbl{font-size:12px;color:var(--t-3);}

/* ---------- Pricing ---------- */
.billing-toggle{
  display:inline-flex;
  gap:6px;
  padding:5px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--bg-1);
  margin-bottom:36px;
}
.billing-toggle span{
  font-size:13px;
  padding:7px 16px;
  border-radius:var(--radius-pill);
  color:var(--t-2);
}
.billing-toggle span.on{background:rgba(44,232,180,.14);color:var(--c-primary);border:1px solid rgba(44,232,180,.35);}
.price-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
  align-items:stretch;
}
@media(min-width:900px){.price-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.price-card{
  position:relative;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 24px;
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
  transition:box-shadow .2s var(--ease), transform .2s var(--ease), border-color .2s var(--ease);
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent;}
.price-card.featured{
  border-color:rgba(44,232,180,.5);
  box-shadow:0 0 0 1px rgba(44,232,180,.35), 0 30px 60px -40px rgba(44,232,180,.7);
}
@media(min-width:900px){.price-card.featured{transform:translateY(-12px);}}
@media(min-width:900px){.price-card.featured:hover{transform:translateY(-16px);}}
.price-card .reco{
  position:absolute;
  top:16px;
  right:16px;
}
.price-card .tier{font-size:14px;letter-spacing:.1em;color:var(--c-primary);}
.price-card h3{font-size:21px;font-weight:700;margin-top:10px;}
.price-card .fit{margin-top:8px;font-size:14px;color:var(--t-2);min-height:44px;}
.price-num{
  display:flex;
  align-items:baseline;
  gap:6px;
  margin-top:22px;
  padding-top:20px;
  border-top:1px solid var(--line);
}
.price-num .v{
  font-family:var(--font-mono);
  font-size:38px;
  font-weight:700;
  color:var(--t-1);
  line-height:1;
}
.price-num .u{font-size:13px;color:var(--t-3);}
.feat-list{margin-top:22px;display:grid;gap:10px;}
.feat-list li{
  position:relative;
  padding-left:24px;
  font-size:14px;
  color:var(--t-2);
}
.feat-list li::before{
  content:"✓";
  position:absolute;
  left:0;
  top:0;
  color:var(--c-primary);
  font-size:13px;
  font-weight:700;
}
.price-card .btn{margin-top:26px;}
.price-note{margin-top:20px;font-size:13px;color:var(--t-3);}

/* ---------- CMS / content list ---------- */
.content-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
}
@media(min-width:1024px){.content-layout{grid-template-columns:6fr 6fr;gap:32px;}}
.post-feature{
  display:block;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:box-shadow .2s var(--ease), transform .2s var(--ease), border-color .2s var(--ease);
}
.post-feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent;}
.post-feature .thumb{overflow:hidden;border-bottom:1px solid var(--line);}
.post-feature .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s var(--ease);}
.post-feature:hover .thumb img{transform:scale(1.03);}
.post-feature .body{padding:22px 24px 26px;}
.post-feature h3{font-size:21px;font-weight:600;line-height:1.45;margin-top:12px;}
.post-feature:hover h3{color:var(--c-primary);}
.post-feature p{margin-top:10px;font-size:14px;color:var(--t-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-feature .meta{margin-top:16px;display:flex;align-items:center;gap:14px;font-size:13px;color:var(--t-3);}

.post-list{display:flex;flex-direction:column;}
.post-item{
  display:block;
  padding:18px 12px 18px 0;
  border-bottom:1px solid var(--line);
  border-left:3px solid transparent;
  transition:background-color .2s var(--ease), border-left-color .2s var(--ease), padding-left .2s var(--ease);
}
.post-item:hover{
  background:rgba(255,255,255,.02);
  border-left-color:var(--c-primary);
  padding-left:12px;
}
.post-item h3{font-size:17px;font-weight:600;line-height:1.5;}
.post-item:hover h3{color:var(--c-primary);}
.post-item p{
  margin-top:6px;
  font-size:13px;
  color:var(--t-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-item .meta{
  margin-top:10px;
  display:flex;
  align-items:center;
  gap:12px;
  font-size:12px;
  color:var(--t-3);
}
.empty-state{
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-card);
  padding:44px 24px;
  text-align:center;
  background:var(--bg-2);
}
.empty-state .ico{
  width:46px;height:46px;
  margin:0 auto 14px;
  border-radius:50%;
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
  color:var(--t-3);
}
.empty-state p{font-size:15px;color:var(--t-2);}
.empty-state .link-arrow{margin-top:12px;}
.content-foot{margin-top:28px;}

/* ---------- FAQ ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:0 32px;
}
@media(min-width:900px){.faq-grid{grid-template-columns:1fr 1fr;}}
.faq-item{
  border-bottom:1px solid var(--line);
}
.faq-item summary{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  padding:20px 4px;
  font-size:17px;
  font-weight:600;
  color:var(--t-1);
  cursor:pointer;
  list-style:none;
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-primary);}
.faq-item summary .plus{
  flex-shrink:0;
  width:20px;
  height:20px;
  position:relative;
  margin-top:5px;
  transition:transform .22s var(--ease);
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";
  position:absolute;
  background:var(--c-primary);
  border-radius:2px;
}
.faq-item summary .plus::before{left:0;right:0;top:9px;height:2px;}
.faq-item summary .plus::after{top:0;bottom:0;left:9px;width:2px;}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-body{
  padding:0 16px 20px 20px;
  border-left:2px solid var(--c-primary);
  margin-left:4px;
  background:rgba(255,255,255,.015);
  border-radius:0 10px 10px 0;
}
.faq-body p{font-size:15px;color:var(--t-2);}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  background:var(--bg-1);
  border:1px solid rgba(44,232,180,.35);
  border-radius:var(--radius-card);
  padding:32px 24px;
  overflow:hidden;
}
@media(min-width:900px){.cta-band{padding:44px 40px;}}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:10px 10px;
  opacity:.5;
  pointer-events:none;
}
.cta-inner{
  position:relative;
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
  align-items:center;
}
@media(min-width:900px){.cta-inner{grid-template-columns:6fr 6fr;gap:40px;}}
.cta-inner h2{font-size:24px;font-weight:700;line-height:1.3;}
@media(min-width:768px){.cta-inner h2{font-size:30px;}}
.cta-inner p{margin-top:12px;font-size:15px;color:var(--t-2);}
.cta-form{display:flex;flex-wrap:wrap;gap:12px;}
.cta-form input{
  flex:1 1 220px;
  min-width:0;
  background:var(--bg-3);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-btn);
  padding:13px 16px;
  color:var(--t-1);
  font-size:15px;
  transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.cta-form input::placeholder{color:var(--t-3);}
.cta-form input:focus{
  outline:none;
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(44,232,180,.18);
}
.cta-note{margin-top:14px;font-size:12px;color:var(--t-3);}
@media(max-width:640px){.cta-form .btn{width:100%;}}

/* ---------- Footer ---------- */
.site-footer{
  position:relative;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  margin-top:0;
  z-index:1;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg, transparent, var(--c-primary), var(--c-secondary), transparent);
  opacity:.6;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  padding:52px 0 32px;
}
@media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media(min-width:1024px){.footer-grid{grid-template-columns:4fr 2.5fr 3fr 2.5fr;gap:40px;}}
.footer-brand .logo-mark{font-size:18px;}
.footer-brand p{margin-top:14px;font-size:14px;color:var(--t-2);max-width:320px;}
.socials{display:flex;gap:10px;margin-top:18px;}
.socials a{
  width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-btn);
  font-size:13px;
  color:var(--t-2);
}
.socials a:hover{border-color:var(--c-primary);color:var(--c-primary);}
.footer-col h4{font-size:14px;font-weight:600;color:var(--t-1);letter-spacing:.06em;}
.footer-col ul{margin-top:16px;display:grid;gap:10px;}
.footer-col a{
  font-size:14px;
  color:var(--t-2);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.footer-col a::after{
  content:"→";
  font-size:12px;
  opacity:0;
  transform:translateX(-3px);
  transition:opacity .2s var(--ease), transform .2s var(--ease);
}
.footer-col a:hover{color:var(--c-primary);}
.footer-col a:hover::after{opacity:1;transform:translateX(4px);}
.footer-col p{font-size:14px;color:var(--t-2);margin-top:16px;}
.footer-col p span{font-family:var(--font-mono);color:var(--t-1);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 28px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  font-size:12.5px;
  color:var(--t-3);
}
.footer-bottom a{color:var(--t-3);}
.footer-bottom a:hover{color:var(--c-primary);}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    transition-duration:.001ms !important;
    animation-duration:.001ms !important;
  }
  .case-card:hover,.price-card:hover,.post-feature:hover,.feature-row:hover{transform:none !important;}
  .scene-figure:hover img,.post-feature:hover .thumb img{transform:none !important;}
}

/* roulang page: article */
:root{
  --bg-0:#090A0F;
  --bg-1:#0F1118;
  --bg-2:#151823;
  --bg-3:#1C2030;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --c-primary:#2CE8B4;
  --c-primary-dim:#1BA98A;
  --c-secondary:#7C5CFF;
  --c-accent:#FF3E7F;
  --c-warn:#FFC24D;
  --t-1:#EEF2F8;
  --t-2:#A7B0C0;
  --t-3:#6C7486;
  --radius-card:18px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.04), 0 20px 40px -32px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px var(--c-primary), 0 18px 46px -22px rgba(44,232,180,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t-1);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.005em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:24px 24px;
}
body::after{
  content:"";
  position:fixed;
  top:-260px;right:-220px;
  width:720px;height:720px;
  pointer-events:none;
  z-index:0;
  background:radial-gradient(circle at center, rgba(44,232,180,.16), rgba(124,92,255,.10) 42%, transparent 68%);
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);}
a:hover{color:var(--c-primary);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:700;}
p{margin:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
  position:relative;
  z-index:2;
}
@media (min-width:1536px){ .container{max-width:1280px;} }
@media (max-width:1023px){ .container{padding:0 32px;} }
@media (max-width:639px){ .container{padding:0 20px;} }

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(15,17,24,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg, transparent, var(--c-primary) 45%, var(--c-secondary) 60%, transparent);
  opacity:.55;
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  gap:28px;
}
.logo{display:flex;align-items:center;gap:8px;flex-shrink:0;}
.logo-mark{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--t-1);
}
.logo-badge{
  font-size:11px;
  letter-spacing:.14em;
  padding:2px 8px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(44,232,180,.6);
  color:var(--c-primary);
  line-height:1.5;
}
.logo:hover .logo-mark{color:var(--c-primary);}
.nav-desktop{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 12px;
  font-size:14.5px;
  color:var(--t-2);
  border-radius:8px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
  box-shadow:0 0 12px rgba(44,232,180,.6);
}
.nav-link:hover{color:var(--t-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{
  color:var(--t-1);
  text-shadow:0 0 12px rgba(44,232,180,.45);
}
.nav-link.active::after{transform:scaleX(1);}
.nav-more{position:relative;}
.caret{font-size:11px;color:var(--t-3);}
.nav-dropdown{
  position:absolute;
  top:calc(100% + 12px);
  left:0;
  min-width:210px;
  padding:8px;
  background:var(--bg-2);
  border:1px solid var(--line-strong);
  border-radius:14px;
  box-shadow:0 24px 48px -26px rgba(0,0,0,.95);
  opacity:0;
  visibility:hidden;
  transform:translateY(-6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.nav-more:hover .nav-dropdown,
.nav-more.open .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0);}
.nav-dropdown a{
  display:block;
  padding:10px 12px 10px 14px;
  font-size:14px;
  color:var(--t-2);
  border-radius:8px;
  border-left:2px solid transparent;
}
.nav-dropdown a:hover{
  background:rgba(255,255,255,.045);
  color:var(--t-1);
  border-left-color:var(--c-primary);
}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.burger{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid var(--line-strong);
}
.burger span{display:block;height:2px;width:18px;margin:0 auto;background:var(--t-1);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease);}
.burger.open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger.open span:nth-child(2){opacity:0;}
.burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.mobile-drawer{
  display:none;
  position:fixed;
  inset:60px 0 0 0;
  z-index:55;
  background:var(--bg-0);
  padding:20px;
  overflow-y:auto;
  border-top:1px solid rgba(44,232,180,.4);
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:flex;
  align-items:center;
  height:48px;
  font-size:15.5px;
  color:var(--t-2);
  border-bottom:1px solid var(--line);
  padding-left:0;
  border-left:3px solid transparent;
}
.mobile-drawer a.active,
.mobile-drawer a:hover{color:var(--t-1);border-left-color:var(--c-primary);padding-left:12px;}
.drawer-label{
  margin:18px 0 6px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--t-3);
}

@media (max-width:1023px){
  .nav-desktop{display:none;}
  .burger{display:flex;}
  .header-inner{height:60px;justify-content:space-between;}
  .header-actions .btn-primary{display:none;}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  transition:all .22s var(--ease);
  white-space:nowrap;
}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{
  background:var(--c-primary);
  color:#06120E;
  box-shadow:0 10px 30px -14px rgba(44,232,180,.7);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px var(--c-primary),0 16px 40px -16px rgba(44,232,180,.75);color:#06120E;}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--t-2);
}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--t-1);}
.btn-ghost:active{transform:translateY(1px);}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--c-primary);
  font-weight:600;
}
.text-link .arrow{transition:transform .2s var(--ease);}
.text-link:hover .arrow{transform:translateX(4px);}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  padding:24px 0 0;
  font-size:13px;
  color:var(--t-3);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb a{color:var(--t-3);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:rgba(255,255,255,.2);}
.breadcrumb .current{color:var(--t-3);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- Article head ---------- */
.article-head{padding:26px 0 34px;border-bottom:1px solid var(--line);}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  font-size:12.5px;
  letter-spacing:.06em;
  border-radius:var(--radius-pill);
  color:var(--c-primary);
  background:rgba(44,232,180,.14);
  border:1px solid rgba(44,232,180,.28);
}
.article-title{
  margin-top:18px;
  font-size:40px;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.18;
  max-width:22ch;
}
.article-meta{
  margin-top:20px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 22px;
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:13px;
  color:var(--t-3);
}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong);}
@media (max-width:767px){
  .article-title{font-size:27px;max-width:none;}
}

/* ---------- Layout ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:48px;
  padding:48px 0 8px;
}
@media (min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 236px;align-items:start;}
}
.article-main{max-width:820px;width:100%;margin:0 auto;}

/* ---------- Article body ---------- */
.article-body{
  font-size:17px;
  line-height:1.9;
  color:#DCE3EE;
  word-break:break-word;
}
.article-body > * + *{margin-top:18px;}
.article-body p{margin-top:18px;}
.article-body h2{
  position:relative;
  margin-top:44px;
  padding-left:16px;
  font-size:28px;
  font-weight:700;
  color:var(--t-1);
  letter-spacing:-.01em;
  line-height:1.3;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:3px;
  border-radius:3px;
  background:var(--c-primary);
}
.article-body h3{
  margin-top:34px;
  font-size:22px;
  font-weight:600;
  color:var(--t-1);
}
.article-body h4{
  margin-top:26px;
  font-size:18px;
  font-weight:600;
  color:var(--t-1);
}
.article-body ul,
.article-body ol{margin-top:16px;padding-left:2px;}
.article-body ul li,
.article-body ol li{
  position:relative;
  padding-left:22px;
  margin-top:10px;
  color:#D3DBE8;
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:7px;height:7px;
  background:var(--c-primary);
  border-radius:2px;
}
.article-body ol{counter-reset:num;}
.article-body ol li::before{
  counter-increment:num;
  content:counter(num,decimal-leading-zero);
  position:absolute;
  left:0;top:0;
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:13px;
  color:var(--c-primary);
}
.article-body blockquote{
  margin-top:26px;
  padding:18px 22px;
  background:var(--bg-2);
  border-left:4px solid var(--c-primary);
  border-radius:0 12px 12px 0;
  color:var(--t-2);
  font-style:normal;
}
.article-body a{color:var(--c-primary);border-bottom:1px solid rgba(44,232,180,.35);}
.article-body a:hover{border-bottom-color:var(--c-primary);}
.article-body img{
  margin-top:26px;
  border-radius:14px;
  border:1px solid var(--line);
}
.article-body figure{margin:26px 0 0;}
.article-body figcaption{
  margin-top:10px;
  font-size:13px;
  color:var(--t-3);
  text-align:center;
}
.article-body table{
  width:100%;
  margin-top:26px;
  border-collapse:collapse;
  font-size:15px;
  display:block;
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:12px;
}
.article-body thead th{
  background:var(--bg-2);
  color:var(--t-1);
  font-weight:600;
  text-align:left;
}
.article-body th,
.article-body td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.article-body tbody tr:nth-child(odd){background:rgba(255,255,255,.02);}
.article-body pre{
  margin-top:26px;
  padding:18px;
  background:var(--bg-3);
  border:1px solid var(--line);
  border-radius:12px;
  overflow-x:auto;
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:14px;
  line-height:1.7;
  color:#CFE7DE;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:14px;
  background:var(--bg-3);
  border:1px solid var(--line);
  border-radius:6px;
  padding:2px 6px;
  color:#A8F0DA;
}
.article-body pre code{background:none;border:0;padding:0;}
.article-body hr{
  margin:36px 0;
  border:0;
  border-top:1px solid var(--line);
}

/* ---------- TOC ---------- */
.toc{
  position:sticky;
  top:96px;
  padding:20px;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
}
.toc h4{
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--t-3);
  font-weight:600;
  margin-bottom:14px;
}
.toc a{
  display:block;
  font-size:14px;
  color:var(--t-2);
  padding:6px 0 6px 12px;
  border-left:2px solid transparent;
}
.toc a:hover,
.toc a.current{
  color:var(--c-primary);
  border-left-color:var(--c-primary);
}
@media (max-width:1279px){ .toc-aside{display:none;} }

/* ---------- Empty state ---------- */
.empty-state{
  text-align:center;
  padding:72px 24px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
}
.empty-state .icon{
  width:54px;height:54px;
  margin:0 auto 18px;
  border-radius:16px;
  border:1.5px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
  color:var(--t-3);
  font-size:22px;
}
.empty-state p{font-size:15px;color:var(--t-2);}
.empty-state .text-link{margin-top:16px;}

/* ---------- Tag row ---------- */
.tag-row{
  margin-top:44px;
  padding-top:28px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
}
.tag-row .label{font-size:13px;color:var(--t-3);letter-spacing:.08em;}
.tag{
  display:inline-flex;
  align-items:center;
  padding:6px 14px;
  font-size:13px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  color:var(--t-2);
  background:var(--bg-2);
}
.tag:hover{
  color:var(--c-primary);
  border-color:rgba(44,232,180,.5);
  background:rgba(44,232,180,.08);
}

/* ---------- Prev / Next ---------- */
.post-nav{
  margin-top:40px;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.post-nav a{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:22px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:all .22s var(--ease);
}
.post-nav a:hover{
  border-color:var(--c-primary);
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
}
.post-nav .dir{
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:12.5px;
  color:var(--c-primary);
  letter-spacing:.08em;
}
.post-nav .title{
  font-size:16px;
  font-weight:600;
  color:var(--t-1);
  line-height:1.6;
}
.post-nav .next{align-items:flex-end;text-align:right;}
@media (max-width:767px){
  .post-nav{grid-template-columns:1fr;}
  .post-nav .next{align-items:flex-start;text-align:left;}
}

/* ---------- Section ---------- */
.section{padding:88px 0;}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:36px;
}
.eyebrow{
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--c-primary);
  margin-bottom:12px;
  display:block;
}
.section-title{
  font-size:34px;
  font-weight:700;
  letter-spacing:-.015em;
  line-height:1.22;
}
.section-desc{font-size:15px;color:var(--t-2);max-width:52ch;}
@media (max-width:767px){
  .section{padding:60px 0;}
  .section-title{font-size:24px;}
}

/* ---------- Related cards ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
@media (max-width:1023px){ .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));} }
@media (max-width:639px){ .card-grid{grid-template-columns:1fr;} }
.card{
  display:flex;
  flex-direction:column;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-card);
  transition:all .22s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--c-primary);
  box-shadow:var(--shadow-hover);
}
.card h3{
  font-size:19px;
  font-weight:600;
  line-height:1.5;
  margin-top:14px;
}
.card:hover h3{color:var(--c-primary);}
.card p{
  margin-top:10px;
  font-size:14.5px;
  color:var(--t-2);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-foot{
  margin-top:auto;
  padding-top:18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:12.5px;
  color:var(--t-3);
}
.card-thumb{
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/9;
}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.card:hover .card-thumb img{transform:scale(1.03);}

/* ---------- Back link ---------- */
.back-line{
  margin-top:32px;
  display:flex;
  flex-wrap:wrap;
  gap:16px 28px;
  align-items:center;
}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  margin:0 0 96px;
  padding:56px;
  background:var(--bg-1);
  border:1px solid rgba(44,232,180,.32);
  border-radius:24px;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-140px;top:-120px;
  width:420px;height:420px;
  background:radial-gradient(circle,rgba(44,232,180,.18),transparent 66%);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1fr) 420px;
  gap:40px;
  align-items:center;
}
.cta-inner h2{font-size:32px;font-weight:800;letter-spacing:-.015em;}
.cta-inner p{margin-top:14px;font-size:15px;color:var(--t-2);max-width:44ch;}
.cta-form{display:flex;gap:12px;}
.cta-form input{
  flex:1;
  height:50px;
  padding:0 16px;
  font-size:15px;
  color:var(--t-1);
  background:var(--bg-3);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-btn);
  transition:all .2s var(--ease);
}
.cta-form input::placeholder{color:var(--t-3);}
.cta-form input:focus{
  outline:none;
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(44,232,180,.18);
}
.cta-note{margin-top:14px;font-size:12px;color:var(--t-3);}
@media (max-width:1023px){
  .cta-inner{grid-template-columns:1fr;}
  .cta-band{padding:36px 24px;border-radius:18px;}
  .cta-inner h2{font-size:24px;}
}
@media (max-width:639px){
  .cta-form{flex-direction:column;}
  .cta-form .btn{width:100%;}
}

/* ---------- Footer ---------- */
.site-footer{
  position:relative;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding-top:64px;
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--c-primary) 40%,var(--c-secondary) 65%,transparent);
  opacity:.6;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand p{
  margin-top:18px;
  font-size:14px;
  color:var(--t-2);
  line-height:1.8;
  max-width:34ch;
}
.socials{display:flex;gap:10px;margin-top:20px;}
.socials a{
  padding:6px 14px;
  font-size:13px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  color:var(--t-2);
}
.socials a:hover{color:var(--c-primary);border-color:rgba(44,232,180,.5);}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--t-1);
  margin-bottom:18px;
  letter-spacing:.04em;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a,
.footer-col p{
  font-size:14px;
  color:var(--t-2);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.footer-col a::after{
  content:"›";
  opacity:0;
  transform:translateX(-4px);
  transition:all .2s var(--ease);
  color:var(--c-primary);
}
.footer-col a:hover{color:var(--c-primary);}
.footer-col a:hover::after{opacity:1;transform:translateX(4px);}
.footer-col p span{
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  color:var(--t-1);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding:22px 40px 28px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--t-3);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .footer-bottom{padding:22px 32px 28px;}
}
@media (max-width:639px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{padding:22px 20px 28px;}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .card:hover,.post-nav a:hover{transform:none;}
}

/* roulang page: category1 */
:root{
  --bg-0:#090A0F; --bg-1:#0F1118; --bg-2:#151823; --bg-3:#1C2030;
  --line:rgba(255,255,255,.08); --line-strong:rgba(255,255,255,.16);
  --c-primary:#2CE8B4; --c-primary-dim:#1BA98A; --c-secondary:#7C5CFF;
  --c-accent:#FF3E7F; --c-warn:#FFC24D;
  --t-1:#EEF2F8; --t-2:#A7B0C0; --t-3:#6C7486;
  --radius-card:18px; --radius-btn:12px; --radius-pill:999px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Consolas,"Courier New",monospace;
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset,0 20px 40px -32px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px var(--c-primary),0 18px 46px -22px rgba(44,232,180,.45);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;background:var(--bg-0);color:var(--t-1);
  font-family:var(--font-sans);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:24px 24px;
}
body::after{
  content:"";position:fixed;top:-220px;right:-180px;width:720px;height:720px;pointer-events:none;z-index:0;
  background:radial-gradient(circle at center,rgba(44,232,180,.14),rgba(124,92,255,.10) 45%,transparent 70%);
  filter:blur(6px);
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.25}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease)}
img{display:block;max-width:100%;height:auto}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;
}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px;position:relative;z-index:1}
@media (max-width:1023px){.container{padding:0 32px}}
@media (max-width:639px){.container{padding:0 20px}}
@media (min-width:1536px){.container{max-width:1280px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);padding:13px 22px;font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;transition:all .22s var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:var(--bg-0);box-shadow:0 10px 30px -16px rgba(44,232,180,.75)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(44,232,180,.6),0 16px 36px -14px rgba(44,232,180,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--t-1)}
.btn-ghost:hover{border-color:var(--c-primary);color:#fff;background:rgba(44,232,180,.06)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:10px 16px;font-size:14px}
.btn-block{width:100%}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:600}
.link-arrow::after{content:"→";transition:transform .22s var(--ease)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(15,17,24,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,232,180,.75),rgba(124,92,255,.5),transparent);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:inline-flex;align-items:center;gap:8px;font-size:19px;font-weight:800;letter-spacing:.01em;flex-shrink:0}
.logo-mark{color:var(--t-1)}
.logo-badge{
  font-size:11px;letter-spacing:.12em;font-weight:600;color:var(--c-primary);
  border:1px solid rgba(44,232,180,.5);border-radius:var(--radius-pill);padding:2px 8px;line-height:1.5;
}
.nav-desktop{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;display:inline-block;padding:9px 13px;font-size:15px;color:var(--t-2);border-radius:8px;
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--t-1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--t-1);text-shadow:0 0 12px rgba(44,232,180,.45)}
.nav-link.active::after{transform:scaleX(1)}
.nav-more{position:relative}
.nav-more-btn{display:inline-flex;align-items:center;gap:5px}
.caret{font-size:11px;color:var(--t-3)}
.nav-dropdown{
  position:absolute;top:calc(100% + 10px);left:0;min-width:216px;padding:8px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:14px;
  box-shadow:0 24px 48px -26px rgba(0,0,0,.95);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:all .2s var(--ease);
}
.nav-more:hover .nav-dropdown,.nav-more:focus-within .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.nav-dropdown a{
  display:block;padding:9px 14px;font-size:14px;color:var(--t-2);
  border-left:2px solid transparent;border-radius:8px;
}
.nav-dropdown a:hover{background:var(--bg-3);color:var(--t-1);border-left-color:var(--c-primary)}
.header-actions{display:flex;align-items:center;gap:12px}
.burger{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);flex-direction:column;align-items:center;justify-content:center;gap:4px}
.burger span{display:block;width:18px;height:2px;background:var(--t-1);border-radius:2px;transition:all .2s var(--ease)}
.burger:hover{border-color:var(--c-primary)}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:var(--bg-0);padding:14px 20px 26px}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:flex;align-items:center;height:48px;font-size:15px;color:var(--t-2);border-bottom:1px solid var(--line)}
.mobile-drawer a.active{color:var(--c-primary);border-left:2px solid var(--c-primary);padding-left:10px}
.mobile-drawer a:hover{color:var(--t-1)}
.drawer-label{font-size:12px;letter-spacing:.12em;color:var(--t-3);padding:16px 0 6px}
@media (max-width:1023px){
  .nav-desktop{display:none}
  .burger{display:flex}
  .header-inner{height:60px}
}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-2);padding:22px 0 0}
.breadcrumb span{color:var(--t-3)}
.breadcrumb em{font-style:normal;color:var(--t-3)}

/* ---------- 分类页头 ---------- */
.cat-hero{position:relative;padding:0 0 76px;overflow:hidden;border-bottom:1px solid var(--line)}
.cat-hero-bg{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.28;
}
.cat-hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(9,10,15,.72) 0%,rgba(9,10,15,.88) 55%,var(--bg-0) 100%);
}
.cat-hero-inner{position:relative;z-index:2;padding-top:34px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.12em;
  color:var(--c-primary);border:1px solid rgba(44,232,180,.45);border-radius:var(--radius-pill);
  padding:5px 14px;background:rgba(44,232,180,.07);
}
.cat-hero h1{font-size:clamp(30px,4vw,46px);font-weight:800;letter-spacing:-.02em;line-height:1.14;margin:18px 0 0}
.cat-hero h1 .hl{
  background:linear-gradient(100deg,var(--c-primary),var(--c-secondary));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.cat-hero-lead{max-width:720px;margin-top:16px;font-size:16.5px;color:var(--t-2);line-height:1.85}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:0;margin-top:38px;border-top:1px solid var(--line);padding-top:22px}
.hero-metrics .metric{padding:0 26px;border-left:1px solid var(--line)}
.hero-metrics .metric:first-child{border-left:none;padding-left:0}
.metric-num{font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--c-primary);line-height:1.2}
.metric-label{font-size:13px;color:var(--t-3)}
@media (max-width:767px){
  .hero-metrics .metric{padding:0 18px}
  .hero-metrics .metric:nth-child(3){border-left:none;padding-left:0}
}

/* ---------- 区块通用 ---------- */
.section{padding:88px 0;border-top:1px solid var(--line);position:relative}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:38px}
.sec-label{display:block;font-size:12px;letter-spacing:.14em;color:var(--c-primary);margin-bottom:12px}
.section-head h2{font-size:32px;font-weight:700}
.section-note{font-size:14.5px;color:var(--t-2);max-width:400px;line-height:1.75}
@media (max-width:767px){
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:26px}
  .section-head h2{font-size:24px}
}

/* ---------- 目录 + 功能卡 ---------- */
.cat-layout{display:grid;grid-template-columns:262px minmax(0,1fr);gap:40px;align-items:start}
.toc{
  position:sticky;top:96px;background:var(--bg-1);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-card);
}
.toc-title{font-size:12px;letter-spacing:.14em;color:var(--t-3);margin-bottom:10px}
.toc a{
  display:block;padding:10px 12px;font-size:14px;color:var(--t-2);
  border-left:2px solid transparent;border-radius:9px;line-height:1.5;
}
.toc a:hover{background:var(--bg-2);color:var(--t-1);border-left-color:var(--c-primary)}
.toc-foot{margin-top:16px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--t-3)}
.func-group{margin-bottom:44px}
.func-group:last-of-type{margin-bottom:0}
.func-group-head{display:flex;align-items:baseline;gap:14px;margin-bottom:20px}
.func-group-head h3{font-size:21px;font-weight:600}
.func-group-head .group-desc{font-size:14px;color:var(--t-3)}
.func-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.func-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.func-card:hover{transform:translateY(-4px);border-color:transparent;box-shadow:var(--shadow-hover)}
.func-num{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.12em;color:var(--c-primary);
  display:inline-block;margin-bottom:12px;
}
.func-card h4{font-size:19px;font-weight:600;margin-bottom:8px}
.func-card p{font-size:14.5px;color:var(--t-2);line-height:1.8;margin-bottom:14px}
.ticks li{position:relative;padding-left:18px;font-size:14px;color:var(--t-2);line-height:1.9}
.ticks li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;
  background:var(--c-primary);border-radius:1px;transform:rotate(45deg);
}
@media (max-width:1023px){
  .cat-layout{grid-template-columns:1fr;gap:28px}
  .toc{position:static}
  .func-grid{grid-template-columns:1fr}
}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 22px;box-shadow:var(--shadow-card);position:relative;overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.step:hover{transform:translateY(-4px);border-color:transparent;box-shadow:var(--shadow-hover)}
.step-num{font-family:var(--font-mono);font-size:30px;font-weight:700;color:var(--c-secondary);line-height:1;margin-bottom:14px;display:block}
.step h3{font-size:18px;font-weight:600;margin-bottom:8px}
.step p{font-size:14px;color:var(--t-2);line-height:1.8}
@media (max-width:1023px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:639px){.steps{grid-template-columns:1fr}}

/* ---------- 场景图文 ---------- */
.scene-split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:48px;align-items:center}
.scene-media{
  position:relative;border-radius:14px;overflow:hidden;border:1px solid var(--line);
  box-shadow:0 24px 60px -40px rgba(44,232,180,.5);
}
.scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s var(--ease)}
.scene-media:hover img{transform:scale(1.03)}
.scene-text h3{font-size:24px;font-weight:700;margin-bottom:14px}
.scene-text>p{font-size:15.5px;color:var(--t-2);line-height:1.85;margin-bottom:18px}
.scene-text .ticks li{font-size:14.5px}
.scene-text .link-arrow{margin-top:22px}
@media (max-width:767px){
  .scene-split{grid-template-columns:1fr;gap:26px}
  .scene-text h3{font-size:20px}
}

/* ---------- 相关资讯 ---------- */
.news-list{border-top:1px solid var(--line)}
.news-item{
  display:grid;grid-template-columns:132px minmax(0,1fr) auto;gap:22px;align-items:center;
  padding:20px 16px;border-bottom:1px solid var(--line);position:relative;
  transition:background .22s var(--ease);
}
.news-item::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;
  background:var(--c-primary);transform:scaleY(0);transform-origin:center;transition:transform .22s var(--ease);
}
.news-item:hover{background:rgba(255,255,255,.025)}
.news-item:hover::before{transform:scaleY(1)}
.news-item:hover .news-title{color:var(--c-primary)}
.news-thumb{border-radius:12px;overflow:hidden;border:1px solid var(--line)}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease)}
.news-item:hover .news-thumb img{transform:scale(1.05)}
.news-title{font-size:17px;font-weight:600;transition:color .22s var(--ease)}
.news-ex{font-size:14px;color:var(--t-2);line-height:1.75;margin-top:6px}
.news-meta{font-size:12.5px;color:var(--t-3);font-family:var(--font-mono)}
@media (max-width:767px){
  .news-item{grid-template-columns:1fr;gap:12px}
  .news-thumb{max-width:220px}
}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 40px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;font-size:17px;font-weight:600;cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  flex-shrink:0;width:22px;height:22px;position:relative;border-radius:50%;
  border:1px solid var(--line-strong);transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--c-primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.5px}
.faq-icon::after{width:1.5px;height:10px}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:var(--c-primary)}
.faq-item[open] summary{color:var(--c-primary)}
.faq-body{
  padding:2px 4px 20px 16px;border-left:2px solid var(--c-primary);
  background:rgba(255,255,255,.02);font-size:14.5px;color:var(--t-2);line-height:1.85;border-radius:0 8px 8px 0;
}
@media (max-width:767px){.faq-grid{grid-template-columns:1fr}}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;background:var(--bg-1);border:1px solid rgba(44,232,180,.4);
  border-radius:24px;padding:48px;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.35;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);
  background-size:14px 14px;
}
.cta-grid{position:relative;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center}
.cta-grid h2{font-size:30px;font-weight:700;margin-bottom:12px}
.cta-grid p{font-size:15px;color:var(--t-2);line-height:1.85;max-width:480px}
.cta-form{display:flex;gap:12px}
.field{
  width:100%;background:var(--bg-3);border:1px solid var(--line-strong);border-radius:var(--radius-btn);
  padding:13px 16px;font-size:15px;color:var(--t-1);transition:all .22s var(--ease);
}
.field::placeholder{color:var(--t-3)}
.field:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(44,232,180,.18)}
.form-tip{margin-top:12px;font-size:12px;color:var(--t-3);line-height:1.7}
@media (max-width:900px){
  .cta-band{padding:32px 24px}
  .cta-grid{grid-template-columns:1fr;gap:26px}
  .cta-grid h2{font-size:24px}
}
@media (max-width:520px){
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-1);border-top:1px solid var(--line);position:relative;margin-top:96px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-primary),var(--c-secondary),transparent);opacity:.7;
}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;padding-top:64px;padding-bottom:42px}
.footer-brand p{font-size:14px;color:var(--t-2);line-height:1.85;margin-top:16px;max-width:320px}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{
  font-size:13px;color:var(--t-2);border:1px solid var(--line-strong);border-radius:var(--radius-pill);
  padding:5px 14px;
}
.socials a:hover{border-color:var(--c-primary);color:var(--c-primary)}
.footer-col h4{font-size:14px;font-weight:600;color:var(--t-1);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--t-2);display:inline-flex;align-items:center;gap:4px}
.footer-col a::after{content:"›";opacity:0;transform:translateX(-4px);transition:all .22s var(--ease)}
.footer-col a:hover{color:var(--c-primary)}
.footer-col a:hover::after{opacity:1;transform:translateX(2px)}
.footer-col p{font-size:14px;color:var(--t-2);margin-bottom:10px}
.footer-col p span{font-family:var(--font-mono);color:var(--t-3);font-size:13px}
.footer-bottom{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:22px;padding-bottom:26px;
  font-size:12.5px;color:var(--t-3);
}
@media (max-width:1023px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding-top:48px}}
@media (max-width:639px){.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:8px}}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .func-card:hover,.step:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --bg-0:#090A0F;
  --bg-1:#0F1118;
  --bg-2:#151823;
  --bg-3:#1C2030;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --c-primary:#2CE8B4;
  --c-primary-dim:#1BA98A;
  --c-secondary:#7C5CFF;
  --c-accent:#FF3E7F;
  --c-warn:#FFC24D;
  --t-1:#EEF2F8;
  --t-2:#A7B0C0;
  --t-3:#6C7486;
  --radius-card:18px;
  --radius-btn:12px;
  --radius-pill:999px;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background-color:var(--bg-0);
  color:var(--t-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 520px at 88% -8%, rgba(44,232,180,.14), transparent 70%),
    radial-gradient(720px 460px at 2% 6%, rgba(124,92,255,.13), transparent 72%),
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:auto,auto,24px 24px,24px 24px;
  background-attachment:fixed,fixed,fixed,fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),opacity .2s var(--ease);}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:none;padding:0;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;}
::selection{background:rgba(44,232,180,.3);color:#fff;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:6px;}

/* ================= 容器 ================= */
.container{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:768px){.container{padding-left:32px;padding-right:32px;}}
@media (min-width:1024px){.container{padding-left:40px;padding-right:40px;}}
@media (min-width:1536px){.container{max-width:1280px;}}

/* ================= 顶部导航 ================= */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(15,17,24,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,232,180,.85),rgba(124,92,255,.7),transparent);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:68px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  flex-shrink:0;
}
.logo-mark{
  font-size:18px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--t-1);
  white-space:nowrap;
}
.logo-badge{
  font-size:11px;
  letter-spacing:.12em;
  line-height:1;
  padding:4px 8px;
  border:1px solid rgba(44,232,180,.6);
  border-radius:var(--radius-pill);
  color:var(--c-primary);
  white-space:nowrap;
}
.logo:hover .logo-mark{color:var(--c-primary);}

.nav-desktop{
  display:flex;
  align-items:center;
  gap:2px;
  flex:1;
  justify-content:center;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:9px 12px;
  font-size:14px;
  color:var(--t-2);
  border-radius:8px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--c-primary);
  box-shadow:0 0 12px rgba(44,232,180,.6);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
  border-radius:2px;
}
.nav-link:hover{color:var(--t-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--t-1);text-shadow:0 0 12px rgba(44,232,180,.45);}
.nav-link.active::after{transform:scaleX(1);}
.caret{font-size:10px;color:var(--t-3);}
.nav-more{position:relative;}
.nav-more-btn{font-family:inherit;}
.nav-dropdown{
  position:absolute;
  top:calc(100% + 10px);
  left:0;
  min-width:210px;
  padding:8px;
  background:var(--bg-2);
  border:1px solid var(--line-strong);
  border-radius:14px;
  box-shadow:0 24px 50px -28px rgba(0,0,0,.95);
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  z-index:30;
}
.nav-more:hover .nav-dropdown,
.nav-more:focus-within .nav-dropdown,
.nav-more.open .nav-dropdown{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.nav-dropdown a{
  display:block;
  padding:9px 12px;
  font-size:14px;
  color:var(--t-2);
  border-left:2px solid transparent;
  border-radius:8px;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-dropdown a:hover{
  background:rgba(255,255,255,.05);
  border-left-color:var(--c-primary);
  color:var(--t-1);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}

/* ================= 按钮 ================= */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.01em;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .12s var(--ease),filter .2s var(--ease);
}
.btn-primary{
  background:var(--c-primary);
  color:#06110D;
  box-shadow:0 12px 30px -18px rgba(44,232,180,.8);
}
.btn-primary:hover{
  filter:brightness(1.08);
  box-shadow:0 0 0 1px var(--c-primary),0 16px 38px -18px rgba(44,232,180,.6);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--t-1);
}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:9px 16px;font-size:13px;}
.btn-text{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--c-primary);
  font-weight:600;
}
.btn-text .arrow{transition:transform .2s var(--ease);}
.btn-text:hover .arrow{transform:translateX(4px);}

/* 汉堡 */
.burger{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:40px;
  height:40px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  align-items:center;
}
.burger span{
  display:block;
  width:16px;
  height:1.5px;
  background:var(--t-1);
  border-radius:2px;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

.mobile-drawer{display:none;}

/* ================= 面包屑 ================= */
.crumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  padding:26px 0 18px;
  font-size:13px;
  color:var(--t-3);
}
.crumb a{color:var(--t-2);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:var(--line-strong);}
.crumb .current{color:var(--t-3);}

/* ================= Hero ================= */
.hero-wrap{padding-bottom:0;}
.cat-hero{
  position:relative;
  display:flex;
  align-items:flex-end;
  min-height:400px;
  aspect-ratio:21 / 9;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  overflow:hidden;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  box-shadow:0 30px 60px -46px rgba(44,232,180,.55);
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:24px 24px;
  z-index:1;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(9,10,15,.28) 0%,rgba(9,10,15,.68) 52%,rgba(9,10,15,.95) 100%);
  z-index:1;
}
.cat-hero-inner{
  position:relative;
  z-index:2;
  padding:48px;
  max-width:780px;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--c-primary);
  border:1px solid rgba(44,232,180,.45);
  border-radius:var(--radius-pill);
  background:rgba(44,232,180,.08);
  margin-bottom:20px;
}
.cat-hero h1{
  font-size:clamp(30px,4.6vw,52px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
  margin-bottom:16px;
}
.hero-sub{
  font-size:17px;
  color:var(--t-2);
  line-height:1.8;
  max-width:620px;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  margin-top:26px;
  font-size:13px;
  color:var(--t-2);
}
.hero-meta span{
  padding:0 18px;
  border-left:1px solid var(--line-strong);
  font-family:var(--font-mono);
  letter-spacing:.02em;
}
.hero-meta span:first-child{padding-left:0;border-left:none;}

/* ================= 区块 ================= */
.section{padding:88px 0 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:28px;
  margin-bottom:36px;
}
.section-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--c-primary);
  margin-bottom:12px;
}
.section-label::before{
  content:"";
  width:18px;
  height:1px;
  background:var(--c-primary);
  box-shadow:0 0 10px rgba(44,232,180,.8);
}
.section-title{
  font-size:clamp(24px,2.6vw,34px);
  font-weight:700;
  letter-spacing:-.015em;
}
.section-note{
  font-size:14px;
  color:var(--t-2);
  max-width:360px;
  line-height:1.8;
}

/* ================= 场景速查列表 ================= */
.quick-list{border-top:1px solid var(--line);}
.quick-item{
  position:relative;
  display:grid;
  grid-template-columns:64px 1.1fr 1.5fr 140px;
  align-items:center;
  gap:20px;
  padding:22px 16px 22px 20px;
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease);
}
.quick-item::before{
  content:"";
  position:absolute;
  left:0;top:12%;
  width:3px;height:76%;
  background:var(--c-primary);
  border-radius:3px;
  opacity:0;
  transition:opacity .22s var(--ease);
}
.quick-item:hover{background:rgba(255,255,255,.035);}
.quick-item:hover::before{opacity:1;}
.quick-idx{
  font-family:var(--font-mono);
  font-size:15px;
  color:var(--t-3);
  letter-spacing:.06em;
}
.quick-item:hover .quick-idx{color:var(--c-primary);}
.quick-title{font-size:17px;font-weight:600;}
.quick-desc{font-size:14px;color:var(--t-2);line-height:1.75;}
.quick-time{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--c-warn);
  text-align:right;
  letter-spacing:.02em;
}

/* ================= 交替图文 ================= */
.split-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  padding:56px 0;
  border-bottom:1px solid var(--line);
}
.split-row:last-child{border-bottom:none;}
.split-row.reverse .split-media{order:2;}
.split-media{
  overflow:hidden;
  border-radius:14px;
  border:1px solid var(--line);
  box-shadow:0 24px 50px -40px rgba(0,0,0,.95);
}
.split-media img{
  width:100%;
  aspect-ratio:4 / 3;
  object-fit:cover;
  border-radius:14px;
  transition:transform .3s var(--ease);
}
.split-media:hover img{transform:scale(1.03);}
.split-kicker{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--c-secondary);
  margin-bottom:12px;
  display:block;
}
.split-body h2{
  font-size:clamp(22px,2.2vw,28px);
  font-weight:700;
  margin-bottom:14px;
  letter-spacing:-.015em;
}
.split-body p.lead{
  font-size:16px;
  color:var(--t-2);
  line-height:1.85;
  margin-bottom:20px;
}
.points{display:grid;gap:12px;list-style:none;}
.points li{
  position:relative;
  padding-left:24px;
  font-size:15px;
  color:var(--t-2);
  line-height:1.75;
}
.points li::before{
  content:"";
  position:absolute;
  left:3px;
  top:.62em;
  width:8px;
  height:8px;
  background:var(--c-primary);
  transform:rotate(45deg);
  border-radius:2px;
  box-shadow:0 0 12px rgba(44,232,180,.55);
}
.split-body .btn-text{margin-top:22px;}

/* ================= 场景标签 ================= */
.tag-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px;}
.tag-pill{
  padding:8px 18px;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--t-2);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  transition:all .2s var(--ease);
}
.tag-pill:hover{color:var(--t-1);border-color:var(--c-primary);}
.tag-pill.active{
  background:var(--c-primary);
  border-color:var(--c-primary);
  color:#06110D;
  font-weight:600;
  box-shadow:0 12px 28px -18px rgba(44,232,180,.9);
}

/* ================= 每日节奏时间线 ================= */
.timeline{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.tl-item{
  padding:30px 24px 30px 0;
  border-right:1px solid var(--line);
}
.tl-item:last-child{border-right:none;padding-right:0;}
.tl-time{
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--c-primary);
  letter-spacing:.04em;
}
.tl-title{font-size:17px;font-weight:600;margin-top:10px;}
.tl-text{font-size:14px;color:var(--t-2);line-height:1.75;margin-top:8px;}

/* ================= FAQ ================= */
.faq-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0 44px;
  align-items:start;
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  position:relative;
  list-style:none;
  cursor:pointer;
  padding:18px 34px 18px 0;
  font-size:17px;
  font-weight:600;
  color:var(--t-1);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  position:absolute;
  right:2px;
  top:15px;
  font-size:20px;
  line-height:1;
  color:var(--c-primary);
  transition:transform .22s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item summary:hover{color:var(--c-primary);}
.faq-body{
  margin:0 0 20px 2px;
  padding-left:16px;
  border-left:2px solid var(--c-primary);
  font-size:15px;
  color:var(--t-2);
  line-height:1.85;
}

/* ================= CTA ================= */
.cta-band{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:44px;
  align-items:center;
  padding:48px;
  background:var(--bg-1);
  border:1px solid rgba(44,232,180,.36);
  border-radius:var(--radius-card);
  box-shadow:0 30px 60px -50px rgba(44,232,180,.7);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:4px 4px;
  opacity:.7;
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:700;
  margin-bottom:12px;
}
.cta-band p{font-size:15px;color:var(--t-2);line-height:1.8;}
.cta-form{display:flex;gap:12px;align-items:stretch;flex-wrap:wrap;}
.field{flex:1 1 220px;min-width:0;}
.field input{
  width:100%;
  padding:14px 16px;
  font-size:15px;
  color:var(--t-1);
  background:var(--bg-3);
  border:1px solid var(--line-strong);
  border-radius:12px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder{color:var(--t-3);}
.field input:focus{
  outline:none;
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(44,232,180,.18);
}
.cta-form .btn{flex:0 0 auto;}
.hint{
  margin-top:14px;
  font-size:12px;
  color:var(--t-3);
  line-height:1.7;
}
.form-msg{
  margin-top:12px;
  font-size:13px;
  color:var(--c-primary);
  min-height:18px;
}

/* ================= 相关资讯 ================= */
.news-list{border-top:1px solid var(--line);}
.news-item{
  position:relative;
  display:grid;
  grid-template-columns:150px 1fr auto;
  align-items:center;
  gap:24px;
  padding:20px 16px 20px 20px;
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease);
}
.news-item::before{
  content:"";
  position:absolute;
  left:0;top:14%;
  width:3px;height:72%;
  background:var(--c-primary);
  border-radius:3px;
  opacity:0;
  transition:opacity .22s var(--ease);
}
.news-item:hover{background:rgba(255,255,255,.035);}
.news-item:hover::before{opacity:1;}
.news-item:hover .news-title{color:var(--c-primary);}
.news-date{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--t-3);
}
.news-title{font-size:16px;font-weight:600;transition:color .2s var(--ease);}
.news-sum{font-size:14px;color:var(--t-2);margin-top:6px;line-height:1.7;}
.news-badge{
  font-size:12px;
  letter-spacing:.08em;
  color:var(--c-primary);
  background:rgba(44,232,180,.14);
  border-radius:var(--radius-pill);
  padding:4px 12px;
  white-space:nowrap;
}

/* ================= 页脚 ================= */
.site-footer{
  position:relative;
  margin-top:104px;
  background:var(--bg-1);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,232,180,.9),rgba(124,92,255,.75),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding:60px 0 40px;
}
.footer-brand p{
  font-size:14px;
  color:var(--t-2);
  line-height:1.85;
  margin-top:16px;
  max-width:340px;
}
.socials{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap;}
.socials a{
  font-size:13px;
  padding:6px 14px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  color:var(--t-2);
}
.socials a:hover{border-color:var(--c-primary);color:var(--c-primary);}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:var(--t-1);
  margin-bottom:16px;
}
.footer-col ul{list-style:none;}
.footer-col li{margin-bottom:10px;}
.footer-col a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--t-2);
}
.footer-col a::after{
  content:"→";
  opacity:0;
  transform:translateX(-4px);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
  font-size:12px;
}
.footer-col a:hover{color:var(--c-primary);}
.footer-col a:hover::after{opacity:1;transform:translateX(4px);}
.footer-col p{font-size:14px;color:var(--t-2);margin-bottom:10px;}
.footer-col p span{font-family:var(--font-mono);color:var(--t-1);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 34px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--t-3);
}

/* ================= 响应式 ================= */
@media (max-width:1279px){
  .quick-item{grid-template-columns:56px 1fr 1.4fr 120px;gap:16px;}
}
@media (max-width:1023px){
  .nav-desktop{display:none;}
  .burger{display:flex;}
  .header-inner{height:60px;}
  .mobile-drawer.open{
    display:flex;
    flex-direction:column;
    position:fixed;
    top:60px;left:0;right:0;bottom:0;
    z-index:110;
    background:var(--bg-0);
    border-top:1px solid rgba(44,232,180,.45);
    padding:12px 20px 40px;
    overflow-y:auto;
  }
  .mobile-drawer a{
    display:flex;
    align-items:center;
    height:48px;
    font-size:16px;
    color:var(--t-2);
    border-bottom:1px solid var(--line);
    padding-left:12px;
    border-left:2px solid transparent;
  }
  .mobile-drawer a.active{
    color:var(--c-primary);
    border-left-color:var(--c-primary);
    font-weight:600;
  }
  .drawer-label{
    font-size:12px;
    letter-spacing:.16em;
    color:var(--t-3);
    padding:20px 0 8px 12px;
  }
  .section{padding-top:72px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .split-row{gap:36px;padding:44px 0;}
  .cta-band{grid-template-columns:1fr;gap:30px;padding:40px;}
  .faq-grid{grid-template-columns:1fr;gap:0;}
  .timeline{grid-template-columns:1fr 1fr;}
  .tl-item{padding:24px 20px 24px 0;}
  .tl-item:nth-child(2n){border-right:none;}
  .tl-item:nth-child(n+3){border-top:1px solid var(--line);}
}
@media (max-width:767px){
  .section{padding-top:56px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:28px;}
  .split-row{grid-template-columns:1fr;}
  .split-row.reverse .split-media{order:0;}
  .quick-item{grid-template-columns:48px 1fr;gap:8px 14px;padding:18px 8px 18px 16px;}
  .quick-desc{grid-column:2;}
  .quick-time{grid-column:2;text-align:left;}
  .news-item{grid-template-columns:1fr;gap:8px;padding:18px 8px 18px 16px;}
  .news-badge{justify-self:start;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:48px 0 32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .site-footer{margin-top:72px;}
  .cat-hero{aspect-ratio:auto;min-height:340px;}
  .cat-hero-inner{padding:26px 22px;}
  .hero-meta span{padding:0 12px;font-size:12px;}
  .hero-meta span:first-child{padding-left:0;}
  .cta-band{padding:28px 22px;}
  .cta-form .btn{width:100%;}
  .field{flex:1 1 100%;}
  .timeline{grid-template-columns:1fr;}
  .tl-item{border-right:none;border-top:1px solid var(--line);padding:22px 0;}
  .tl-item:first-child{border-top:none;}
}
@media (max-width:520px){
  .logo-mark{font-size:16px;}
  .logo-badge{font-size:10px;padding:3px 7px;}
  .hero-sub{font-size:15.5px;}
  .quick-title{font-size:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .split-media:hover img,.quick-item:hover,.news-item:hover{transform:none;}
}

/* roulang page: category3 */
:root{
  --bg-0:#090A0F; --bg-1:#0F1118; --bg-2:#151823; --bg-3:#1C2030;
  --line:rgba(255,255,255,.08); --line-strong:rgba(255,255,255,.16);
  --c-primary:#2CE8B4; --c-primary-dim:#1BA98A; --c-secondary:#7C5CFF;
  --c-accent:#FF3E7F; --c-warn:#FFC24D;
  --t-1:#EEF2F8; --t-2:#A7B0C0; --t-3:#6C7486;
  --radius-card:18px; --radius-btn:12px; --radius-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.04), 0 20px 40px -32px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px var(--c-primary), 0 18px 46px -22px rgba(44,232,180,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace, SFMono-Regular, Consolas, monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16.5px; line-height:1.85; color:var(--t-2);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 620px at 88% -10%, rgba(124,92,255,.16), transparent 62%),
    radial-gradient(760px 520px at 6% 2%, rgba(44,232,180,.10), transparent 60%),
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:auto,auto,24px 24px,24px 24px;
  background-attachment:fixed,fixed,fixed,fixed;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;color:var(--t-1);letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:40px;padding-right:40px;}
@media (min-width:1536px){ .container{max-width:1280px;} }

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(15,17,24,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,232,180,.75),transparent);
  pointer-events:none;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px;}
.logo{display:inline-flex;align-items:center;gap:8px;font-weight:800;letter-spacing:-.02em;}
.logo-mark{font-size:19px;color:var(--t-1);}
.logo-badge{
  font-size:12px;line-height:1;padding:5px 8px;letter-spacing:.12em;
  color:var(--c-primary);border:1px solid rgba(44,232,180,.55);
  border-radius:var(--radius-pill);
  box-shadow:0 0 14px -6px rgba(44,232,180,.8);
}
.nav-desktop{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:10px 12px;font-size:14.5px;color:var(--t-2);border-radius:10px;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--t-1);background:rgba(255,255,255,.04);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--t-1);text-shadow:0 0 12px rgba(44,232,180,.45);}
.nav-link.active::after{transform:scaleX(1);}
.nav-more{position:relative;}
.nav-more-btn .caret{font-size:10px;color:var(--t-3);}
.nav-dropdown{
  position:absolute;top:calc(100% + 10px);left:-8px;min-width:212px;
  background:var(--bg-2);border:1px solid var(--line-strong);
  border-radius:14px;padding:8px;box-shadow:0 24px 50px -26px rgba(0,0,0,.95);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.nav-more:hover .nav-dropdown,.nav-more.open .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0);}
.nav-dropdown a{
  display:block;padding:9px 12px;font-size:14px;color:var(--t-2);
  border-left:2px solid transparent;border-radius:8px;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-dropdown a:hover{background:rgba(255,255,255,.05);color:var(--t-1);border-left-color:var(--c-primary);}
.nav-dropdown a.active{color:var(--c-primary);border-left-color:var(--c-primary);}
.header-actions{display:flex;align-items:center;gap:12px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-primary{
  background:var(--c-primary);color:var(--bg-0);
  box-shadow:0 10px 26px -14px rgba(44,232,180,.9);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px var(--c-primary),0 16px 34px -14px rgba(44,232,180,.75);}
.btn-primary:active{transform:translateY(1px);}
.btn-outline{
  background:transparent;border-color:var(--line-strong);color:var(--t-1);
}
.btn-outline:hover{border-color:var(--c-primary);color:var(--t-1);box-shadow:0 0 0 1px rgba(44,232,180,.35);}
.btn-outline:active{transform:translateY(1px);}
.btn-full{width:100%;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--c-primary);
  font-size:14px;font-weight:600;transition:color .2s var(--ease);
}
.link-arrow span{transition:transform .2s var(--ease);}
.link-arrow:hover span{transform:translateX(4px);}

.burger{
  display:none;width:42px;height:42px;border:1px solid var(--line-strong);
  border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:4px;
}
.burger span{display:block;width:17px;height:1.6px;background:var(--t-1);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease);}
.burger.open span:nth-child(1){transform:translateY(5.6px) rotate(45deg);}
.burger.open span:nth-child(2){opacity:0;}
.burger.open span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg);}

.mobile-drawer{
  display:none;position:fixed;left:0;right:0;top:60px;bottom:0;z-index:70;
  background:var(--bg-0);border-top:1px solid rgba(44,232,180,.35);
  padding:18px 20px 40px;overflow-y:auto;
}
.mobile-drawer.show{display:block;}
.mobile-drawer a{
  display:flex;align-items:center;height:48px;padding:0 12px;font-size:15.5px;
  color:var(--t-2);border-radius:10px;border-left:2px solid transparent;
}
.mobile-drawer a.active,.mobile-drawer a:hover{color:var(--t-1);background:rgba(255,255,255,.05);border-left-color:var(--c-primary);}
.drawer-label{font-size:12px;letter-spacing:.12em;color:var(--t-3);padding:16px 12px 8px;}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t-3);padding-top:26px;
}
.breadcrumb a{color:var(--t-2);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:var(--t-3);opacity:.6;}

/* ---------- Hero ---------- */
.cat-hero{padding:26px 0 0;}
.hero-panel{
  position:relative;margin-top:22px;border-radius:22px;overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(120deg, rgba(9,10,15,.94), rgba(15,17,24,.82)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding:52px 48px 44px;
}
.hero-panel::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.7;
}
.hero-inner{position:relative;z-index:1;max-width:820px;}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;color:var(--c-primary);
  border:1px solid rgba(44,232,180,.5);border-radius:var(--radius-pill);
  padding:6px 13px;background:rgba(44,232,180,.08);
}
h1{
  margin-top:20px;
  font-size:52px;line-height:1.12;font-weight:800;letter-spacing:-.02em;
}
.hero-lead{margin-top:18px;font-size:17px;line-height:1.8;color:var(--t-2);max-width:640px;}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;}

.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:44px;border-top:1px solid var(--line);padding-top:26px;gap:0;
}
.metric{padding:0 20px;position:relative;}
.metric:first-child{padding-left:0;}
.metric+.metric::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;background:var(--line-strong);}
.metric-num{font-family:var(--mono);font-size:28px;font-weight:700;color:var(--c-primary);line-height:1.2;}
.metric-label{font-size:13px;color:var(--t-3);margin-top:6px;}

/* ---------- Sections ---------- */
.section{padding:96px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px;}
.section-tag{
  display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--c-primary);
  border-left:2px solid var(--c-primary);padding-left:10px;margin-bottom:14px;
}
h2{font-size:33px;line-height:1.25;font-weight:700;}
.section-desc{margin-top:12px;font-size:15px;color:var(--t-2);max-width:560px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- Split layout ---------- */
.split{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.split-sticky{position:sticky;top:96px;}
.feature-list{border-top:1px solid var(--line);}
.feature-row{
  display:grid;grid-template-columns:56px 1fr 22px;gap:16px;align-items:center;
  padding:20px 16px;border-bottom:1px solid var(--line);
  position:relative;transition:background .2s var(--ease),transform .2s var(--ease);
}
.feature-row::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--c-primary);border-radius:3px;transform:scaleY(0);
  transition:transform .2s var(--ease);
}
.feature-row:hover{background:rgba(255,255,255,.03);transform:translateX(4px);}
.feature-row:hover::before{transform:scaleY(1);}
.feature-row:hover h3{color:var(--c-primary);}
.feature-row:hover .row-arrow{transform:translateX(4px);}
.f-num{font-family:var(--mono);font-size:14px;color:var(--t-3);}
.feature-row h3{font-size:18px;font-weight:600;transition:color .2s var(--ease);}
.feature-row p{font-size:14.5px;color:var(--t-2);margin-top:6px;}
.row-arrow{color:var(--t-3);font-size:16px;transition:transform .2s var(--ease),color .2s var(--ease);}
.feature-row:hover .row-arrow{color:var(--c-primary);}

/* ---------- Case grid ---------- */
.case-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;}
.card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-card);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.card:hover{border-color:var(--c-primary);box-shadow:var(--shadow-hover);transform:translateY(-4px);}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.tag{
  display:inline-block;font-size:12.5px;letter-spacing:.04em;color:var(--c-primary);
  background:rgba(44,232,180,.14);border-radius:var(--radius-pill);padding:4px 11px;
}
.timestamp{font-family:var(--mono);font-size:12.5px;color:var(--t-3);}
.card h3{font-size:21px;font-weight:600;line-height:1.45;}
.card p{margin-top:12px;font-size:15px;color:var(--t-2);}
.case-lg .case-figure{
  margin-top:20px;border-radius:14px;overflow:hidden;border:1px solid var(--line);
}
.case-figure img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.card:hover .case-figure img{transform:scale(1.03);}
.case-stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:22px;padding-top:20px;border-top:1px solid var(--line);}
.stat-num{font-family:var(--mono);font-size:24px;font-weight:700;color:var(--t-1);line-height:1.25;}
.stat-num.is-accent{color:var(--c-warn);}
.stat-label{font-size:12.5px;color:var(--t-3);margin-top:4px;}

.timeline{margin-top:22px;border-left:1px solid var(--line-strong);padding-left:20px;}
.timeline li{position:relative;padding-bottom:16px;}
.timeline li:last-child{padding-bottom:0;}
.timeline li::before{
  content:"";position:absolute;left:-25px;top:9px;width:9px;height:9px;border-radius:50%;
  background:var(--c-primary);box-shadow:0 0 0 3px rgba(44,232,180,.16);
}
.tl-date{font-family:var(--mono);font-size:12.5px;color:var(--c-primary);}
.tl-text{font-size:14.5px;color:var(--t-2);margin-top:2px;}
.case-side{display:grid;grid-template-rows:1fr 1fr;gap:24px;}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.step{
  position:relative;background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:26px 22px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.step:hover{border-color:var(--c-secondary);box-shadow:0 0 0 1px rgba(124,92,255,.5),0 18px 46px -24px rgba(124,92,255,.55);transform:translateY(-4px);}
.step-num{font-family:var(--mono);font-size:13px;color:var(--c-secondary);letter-spacing:.08em;}
.step h3{font-size:18px;margin-top:14px;font-weight:600;}
.step p{font-size:14.5px;margin-top:10px;color:var(--t-2);}

/* ---------- Scene ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px;}
.chip{
  font-size:13.5px;padding:8px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);color:var(--t-2);
  transition:all .2s var(--ease);
}
.chip.active{background:var(--c-primary);color:var(--bg-0);border-color:var(--c-primary);font-weight:600;}
.chip:hover{border-color:var(--c-primary);color:var(--t-1);}
.chip.active:hover{color:var(--bg-0);}
.scene-grid{display:grid;grid-template-columns:6fr 6fr;gap:40px;align-items:center;}
.scene-media{border-radius:14px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .3s var(--ease);}
.scene-media:hover img{transform:scale(1.03);}
.scene-copy h3{font-size:22px;font-weight:600;}
.scene-copy p{margin-top:14px;font-size:15.5px;}
.bullet-list{margin-top:20px;display:grid;gap:12px;}
.bullet-list li{position:relative;padding-left:20px;font-size:15px;color:var(--t-2);}
.bullet-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;
  background:var(--c-primary);transform:rotate(45deg);border-radius:2px;
}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;font-size:17px;font-weight:600;color:var(--t-1);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-primary);}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--t-2);
  transition:transform .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:var(--c-primary);color:var(--c-primary);}
.faq-body{
  padding:0 16px 22px;font-size:15px;color:var(--t-2);
  border-left:2px solid var(--c-primary);margin:0 0 6px 4px;background:rgba(255,255,255,.02);
  border-radius:0 10px 10px 0;
}

/* ---------- Related ---------- */
.related{display:grid;gap:0;border-top:1px solid var(--line);}
.related-item{
  display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;
  padding:18px 14px;border-bottom:1px solid var(--line);position:relative;
  transition:background .2s var(--ease);
}
.related-item::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;
  background:var(--c-primary);transform:scaleY(0);transition:transform .2s var(--ease);border-radius:3px;
}
.related-item:hover{background:rgba(255,255,255,.03);}
.related-item:hover::before{transform:scaleY(1);}
.related-item:hover .rel-title{color:var(--c-primary);}
.rel-title{font-size:16.5px;font-weight:600;color:var(--t-1);transition:color .2s var(--ease);}
.rel-meta{display:flex;gap:14px;align-items:center;margin-top:6px;font-size:12.5px;color:var(--t-3);}
.rel-meta .tag{font-size:12px;}

/* ---------- CTA ---------- */
.cta-band{
  margin-top:96px;
  background:
    radial-gradient(600px 300px at 90% 10%, rgba(124,92,255,.22), transparent 65%),
    var(--bg-1);
  border:1px solid rgba(44,232,180,.42);
  border-radius:22px;padding:52px 48px;
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:22px 22px;
}
.cta-copy{position:relative;z-index:1;}
.cta-copy h2{font-size:30px;}
.cta-copy p{margin-top:14px;font-size:15.5px;max-width:460px;}
.cta-form{position:relative;z-index:1;}
.form-row{display:flex;gap:12px;}
.field{
  flex:1;background:var(--bg-3);border:1px solid var(--line-strong);border-radius:12px;
  padding:13px 16px;font-size:15px;color:var(--t-1);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field::placeholder{color:var(--t-3);}
.field:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(44,232,180,.18);}
.form-note{margin-top:14px;font-size:12.5px;color:var(--t-3);line-height:1.7;}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:96px;background:var(--bg-1);border-top:1px solid var(--line);position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,232,180,.7),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-top:64px;padding-bottom:44px;}
.footer-brand p{margin-top:18px;font-size:14px;color:var(--t-2);max-width:300px;}
.socials{display:flex;gap:10px;margin-top:20px;}
.socials a{
  font-size:13px;padding:7px 14px;border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);color:var(--t-2);
  transition:all .2s var(--ease);
}
.socials a:hover{border-color:var(--c-primary);color:var(--c-primary);box-shadow:0 0 0 1px rgba(44,232,180,.3);}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--t-1);margin-bottom:18px;}
.footer-col ul{display:grid;gap:11px;}
.footer-col li a{
  display:inline-flex;align-items:center;gap:0;font-size:14px;color:var(--t-2);
  transition:color .2s var(--ease);
}
.footer-col li a::after{
  content:"→";opacity:0;transform:translateX(-4px);margin-left:0;
  transition:opacity .2s var(--ease),transform .2s var(--ease),margin-left .2s var(--ease);
  font-size:12px;
}
.footer-col li a:hover{color:var(--c-primary);}
.footer-col li a:hover::after{opacity:1;transform:translateX(0);margin-left:6px;}
.footer-col p{font-size:14px;color:var(--t-2);margin-bottom:10px;}
.footer-col p span{color:var(--t-1);font-family:var(--mono);font-size:13.5px;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:22px;padding-bottom:28px;
  font-size:12.5px;color:var(--t-3);
}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .container{padding-left:32px;padding-right:32px;}
  h1{font-size:44px;}
}
@media (max-width:1023px){
  .nav-desktop{display:none;}
  .burger{display:flex;}
  .header-inner{height:60px;}
  .hero-panel{padding:40px 32px 34px;}
  h1{font-size:38px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .split-sticky{position:static;}
  .case-grid{grid-template-columns:1fr;}
  .case-side{grid-template-rows:none;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band{grid-template-columns:1fr;padding:40px 32px;gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding-top:76px;}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px;}
  body{font-size:16px;}
  h1{font-size:31px;}
  h2{font-size:24px;}
  .hero-panel{padding:32px 20px 28px;border-radius:18px;}
  .hero-lead{font-size:15.5px;}
  .metrics{grid-template-columns:1fr 1fr;gap:22px 0;}
  .metric{padding-left:20px;}
  .metric:nth-child(odd){padding-left:0;}
  .metric:nth-child(odd)::before{display:none;}
  .metric:nth-child(3)::before,.metric:nth-child(4)::before{display:none;}
  .metric-num{font-size:23px;}
  .feature-row{grid-template-columns:40px 1fr;gap:12px;padding:16px 10px;}
  .row-arrow{display:none;}
  .faq-grid{grid-template-columns:1fr;gap:0;}
  .steps{grid-template-columns:1fr;}
  .form-row{flex-direction:column;}
  .form-row .btn{width:100%;}
  .cta-band{padding:32px 20px;margin-top:72px;}
  .cta-copy h2{font-size:23px;}
  .site-footer{margin-top:72px;}
  .footer-grid{grid-template-columns:1fr;padding-top:44px;}
  .related-item{grid-template-columns:1fr;}
  .case-stats{gap:20px;}
  .section-head{align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .card:hover,.step:hover,.feature-row:hover{transform:none;}
  .scene-media:hover img,.card:hover .case-figure img{transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --bg-0:#090A0F;
  --bg-1:#0F1118;
  --bg-2:#151823;
  --bg-3:#1C2030;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --c-primary:#2CE8B4;
  --c-primary-dim:#1BA98A;
  --c-secondary:#7C5CFF;
  --c-accent:#FF3E7F;
  --c-warn:#FFC24D;
  --t-1:#EEF2F8;
  --t-2:#A7B0C0;
  --t-3:#6C7486;
  --radius-card:18px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.04) inset, 0 20px 40px -32px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px var(--c-primary), 0 18px 46px -22px rgba(44,232,180,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Consolas,monospace;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
  font-family:var(--font-sans);
}

body{
  margin:0;
  padding:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  color:var(--t-1);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(920px 520px at 88% -8%, rgba(124,92,255,.18), transparent 62%),
    radial-gradient(760px 460px at 4% 2%, rgba(44,232,180,.12), transparent 60%),
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:auto,auto,24px 24px,24px 24px;
  background-attachment:fixed,fixed,scroll,scroll;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  margin:0;
  color:var(--t-1);
  font-weight:700;
  letter-spacing:-.01em;
  font-family:var(--font-sans);
}

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

a{
  color:inherit;
  text-decoration:none;
  transition:color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease), transform 200ms var(--ease), box-shadow 200ms var(--ease), opacity 200ms var(--ease);
}

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

button,input,select,textarea{
  font:inherit;
  color:inherit;
  border:0;
  background:none;
}

button{cursor:pointer;}

:focus-visible{
  outline:2px solid var(--c-primary);
  outline-offset:3px;
  border-radius:4px;
}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ============ 容器 ============ */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:40px;
  padding-right:40px;
}
@media (min-width:1536px){
  .container{max-width:1280px;}
}
@media (max-width:1023px){
  .container{padding-left:32px;padding-right:32px;}
}
@media (max-width:640px){
  .container{padding-left:20px;padding-right:20px;}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(15,17,24,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(44,232,180,.6), transparent);
  pointer-events:none;
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:68px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  flex-shrink:0;
}
.logo-mark{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--t-1);
}
.logo-badge{
  font-size:11px;
  line-height:1;
  letter-spacing:.14em;
  padding:5px 9px;
  border:1px solid var(--c-primary);
  border-radius:var(--radius-pill);
  color:var(--c-primary);
  background:rgba(44,232,180,.08);
}
.logo:hover .logo-mark{color:var(--c-primary);}

.nav-desktop{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
  flex-wrap:nowrap;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:9px 12px;
  font-size:15px;
  color:var(--t-2);
  border-radius:10px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:2px;
  height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 220ms var(--ease);
  border-radius:2px;
}
.nav-link:hover{color:var(--t-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{
  color:var(--t-1);
  text-shadow:0 0 12px rgba(44,232,180,.45);
}
.nav-link.active::after{transform:scaleX(1);}

.nav-more{position:relative;}
.nav-more-btn .caret{
  font-size:11px;
  color:var(--c-primary);
  transition:transform 220ms var(--ease);
}
.nav-more.open .caret{transform:rotate(180deg);}
.nav-dropdown{
  position:absolute;
  right:0;
  top:calc(100% + 12px);
  min-width:210px;
  background:var(--bg-2);
  border:1px solid var(--line-strong);
  border-radius:14px;
  padding:8px;
  box-shadow:0 24px 48px -28px rgba(0,0,0,.95);
  opacity:0;
  visibility:hidden;
  transform:translateY(-6px);
  transition:opacity 200ms var(--ease), transform 200ms var(--ease), visibility 200ms;
}
.nav-more:hover .nav-dropdown,
.nav-more:focus-within .nav-dropdown,
.nav-more.open .nav-dropdown{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.nav-dropdown a{
  display:block;
  padding:10px 12px 10px 14px;
  font-size:14.5px;
  color:var(--t-2);
  border-radius:10px;
  border-left:2px solid transparent;
}
.nav-dropdown a:hover{
  background:rgba(255,255,255,.04);
  color:var(--t-1);
  border-left-color:var(--c-primary);
}

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

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  transition:all 200ms var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--c-primary);
  color:var(--bg-0);
  box-shadow:0 10px 28px -18px rgba(44,232,180,.9);
}
.btn-primary:hover{
  filter:brightness(1.08);
  box-shadow:0 0 0 1px rgba(44,232,180,.5), 0 16px 38px -18px rgba(44,232,180,.75);
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--t-2);
}
.btn-ghost:hover{
  border-color:var(--c-primary);
  color:var(--t-1);
}
.btn-sm{padding:9px 16px;font-size:14px;}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--c-primary);
  font-weight:600;
}
.link-arrow .arw{transition:transform 200ms var(--ease);}
.link-arrow:hover .arw{transform:translateX(4px);}

.burger{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:42px;
  height:42px;
  padding:0 10px;
  border:1px solid var(--line-strong);
  border-radius:11px;
}
.burger span{
  display:block;
  height:2px;
  background:var(--t-1);
  border-radius:2px;
  transition:transform 200ms var(--ease), opacity 200ms var(--ease);
}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-drawer{
  display:none;
  position:fixed;
  inset:60px 0 0 0;
  z-index:75;
  background:var(--bg-0);
  border-top:1px solid rgba(44,232,180,.35);
  padding:20px 20px 40px;
  overflow-y:auto;
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:0 12px;
  font-size:16px;
  color:var(--t-2);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a.active,
.mobile-drawer a:hover{
  color:var(--t-1);
  border-left:3px solid var(--c-primary);
  padding-left:14px;
}
.drawer-label{
  padding:18px 12px 8px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--t-3);
}

@media (max-width:1023px){
  .nav-desktop{display:none;}
  .burger{display:flex;}
  .header-inner{justify-content:space-between;height:60px;}
  .header-actions .btn-sm{display:none;}
}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--t-3);
  padding-top:28px;
}
.breadcrumb a{color:var(--t-3);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:rgba(255,255,255,.18);}
.breadcrumb .current{color:var(--t-3);}

/* ============ 页面头部 ============ */
.page-head{padding-bottom:8px;}
.head-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:40px;
  align-items:center;
  padding:34px 0 40px;
}
.pill-label{
  display:inline-block;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--c-primary);
  border:1px solid rgba(44,232,180,.45);
  background:rgba(44,232,180,.07);
  border-radius:var(--radius-pill);
  padding:6px 14px;
  margin-bottom:20px;
}
.page-head h1{
  font-size:50px;
  line-height:1.12;
  letter-spacing:-.02em;
  font-weight:800;
  margin-bottom:18px;
}
.head-sub{
  font-size:17px;
  color:var(--t-2);
  max-width:36em;
  line-height:1.8;
}
.head-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}
.head-media{
  position:relative;
  border-radius:14px;
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:0 0 0 1px rgba(44,232,180,.16), 0 26px 60px -34px rgba(44,232,180,.5);
  aspect-ratio:16/10;
}
.head-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 400ms var(--ease);
}
.head-media:hover img{transform:scale(1.03);}
.head-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(9,10,15,.12), rgba(9,10,15,.62));
  pointer-events:none;
}

.metric-bar{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.metric{
  padding:22px 20px 22px 0;
  border-right:1px solid var(--line);
}
.metric:last-child{border-right:0;}
.metric .num{
  font-family:var(--font-mono);
  font-size:28px;
  color:var(--c-primary);
  line-height:1.2;
  letter-spacing:-.01em;
}
.metric .lbl{
  margin-top:6px;
  font-size:13px;
  color:var(--t-3);
}

/* ============ 文档区布局 ============ */
.doc-section{padding:88px 0 8px;}
.doc-layout{
  display:grid;
  grid-template-columns:minmax(0,3fr) minmax(0,9fr);
  gap:40px;
  align-items:start;
}
.toc{
  position:sticky;
  top:96px;
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px 18px;
  box-shadow:var(--shadow-card);
}
.toc h3{
  font-size:13px;
  letter-spacing:.12em;
  color:var(--t-3);
  font-weight:600;
  margin-bottom:14px;
}
.toc ol{counter-reset:toc;}
.toc li a{
  display:flex;
  gap:10px;
  align-items:baseline;
  padding:10px 10px 10px 12px;
  font-size:14.5px;
  color:var(--t-2);
  border-left:2px solid transparent;
  border-radius:0 10px 10px 0;
}
.toc li a:hover,
.toc li a.is-active{
  color:var(--t-1);
  background:rgba(255,255,255,.04);
  border-left-color:var(--c-primary);
}
.toc li a .idx{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--t-3);
}
.toc-note{
  margin-top:16px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--t-3);
  line-height:1.7;
}

.doc-main{min-width:0;}

.doc-intro{
  display:grid;
  grid-template-columns:minmax(0,1fr) 220px;
  gap:24px;
  align-items:center;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-card);
  margin-bottom:36px;
}
.doc-intro h2{
  font-size:21px;
  margin-bottom:10px;
}
.doc-intro p{
  font-size:15.5px;
  color:var(--t-2);
  line-height:1.8;
}
.doc-intro img{
  width:100%;
  aspect-ratio:1/1;
  object-fit:cover;
  border-radius:14px;
  border:1px solid var(--line-strong);
}

.faq-group{
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 26px 10px;
  margin-bottom:28px;
  box-shadow:var(--shadow-card);
  transition:border-color 220ms var(--ease), transform 220ms var(--ease);
}
.faq-group:hover{border-color:var(--line-strong);}
.group-head{
  display:flex;
  align-items:center;
  gap:12px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
  margin-bottom:6px;
}
.group-head .gidx{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--c-primary);
  border:1px solid rgba(44,232,180,.4);
  background:rgba(44,232,180,.08);
  border-radius:8px;
  padding:3px 8px;
}
.group-head h3{
  font-size:20px;
  font-weight:600;
}
.group-head .gcount{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--t-3);
}

.faq-item{
  border-bottom:1px solid var(--line);
  transition:background-color 200ms var(--ease);
}
.faq-item:last-child{border-bottom:0;}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:18px 6px;
  font-size:17px;
  font-weight:600;
  color:var(--t-1);
  transition:color 200ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-primary);}
.faq-item summary .qmark{
  flex:0 0 auto;
  margin-left:auto;
  width:22px;
  height:22px;
  line-height:20px;
  text-align:center;
  font-size:16px;
  color:var(--t-2);
  border:1px solid var(--line-strong);
  border-radius:7px;
  transition:transform 220ms var(--ease), color 220ms var(--ease), border-color 220ms var(--ease);
}
.faq-item[open]{background:rgba(255,255,255,.02);}
.faq-item[open] summary{color:var(--c-primary);}
.faq-item[open] summary .qmark{
  transform:rotate(45deg);
  color:var(--c-accent);
  border-color:rgba(255,62,127,.6);
}
.faq-item .answer{
  padding:0 6px 22px 18px;
  border-left:2px solid var(--c-primary);
  margin-left:4px;
  font-size:15.5px;
  color:var(--t-2);
  line-height:1.85;
}
.faq-item .answer strong{color:var(--t-1);font-weight:600;}

/* ============ 相关资讯 ============ */
.related{
  margin-top:44px;
  padding-top:32px;
  border-top:1px solid var(--line);
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:22px;
}
.section-head .tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--c-secondary);
  border:1px solid rgba(124,92,255,.45);
  background:rgba(124,92,255,.09);
  border-radius:var(--radius-pill);
  padding:5px 12px;
  margin-bottom:10px;
}
.section-head h2{
  font-size:28px;
  line-height:1.25;
}
.related-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.related-card{
  display:flex;
  gap:16px;
  align-items:center;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:18px;
  box-shadow:var(--shadow-card);
}
.related-card:hover{
  transform:translateY(-4px);
  border-color:var(--c-primary);
  box-shadow:var(--shadow-hover);
}
.related-card img{
  width:104px;
  height:78px;
  object-fit:cover;
  border-radius:12px;
  border:1px solid var(--line);
  flex:0 0 auto;
}
.related-card h3{
  font-size:16.5px;
  font-weight:600;
  margin-bottom:6px;
  line-height:1.5;
}
.related-card:hover h3{color:var(--c-primary);}
.related-card .meta{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12.5px;
  color:var(--t-3);
}
.related-card .meta .dot{width:3px;height:3px;border-radius:50%;background:var(--t-3);display:inline-block;}

/* ============ CTA ============ */
.cta-section{padding:96px 0;}
.cta-band{
  position:relative;
  background:var(--bg-1);
  border:1px solid rgba(44,232,180,.35);
  border-radius:24px;
  padding:44px;
  overflow:hidden;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px),
    radial-gradient(560px 300px at 88% 0%, rgba(124,92,255,.2), transparent 62%);
  background-size:24px 24px,24px 24px,auto;
}
.cta-grid{
  display:grid;
  grid-template-columns:minmax(0,6fr) minmax(0,6fr);
  gap:40px;
  align-items:center;
  position:relative;
  z-index:1;
}
.cta-band h2{
  font-size:32px;
  line-height:1.2;
  margin-bottom:14px;
}
.cta-band p{
  color:var(--t-2);
  font-size:16px;
  max-width:32em;
}
.cta-form{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}
.field{
  flex:1 1 240px;
  min-width:0;
}
.field input{
  width:100%;
  padding:14px 16px;
  background:var(--bg-3);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-btn);
  color:var(--t-1);
  font-size:15px;
  transition:border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}
.field input::placeholder{color:var(--t-3);}
.field input:focus{
  outline:none;
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(44,232,180,.18);
}
.cta-form .btn{flex:0 0 auto;}
.form-note{
  margin-top:14px;
  font-size:12.5px;
  color:var(--t-3);
  line-height:1.7;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  position:relative;
  margin-top:8px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(44,232,180,.6), transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,4fr) repeat(3, minmax(0,2.4fr));
  gap:40px;
  padding-top:64px;
  padding-bottom:44px;
}
.footer-brand p{
  margin-top:18px;
  font-size:14px;
  color:var(--t-2);
  line-height:1.8;
  max-width:30em;
}
.socials{
  display:flex;
  gap:10px;
  margin-top:20px;
  flex-wrap:wrap;
}
.socials a{
  font-size:13px;
  padding:7px 14px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  color:var(--t-2);
}
.socials a:hover{
  border-color:var(--c-primary);
  color:var(--c-primary);
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  margin-bottom:18px;
  color:var(--t-1);
}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul a{
  display:inline-flex;
  align-items:center;
  gap:0;
  font-size:14px;
  color:var(--t-2);
}
.footer-col ul a::after{
  content:"›";
  opacity:0;
  transform:translateX(-4px);
  transition:opacity 200ms var(--ease), transform 200ms var(--ease);
  color:var(--c-primary);
  margin-left:2px;
}
.footer-col ul a:hover{color:var(--c-primary);}
.footer-col ul a:hover::after{opacity:1;transform:translateX(4px);}
.footer-col p{
  font-size:14px;
  color:var(--t-2);
  margin-bottom:12px;
  line-height:1.75;
}
.footer-col p span{color:var(--t-1);font-family:var(--font-mono);font-size:13.5px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:22px;
  padding-bottom:30px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--t-3);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .page-head h1{font-size:44px;}
}
@media (max-width:1023px){
  .doc-layout{grid-template-columns:minmax(0,1fr);gap:28px;}
  .toc{position:static;top:auto;padding:16px;}
  .toc ol{display:flex;flex-wrap:wrap;gap:8px;}
  .toc ol li{flex:1 1 44%;}
  .toc li a{border-left-width:3px;border-radius:10px;}
  .toc-note{display:none;}
  .head-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .head-media{order:2;}
  .cta-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .related-list{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding-top:52px;}
  .cta-band{padding:34px;}
  .cta-band h2{font-size:27px;}
  .doc-section{padding-top:64px;}
  .cta-section{padding:72px 0;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .page-head h1{font-size:31px;}
  .head-sub{font-size:15.5px;}
  .metric-bar{grid-template-columns:repeat(2,minmax(0,1fr));}
  .metric{padding:18px 16px 18px 0;}
  .metric:nth-child(2){border-right:0;}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line);}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .section-head h2{font-size:23px;}
  .doc-intro{grid-template-columns:minmax(0,1fr);}
  .doc-intro img{aspect-ratio:16/9;}
  .faq-group{padding:20px 18px 6px;}
  .group-head h3{font-size:18px;}
  .faq-item summary{font-size:16px;padding:16px 2px;}
  .faq-item .answer{padding:0 2px 20px 14px;font-size:15px;}
  .cta-band{padding:26px 20px;border-radius:18px;}
  .cta-band h2{font-size:23px;}
  .cta-form .btn{width:100%;}
  .field{flex:1 1 100%;}
  .related-card{flex-direction:column;align-items:flex-start;}
  .related-card img{width:100%;height:150px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding-bottom:32px;}
  .to-top{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category5 */
:root{
    --bg-0:#090A0F;
    --bg-1:#0F1118;
    --bg-2:#151823;
    --bg-3:#1C2030;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.16);
    --c-primary:#2CE8B4;
    --c-primary-dim:#1BA98A;
    --c-secondary:#7C5CFF;
    --c-accent:#FF3E7F;
    --c-warn:#FFC24D;
    --t-1:#EEF2F8;
    --t-2:#A7B0C0;
    --t-3:#6C7486;
    --radius-card:18px;
    --radius-btn:12px;
    --radius-pill:999px;
    --ease:cubic-bezier(.2,.7,.3,1);
    --shadow-card:0 1px 0 rgba(255,255,255,.04), 0 20px 40px -32px rgba(0,0,0,.9);
    --shadow-hover:0 0 0 1px var(--c-primary), 0 18px 46px -22px rgba(44,232,180,.45);
    --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
    --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background-color:var(--bg-0);
    background-image:
      radial-gradient(900px 520px at 88% -8%, rgba(124,92,255,.20), transparent 62%),
      radial-gradient(760px 480px at 6% 4%, rgba(44,232,180,.13), transparent 60%),
      linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
    background-size:auto, auto, 24px 24px, 24px 24px;
    background-repeat:no-repeat, no-repeat, repeat, repeat;
    color:var(--t-1);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;border-radius:14px;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  h1,h2,h3,h4{margin:0;line-height:1.2;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  .mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
  :focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:4px;}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:640px){ .container{padding-left:32px;padding-right:32px;} }
  @media (min-width:1024px){ .container{padding-left:40px;padding-right:40px;} }
  @media (min-width:1536px){ .container{max-width:1280px;} }

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:rgba(15,17,24,.92);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
    background:linear-gradient(90deg,transparent,rgba(44,232,180,.75),rgba(124,92,255,.6),transparent);
    pointer-events:none;
  }
  .header-inner{
    display:flex;align-items:center;justify-content:space-between;
    gap:18px;height:68px;
  }
  .logo{display:inline-flex;align-items:center;gap:8px;}
  .logo-mark{
    font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--t-1);
    text-shadow:0 0 18px rgba(44,232,180,.28);
  }
  .logo-badge{
    font-size:11px;letter-spacing:.14em;padding:2px 8px;border-radius:var(--radius-pill);
    color:var(--c-primary);border:1px solid rgba(44,232,180,.55);
    background:rgba(44,232,180,.08);line-height:1.6;
  }
  .nav-desktop{display:none;align-items:center;gap:4px;}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;gap:6px;
    padding:10px 12px;font-size:14.5px;color:var(--t-2);
    background:none;border:0;cursor:pointer;
    transition:color .2s var(--ease);
    white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
    background:linear-gradient(90deg,var(--c-primary),var(--c-secondary));
    transform:scaleX(0);transform-origin:left;
    transition:transform .22s var(--ease);
    border-radius:2px;
  }
  .nav-link:hover{color:var(--t-1);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.active{
    color:var(--t-1);
    text-shadow:0 0 12px rgba(44,232,180,.45);
  }
  .nav-link.active::after{transform:scaleX(1);}
  .nav-more{position:relative;}
  .nav-more-btn .caret{font-size:11px;color:var(--c-primary);}
  .nav-dropdown{
    position:absolute;top:calc(100% + 10px);left:0;min-width:220px;
    background:var(--bg-2);border:1px solid var(--line-strong);
    border-radius:14px;padding:8px;
    box-shadow:0 24px 50px -26px rgba(0,0,0,.95);
    opacity:0;visibility:hidden;transform:translateY(-6px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  }
  .nav-more:hover .nav-dropdown,
  .nav-more:focus-within .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-dropdown a{
    display:block;padding:9px 12px;font-size:14px;color:var(--t-2);
    border-left:2px solid transparent;border-radius:8px;
    transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  }
  .nav-dropdown a:hover{background:rgba(255,255,255,.05);color:var(--t-1);border-left-color:var(--c-primary);}
  .header-actions{display:flex;align-items:center;gap:10px;}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--radius-btn);
    font-size:14.5px;font-weight:600;
    padding:12px 22px;border:1px solid transparent;cursor:pointer;
    transition:transform .18s var(--ease),box-shadow .2s var(--ease),
               background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  }
  .btn-primary{background:var(--c-primary);color:var(--bg-0);box-shadow:0 10px 30px -18px rgba(44,232,180,.9);}
  .btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px var(--c-primary),0 16px 40px -18px rgba(44,232,180,.75);}
  .btn-primary:active{transform:translateY(1px);}
  .btn-ghost{background:transparent;color:var(--t-1);border-color:var(--line-strong);}
  .btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-sm{padding:9px 16px;font-size:13.5px;}
  .btn-block{width:100%;}
  .link-more{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--c-primary);font-size:14px;font-weight:600;
  }
  .link-more .arrow{transition:transform .2s var(--ease);}
  .link-more:hover .arrow{transform:translateX(4px);}

  .burger{
    display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
    width:42px;height:42px;padding:0 10px;
    background:transparent;border:1px solid var(--line-strong);border-radius:12px;
    cursor:pointer;
  }
  .burger span{display:block;height:2px;border-radius:2px;background:var(--t-1);transition:transform .2s var(--ease),opacity .2s var(--ease);}
  .burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .mobile-drawer{
    display:none;
    background:var(--bg-0);
    border-top:1px solid rgba(44,232,180,.35);
    padding:12px 20px 26px;
  }
  .mobile-drawer.open{display:block;}
  .mobile-drawer a{
    display:flex;align-items:center;height:48px;
    font-size:15px;color:var(--t-2);
    border-bottom:1px solid var(--line);
  }
  .mobile-drawer a.active{color:var(--c-primary);border-left:2px solid var(--c-primary);padding-left:10px;}
  .drawer-label{
    margin-top:14px;font-size:12px;letter-spacing:.12em;color:var(--t-3);
  }
  @media (min-width:1024px){
    .nav-desktop{display:flex;}
    .burger{display:none;}
    .mobile-drawer{display:none !important;}
  }

  /* ---------- breadcrumb ---------- */
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--t-3);
    padding:22px 0 0;
  }
  .breadcrumb a{color:var(--t-2);transition:color .18s var(--ease);}
  .breadcrumb a:hover{color:var(--c-primary);}
  .breadcrumb .sep{color:rgba(255,255,255,.22);}
  .breadcrumb .current{color:var(--t-3);}

  /* ---------- hero ---------- */
  .cat-hero{
    padding:30px 0 0;
  }
  .hero-panel{
    position:relative;overflow:hidden;
    background:var(--bg-1);
    border:1px solid var(--line);
    border-radius:22px;
    padding:36px 26px;
    display:grid;
    gap:26px;
  }
  .hero-panel::before{
    content:"";position:absolute;inset:0;
    background:
      radial-gradient(560px 320px at 92% -30%, rgba(124,92,255,.28), transparent 62%),
      radial-gradient(480px 300px at 2% 120%, rgba(44,232,180,.18), transparent 60%);
    pointer-events:none;
  }
  .hero-copy{position:relative;z-index:1;}
  .pill{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;letter-spacing:.12em;
    color:var(--c-primary);
    border:1px solid rgba(44,232,180,.5);
    background:rgba(44,232,180,.07);
    border-radius:var(--radius-pill);
    padding:5px 12px;
  }
  h1{
    font-size:30px;font-weight:800;letter-spacing:-.02em;line-height:1.12;
    margin:16px 0 14px;
  }
  .hero-sub{color:var(--t-2);font-size:16px;max-width:640px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}

  .hero-media{position:relative;z-index:1;}
  .hero-media .frame{
    border-radius:14px;overflow:hidden;border:1px solid var(--line-strong);
    box-shadow:0 0 0 1px rgba(44,232,180,.18),0 30px 60px -34px rgba(44,232,180,.5);
    aspect-ratio:16/10;background:var(--bg-2);
  }
  .hero-media .frame img{width:100%;height:100%;object-fit:cover;border-radius:0;}
  .hero-media .float-card{
    position:absolute;right:-6px;bottom:-18px;
    width:190px;background:var(--bg-2);border:1px solid var(--line-strong);
    border-radius:14px;padding:14px 16px;
    box-shadow:var(--shadow-card);
  }
  .hero-media .float-card .k{font-size:12px;color:var(--t-3);letter-spacing:.08em;}
  .hero-media .float-card .v{font-size:22px;font-weight:700;color:var(--c-warn);}

  .stat-strip{
    display:grid;grid-template-columns:repeat(2,1fr);
    border-top:1px solid var(--line);
    margin-top:30px;padding-top:20px;gap:14px 0;
  }
  .stat-strip .stat{padding-right:16px;}
  .stat-strip .stat + .stat{border-left:1px solid var(--line);padding-left:18px;}
  .stat-strip .num{font-size:24px;font-weight:700;color:var(--c-primary);}
  .stat-strip .lab{font-size:13px;color:var(--t-3);}

  @media (min-width:1024px){
    .hero-panel{grid-template-columns:7fr 5fr;align-items:center;padding:52px 46px;}
    h1{font-size:46px;}
    .stat-strip{grid-template-columns:repeat(4,1fr);}
  }

  /* ---------- section ---------- */
  section{padding:56px 0 0;}
  .section-head{
    display:flex;flex-direction:column;gap:12px;
    margin-bottom:32px;
  }
  .section-head .left{display:flex;flex-direction:column;gap:12px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;letter-spacing:.14em;color:var(--c-primary);
  }
  .eyebrow::before{content:"";width:18px;height:1px;background:var(--c-primary);display:block;}
  h2{font-size:24px;font-weight:700;letter-spacing:-.01em;}
  .section-desc{color:var(--t-2);font-size:15px;max-width:680px;}
  @media (min-width:1024px){
    section{padding-top:96px;}
    h2{font-size:34px;}
    .section-head{flex-direction:row;align-items:flex-end;justify-content:space-between;}
  }

  /* ---------- compare table ---------- */
  .table-shell{
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    background:var(--bg-1);
    overflow:hidden;
  }
  .table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
  table.plan-table{
    width:100%;min-width:820px;border-collapse:collapse;
  }
  table.plan-table th,
  table.plan-table td{
    padding:16px 20px;text-align:left;font-size:14.5px;vertical-align:top;
    border-bottom:1px solid var(--line);
  }
  table.plan-table thead th{
    background:var(--bg-2);
    color:var(--t-1);font-size:15px;font-weight:700;
    border-bottom:1px solid rgba(44,232,180,.45);
    box-shadow:inset 0 -1px 0 rgba(44,232,180,.25);
  }
  table.plan-table thead th .plan-name{display:block;font-size:16px;}
  table.plan-table thead th .plan-price{
    display:flex;align-items:baseline;gap:6px;margin-top:8px;
    color:var(--c-primary);font-size:26px;font-weight:700;
  }
  table.plan-table thead th .plan-price small{font-size:12px;color:var(--t-3);font-weight:400;letter-spacing:.06em;}
  table.plan-table tbody th{
    width:190px;color:var(--t-2);font-weight:500;background:rgba(255,255,255,.015);
  }
  table.plan-table tbody tr:hover td{background:rgba(44,232,180,.045);}
  .cell-yes{color:var(--c-primary);font-weight:600;}
  .cell-dim{color:var(--t-3);}
  .thead-note{
    display:inline-block;margin-top:8px;font-size:11px;letter-spacing:.1em;
    color:var(--c-accent);border:1px solid rgba(255,62,127,.5);
    border-radius:var(--radius-pill);padding:2px 9px;
  }
  .table-foot{
    display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
    padding:16px 20px;border-top:1px solid var(--line);background:var(--bg-1);
    font-size:13px;color:var(--t-3);
  }
  .scroll-hint{font-size:12.5px;color:var(--t-3);}
  @media (min-width:1024px){ .scroll-hint{display:none;} }

  /* ---------- steps ---------- */
  .steps{
    display:grid;gap:20px;
  }
  .step-card{
    position:relative;
    background:var(--bg-2);border:1px solid var(--line);
    border-radius:var(--radius-card);padding:26px 24px;
    box-shadow:var(--shadow-card);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  }
  .step-card:hover{transform:translateY(-4px);border-color:rgba(44,232,180,.6);box-shadow:var(--shadow-hover);}
  .step-num{
    font-family:var(--font-mono);font-size:30px;font-weight:700;
    color:transparent;-webkit-text-stroke:1px rgba(44,232,180,.75);
    letter-spacing:.04em;line-height:1;
  }
  .step-card h3{font-size:20px;font-weight:600;margin:14px 0 10px;}
  .step-card p{color:var(--t-2);font-size:14.5px;}
  .step-card ul{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
  .step-card li{
    position:relative;padding-left:18px;font-size:14px;color:var(--t-2);
  }
  .step-card li::before{
    content:"";position:absolute;left:0;top:11px;width:7px;height:7px;
    background:var(--c-primary);transform:rotate(45deg);
  }
  .step-line{
    position:absolute;left:24px;right:24px;top:0;height:2px;
    background:linear-gradient(90deg,rgba(44,232,180,.7),rgba(124,92,255,.35),transparent);
  }
  @media (min-width:768px){ .steps{grid-template-columns:repeat(3,1fr);} }

  /* ---------- included list ---------- */
  .split{display:grid;gap:26px;}
  .media-block{
    border-radius:14px;overflow:hidden;border:1px solid var(--line-strong);
    background:var(--bg-2);aspect-ratio:4/3;
  }
  .media-block img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s var(--ease);}
  .media-block:hover img{transform:scale(1.03);}
  .info-list{margin-top:20px;display:flex;flex-direction:column;}
  .info-list li{
    display:flex;gap:14px;align-items:flex-start;
    padding:16px 0;border-bottom:1px solid var(--line);
  }
  .info-list li:first-child{border-top:1px solid var(--line);}
  .info-list .idx{
    font-family:var(--font-mono);font-size:13px;color:var(--c-primary);
    padding-top:3px;min-width:34px;letter-spacing:.06em;
  }
  .info-list h3{font-size:17px;font-weight:600;}
  .info-list p{font-size:14.5px;color:var(--t-2);margin-top:4px;}
  @media (min-width:1024px){ .split{grid-template-columns:6fr 6fr;align-items:start;gap:48px;} }

  /* ---------- faq ---------- */
  .faq-grid{display:grid;gap:0 40px;}
  details.faq{
    border-bottom:1px solid var(--line);
    position:relative;
  }
  details.faq summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 4px;font-size:16.5px;font-weight:600;color:var(--t-1);
    transition:background .2s var(--ease);
  }
  details.faq summary::-webkit-details-marker{display:none;}
  details.faq summary .plus{
    flex:none;width:22px;height:22px;position:relative;
    transition:transform .22s var(--ease);
  }
  details.faq summary .plus::before,
  details.faq summary .plus::after{
    content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);
    transform:translate(-50%,-50%);
  }
  details.faq summary .plus::before{width:14px;height:2px;}
  details.faq summary .plus::after{width:2px;height:14px;}
  details.faq[open] summary .plus{transform:rotate(45deg);}
  details.faq[open] summary{color:var(--c-primary);}
  details.faq .answer{
    padding:2px 4px 20px 16px;
    border-left:2px solid var(--c-primary);
    background:rgba(255,255,255,.02);
    margin-bottom:6px;
    font-size:14.5px;color:var(--t-2);
  }
  details.faq summary:hover{background:rgba(255,255,255,.02);}
  @media (min-width:1024px){ .faq-grid{grid-template-columns:1fr 1fr;} }

  /* ---------- form / cta ---------- */
  .cta-band{
    position:relative;overflow:hidden;
    background:var(--bg-1);
    border:1px solid rgba(44,232,180,.35);
    border-radius:22px;
    padding:32px 24px;
    display:grid;gap:26px;
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background:
      radial-gradient(520px 260px at 88% 0%, rgba(124,92,255,.22), transparent 60%),
      radial-gradient(420px 240px at 0% 100%, rgba(44,232,180,.12), transparent 60%);
    pointer-events:none;
  }
  .cta-copy,.cta-form{position:relative;z-index:1;}
  .cta-copy h2{font-size:24px;}
  .cta-copy p{color:var(--t-2);margin-top:12px;font-size:15px;}
  .field{display:flex;flex-direction:column;gap:8px;margin-bottom:14px;}
  .field label{font-size:13px;color:var(--t-2);}
  .field input,.field select,.field textarea{
    width:100%;background:var(--bg-3);
    border:1px solid var(--line-strong);border-radius:var(--radius-btn);
    color:var(--t-1);font-size:15px;font-family:inherit;
    padding:13px 14px;
    transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
  }
  .field input::placeholder,.field textarea::placeholder{color:var(--t-3);}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--c-primary);
    box-shadow:0 0 0 3px rgba(44,232,180,.18);
  }
  .field .hint{font-size:12.5px;color:var(--t-3);}
  .field .err{font-size:13px;color:var(--c-accent);display:none;}
  .field.has-error input{border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(255,62,127,.16);}
  .field.has-error .err{display:block;}
  .form-note{font-size:12px;color:var(--t-3);margin-top:12px;line-height:1.7;}
  @media (min-width:1024px){
    .cta-band{grid-template-columns:6fr 6fr;padding:48px 46px;align-items:start;}
    .cta-copy h2{font-size:32px;}
  }

  /* ---------- related ---------- */
  .card-grid{display:grid;gap:20px;}
  .card{
    display:flex;flex-direction:column;gap:14px;
    background:var(--bg-2);border:1px solid var(--line);
    border-radius:var(--radius-card);padding:24px;
    box-shadow:var(--shadow-card);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  }
  .card:hover{transform:translateY(-4px);border-color:var(--c-primary);box-shadow:var(--shadow-hover);}
  .card .tag{
    align-self:flex-start;
    font-size:12px;letter-spacing:.08em;color:var(--c-primary);
    background:rgba(44,232,180,.12);border-radius:var(--radius-pill);
    padding:3px 10px;
  }
  .card h3{font-size:18px;font-weight:600;}
  .card p{font-size:14.5px;color:var(--t-2);}
  .card .meta{display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--t-3);}
  .card .meta .dot{width:4px;height:4px;border-radius:50%;background:var(--t-3);display:block;}
  @media (min-width:768px){ .card-grid{grid-template-columns:repeat(2,1fr);} }
  @media (min-width:1024px){ .card-grid{grid-template-columns:repeat(3,1fr);} }

  /* ---------- footer ---------- */
  .site-footer{
    margin-top:88px;
    background:var(--bg-1);
    border-top:1px solid var(--line);
    position:relative;
  }
  .site-footer::before{
    content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(44,232,180,.7),rgba(124,92,255,.55),transparent);
  }
  .footer-grid{
    display:grid;gap:34px;
    padding-top:52px;padding-bottom:34px;
  }
  .footer-brand p{color:var(--t-2);font-size:14px;margin-top:14px;max-width:330px;}
  .socials{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap;}
  .socials a{
    font-size:13px;color:var(--t-2);
    border:1px solid var(--line-strong);border-radius:var(--radius-pill);
    padding:6px 14px;
    transition:color .18s var(--ease),border-color .18s var(--ease);
  }
  .socials a:hover{color:var(--c-primary);border-color:var(--c-primary);}
  .footer-col h4{font-size:14px;font-weight:600;letter-spacing:.06em;color:var(--t-1);margin-bottom:16px;}
  .footer-col ul{display:flex;flex-direction:column;gap:10px;}
  .footer-col a{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;color:var(--t-2);
    transition:color .18s var(--ease);
  }
  .footer-col a::after{
    content:"→";opacity:0;transform:translateX(-4px);
    transition:opacity .18s var(--ease),transform .18s var(--ease);
    font-size:12px;
  }
  .footer-col a:hover{color:var(--c-primary);}
  .footer-col a:hover::after{opacity:1;transform:translateX(0);}
  .footer-col p{font-size:14px;color:var(--t-2);margin-bottom:8px;}
  .footer-col p span{color:var(--t-1);font-family:var(--font-mono);font-size:13px;}
  .footer-bottom{
    display:flex;flex-direction:column;gap:10px;
    border-top:1px solid var(--line);
    padding-top:20px;padding-bottom:28px;
    font-size:12.5px;color:var(--t-3);
  }
  @media (min-width:768px){
    .footer-grid{grid-template-columns:repeat(2,1fr);}
    .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}
  }
  @media (min-width:1024px){
    .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;}
  }

  @media (max-width:519px){
    h1{font-size:27px;}
    .hero-media .float-card{position:static;width:100%;margin-top:14px;}
    .btn{width:100%;}
    .hero-actions .btn{width:100%;}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
    .card:hover,.step-card:hover{transform:none;}
  }