/* roulang page: index */
:root{
  --bg:#060A12;
  --surface:#0B1420;
  --alt:#08101B;
  --brand:#17E3B4;
  --brand-deep:#0FA98A;
  --amber:#FFB15A;
  --text:#EAF2FF;
  --muted:#A9B8CC;
  --weak:#6E7F95;
  --line:rgba(120,180,200,.14);
  --line-hi:rgba(23,227,180,.38);
  --glass:rgba(16,26,40,.55);
  --glass-solid:rgba(16,26,40,.92);
  --r-card:18px;
  --r-img:14px;
  --r-btn:999px;
  --r-input:12px;
  --r-badge:8px;
  --sh-1:0 10px 30px rgba(0,0,0,.35);
  --sh-2:0 18px 44px rgba(0,0,0,.5);
  --glow:0 0 26px rgba(23,227,180,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:220ms cubic-bezier(.2,.7,.3,1);
  --ff:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--ff);
  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:
    radial-gradient(900px 520px at 82% -8%, rgba(23,227,180,.10), transparent 62%),
    radial-gradient(760px 460px at 6% 8%, rgba(23,227,180,.06), transparent 66%);
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t);}
a:hover,a:focus{color:var(--brand);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:1.15em;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.section{padding:96px 0;position:relative;z-index:1;}
.section--alt{background:var(--alt);}
.section--tight{padding:64px 0;}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  height:72px;
  background:linear-gradient(180deg,rgba(6,10,18,.86),rgba(6,10,18,.42));
  transition:background var(--t),border-color var(--t),box-shadow var(--t);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(6,10,18,.82);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  border-bottom:1px solid var(--line);
  box-shadow:0 8px 26px rgba(0,0,0,.36);
}
.nav-inner{
  height:72px;
  display:flex;
  align-items:center;
  gap:28px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand__mark{
  width:22px;height:22px;
  display:inline-block;
  position:relative;
  border-radius:7px;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  box-shadow:var(--glow);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:3px;
  background:#04140F;
}
.brand__text{
  font-size:17px;
  font-weight:600;
  letter-spacing:-.01em;
  color:var(--text);
  white-space:nowrap;
}
.brand:hover .brand__text{color:var(--brand);}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 14px;
  font-size:15px;
  font-weight:500;
  color:rgba(234,242,255,.7);
  border-radius:999px;
  transition:color var(--t),background-color var(--t);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform var(--t);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{
  color:var(--text);
  background:rgba(23,227,180,.10);
  box-shadow:inset 0 0 0 1px rgba(23,227,180,.22);
}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:14px;}
.nav-search{
  position:relative;
  width:200px;height:38px;
  display:flex;align-items:center;
  border-radius:999px;
  background:rgba(16,26,40,.72);
  border:1px solid var(--line);
  padding:0 12px 0 34px;
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-search:focus-within{border-color:var(--line-hi);box-shadow:0 0 0 3px rgba(23,227,180,.10);}
.nav-search i{
  position:absolute;left:13px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--weak);
}
.nav-search input{
  width:100%;height:100%;
  border:0;background:transparent;color:var(--text);
  font-size:13.5px;outline:none;
  margin:0;padding:0;
  box-shadow:none;
}
.nav-search input::placeholder{color:var(--weak);}
.nav-login{font-size:15px;font-weight:500;color:rgba(234,242,255,.78);white-space:nowrap;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  background:rgba(16,26,40,.7);
  border:1px solid var(--line);
  color:var(--text);
  font-size:16px;
  cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-drawer{
  display:none;
  background:rgba(8,16,27,.98);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:12px 0 24px;
}
.nav-drawer.is-open{display:block;}
.nav-drawer a{
  display:flex;align-items:center;
  min-height:52px;
  padding:0 24px;
  font-size:17px;
  font-weight:500;
  color:rgba(234,242,255,.82);
  border-bottom:1px solid rgba(120,180,200,.08);
}
.nav-drawer a.is-active{color:var(--brand);}
.nav-drawer .drawer-foot{padding:18px 24px 0;display:flex;flex-direction:column;gap:12px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),border-color var(--t),color var(--t);
}
.btn--sm{height:40px;padding:0 20px;font-size:14px;}
.btn--primary{
  background:var(--brand);
  color:#04140F;
  box-shadow:var(--glow);
}
.btn--primary:hover{background:#2BEBC0;color:#04140F;box-shadow:0 0 34px rgba(23,227,180,.42);}
.btn--primary:active{transform:scale(.98);}
.btn--ghost{
  background:transparent;
  color:var(--text);
  border-color:rgba(23,227,180,.35);
}
.btn--ghost:hover{background:rgba(23,227,180,.12);border-color:var(--brand);color:var(--text);}
.btn--ghost:active{transform:scale(.98);}
.btn--text{
  display:inline-flex;align-items:center;gap:8px;
  height:auto;padding:0;border:0;background:transparent;
  color:var(--brand);font-size:15px;font-weight:600;
}
.btn--text i{transition:transform var(--t);}
.btn--text:hover{color:#3DF0C6;}
.btn--text:hover i{transform:translateX(3px);}
.btn--block{width:100%;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:148px 0 76px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(120,180,200,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,200,.06) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(720px 460px at 30% 20%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(720px 460px at 30% 20%,#000 0%,transparent 78%);
  opacity:.75;
  pointer-events:none;
  z-index:0;
}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  border-radius:var(--r-badge);
  border:1px solid rgba(23,227,180,.32);
  background:rgba(23,227,180,.08);
  color:var(--brand);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.06em;
}
.hero h1{
  margin-top:22px;
  font-size:clamp(32px,4.4vw,56px);
  line-height:1.15;
  font-weight:700;
  letter-spacing:-.01em;
}
.hero h1 span{color:var(--brand);}
.hero-sub{
  margin-top:22px;
  max-width:540px;
  font-size:17px;
  line-height:1.85;
  color:var(--muted);
}
.hero-actions{margin-top:34px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-metrics{
  margin-top:44px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.hero-metrics .num{
  font-size:24px;
  font-weight:700;
  color:var(--brand);
  letter-spacing:-.01em;
  font-family:"Inter",system-ui,sans-serif;
}
.hero-metrics .cap{font-size:12px;color:var(--weak);margin-top:2px;line-height:1.6;}
.hero-media{
  position:relative;
  border-radius:22px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-2);
  background:var(--glass-solid);
}
.hero-media img{width:100%;height:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,18,.10) 0%,rgba(6,10,18,.55) 100%);
  pointer-events:none;
}
.hero-badge{
  position:absolute;
  left:18px;bottom:18px;
  z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;
  border-radius:var(--r-badge);
  background:rgba(6,10,18,.82);
  border:1px solid var(--line-hi);
  font-size:12.5px;
  color:var(--text);
  backdrop-filter:blur(10px);
}
.hero-badge b{color:var(--amber);font-weight:600;}

/* ---------- stat strip ---------- */
.stat-strip{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  box-shadow:var(--sh-1);
  padding:30px 8px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
}
.stat-strip .stat{
  padding:0 26px;
  border-right:1px solid var(--line);
}
.stat-strip .stat:last-child{border-right:0;}
.stat-strip .stat-num{
  font-size:28px;font-weight:700;color:var(--brand);
  font-family:"Inter",system-ui,sans-serif;
  letter-spacing:-.01em;
  line-height:1.2;
}
.stat-strip .stat-cap{font-size:13px;color:var(--muted);margin-top:4px;}

/* ---------- section head ---------- */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:44px;
}
.section-head h2{
  font-size:clamp(26px,3vw,36px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  margin-top:14px;
}
.section-head p{
  margin-top:14px;
  max-width:640px;
  color:var(--muted);
  font-size:15.5px;
}

/* ---------- story ---------- */
.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.story-figure{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line-hi);
  box-shadow:0 0 0 1px rgba(23,227,180,.12),var(--sh-2);
}
.story-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.story-figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(6,10,18,0) 30%,rgba(6,10,18,.62) 100%);
}
.story-body h2{font-size:clamp(26px,3vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
.story-body p{margin-top:18px;color:var(--muted);font-size:15.5px;}
.story-list{margin-top:26px;display:grid;gap:12px;list-style:none;padding:0;}
.story-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text);}
.story-list i{color:var(--brand);margin-top:5px;font-size:13px;}
.story-body .btn--text{margin-top:28px;}

/* ---------- featured picks ---------- */
.pick-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:24px;}
.pick-side{display:grid;gap:24px;}
.card{
  position:relative;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
  display:flex;
  flex-direction:column;
}
.card:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--sh-2);}
.card__media{position:relative;overflow:hidden;}
.card__media img{width:100%;object-fit:cover;transition:transform var(--t);}
.card:hover .card__media img{transform:scale(1.04);}
.card__media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,18,.05) 40%,rgba(6,10,18,.72) 100%);
}
.card__body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card--hero .card__media img{aspect-ratio:16/10;}
.card--hero .card__body{padding:28px;}
.card--hero h3{font-size:24px;line-height:1.4;font-weight:600;}
.card--small .card__media img{aspect-ratio:16/9;}
.card--small h3{font-size:18px;line-height:1.45;font-weight:600;}
.card__excerpt{color:var(--muted);font-size:14.5px;line-height:1.75;}
.card__foot{
  margin-top:auto;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:6px;
}
.card__foot .go{color:var(--brand);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.card:hover .card__foot .go i{transform:translateX(3px);}
.card__foot .go i{transition:transform var(--t);}
.badge{
  display:inline-flex;align-items:center;
  padding:3px 10px;
  border-radius:var(--r-badge);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid rgba(23,227,180,.34);
  background:rgba(23,227,180,.08);
  color:var(--brand);
}
.badge--amber{
  border-color:rgba(255,177,90,.34);
  background:rgba(255,177,90,.08);
  color:var(--amber);
}
.badge--neutral{
  border-color:rgba(120,180,200,.22);
  background:rgba(120,180,200,.07);
  color:var(--muted);
}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}

/* ---------- cms post grid ---------- */
.post-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.post-card{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  box-shadow:var(--sh-1);
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:14px;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.post-card:hover{transform:translateY(-4px);border-color:var(--line-hi);box-shadow:var(--sh-2);}
.post-card__title{font-size:18px;line-height:1.5;font-weight:600;}
.post-card__title a:hover{color:var(--brand);}
.post-card__excerpt{font-size:14.5px;color:var(--muted);line-height:1.8;}
.post-card__foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--weak);
}
.post-card__foot .go{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.post-card__foot .go i{transition:transform var(--t);}
.post-card:hover .post-card__foot .go i{transform:translateX(3px);}
.post-card__time{color:var(--amber);font-size:12.5px;font-family:"Inter",system-ui,sans-serif;}

/* empty state */
.empty-state{
  grid-column:1/-1;
  text-align:center;
  padding:64px 24px;
  border:1px dashed var(--line);
  border-radius:var(--r-card);
  background:rgba(16,26,40,.4);
}
.empty-state i{font-size:48px;color:rgba(23,227,180,.4);}
.empty-state p{margin:16px 0 22px;color:var(--muted);font-size:15px;}

/* ---------- capability timeline ---------- */
.cap-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start;}
.cap-sticky{position:sticky;top:104px;}
.cap-sticky h2{font-size:clamp(26px,3vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
.cap-sticky p{margin-top:16px;color:var(--muted);font-size:15.5px;}
.cap-items{display:grid;gap:0;}
.cap-item{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:22px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
.cap-item:first-child{padding-top:0;}
.cap-item__num{
  font-family:"Inter",system-ui,sans-serif;
  font-size:26px;
  font-weight:700;
  color:rgba(23,227,180,.42);
  letter-spacing:-.02em;
  line-height:1.3;
}
.cap-item h3{font-size:21px;font-weight:600;line-height:1.4;}
.cap-item p{margin-top:8px;font-size:14.8px;color:var(--muted);line-height:1.8;}
.cap-item .tagline{
  display:inline-block;margin-top:10px;font-size:13px;color:var(--amber);
}

/* ---------- proof strip ---------- */
.proof-strip{
  display:grid;
  grid-template-columns:repeat(6,minmax(0,1fr));
  gap:16px;
}
.proof-item{
  border:1px solid var(--line);
  border-radius:14px;
  background:rgba(16,26,40,.4);
  padding:18px 14px;
  text-align:center;
  font-size:14px;
  color:var(--muted);
  opacity:.6;
  transition:opacity var(--t),border-color var(--t),transform var(--t);
}
.proof-item:hover{opacity:1;border-color:var(--line-hi);transform:translateY(-3px);}
.proof-item i{display:block;font-size:18px;color:var(--brand);margin-bottom:8px;}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;
  background:transparent;border:0;
  color:var(--text);
  font-size:18px;font-weight:600;
  text-align:left;
  cursor:pointer;
  line-height:1.55;
  transition:color var(--t);
}
.faq-q:hover{color:var(--brand);}
.faq-q .plus{
  flex:0 0 auto;
  width:26px;height:26px;
  position:relative;
  border-radius:50%;
  border:1px solid var(--line-hi);
  transition:transform var(--t),border-color var(--t);
}
.faq-q .plus::before,
.faq-q .plus::after{
  content:"";
  position:absolute;left:50%;top:50%;
  background:var(--brand);
  transform:translate(-50%,-50%);
  border-radius:2px;
}
.faq-q .plus::before{width:11px;height:1.5px;}
.faq-q .plus::after{width:1.5px;height:11px;transition:opacity var(--t);}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-item.is-open .plus{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 280ms var(--ease);
}
.faq-a p{
  padding:0 40px 22px 0;
  font-size:15px;
  line-height:1.9;
  color:var(--muted);
}
.faq-item.is-open .faq-a{max-height:400px;}

/* ---------- cta band ---------- */
.cta-band{
  border-radius:22px;
  border:1px solid var(--line-hi);
  background:
    radial-gradient(560px 260px at 88% 0%, rgba(23,227,180,.16), transparent 70%),
    var(--glass);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  box-shadow:var(--sh-2);
  padding:42px;
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:36px;
  align-items:center;
}
.cta-band h2{font-size:clamp(24px,2.6vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.01em;}
.cta-band p{margin-top:12px;color:var(--muted);font-size:15px;}
.cta-form{display:flex;gap:12px;flex-wrap:wrap;}
.field{flex:1 1 220px;display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13px;color:var(--muted);}
.field input{
  height:48px;
  width:100%;
  padding:0 16px;
  border-radius:var(--r-input);
  background:rgba(6,10,18,.6);
  border:1px solid var(--line);
  color:var(--text);
  font-size:15px;
  outline:none;
  transition:border-color var(--t),box-shadow var(--t);
}
.field input::placeholder{color:var(--weak);}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,227,180,.14);}
.cta-form .btn{flex:0 0 auto;}
.privacy-note{grid-column:1/-1;font-size:12.5px;color:var(--weak);margin-top:14px;}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:#04070D;
  padding:72px 0 0;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:56px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--muted);line-height:1.85;max-width:300px;}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  letter-spacing:.02em;
  margin-bottom:18px;
}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:11px;}
.footer-col a,.footer-col li{font-size:14px;color:var(--muted);line-height:1.7;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--weak);
}
.footer-bottom .to-top{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--muted);font-size:13px;
}
.footer-bottom .to-top:hover{color:var(--brand);}

/* ---------- responsive ---------- */
@media screen and (max-width:1023px){
  .section{padding:72px 0;}
  .hero{padding:120px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-sub{max-width:none;}
  .hero-media{order:2;}
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 0;padding:26px 8px;}
  .stat-strip .stat{border-right:0;padding:0 22px;}
  .story-grid{grid-template-columns:1fr;gap:36px;}
  .pick-grid{grid-template-columns:1fr;}
  .cap-grid{grid-template-columns:1fr;gap:32px;}
  .cap-sticky{position:static;}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .proof-strip{grid-template-columns:repeat(3,minmax(0,1fr));}
  .cta-band{grid-template-columns:1fr;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .nav-links,.nav-search,.nav-login{display:none;}
  .nav-toggle{display:inline-flex;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;}
}
@media screen and (max-width:767px){
  .nav-inner{height:60px;gap:12px;}
  .site-header{height:60px;}
  .brand__text{font-size:16px;}
  .hero{padding:100px 0 52px;}
  .hero h1{font-size:clamp(28px,8vw,34px);}
  .hero-sub{font-size:15px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .post-grid{grid-template-columns:1fr;}
  .proof-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;}
  .cta-band{padding:24px;}
  .cta-form{flex-direction:column;}
  .cta-form .btn{width:100%;}
  .faq-q{font-size:16px;}
  .faq-a p{padding-right:0;}
  .cap-item{grid-template-columns:48px 1fr;gap:16px;}
}
@media screen and (max-width:519px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .hero{padding:92px 0 44px;}
  .stat-strip{grid-template-columns:1fr;gap:20px;}
  .stat-strip .stat{padding:0 22px;border-bottom:1px solid var(--line);padding-bottom:18px;}
  .stat-strip .stat:last-child{border-bottom:0;padding-bottom:0;}
  .hero-metrics{grid-template-columns:1fr 1fr;}
  .proof-strip{grid-template-columns:1fr 1fr;}
  .card__body{padding:20px;}
  .post-card{padding:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
}

/* roulang page: category1 */
:root{
  --bg:#060A12;
  --bg-2:#0B1420;
  --bg-3:#08101B;
  --brand:#17E3B4;
  --brand-deep:#0FA98A;
  --amber:#FFB15A;
  --text:#EAF2FF;
  --text-2:#A9B8CC;
  --text-3:#6E7F95;
  --line:rgba(120,180,200,.14);
  --line-hi:rgba(23,227,180,.38);
  --glass:rgba(16,26,40,.55);
  --glass-solid:rgba(16,26,40,.94);
  --radius-card:18px;
  --radius-img:14px;
  --radius-input:12px;
  --radius-badge:8px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 18px 44px rgba(0,0,0,.5);
  --glow:0 0 26px rgba(23,227,180,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:220ms cubic-bezier(.2,.7,.3,1);
  --header-h:72px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--brand);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--brand-deep);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

/* ============ 通用组件 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t),color var(--t);
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);
  color:#04140F;
  box-shadow:var(--glow);
}
.btn-primary:hover{background:#2DF0C3;color:#04140F;box-shadow:0 0 34px rgba(23,227,180,.42);transform:translateY(-1px);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:transparent;
  color:var(--text);
  border-color:rgba(23,227,180,.35);
}
.btn-ghost:hover{background:rgba(23,227,180,.12);color:var(--text);border-color:rgba(23,227,180,.6);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--brand);font-weight:600;font-size:15px;
  background:none;border:0;padding:0;height:auto;
}
.btn-text i{transition:transform var(--t);}
.btn-text:hover i{transform:translateX(3px);}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.06em;
  border-radius:var(--radius-badge);
  border:1px solid rgba(23,227,180,.32);
  background:rgba(23,227,180,.08);
  color:var(--brand);
}
.badge--amber{border-color:rgba(255,177,90,.34);background:rgba(255,177,90,.1);color:var(--amber);}
.badge--muted{border-color:var(--line);background:rgba(120,180,200,.06);color:var(--text-2);}

.section{padding:96px 0;}
.section--alt{background:var(--bg-3);}
.section-head{margin-bottom:44px;max-width:760px;}
.section-head h2{
  font-size:clamp(26px,3vw,36px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.section-head p{color:var(--text-2);font-size:16px;line-height:1.85;}

.eyebrow{
  display:inline-block;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--brand);
  text-transform:uppercase;
  margin-bottom:14px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:var(--header-h);
  background:rgba(6,10,18,.55);
  border-bottom:1px solid transparent;
  transition:background var(--t),border-color var(--t),box-shadow var(--t);
}
.site-header.is-scrolled{
  background:rgba(8,16,27,.88);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  border-bottom-color:var(--line);
  box-shadow:0 8px 24px rgba(0,0,0,.35);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:26px;
  height:var(--header-h);
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:22px;height:22px;
  border-radius:7px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:var(--glow);
  position:relative;
  transform:rotate(45deg);
  flex-shrink:0;
}
.brand__mark::after{
  content:"";
  position:absolute;inset:6px;
  border-radius:2px;
  background:#04140F;
}
.brand__text{
  font-size:17px;
  font-weight:600;
  color:var(--text);
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand:hover .brand__text{color:var(--brand);}

.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  font-size:15px;
  font-weight:500;
  color:rgba(234,242,255,.72);
  border-radius:999px;
  transition:color var(--t),background var(--t);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;bottom:3px;
  width:0;height:2px;
  background:var(--brand);
  border-radius:2px;
  transform:translateX(-50%);
  transition:width var(--t);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:calc(100% - 28px);}
.nav-link.is-active{
  color:var(--text);
  background:rgba(23,227,180,.1);
  box-shadow:inset 0 0 0 1px rgba(23,227,180,.22);
}
.nav-link.is-active::after{width:calc(100% - 28px);}

.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.nav-search{
  position:relative;
  width:200px;
  flex-shrink:0;
}
.nav-search input{
  width:100%;
  height:38px;
  padding:0 14px 0 36px;
  font-size:13.5px;
  color:var(--text);
  background:rgba(16,26,40,.6);
  border:1px solid var(--line);
  border-radius:999px;
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search input:focus{
  outline:none;
  border-color:var(--line-hi);
  box-shadow:0 0 0 3px rgba(23,227,180,.12);
  background:rgba(16,26,40,.9);
}
.nav-search i{
  position:absolute;
  left:14px;top:50%;
  transform:translateY(-50%);
  font-size:13px;
  color:var(--text-3);
  pointer-events:none;
}
.nav-login{
  font-size:14.5px;
  font-weight:500;
  color:rgba(234,242,255,.75);
  white-space:nowrap;
}
.nav-login:hover{color:var(--brand);}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  align-items:center;justify-content:center;
  background:rgba(16,26,40,.6);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--text);
  font-size:16px;
  cursor:pointer;
}

/* 移动抽屉 */
.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:min(84vw,340px);
  background:var(--glass-solid);
  border-left:1px solid var(--line);
  padding:22px 20px 32px;
  transform:translateX(102%);
  transition:transform 280ms var(--ease);
  z-index:200;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer__close{
  width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:transparent;color:var(--text);
  font-size:16px;cursor:pointer;
}
.drawer a.drawer__link{
  display:block;
  font-size:17px;
  line-height:52px;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer a.drawer__link.is-active{color:var(--brand);}
.drawer__foot{margin-top:24px;display:grid;gap:12px;}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(3,6,12,.66);
  opacity:0;visibility:hidden;
  transition:opacity var(--t),visibility var(--t);
  z-index:150;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ============ 页头 ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:56px 0 64px;
  background:
    radial-gradient(760px 420px at 82% -12%,rgba(23,227,180,.16),transparent 62%),
    radial-gradient(520px 320px at 6% 8%,rgba(255,177,90,.08),transparent 60%),
    linear-gradient(180deg,#060A12,#08101B);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.14;
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,180,200,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(120,180,200,.055) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.5;
  pointer-events:none;
  mask-image:radial-gradient(circle at 50% 20%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 20%,#000 20%,transparent 78%);
}
.page-hero .container{position:relative;z-index:2;}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;
  color:var(--text-3);
  margin-bottom:26px;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb span.sep{opacity:.55;}
.breadcrumb span.current{color:var(--text);}

.hero-grid{display:flex;flex-wrap:wrap;gap:48px;align-items:center;}
.hero-copy{flex:1 1 480px;min-width:280px;}
.hero-copy h1{
  font-size:clamp(34px,4.6vw,56px);
  line-height:1.15;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.hero-copy h1 em{
  font-style:normal;
  color:var(--brand);
}
.hero-sub{
  font-size:17px;
  line-height:1.85;
  color:var(--text-2);
  max-width:560px;
  margin-bottom:24px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}

.hero-figure{
  flex:1 1 380px;
  min-width:260px;
  position:relative;
}
.hero-figure .frame{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line-hi);
  box-shadow:var(--shadow-2),0 0 40px rgba(23,227,180,.16);
  background:linear-gradient(140deg,rgba(23,227,180,.22),rgba(16,26,40,.9));
  aspect-ratio:16/11;
}
.hero-figure img{
  width:100%;height:100%;
  object-fit:cover;
  border-radius:0;
}
.hero-figure .frame::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,18,.15),rgba(6,10,18,.72));
}
.hero-figure .figure-note{
  position:absolute;
  left:18px;right:18px;bottom:16px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;
  color:var(--text-2);
  z-index:3;
}
.hero-figure .figure-note strong{color:var(--text);font-weight:600;}

/* ============ 锚点条 ============ */
.anchor-bar{
  position:sticky;
  top:var(--header-h);
  z-index:60;
  background:rgba(8,16,27,.9);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.anchor-bar .container{
  display:flex;align-items:center;gap:10px;
  padding-top:12px;padding-bottom:12px;
  overflow-x:auto;
  scrollbar-width:none;
}
.anchor-bar .container::-webkit-scrollbar{display:none;}
.anchor-pill{
  flex:0 0 auto;
  display:inline-block;
  padding:8px 16px;
  font-size:13.5px;
  font-weight:500;
  color:var(--text-2);
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(16,26,40,.5);
  transition:color var(--t),border-color var(--t),background var(--t);
  white-space:nowrap;
}
.anchor-pill:hover{color:var(--text);border-color:var(--line-hi);background:rgba(23,227,180,.1);}

/* ============ 大图 + 要点 ============ */
.split{
  display:flex;
  flex-wrap:wrap;
  gap:40px;
  align-items:center;
}
.split__media{flex:1 1 460px;min-width:280px;}
.split__media .media-box{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  background:linear-gradient(140deg,rgba(23,227,180,.2),rgba(16,26,40,.95));
  aspect-ratio:4/3;
}
.split__media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.split__body{flex:1 1 420px;min-width:280px;}
.split__body h2{
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:16px;
}
.split__body > p{color:var(--text-2);margin-bottom:26px;}

.point-list{display:grid;gap:14px;}
.point-item{
  display:flex;
  gap:14px;
  padding:18px 20px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
@supports not ((backdrop-filter:blur(18px)) or (-webkit-backdrop-filter:blur(18px))){
  .point-item{background:var(--glass-solid);}
  .module-card{background:var(--glass-solid);}
  .terminal-card{background:var(--glass-solid);}
  .cta-card{background:var(--glass-solid);}
  .faq-wrap{background:var(--glass-solid);}
}
.point-item:hover{
  transform:translateY(-3px);
  border-color:var(--line-hi);
  box-shadow:var(--shadow-2);
}
.point-item .idx{
  flex:0 0 30px;
  width:30px;height:30px;
  display:flex;align-items:center;justify-content:center;
  border-radius:9px;
  font-size:13px;font-weight:700;
  color:#04140F;
  background:var(--brand);
}
.point-item h3{font-size:17px;font-weight:600;margin-bottom:4px;}
.point-item p{font-size:14.5px;line-height:1.75;color:var(--text-2);}

/* ============ 模块卡网格 ============ */
.module-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.module-card{
  position:relative;
  padding:26px 26px 24px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
  display:flex;
  flex-direction:column;
  gap:12px;
}
.module-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-hi);
  box-shadow:var(--shadow-2);
}
.module-card__top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.module-card__icon{
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  color:var(--brand);
  font-size:16px;
  background:rgba(23,227,180,.1);
  border:1px solid rgba(23,227,180,.24);
}
.module-card h3{font-size:19px;font-weight:600;line-height:1.4;}
.module-card p{font-size:14.8px;line-height:1.8;color:var(--text-2);flex:1;}
.module-card .meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}

/* ============ 终端横带（非对称） ============ */
.terminal-band{
  display:grid;
  grid-template-columns:1.35fr 1fr .82fr;
  gap:24px;
  align-items:stretch;
}
.terminal-card{
  position:relative;
  overflow:hidden;
  padding:26px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
  display:flex;
  flex-direction:column;
  gap:14px;
  min-height:220px;
}
.terminal-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-hi);
  box-shadow:var(--shadow-2);
}
.terminal-card--lead{
  background:
    linear-gradient(150deg,rgba(23,227,180,.14),rgba(16,26,40,.72) 55%),
    var(--glass);
  border-color:rgba(23,227,180,.26);
}
.terminal-card h3{font-size:21px;font-weight:600;}
.terminal-card p{font-size:14.5px;line-height:1.78;color:var(--text-2);flex:1;}
.terminal-card .term-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;letter-spacing:.06em;
  color:var(--amber);
}

/* ============ 参数表 ============ */
.spec-table{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:rgba(11,20,32,.6);
}
.spec-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px 24px;
  padding:18px 24px;
  border-bottom:1px solid var(--line);
  transition:background var(--t);
}
.spec-row:last-child{border-bottom:0;}
.spec-row:hover{background:rgba(23,227,180,.05);}
.spec-row dt{
  flex:0 0 168px;
  font-size:14px;
  font-weight:600;
  color:var(--text);
}
.spec-row dd{
  flex:1 1 280px;
  margin:0;
  font-size:14.5px;
  color:var(--text-2);
}

/* ============ 数据条 ============ */
.stat-band{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
}
.stat-cell{
  background:rgba(11,20,32,.92);
  padding:26px 24px;
}
.stat-cell .num{
  font-size:28px;
  font-weight:700;
  color:var(--brand);
  line-height:1.2;
  letter-spacing:-.01em;
}
.stat-cell .num small{font-size:14px;font-weight:600;color:var(--text-2);margin-left:4px;}
.stat-cell .cap{font-size:13px;color:var(--text-3);margin-top:6px;}

/* ============ FAQ ============ */
.faq-wrap{
  padding:8px 28px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
}
.accordion{background:transparent;border:0;margin:0;}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.accordion-item:last-child{border-bottom:0;}
.accordion-title{
  position:relative;
  display:block;
  padding:22px 46px 22px 0;
  font-size:18px;
  font-weight:600;
  line-height:1.5;
  color:var(--text);
  background:transparent;
  border:0;
  transition:color var(--t);
}
.accordion-title:hover{color:var(--brand);}
.accordion-title::before{
  content:"";
  position:absolute;
  right:20px;top:50%;
  width:14px;height:2px;
  margin:0;
  background:var(--brand);
  border-radius:2px;
  transform:translateY(-50%);
  color:transparent;
}
.accordion-title::after{
  content:"";
  position:absolute;
  right:26px;top:50%;
  width:2px;height:14px;
  background:var(--brand);
  border-radius:2px;
  transform:translateY(-50%);
  transition:transform var(--t),opacity var(--t);
}
.accordion-item.is-active > .accordion-title::after{
  transform:translateY(-50%) rotate(90deg);
  opacity:0;
}
.accordion-content{
  padding:0 0 24px;
  background:transparent;
  border:0;
  color:var(--text-2);
  font-size:15px;
  line-height:1.9;
}
.accordion-content p{margin-bottom:10px;}
.accordion-content p:last-child{margin-bottom:0;}

/* ============ CTA ============ */
.cta-section{padding:80px 0 96px;}
.cta-card{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:32px;
  padding:38px 40px;
  border-radius:22px;
  background:
    radial-gradient(620px 300px at 88% 0%,rgba(23,227,180,.18),transparent 62%),
    rgba(16,26,40,.72);
  border:1px solid var(--line-hi);
  box-shadow:var(--shadow-1),0 0 40px rgba(23,227,180,.1);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
}
.cta-card__copy{flex:1 1 380px;min-width:260px;}
.cta-card__copy h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3;margin-bottom:10px;}
.cta-card__copy p{font-size:14.8px;color:var(--text-2);}
.cta-form{flex:1 1 340px;min-width:260px;}
.form-row{display:flex;gap:12px;flex-wrap:wrap;}
.form-field{flex:1 1 190px;min-width:160px;}
.form-field label{
  display:block;
  font-size:13px;
  color:var(--text-2);
  margin-bottom:7px;
}
.form-field input{
  width:100%;
  height:48px;
  padding:0 16px;
  font-size:14.5px;
  color:var(--text);
  background:rgba(6,10,18,.72);
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  transition:border-color var(--t),box-shadow var(--t);
}
.form-field input::placeholder{color:var(--text-3);}
.form-field input:focus{
  outline:none;
  border-color:var(--line-hi);
  box-shadow:0 0 0 3px rgba(23,227,180,.14);
}
.form-note{
  margin-top:12px;
  font-size:12.5px;
  color:var(--text-3);
  line-height:1.7;
}
.form-note.is-ok{color:var(--brand);}

/* ============ 页脚 ============ */
.site-footer{
  background:#04070D;
  border-top:1px solid var(--line);
  padding:64px 0 28px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{
  font-size:14px;
  line-height:1.85;
  color:var(--text-3);
  max-width:340px;
}
.footer-col h4{
  font-size:14.5px;
  font-weight:600;
  color:var(--text);
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{
  font-size:14px;
  color:var(--text-3);
  line-height:1.7;
}
.footer-col a{color:var(--text-3);font-size:14px;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-top:22px;
  font-size:13px;
  color:var(--text-3);
}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  color:var(--text-2);
  padding:8px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  transition:color var(--t),border-color var(--t),background var(--t);
}
.to-top:hover{color:var(--brand);border-color:var(--line-hi);background:rgba(23,227,180,.08);}

.reveal-fade{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal-fade.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  :root{--header-h:64px;}
  .nav-search{width:160px;}
  .nav-links{gap:0;}
  .nav-link{padding:9px 10px;font-size:14px;}
  .section{padding:72px 0;}
  .terminal-band{grid-template-columns:1fr 1fr;}
  .terminal-card--lead{grid-column:1/-1;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .stat-band{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:899px){
  .nav-links,.nav-search,.nav-login{display:none;}
  .nav-toggle{display:flex;}
  .nav-right{margin-left:auto;}
}

@media (max-width:767px){
  :root{--header-h:60px;}
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  body{font-size:15px;line-height:1.8;}
  .hero-copy h1{font-size:clamp(32px,8.4vw,36px);}
  .hero-copy h1{line-height:1.2;}
  .hero-sub{font-size:15.5px;}
  .hero-grid{gap:32px;}
  .hero-figure{order:2;flex:1 1 100%;}
  .hero-copy{order:1;flex:1 1 100%;}
  .hero-actions .btn{flex:1 1 100%;}
  .module-grid{grid-template-columns:1fr;}
  .terminal-band{grid-template-columns:1fr;}
  .section-head h2{font-size:26px;}
  .split__body h2{font-size:26px;}
  .spec-row{padding:16px 18px;}
  .spec-row dt{flex:1 1 100%;}
  .cta-card{padding:26px 22px;}
  .cta-form,.form-field{flex:1 1 100%;}
  .form-row .btn{width:100%;}
  .faq-wrap{padding:4px 18px;}
  .accordion-title{font-size:16.5px;padding:18px 40px 18px 0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .anchor-bar{top:var(--header-h);}
}

@media (max-width:519px){
  .stat-band{grid-template-columns:1fr;}
  .stat-cell{padding:20px;}
  .brand__text{font-size:16px;}
  .hero-tags .badge{font-size:12px;}
}

/* roulang page: article */
:root{
  --bg:#060A12;
  --bg-2:#0B1420;
  --bg-3:#08101B;
  --brand:#17E3B4;
  --brand-deep:#0FA98A;
  --amber:#FFB15A;
  --text:#EAF2FF;
  --text-2:#A9B8CC;
  --text-3:#6E7F95;
  --line:rgba(120,180,200,0.14);
  --line-strong:rgba(23,227,180,0.38);
  --glass:rgba(16,26,40,0.55);
  --glass-solid:rgba(16,26,40,0.92);
  --btn-text:#04140F;
  --r-card:18px;
  --r-img:14px;
  --r-btn:999px;
  --r-input:12px;
  --r-badge:8px;
  --sh-1:0 10px 30px rgba(0,0,0,.35);
  --sh-2:0 18px 44px rgba(0,0,0,.5);
  --glow:0 0 26px rgba(23,227,180,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:220ms var(--ease);
  --max:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color var(--t);}
a:hover,a:focus{color:var(--brand);}
button{font-family:inherit;}
h1,h2,h3,h4,h5,h6{margin:0;color:var(--text);font-weight:700;line-height:1.25;letter-spacing:-0.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
figure{margin:0;}
::selection{background:rgba(23,227,180,.28);color:#fff;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

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

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t),background var(--t),color var(--t);
  white-space:nowrap;
}
.btn--primary{
  background:var(--brand);color:var(--btn-text);
  box-shadow:var(--glow);
}
.btn--primary:hover{
  background:#25f0c2;color:var(--btn-text);
  box-shadow:0 0 34px rgba(23,227,180,.45);
  transform:translateY(-1px);
}
.btn--primary:active{transform:scale(.98);}
.btn--ghost{
  background:transparent;color:var(--text);
  border-color:rgba(23,227,180,.35);
}
.btn--ghost:hover{
  background:rgba(23,227,180,.12);color:var(--text);
  border-color:rgba(23,227,180,.6);
}
.btn--block{display:flex;width:100%;}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:15px;
}
.text-link i{transition:transform var(--t);font-size:13px;}
.text-link:hover i{transform:translateX(3px);}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background var(--t),border-color var(--t);
}
.site-header.is-scrolled{
  background:rgba(6,10,18,.9);
  border-bottom-color:var(--line);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:72px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:22px;height:22px;border-radius:7px;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:var(--glow);
  position:relative;
}
.brand__mark::after{
  content:"";position:absolute;inset:6px;border-radius:3px;
  background:rgba(6,10,18,.75);
}
.brand__text{
  font-size:17px;font-weight:600;color:var(--text);letter-spacing:.01em;white-space:nowrap;
}
.nav-links{
  display:flex;align-items:center;gap:4px;
  flex:1;justify-content:center;
}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:38px;padding:0 14px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;color:rgba(234,242,255,.7);
  transition:color var(--t),background var(--t);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:2px;width:0;height:2px;
  background:var(--brand);border-radius:2px;transform:translateX(-50%);
  transition:width var(--t);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{
  color:var(--text);
  background:rgba(23,227,180,.1);
}
.nav-link.is-active::after{width:60%;}
.nav-right{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.nav-search{
  position:relative;display:flex;align-items:center;
  width:200px;height:38px;border-radius:var(--r-btn);
  background:rgba(16,26,40,.55);
  border:1px solid var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-search:focus-within{
  border-color:rgba(23,227,180,.5);
  box-shadow:0 0 0 3px rgba(23,227,180,.1);
}
.nav-search i{
  position:absolute;left:14px;font-size:13px;color:var(--text-3);pointer-events:none;
}
.nav-search input{
  width:100%;height:100%;border:0;background:transparent;color:var(--text);
  font-size:14px;padding:0 14px 0 36px;outline:none;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-login{
  font-size:15px;font-weight:500;color:rgba(234,242,255,.8);
  padding:8px 4px;
}
.nav-login:hover{color:var(--brand);}
.nav-cta{height:40px;padding:0 20px;font-size:14px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;flex-shrink:0;
  background:rgba(16,26,40,.55);border:1px solid var(--line);
  color:var(--text);font-size:17px;cursor:pointer;
}
.nav-toggle:hover{border-color:rgba(23,227,180,.4);}

/* mobile drawer */
.mobile-drawer{
  position:fixed;inset:0;z-index:90;display:none;
  background:rgba(4,7,12,.6);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer__panel{
  position:absolute;top:0;right:0;width:min(320px,86vw);height:100%;
  background:var(--bg-2);border-left:1px solid var(--line);
  padding:20px;display:flex;flex-direction:column;gap:18px;
  box-shadow:-20px 0 60px rgba(0,0,0,.5);
  animation:drawerIn .28s var(--ease);
}
@keyframes drawerIn{from{transform:translateX(24px);opacity:.4}to{transform:translateX(0);opacity:1}}
.mobile-drawer__head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:transparent;color:var(--text-2);font-size:16px;cursor:pointer;
}
.mobile-drawer__nav{display:flex;flex-direction:column;}
.mobile-drawer__nav a{
  display:flex;align-items:center;height:52px;font-size:17px;
  color:var(--text-2);border-bottom:1px solid var(--line);
}
.mobile-drawer__nav a:hover,.mobile-drawer__nav a.is-active{color:var(--brand);}
.mobile-drawer__foot{display:flex;flex-direction:column;gap:12px;margin-top:auto;}
.mobile-drawer__search{position:relative;display:flex;align-items:center;height:44px;border-radius:12px;border:1px solid var(--line);background:rgba(16,26,40,.6);}
.mobile-drawer__search i{position:absolute;left:14px;color:var(--text-3);font-size:13px;}
.mobile-drawer__search input{width:100%;height:100%;background:transparent;border:0;outline:none;color:var(--text);padding:0 14px 0 36px;font-size:14px;}

/* ============ Breadcrumb ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:28px 0 0;
  font-size:13.5px;color:var(--text-3);
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:rgba(110,127,149,.6);}
.breadcrumb .current{color:var(--text-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ Article head ============ */
.article-hero{
  position:relative;
  padding:26px 0 0;
  overflow:hidden;
}
.article-hero::before{
  content:"";position:absolute;top:-160px;right:-80px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(23,227,180,.16),transparent 65%);
  pointer-events:none;z-index:0;
}
.article-hero::after{
  content:"";position:absolute;top:40px;left:-120px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(255,177,90,.07),transparent 65%);
  pointer-events:none;z-index:0;
}
.article-head{position:relative;z-index:1;padding:18px 0 30px;}
.head-badges{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-badge);
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  border:1px solid transparent;
}
.badge--brand{color:var(--brand);background:rgba(23,227,180,.08);border-color:rgba(23,227,180,.3);}
.badge--amber{color:var(--amber);background:rgba(255,177,90,.08);border-color:rgba(255,177,90,.28);}
.badge--muted{color:var(--text-2);background:rgba(120,180,200,.06);border-color:var(--line);}
.article-title{
  font-size:clamp(30px,4.2vw,44px);
  line-height:1.2;font-weight:700;letter-spacing:-0.01em;
  margin:0 0 20px;
  max-width:920px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-size:14px;color:var(--text-3);
  padding-bottom:24px;border-bottom:1px solid var(--line);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{font-size:13px;color:rgba(23,227,180,.75);}

/* ============ Layout ============ */
.article-layout{margin-top:36px;}
.article-layout.grid-margin-x{margin-left:-12px;margin-right:-12px;}
.article-layout.grid-margin-x > .cell{padding-left:12px;padding-right:12px;}
.article-main{min-width:0;}
.article-body{
  max-width:760px;
  font-size:16px;line-height:1.9;color:var(--text-2);
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  margin:40px 0 16px;padding-left:14px;
  font-size:28px;line-height:1.35;font-weight:700;color:var(--text);
  border-left:3px solid var(--brand);
}
.article-body h3{
  margin:32px 0 12px;font-size:21px;font-weight:600;color:var(--text);
}
.article-body h4{
  margin:24px 0 10px;font-size:18px;font-weight:600;color:var(--text);
}
.article-body p{margin:0 0 20px;}
.article-body strong{color:var(--text);font-weight:600;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:24px;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:9px;padding-left:2px;}
.article-body li::marker{color:rgba(23,227,180,.75);}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;
  border-left:3px solid var(--brand);
  background:var(--glass);border-radius:0 12px 12px 0;
  color:var(--text);font-size:17px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body img{border-radius:var(--r-img);margin:20px 0 8px;width:auto;max-width:100%;height:auto;}
.article-body figure{margin:20px 0;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-3);margin-top:6px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;
  border:1px solid var(--line);border-radius:10px;overflow:hidden;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-body thead th{background:rgba(23,227,180,.08);color:var(--text);font-weight:600;}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.02);}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}
.article-tags{
  display:flex;flex-wrap:wrap;gap:10px;margin:36px 0 0;
  padding-top:24px;border-top:1px solid var(--line);
}
.tag-pill{
  display:inline-flex;align-items:center;
  height:32px;padding:0 14px;border-radius:var(--r-btn);
  font-size:13px;color:var(--text-2);
  border:1px solid var(--line);background:rgba(16,26,40,.5);
  transition:border-color var(--t),color var(--t),background var(--t);
}
.tag-pill:hover{color:var(--brand);border-color:rgba(23,227,180,.45);background:rgba(23,227,180,.08);}

/* empty state */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;padding:64px 24px;text-align:center;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  max-width:760px;
}
.empty-state i{font-size:44px;color:rgba(23,227,180,.4);}
.empty-state p{font-size:16px;color:var(--text-2);}

/* ============ Sidebar ============ */
.article-side{padding-top:8px;}
.side-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  padding:22px;
  margin-bottom:20px;
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
}
.side-card__title{
  font-size:15px;font-weight:600;color:var(--text);
  display:flex;align-items:center;gap:8px;margin-bottom:16px;
}
.side-card__title i{color:var(--brand);font-size:13px;}
.info-list{display:flex;flex-direction:column;gap:12px;}
.info-list li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13.5px;color:var(--text-3);
}
.info-list li b{color:var(--text-2);font-weight:600;}
.info-list .tag-mini{
  display:inline-flex;height:26px;padding:0 10px;border-radius:8px;
  background:rgba(23,227,180,.08);color:var(--brand);
  border:1px solid rgba(23,227,180,.28);font-size:12px;font-weight:600;align-items:center;
}
.related-mini{display:flex;flex-direction:column;gap:14px;}
.related-mini a{
  display:flex;gap:12px;align-items:flex-start;
  padding-bottom:14px;border-bottom:1px solid var(--line);
}
.related-mini a:last-child{border-bottom:0;padding-bottom:0;}
.related-mini .thumb{
  width:64px;height:56px;border-radius:10px;overflow:hidden;flex-shrink:0;
  background:linear-gradient(135deg,rgba(23,227,180,.22),rgba(15,169,138,.08));
}
.related-mini .thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.related-mini a:hover .thumb img{transform:scale(1.06);}
.related-mini .rt{font-size:14px;line-height:1.5;color:var(--text-2);font-weight:500;transition:color var(--t);}
.related-mini a:hover .rt{color:var(--brand);}
.side-cta{
  background:linear-gradient(150deg,rgba(23,227,180,.14),rgba(16,26,40,.7));
  border:1px solid rgba(23,227,180,.32);
  border-radius:var(--r-card);
  padding:22px;margin-bottom:20px;
}
.side-cta h4{font-size:17px;margin-bottom:8px;}
.side-cta p{font-size:13.5px;color:var(--text-2);margin-bottom:16px;line-height:1.7;}
.side-back{
  display:flex;align-items:center;justify-content:center;gap:8px;
  width:100%;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);color:var(--text-2);
  font-size:14px;font-weight:600;background:transparent;
  transition:border-color var(--t),color var(--t);
}
.side-back:hover{border-color:rgba(23,227,180,.45);color:var(--brand);}

/* ============ Related grid ============ */
.related-section{
  margin-top:72px;padding-top:56px;border-top:1px solid var(--line);
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:32px;flex-wrap:wrap;
}
.section-head h2{font-size:clamp(24px,3vw,32px);line-height:1.3;}
.section-head p{font-size:14px;color:var(--text-3);margin-top:8px;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rc-card{
  display:flex;flex-direction:column;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.rc-card:hover{transform:translateY(-4px);border-color:rgba(23,227,180,.4);box-shadow:var(--sh-2);}
.rc-card__media{
  position:relative;aspect-ratio:16/10;overflow:hidden;
  background:linear-gradient(135deg,rgba(23,227,180,.2),rgba(15,169,138,.06));
}
.rc-card__media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.rc-card:hover .rc-card__media img{transform:scale(1.04);}
.rc-card__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rc-card__body h3{font-size:17px;line-height:1.45;font-weight:600;}
.rc-card__body p{font-size:14px;color:var(--text-3);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rc-card__foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--text-3);padding-top:4px;
}
.rc-card__foot .arrow{color:var(--brand);font-size:12px;transition:transform var(--t);}
.rc-card:hover .rc-card__foot .arrow{transform:translateX(3px);}

/* ============ CTA band ============ */
.cta-section{padding:80px 0 0;}
.cta-band{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.15fr 1fr;gap:32px;align-items:center;
  padding:40px;border-radius:22px;
  background:linear-gradient(140deg,rgba(23,227,180,.14),rgba(16,26,40,.85) 55%);
  border:1px solid rgba(23,227,180,.28);
  box-shadow:var(--sh-1);
}
.cta-band::before{
  content:"";position:absolute;top:-100px;right:-60px;width:340px;height:340px;
  background:radial-gradient(circle,rgba(23,227,180,.22),transparent 65%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(24px,3vw,30px);margin-bottom:10px;}
.cta-band p{font-size:14.5px;color:var(--text-2);line-height:1.75;max-width:460px;}
.cta-form{display:flex;gap:12px;position:relative;z-index:1;}
.cta-form input{
  flex:1;height:48px;border-radius:var(--r-input);
  background:rgba(6,10,18,.6);border:1px solid var(--line);
  color:var(--text);font-size:14px;padding:0 16px;outline:none;
  transition:border-color var(--t),box-shadow var(--t);
}
.cta-form input::placeholder{color:var(--text-3);}
.cta-form input:focus{border-color:rgba(23,227,180,.55);box-shadow:0 0 0 3px rgba(23,227,180,.12);}
.cta-note{font-size:12.5px;color:var(--text-3);margin-top:12px;}

/* ============ Footer ============ */
.site-footer{
  margin-top:96px;
  background:#04070C;
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{font-size:13.5px;line-height:1.85;color:var(--text-3);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:18px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col li{font-size:13.5px;color:var(--text-3);line-height:1.6;}
.footer-col a{color:var(--text-3);font-size:13.5px;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:7px;color:var(--text-3);font-size:13px;}
.to-top:hover{color:var(--brand);}
.to-top i{font-size:11px;}

/* ============ Responsive ============ */
@media screen and (max-width:1023px){
  .nav-links{gap:0;}
  .nav-link{padding:0 10px;font-size:14px;}
  .nav-search{width:150px;}
  .nav-login{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .cta-band{grid-template-columns:1fr;padding:32px;}
  .footer-desc{max-width:100%;}
}
@media screen and (max-width:900px){
  .nav-search{display:none;}
}
@media screen and (max-width:767px){
  .container{padding:0 20px;}
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-cta{display:none;}
  .nav-wrap{height:60px;}
  .brand__text{font-size:16px;}
  .breadcrumb{padding-top:20px;font-size:12.5px;}
  .article-title{font-size:30px;line-height:1.28;}
  .article-meta{font-size:13px;gap:8px 16px;}
  .article-body{font-size:15px;line-height:1.8;}
  .article-body h2{font-size:23px;margin-top:32px;}
  .article-body h3{font-size:19px;margin-top:24px;}
  .article-body blockquote{font-size:15.5px;padding:16px 18px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .article-layout{margin-top:24px;}
  .article-side{padding-top:28px;}
  .related-section{margin-top:52px;padding-top:40px;}
  .related-grid{grid-template-columns:1fr;gap:16px;}
  .section-head{margin-bottom:24px;}
  .cta-section{padding-top:56px;}
  .cta-band{padding:26px 22px;gap:22px;}
  .cta-form{flex-direction:column;}
  .cta-form .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .site-footer{margin-top:64px;padding-top:44px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;}
  .side-card,.side-cta{padding:18px;}
}
@media screen and (max-width:520px){
  .article-title{font-size:26px;}
  .head-badges{gap:8px;}
  .badge{font-size:11.5px;padding:4px 10px;}
}

/* roulang page: category3 */
:root{
  --bg:#060A12;
  --surface:#0B1420;
  --surface-alt:#08101B;
  --glass:rgba(16,26,40,.55);
  --glass-solid:rgba(16,26,40,.92);
  --mint:#17E3B4;
  --mint-deep:#0FA98A;
  --amber:#FFB15A;
  --text:#EAF2FF;
  --text-sub:#A9B8CC;
  --text-weak:#6E7F95;
  --border:rgba(120,180,200,.14);
  --border-hi:rgba(23,227,180,.38);
  --on-mint:#04140F;
  --radius-card:18px;
  --radius-img:14px;
  --radius-btn:999px;
  --radius-input:12px;
  --radius-badge:8px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 18px 44px rgba(0,0,0,.5);
  --glow:0 0 26px rgba(23,227,180,.28);
  --ease:220ms cubic-bezier(.2,.7,.3,1);
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--mint);text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease)}
a:hover{color:#5df3d0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em;font-weight:700;color:var(--text)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding-top:var(--sp-9);padding-bottom:var(--sp-9)}
.section--alt{background:var(--surface-alt)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.06em;
  color:var(--mint);text-transform:uppercase;
  padding:6px 12px;border:1px solid var(--border-hi);border-radius:var(--radius-badge);
  background:rgba(23,227,180,.08);
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:var(--sp-6)}
.section-head h2{font-size:36px}
.section-head p{color:var(--text-sub);font-size:15px;margin-top:10px;max-width:640px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease),color var(--ease),filter var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--mint);color:var(--on-mint);box-shadow:var(--glow)}
.btn--primary:hover{filter:brightness(1.08);box-shadow:0 0 34px rgba(23,227,180,.42);color:var(--on-mint)}
.btn--primary:active{transform:scale(.98)}
.btn--ghost{background:transparent;border-color:rgba(23,227,180,.35);color:var(--text)}
.btn--ghost:hover{background:rgba(23,227,180,.12);border-color:var(--border-hi);color:var(--text)}
.btn--ghost:active{transform:scale(.98)}
.btn--sm{height:38px;padding:0 18px;font-size:14px}
.btn--block{width:100%}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease);
}
.site-header.is-scrolled{background:rgba(6,10,18,.94);border-bottom-color:var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);flex-shrink:0}
.brand:hover{color:var(--text)}
.brand__mark{
  width:22px;height:22px;border-radius:7px;flex-shrink:0;
  background:linear-gradient(135deg,var(--mint) 0%,var(--mint-deep) 100%);
  box-shadow:0 0 14px rgba(23,227,180,.55);
  position:relative;transform:rotate(0deg);
}
.brand__mark::after{
  content:"";position:absolute;inset:6px;border-radius:3px;
  background:rgba(4,20,15,.85);
}
.brand__text{font-size:17px;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;
  font-size:15px;font-weight:500;color:rgba(234,242,255,.7);border-radius:var(--radius-btn);
  transition:color var(--ease),background var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:2px;width:0;height:2px;border-radius:2px;
  background:var(--mint);transform:translateX(-50%);
  transition:width var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:22px}
.nav-link.is-active{color:var(--text);background:rgba(23,227,180,.1)}
.nav-link.is-active::after{width:22px}
.header-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.nav-search{
  display:flex;align-items:center;gap:8px;height:38px;width:200px;padding:0 14px;
  background:rgba(16,26,40,.72);border:1px solid var(--border);border-radius:var(--radius-btn);
  transition:border-color var(--ease),background var(--ease);
}
.nav-search:focus-within{border-color:var(--border-hi);background:rgba(16,26,40,.95)}
.nav-search i{color:var(--text-weak);font-size:13px}
.nav-search input{
  flex:1;min-width:0;background:transparent;border:none;outline:none;
  color:var(--text);font-size:13.5px;height:100%;
}
.nav-search input::placeholder{color:var(--text-weak)}
.link-login{font-size:14.5px;color:var(--text-sub);font-weight:500}
.link-login:hover{color:var(--mint)}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background:rgba(16,26,40,.72);border:1px solid var(--border);color:var(--text);
  cursor:pointer;
}
.menu-toggle:hover{border-color:var(--border-hi);color:var(--mint)}
.search-icon-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background:rgba(16,26,40,.72);border:1px solid var(--border);color:var(--text-sub);
  cursor:pointer;
}

/* ===== Page head ===== */
.page-head{
  position:relative;overflow:hidden;
  padding:56px 0 48px;
  background:
    radial-gradient(circle at 82% 18%,rgba(23,227,180,.16),transparent 46%),
    radial-gradient(circle at 8% 88%,rgba(255,177,90,.08),transparent 42%),
    linear-gradient(180deg,#08101B 0%,#060A12 100%);
  border-bottom:1px solid var(--border);
}
.page-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,180,200,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(120,180,200,.055) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.6;
}
.page-head .container{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-weak);margin-bottom:22px}
.crumbs a{color:var(--text-weak)}
.crumbs a:hover{color:var(--mint)}
.crumbs span.sep{color:rgba(110,127,149,.6)}
.crumbs .current{color:var(--text)}
.head-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:48px;align-items:end}
.page-head h1{font-size:52px;line-height:1.15;margin:16px 0 18px;letter-spacing:-.01em}
.page-head h1 em{font-style:normal;color:var(--mint)}
.head-lead{font-size:16px;color:var(--text-sub);max-width:620px;line-height:1.85}
.head-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.stat-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:18px 16px;backdrop-filter:blur(18px) saturate(120%);
}
.stat-card b{display:block;font-size:26px;font-weight:700;color:var(--mint);line-height:1.2;font-variant-numeric:tabular-nums}
.stat-card small{display:block;font-size:12.5px;color:var(--text-weak);margin-top:6px;letter-spacing:.02em}

/* ===== Anchor bar ===== */
.anchor-bar{
  position:sticky;top:72px;z-index:50;
  background:rgba(8,16,27,.9);
  backdrop-filter:blur(16px) saturate(120%);
  border-bottom:1px solid var(--border);
}
.anchor-inner{display:flex;align-items:center;gap:10px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-pill{
  display:inline-flex;align-items:center;gap:7px;flex-shrink:0;
  height:36px;padding:0 16px;border-radius:var(--radius-btn);
  font-size:13.5px;font-weight:500;color:var(--text-sub);
  border:1px solid var(--border);background:rgba(16,26,40,.6);
  transition:all var(--ease);
}
.anchor-pill:hover{color:var(--mint);border-color:var(--border-hi);background:rgba(23,227,180,.1)}
.anchor-pill i{font-size:11px;opacity:.8}

/* ===== Timeline ===== */
.layout-split{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:56px;align-items:start}
.sticky-title{position:sticky;top:150px}
.sticky-title h2{font-size:34px;margin-bottom:16px}
.sticky-title p{font-size:15px;color:var(--text-sub);line-height:1.85;margin-bottom:20px}
.mini-figure{border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--border);position:relative;margin-top:24px;background:linear-gradient(135deg,rgba(23,227,180,.28),rgba(15,169,138,.1))}
.mini-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:0;transition:transform var(--ease)}
.mini-figure:hover img{transform:scale(1.04)}
.mini-figure figcaption{font-size:12.5px;color:var(--text-weak);padding:10px 14px;background:rgba(6,10,18,.7)}

.timeline{position:relative}
.timeline::before{
  content:"";position:absolute;left:27px;top:14px;bottom:34px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,rgba(23,227,180,.6),rgba(23,227,180,.08));
}
.step{position:relative;padding-left:82px;padding-bottom:38px}
.step:last-child{padding-bottom:0}
.step__num{
  position:absolute;left:0;top:0;width:56px;height:56px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;color:var(--mint);letter-spacing:.04em;
  background:rgba(16,26,40,.95);border:1px solid var(--border-hi);
  box-shadow:0 0 20px rgba(23,227,180,.14);
  font-variant-numeric:tabular-nums;
}
.step__body{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px 26px;backdrop-filter:blur(18px) saturate(120%);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.step__body:hover{transform:translateY(-4px);border-color:var(--border-hi);box-shadow:var(--shadow-2)}
.step__body h3{font-size:22px;margin-bottom:10px;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.step__body p{font-size:15px;color:var(--text-sub);line-height:1.85}
.step-list{margin-top:14px;display:grid;gap:8px}
.step-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text-sub)}
.step-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--mint-deep);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--radius-badge);
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  border:1px solid var(--border-hi);background:rgba(23,227,180,.1);color:var(--mint);
}
.badge--amber{border-color:rgba(255,177,90,.4);background:rgba(255,177,90,.1);color:var(--amber)}
.badge--muted{border-color:var(--border);background:rgba(120,180,200,.06);color:var(--text-weak)}

.tip{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px;align-items:start;
  margin-top:22px;padding:20px 22px;border-radius:var(--radius-card);
  background:rgba(255,177,90,.06);
  border:1px solid rgba(255,177,90,.26);
  border-left:3px solid var(--amber);
}
.tip i{color:var(--amber);font-size:18px;margin-top:3px}
.tip h4{font-size:16px;color:var(--amber);margin-bottom:6px;letter-spacing:.01em}
.tip p{font-size:14.5px;color:var(--text-sub);line-height:1.8}

/* ===== Check list section ===== */
.check-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:48px;align-items:center}
.check-figure{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--border-hi);box-shadow:0 0 40px rgba(23,227,180,.12);background:linear-gradient(135deg,rgba(23,227,180,.3),rgba(8,16,27,.9))}
.check-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--ease)}
.check-figure:hover img{transform:scale(1.04)}
.check-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,18,0) 40%,rgba(6,10,18,.72) 100%);pointer-events:none}
.check-figure .fig-tag{position:absolute;left:18px;bottom:16px;z-index:2}
.check-list{display:grid;gap:16px;margin-top:24px}
.check-item{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;
  padding:18px 20px;border-radius:var(--radius-card);
  background:var(--glass);border:1px solid var(--border);
  transition:border-color var(--ease),transform var(--ease);
}
.check-item:hover{border-color:var(--border-hi);transform:translateX(4px)}
.check-item i{color:var(--mint);font-size:16px;margin-top:4px}
.check-item h4{font-size:17px;margin-bottom:6px}
.check-item p{font-size:14.5px;color:var(--text-sub)}

/* ===== FAQ ===== */
.faq-wrap{max-width:880px;margin:0 auto}
.accordion{background:transparent;border:none;margin:0}
.accordion-item{background:transparent;border:none;border-bottom:1px solid var(--border)}
.accordion-item:first-child{border-top:1px solid var(--border)}
.accordion-title{
  display:block;position:relative;
  background:transparent;border:none;
  color:var(--text);font-size:18px;font-weight:600;line-height:1.5;
  padding:22px 52px 22px 0;
  transition:color var(--ease);
}
.accordion-title::before{display:none;content:none}
.accordion-title::after{
  content:"+";position:absolute;right:6px;top:50%;
  transform:translateY(-50%) rotate(0deg);
  font-size:24px;font-weight:400;color:var(--mint);line-height:1;
  transition:transform var(--ease);
}
.accordion-title:hover{color:var(--mint)}
.accordion-item.is-active .accordion-title::after{transform:translateY(-50%) rotate(45deg)}
.accordion-content{
  background:transparent;border:none;padding:0 40px 22px 0;
  color:var(--text-sub);font-size:15px;line-height:1.9;
}
.accordion-content p{font-size:15px;line-height:1.9;color:var(--text-sub)}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:22px;border:1px solid var(--border-hi);
  background:
    radial-gradient(circle at 88% 12%,rgba(23,227,180,.2),transparent 52%),
    linear-gradient(120deg,rgba(16,26,40,.92),rgba(8,16,27,.92));
  padding:44px 48px;
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:40px;align-items:center;
  box-shadow:var(--shadow-1);
}
.cta-band h2{font-size:32px;margin-bottom:12px}
.cta-band p{font-size:15px;color:var(--text-sub);max-width:460px}
.cta-form{display:flex;flex-wrap:wrap;gap:12px}
.field{flex:1 1 220px;min-width:0}
.field label{display:block;font-size:13px;color:var(--text-sub);margin-bottom:8px;font-weight:500}
.field input{
  width:100%;height:48px;padding:0 16px;border-radius:var(--radius-input);
  background:rgba(6,10,18,.72);border:1px solid var(--border);
  color:var(--text);font-size:15px;outline:none;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field input::placeholder{color:var(--text-weak)}
.field input:focus{border-color:var(--mint);box-shadow:0 0 0 3px rgba(23,227,180,.14);background:rgba(6,10,18,.95)}
.form-note{flex-basis:100%;font-size:12.5px;color:var(--text-weak);line-height:1.7}
.form-row{display:flex;gap:12px;flex-wrap:wrap;flex-basis:100%}

/* ===== Footer ===== */
.site-footer{
  background:#04070D;border-top:1px solid var(--border);
  padding-top:64px;color:var(--text-sub);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr 1.3fr;gap:40px;padding-bottom:48px}
.footer-brand .brand{margin-bottom:16px;display:inline-flex}
.footer-desc{font-size:14px;color:var(--text-weak);line-height:1.85;max-width:320px}
.footer-col h4{font-size:15px;color:var(--text);margin-bottom:18px;font-weight:600;letter-spacing:.01em}
.footer-col ul{display:grid;gap:11px}
.footer-col li{font-size:14px;color:var(--text-weak);line-height:1.7}
.footer-col a{font-size:14px;color:var(--text-weak)}
.footer-col a:hover{color:var(--mint)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0 28px;border-top:1px solid var(--border);
  font-size:13px;color:var(--text-weak);
}
.to-top{display:inline-flex;align-items:center;gap:8px;color:var(--text-sub);font-size:13px}
.to-top:hover{color:var(--mint)}
.to-top i{font-size:11px}

/* ===== Mobile menu (Foundation Reveal) ===== */
.mobile-menu{
  background:var(--surface)!important;border:1px solid var(--border);border-radius:20px;
  padding:26px 22px 30px;width:min(92vw,420px);outline:none;
}
.mobile-menu .close-button{color:var(--text-sub);top:14px;right:16px}
.mobile-menu .close-button:hover{color:var(--mint)}
.mobile-menu .brand{margin-bottom:20px}
.mobile-nav{display:grid;gap:2px}
.mobile-nav a{
  display:flex;align-items:center;height:52px;font-size:17px;font-weight:500;
  color:rgba(234,242,255,.78);border-bottom:1px solid var(--border);
}
.mobile-nav a.is-active{color:var(--mint)}
.mobile-nav .m-login{margin-top:18px;border-bottom:none;color:var(--text-sub);font-size:16px;height:46px}
.mobile-menu .btn--primary{margin-top:10px}

/* ===== Responsive ===== */
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-search{display:none}
  .link-login{display:none}
  .menu-toggle{display:inline-flex}
  .search-icon-btn{display:inline-flex}
  .header-inner{height:60px;gap:14px}
  .site-header .brand__text{font-size:16px}
  .anchor-bar{top:60px}
  .page-head h1{font-size:40px}
  .head-grid{grid-template-columns:1fr;gap:32px}
  .layout-split{grid-template-columns:1fr;gap:32px}
  .sticky-title{position:static}
  .mini-figure{margin-top:0;max-width:520px}
  .check-grid{grid-template-columns:1fr;gap:32px}
  .cta-band{grid-template-columns:1fr;padding:36px 32px;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding-top:72px;padding-bottom:72px}
  .section-head h2{font-size:30px}
}
@media (max-width:767px){
  .page-head h1{font-size:34px}
  .head-stats{grid-template-columns:1fr 1fr 1fr;gap:10px}
  .stat-card{padding:14px 12px}
  .stat-card b{font-size:22px}
  .step{padding-left:0;padding-bottom:32px}
  .timeline::before{left:19px;top:10px;bottom:24px}
  .step__num{position:static;width:40px;height:40px;border-radius:12px;font-size:14px;margin-bottom:14px}
  .step__body{padding:20px 18px}
  .step__body h3{font-size:19px}
  .cta-band{padding:28px 20px;border-radius:18px}
  .cta-band h2{font-size:26px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (max-width:520px){
  .container{padding-left:20px;padding-right:20px}
  .site-header .brand__text{font-size:15px}
  .header-actions{gap:8px}
  .btn--sm{height:36px;padding:0 14px;font-size:13.5px}
  .page-head{padding:36px 0 34px}
  .page-head h1{font-size:30px}
  .head-lead{font-size:15px}
  .head-stats{grid-template-columns:1fr;gap:10px}
  .stat-card{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px}
  .stat-card small{margin-top:0}
  .check-item{padding:16px;gap:12px}
  .accordion-title{font-size:16.5px;padding:18px 44px 18px 0}
  .accordion-content{padding-right:0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .section{padding-top:56px;padding-bottom:56px}
  .section-head h2{font-size:26px}
  .btn{width:100%}
  .form-row .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --bg:#060A12;
  --surface:#0B1420;
  --surface-alt:#08101B;
  --primary:#17E3B4;
  --primary-deep:#0FA98A;
  --amber:#FFB15A;
  --text:#EAF2FF;
  --text-2:#A9B8CC;
  --text-3:#6E7F95;
  --line:rgba(120,180,200,.14);
  --line-strong:rgba(23,227,180,.38);
  --glass:rgba(16,26,40,.55);
  --glass-solid:rgba(16,26,40,.92);
  --r-card:18px;
  --r-img:14px;
  --r-btn:999px;
  --r-input:12px;
  --r-badge:8px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-hover:0 18px 44px rgba(0,0,0,.5);
  --glow:0 0 26px rgba(23,227,180,.28);
  --ease:220ms cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:96px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.drawer-open{overflow:hidden}
h1,h2,h3,h4,h5{margin:0;color:var(--text);letter-spacing:-.01em;font-weight:700}
h1{font-size:clamp(32px,4.2vw,56px);line-height:1.15}
h2{font-size:clamp(26px,3vw,36px);line-height:1.25}
h3{font-size:clamp(20px,2vw,24px);line-height:1.4;font-weight:600}
h4{font-size:18px;line-height:1.45;font-weight:600}
p{margin:0 0 16px;color:var(--text-2);font-size:16px;line-height:1.85}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--primary);text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease)}
a:hover{color:#5cf2cf}
img{max-width:100%;display:block;border-radius:var(--r-img)}
button{font-family:inherit}
::selection{background:rgba(23,227,180,.28);color:#fff}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0;position:relative}
.section--alt{background:var(--surface-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px}
.section-head__text{max-width:660px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;letter-spacing:.06em;
  color:var(--primary);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--primary);border-radius:2px;display:block}
.lead{font-size:17px;color:var(--text-2);line-height:1.8}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:#04140F;padding:12px 20px;border-radius:0 0 12px 0;z-index:200;font-weight:600}
.skip-link:focus{left:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,10,18,.94);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px rgba(0,0,0,.4);
}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand__mark{
  width:22px;height:22px;border-radius:6px;display:block;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  box-shadow:var(--glow);
  position:relative;
  transform:rotate(45deg);
}
.brand__mark::after{
  content:"";position:absolute;inset:6px;border-radius:2px;
  background:rgba(4,20,15,.72);
}
.brand__text{font-size:17px;font-weight:600;color:var(--text);letter-spacing:-.01em;white-space:nowrap}
.brand:hover .brand__text{color:#fff}

.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;
  font-size:15px;font-weight:500;color:rgba(234,242,255,.7);border-radius:999px;
  transition:color var(--ease),background var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:-11px;height:2px;
  background:var(--primary);border-radius:2px;transition:left var(--ease),right var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{left:14px;right:14px}
.nav-link.is-active{
  color:var(--text);background:rgba(23,227,180,.10);
  box-shadow:inset 0 0 0 1px rgba(23,227,180,.22);
}
.nav-link.is-active::after{left:14px;right:14px}

.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{position:relative;width:200px}
.search-box input{
  width:100%;height:38px;padding:0 38px 0 14px;
  background:rgba(16,26,40,.65);
  border:1px solid var(--line);border-radius:var(--r-btn);
  color:var(--text);font-size:13.5px;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.search-box input::placeholder{color:var(--text-3)}
.search-box input:focus{outline:none;border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(23,227,180,.12);background:rgba(16,26,40,.9)}
.search-box button{
  position:absolute;right:4px;top:4px;width:30px;height:30px;border:0;border-radius:50%;
  background:transparent;color:var(--text-2);cursor:pointer;display:grid;place-items:center;
  transition:color var(--ease),background var(--ease);
}
.search-box button:hover{color:var(--primary);background:rgba(23,227,180,.12)}
.link-login{font-size:14.5px;font-weight:500;color:var(--text-2)}
.link-login:hover{color:var(--primary)}

.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:rgba(16,26,40,.7);color:var(--text);cursor:pointer;
  align-items:center;justify-content:center;font-size:17px;
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--primary)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
}
.btn--primary{background:var(--primary);color:#04140F;box-shadow:var(--glow)}
.btn--primary:hover{background:#3af0c4;color:#04140F;box-shadow:0 0 34px rgba(23,227,180,.42)}
.btn--primary:active{transform:scale(.98)}
.btn--ghost{background:transparent;color:var(--text);border-color:rgba(23,227,180,.35)}
.btn--ghost:hover{background:rgba(23,227,180,.12);color:var(--text);border-color:var(--line-strong)}
.btn--ghost:active{transform:scale(.98)}
.btn--sm{height:38px;padding:0 18px;font-size:14px}
.btn--block{width:100%}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--primary);
}
.btn-text i{transition:transform var(--ease)}
.btn-text:hover i{transform:translateX(3px)}

/* ============ 面包屑与页头 ============ */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);margin-bottom:26px}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--text)}

.page-hero{
  position:relative;overflow:hidden;padding:56px 0 76px;
  background:
    radial-gradient(900px 420px at 84% 8%, rgba(23,227,180,.11), transparent 62%),
    radial-gradient(640px 380px at 6% 92%, rgba(255,177,90,.06), transparent 66%),
    linear-gradient(180deg,#08101B 0%,#060A12 100%);
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(rgba(120,180,200,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,180,200,.07) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(circle at 60% 30%,#000 0%,transparent 78%);
  mask-image:radial-gradient(circle at 60% 30%,#000 0%,transparent 78%);
}
.page-hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:56px;align-items:end}
.hero-title{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.hero-title .h1-note{
  font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--primary);
  border:1px solid var(--line-strong);background:rgba(23,227,180,.08);
  padding:6px 12px;border-radius:var(--r-badge);white-space:nowrap;
}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.8;color:var(--text-2);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

.hero-side{display:grid;gap:14px}
.side-stat{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
}
.side-stat strong{display:block;font-size:26px;font-weight:700;color:var(--primary);line-height:1.2}
.side-stat span{font-size:13px;color:var(--text-2)}
.side-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}

/* ============ 锚点条 ============ */
.anchor-bar{
  position:sticky;top:72px;z-index:60;
  background:rgba(8,16,27,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.anchor-bar .container{display:flex;align-items:center;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.anchor-bar .container::-webkit-scrollbar{display:none}
.anchor-pill{
  flex:0 0 auto;display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--r-btn);
  font-size:14px;font-weight:500;color:var(--text-2);
  border:1px solid var(--line);background:rgba(16,26,40,.6);
  transition:all var(--ease);
}
.anchor-pill:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(23,227,180,.10)}

/* ============ 徽章与标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:var(--r-badge);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  border:1px solid rgba(23,227,180,.34);background:rgba(23,227,180,.10);color:var(--primary);
}
.badge--amber{border-color:rgba(255,177,90,.34);background:rgba(255,177,90,.10);color:var(--amber)}
.badge--muted{border-color:var(--line);background:rgba(120,180,200,.07);color:var(--text-2)}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:var(--r-btn);
  font-size:13px;color:var(--text-2);border:1px solid var(--line);background:rgba(16,26,40,.5);
}

/* ============ 左粘性标题 + 右纵向条目 ============ */
.split{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:56px;align-items:start}
.split__aside{position:sticky;top:150px}
.split__aside h2{margin-bottom:16px}
.split__aside p{font-size:15.5px;color:var(--text-2)}
.aside-notes{margin-top:28px;display:grid;gap:12px}
.aside-notes li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7}
.aside-notes i{color:var(--primary);font-size:13px;margin-top:6px}

.feature-list{display:grid;gap:16px}
.feature-item{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;
  padding:26px 26px 26px 22px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.feature-item:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.feature-num{
  font-family:"Inter",system-ui,-apple-system,sans-serif;
  font-size:26px;font-weight:700;line-height:1;color:rgba(23,227,180,.5);letter-spacing:-.02em;
  padding-top:2px;
}
.feature-body h3{font-size:19px;margin-bottom:8px}
.feature-body p{font-size:15px;line-height:1.8;margin-bottom:12px}
.feature-meta{display:flex;flex-wrap:wrap;gap:8px}

/* ============ 指标条带 ============ */
.metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:8px 0;backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.metric{padding:24px 26px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric strong{display:block;font-size:28px;font-weight:700;color:var(--primary);line-height:1.2;letter-spacing:-.02em}
.metric span{display:block;margin-top:6px;font-size:13px;color:var(--text-3);line-height:1.6}

/* ============ 图文区 ============ */
.media-split{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:56px;align-items:center}
.media-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:0 0 40px rgba(23,227,180,.12),var(--shadow);
  background:linear-gradient(140deg,rgba(23,227,180,.30),rgba(8,16,27,.9));
  aspect-ratio:16/10;
}
.media-figure img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 400ms cubic-bezier(.2,.7,.3,1)}
.media-figure:hover img{transform:scale(1.03)}
.media-figure::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,10,18,.05) 0%,rgba(6,10,18,.55) 100%);
}
.scene-list{display:grid;gap:18px;margin-top:28px}
.scene-item{
  display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;
  padding:20px;border-radius:14px;border:1px solid var(--line);
  background:rgba(16,26,40,.45);
  transition:border-color var(--ease),transform var(--ease),background var(--ease);
}
.scene-item:hover{border-color:var(--line-strong);transform:translateX(3px);background:rgba(16,26,40,.7)}
.scene-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(23,227,180,.12);color:var(--primary);border:1px solid rgba(23,227,180,.24);font-size:16px;
}
.scene-item h4{font-size:16.5px;margin-bottom:4px}
.scene-item p{font-size:14.5px;line-height:1.75;color:var(--text-2);margin:0}

/* ============ 终端卡带（非等宽） ============ */
.terminal-strip{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:24px}
.terminal-card{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  border:1px solid var(--line);background:var(--glass);
  padding:28px;display:flex;flex-direction:column;justify-content:space-between;gap:22px;
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.terminal-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.terminal-card--hero{background:linear-gradient(160deg,rgba(23,227,180,.14),rgba(16,26,40,.6) 62%)}
.terminal-card h3{font-size:20px;margin-bottom:10px}
.terminal-card p{font-size:14.5px;line-height:1.75;margin:0}
.terminal-card .thumb{border-radius:12px;overflow:hidden;aspect-ratio:16/10;background:linear-gradient(140deg,rgba(23,227,180,.28),rgba(8,16,27,.9))}
.terminal-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.terminal-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:56px;align-items:start}
.accordion{background:transparent;border:0;margin:0;padding:0}
.accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.accordion-item:first-child{border-top:1px solid var(--line)}
.accordion-title{
  display:block;position:relative;padding:20px 48px 20px 0;
  font-size:18px;font-weight:600;color:var(--text);background:transparent;border:0;
  transition:color var(--ease);
}
.accordion-title:hover{color:var(--primary);background:transparent}
.accordion-title::before{display:none}
.accordion-title::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-size:24px;font-weight:400;line-height:1;color:var(--text-2);
  transition:transform var(--ease),color var(--ease);
}
.accordion-item.is-active > .accordion-title{color:var(--primary)}
.accordion-item.is-active > .accordion-title::after{transform:translateY(-50%) rotate(45deg);color:var(--primary)}
.accordion-content{padding:0 40px 24px 0;background:transparent;border:0;color:var(--text-2)}
.accordion-content p{font-size:15px;line-height:1.9;color:var(--text-2)}

/* ============ CTA ============ */
.cta-card{
  position:relative;overflow:hidden;
  border-radius:24px;border:1px solid var(--line-strong);
  background:
    radial-gradient(720px 320px at 12% 10%, rgba(23,227,180,.16), transparent 62%),
    linear-gradient(120deg,rgba(16,26,40,.95),rgba(8,16,27,.95));
  padding:48px;
  display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:48px;align-items:center;
  box-shadow:0 0 50px rgba(23,227,180,.10),var(--shadow);
}
.cta-card::after{
  content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,227,180,.20),transparent 68%);
  pointer-events:none;
}
.cta-card h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:12px}
.cta-card p{font-size:15px;color:var(--text-2);max-width:480px}
.cta-form{position:relative;z-index:2}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:8px}
.field input{
  width:100%;height:48px;padding:0 16px;border-radius:var(--r-input);
  background:rgba(16,26,40,.85);border:1px solid var(--line);color:var(--text);font-size:15px;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.field input::placeholder{color:var(--text-3)}
.field input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(23,227,180,.14);background:rgba(16,26,40,1)}
.form-note{font-size:12.5px;color:var(--text-3);line-height:1.7;margin-top:12px}
.form-note a{color:var(--text-2);text-decoration:underline;text-underline-offset:3px}
.form-note a:hover{color:var(--primary)}

/* ============ 页脚 ============ */
.site-footer{background:#04080F;border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:minmax(0,4fr) repeat(3,minmax(0,2.6fr));gap:40px;padding-bottom:48px}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{font-size:14.5px;line-height:1.85;color:var(--text-3);max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text);margin-bottom:18px;letter-spacing:.01em}
.footer-col ul{display:grid;gap:12px}
.footer-col li{font-size:14px;color:var(--text-3);line-height:1.7}
.footer-col a{font-size:14px;color:var(--text-3)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:22px 0;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2)}
.to-top:hover{color:var(--primary)}

/* ============ 移动抽屉 ============ */
.drawer{position:fixed;inset:0;z-index:120;display:none}
.drawer.is-open{display:block}
.drawer__mask{position:absolute;inset:0;background:rgba(3,6,12,.72);backdrop-filter:blur(4px)}
.drawer__panel{
  position:absolute;top:0;right:0;bottom:0;width:min(340px,88vw);
  background:#080F1A;border-left:1px solid var(--line);
  padding:22px;display:flex;flex-direction:column;gap:22px;overflow-y:auto;
  animation:drawerIn 240ms cubic-bezier(.2,.7,.3,1);
}
@keyframes drawerIn{from{transform:translateX(24px);opacity:.4}to{transform:translateX(0);opacity:1}}
.drawer__head{display:flex;align-items:center;justify-content:space-between}
.drawer__close{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:transparent;color:var(--text-2);cursor:pointer;display:grid;place-items:center;
}
.drawer__close:hover{color:var(--primary);border-color:var(--line-strong)}
.drawer__nav{display:grid}
.drawer__nav a{
  display:flex;align-items:center;height:52px;font-size:17px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer__nav a.is-active{color:var(--primary)}
.drawer__nav a:hover{color:var(--primary)}
.drawer__login{display:flex;align-items:center;height:48px;font-size:16px;color:var(--text-2);justify-content:center;border:1px solid var(--line);border-radius:var(--r-btn)}
.drawer__login:hover{color:var(--primary);border-color:var(--line-strong)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .nav-links{gap:0}
  .nav-link{padding:0 10px;font-size:14px}
  .search-box{width:168px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .nav-links,.search-box,.link-login{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{height:64px;gap:16px}
  .hero-grid{grid-template-columns:1fr;gap:36px;align-items:start}
  .hero-side{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split,.faq-wrap{grid-template-columns:1fr;gap:32px}
  .split__aside,.aside-notes{position:static}
  .media-split{grid-template-columns:1fr;gap:32px}
  .media-figure{order:-1}
  .terminal-strip{grid-template-columns:1fr 1fr}
  .terminal-card--hero{grid-column:1 / -1}
  .cta-card{grid-template-columns:1fr;gap:28px;padding:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .metrics{grid-template-columns:1fr 1fr}
  .metric{border-right:0;border-bottom:1px solid var(--line)}
  .metric:nth-child(odd){border-right:1px solid var(--line)}
  .metric:nth-last-child(-n+2){border-bottom:0}
  .anchor-bar{top:64px}
  .split__aside{top:auto}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  h1{font-size:32px}
  h2{font-size:26px}
  body{font-size:15px}
  p{font-size:15px;line-height:1.8}
  .page-hero{padding:36px 0 52px}
  .hero-sub{font-size:15.5px}
  .hero-side{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .feature-item{grid-template-columns:1fr;gap:10px;padding:22px}
  .feature-num{font-size:22px}
  .terminal-strip{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr}
  .metric{border-right:0!important;border-bottom:1px solid var(--line)}
  .metric:last-child{border-bottom:0}
  .cta-card{padding:26px;border-radius:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .accordion-title{font-size:16.5px;padding:18px 42px 18px 0}
  .accordion-content{padding-right:0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px}
  .media-figure{aspect-ratio:16/11}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* roulang page: category4 */
:root{
  --bg:#060A12;
  --surface:#0B1420;
  --surface-alt:#08101B;
  --brand:#17E3B4;
  --brand-deep:#0FA98A;
  --amber:#FFB15A;
  --text:#EAF2FF;
  --text-2:#A9B8CC;
  --text-3:#6E7F95;
  --line:rgba(120,180,200,.14);
  --line-strong:rgba(23,227,180,.38);
  --glass:rgba(16,26,40,.55);
  --glass-solid:rgba(16,26,40,.92);
  --r-card:18px;
  --r-img:14px;
  --r-btn:999px;
  --r-input:12px;
  --r-badge:8px;
  --sh-1:0 10px 30px rgba(0,0,0,.35);
  --sh-2:0 18px 44px rgba(0,0,0,.5);
  --glow:0 0 26px rgba(23,227,180,.28);
  --t:220ms cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
  --pad-section:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand);text-decoration:none;transition:color var(--t),border-color var(--t),background var(--t);}
a:hover,a:focus{color:#5CF3D0;}
h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
h1,h2,h3,h4{font-family:inherit;color:var(--text);letter-spacing:-.01em;line-height:1.25;}
h1{font-size:52px;font-weight:700;line-height:1.15;}
h2{font-size:36px;font-weight:700;}
h3{font-size:23px;font-weight:600;line-height:1.4;}
h4{font-size:18px;font-weight:600;}
p{font-size:16px;line-height:1.85;color:var(--text-2);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
button{cursor:pointer;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(23,227,180,.28);color:#fff;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;left:0;right:0;z-index:120;
  height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(6,10,18,.55);
  border-bottom:1px solid transparent;
  transition:background var(--t),border-color var(--t),box-shadow var(--t);
}
.site-header.is-scrolled{
  background:rgba(8,16,27,.86);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  border-bottom:1px solid var(--line);
  box-shadow:0 8px 24px rgba(0,0,0,.32);
}
.header-inner{display:flex;align-items:center;gap:24px;height:var(--nav-h);}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:22px;height:22px;border-radius:6px;display:inline-block;position:relative;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  box-shadow:0 0 18px rgba(23,227,180,.5);
}
.brand__mark::after{
  content:"";position:absolute;inset:6px;border-radius:2px;
  background:rgba(4,20,15,.86);
}
.brand__text{
  font-size:17px;font-weight:600;color:var(--text);letter-spacing:0;
  white-space:nowrap;
}
.brand:hover .brand__text{color:#fff;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 14px;border-radius:999px;
  font-size:15px;font-weight:500;color:rgba(234,242,255,.7);
  transition:color var(--t),background var(--t);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:2px;height:2px;width:0;
  background:var(--brand);border-radius:2px;
  transform:translateX(-50%);
  transition:width var(--t);
}
.nav-link:hover{color:#fff;background:rgba(23,227,180,.07);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{
  color:var(--text);
  background:rgba(23,227,180,.10);
  box-shadow:inset 0 0 0 1px rgba(23,227,180,.22);
}
.nav-link.is-active::after{width:60%;}
.header-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.nav-search{
  position:relative;display:flex;align-items:center;
  width:200px;height:38px;
  background:rgba(16,26,40,.72);
  border:1px solid var(--line);
  border-radius:999px;
  padding:0 14px 0 36px;
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-search:focus-within{border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(23,227,180,.10);}
.nav-search i{
  position:absolute;left:13px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--text-3);
}
.nav-search input{
  width:100%;height:100%;border:0;background:transparent;color:var(--text);
  font-size:13.5px;line-height:1;padding:0;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search input:focus{outline:none;}
.nav-login{font-size:15px;color:rgba(234,242,255,.78);white-space:nowrap;}
.nav-login:hover{color:var(--brand);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t),color var(--t);
  cursor:pointer;white-space:nowrap;
}
.btn--sm{height:38px;padding:0 18px;font-size:14px;}
.btn--primary{
  background:var(--brand);color:#04140F;
  box-shadow:var(--glow);
}
.btn--primary:hover{
  background:#3FF0C6;color:#04140F;
  box-shadow:0 0 34px rgba(23,227,180,.46);
  transform:translateY(-1px);
}
.btn--primary:active{transform:scale(.98);}
.btn--ghost{
  background:transparent;color:var(--text);
  border:1px solid rgba(23,227,180,.35);
}
.btn--ghost:hover{background:rgba(23,227,180,.12);color:#fff;border-color:var(--line-strong);}
.btn--text{
  background:transparent;border:0;color:var(--brand);
  padding:0;height:auto;font-weight:600;
}
.btn--text i{transition:transform var(--t);font-size:13px;}
.btn--text:hover i{transform:translateX(3px);}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;
  background:rgba(16,26,40,.8);border:1px solid var(--line);color:var(--text);
  font-size:16px;
}
.menu-toggle:hover{border-color:var(--line-strong);color:var(--brand);}

/* 移动抽屉 */
.reveal.mobile-menu{
  padding:28px 24px 36px;border-radius:0;border:0;
  background:var(--glass-solid);
  width:88%;max-width:360px;height:100%;top:0;left:0;right:auto;
  border-right:1px solid var(--line);
}
.reveal-overlay{background:rgba(3,7,13,.72);}
.mobile-menu .close-button{
  color:var(--text-2);font-size:26px;line-height:1;top:18px;right:18px;
  background:transparent;border:0;
}
.mobile-menu .close-button:hover{color:var(--brand);}
.mobile-menu .brand{margin-bottom:26px;}
.mobile-menu nav{display:flex;flex-direction:column;margin-bottom:26px;}
.mobile-menu nav a{
  font-size:17px;line-height:52px;color:rgba(234,242,255,.8);
  border-bottom:1px solid var(--line);
}
.mobile-menu nav a.is-active{color:var(--brand);}
.mobile-menu .btn{width:100%;}

/* ---------- 页头 banner ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:72px 0 56px;
  background:
    radial-gradient(680px 280px at 12% 0%,rgba(23,227,180,.16),transparent 70%),
    radial-gradient(560px 300px at 88% 18%,rgba(255,177,90,.10),transparent 72%),
    linear-gradient(180deg,#08101B 0%,#060A12 100%);
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:
    linear-gradient(rgba(23,227,180,.6) 1px,transparent 1px),
    linear-gradient(90deg,rgba(23,227,180,.6) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 0%,#000 10%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 50% 0%,#000 10%,transparent 72%);
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:26px;}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--brand);}
.crumbs span.sep{color:rgba(110,127,149,.6);}
.crumbs span.current{color:var(--text);}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:48px;align-items:end;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);text-transform:uppercase;
  padding:6px 12px;border-radius:var(--r-badge);
  border:1px solid rgba(23,227,180,.3);
  background:rgba(23,227,180,.08);
  margin-bottom:20px;
}
.page-hero h1{font-size:54px;margin-bottom:18px;}
.page-hero h1 .accent{color:var(--brand);}
.hero-lead{font-size:17px;line-height:1.9;color:var(--text-2);max-width:640px;}
.hero-side{display:flex;flex-direction:column;gap:16px;}
.metric-panel{
  display:grid;grid-template-columns:1fr 1fr;gap:14px;
  padding:22px;border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
}
.metric{padding:6px 0;}
.metric strong{display:block;font-size:28px;font-weight:700;color:var(--brand);line-height:1.2;}
.metric span{display:block;font-size:13px;color:var(--text-3);margin-top:4px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 11px;border-radius:var(--r-badge);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.tag--brand{color:var(--brand);border:1px solid rgba(23,227,180,.32);background:rgba(23,227,180,.08);}
.tag--amber{color:var(--amber);border:1px solid rgba(255,177,90,.32);background:rgba(255,177,90,.08);}
.tag--muted{color:var(--text-3);border:1px solid var(--line);background:rgba(120,180,200,.05);}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;top:var(--nav-h);z-index:90;
  background:rgba(8,16,27,.92);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.anchor-inner{display:flex;align-items:center;gap:10px;overflow-x:auto;padding:14px 0;scrollbar-width:none;}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:999px;border:1px solid var(--line);
  font-size:13.5px;font-weight:500;color:var(--text-2);
  white-space:nowrap;background:rgba(16,26,40,.6);
  transition:all var(--t);
}
.anchor-chip:hover{color:var(--brand);border-color:var(--line-strong);background:rgba(23,227,180,.08);}

/* ---------- 通用板块 ---------- */
.section{padding:var(--pad-section) 0;}
.section--alt{background:var(--surface-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px;}
.section-head h2{font-size:36px;margin-bottom:12px;}
.section-head p{max-width:620px;font-size:15.5px;color:var(--text-2);}
.section-head .btn--text{flex-shrink:0;padding-bottom:6px;}

/* ---------- 筛选条 ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:16px 18px;margin-bottom:36px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
}
.filter-label{font-size:12.5px;font-weight:600;letter-spacing:.06em;color:var(--text-3);margin-right:6px;text-transform:uppercase;}
.filter-chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:999px;border:1px solid var(--line);
  background:rgba(16,26,40,.7);color:var(--text-2);
  font-size:13.5px;font-weight:500;
  transition:all var(--t);
}
.filter-chip:hover{color:var(--brand);border-color:var(--line-strong);}
.filter-chip.is-active{
  background:var(--brand);color:#04140F;border-color:var(--brand);
  box-shadow:var(--glow);
}

/* ---------- 资讯卡网格 ---------- */
.news-grid{margin-left:-12px;margin-right:-12px;}
.news-grid>.cell{padding-left:12px;padding-right:12px;margin-bottom:24px;}
.news-card{
  position:relative;height:100%;
  display:flex;flex-direction:column;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  overflow:hidden;
  box-shadow:var(--sh-1);
  backdrop-filter:blur(18px) saturate(120%);
  -webkit-backdrop-filter:blur(18px) saturate(120%);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--line-strong);}
.news-media{
  position:relative;overflow:hidden;border-radius:var(--r-img);margin:14px 14px 0;
  aspect-ratio:16/10;background:linear-gradient(135deg,rgba(23,227,180,.22),rgba(11,20,32,.9));
}
.news-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t);}
.news-card:hover .news-media img{transform:scale(1.04);}
.news-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(4,10,18,.06) 0%,rgba(4,10,18,.42) 100%);
  pointer-events:none;
}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;gap:12px;}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.news-time{font-size:12.5px;font-weight:600;color:var(--amber);letter-spacing:.02em;}
.news-card h3{font-size:19px;line-height:1.5;color:var(--text);}
.news-card:hover h3{color:#fff;}
.news-desc{
  font-size:14.5px;line-height:1.78;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:6px;}
.news-foot .read{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:600;color:var(--brand);
}
.news-foot .read i{font-size:12px;transition:transform var(--t);}
.news-card:hover .news-foot .read i{transform:translateX(3px);}
.news-card--feature .news-media{aspect-ratio:16/9;}
.news-card--feature h3{font-size:24px;line-height:1.4;}
.news-card--feature .news-desc{-webkit-line-clamp:4;font-size:15px;}

/* 空态 */
.empty-state{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:64px 24px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--r-card);
  background:rgba(16,26,40,.4);
}
.empty-state.is-visible{display:flex;}
.empty-state i{font-size:44px;color:rgba(23,227,180,.4);}
.empty-state p{font-size:14.5px;color:var(--text-3);}

/* ---------- 更新节奏时间轴 ---------- */
.rhythm-wrap{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.35fr);gap:56px;align-items:start;}
.rhythm-sticky{position:sticky;top:140px;}
.rhythm-sticky h2{font-size:36px;margin-bottom:16px;}
.rhythm-sticky p{font-size:15.5px;margin-bottom:24px;}
.rhythm-list{display:flex;flex-direction:column;gap:14px;}
.rhythm-item{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;
  padding:24px 26px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  transition:border-color var(--t),transform var(--t),background var(--t);
}
.rhythm-item:hover{border-color:var(--line-strong);transform:translateX(4px);background:rgba(23,227,180,.05);}
.rhythm-num{
  font-size:15px;font-weight:700;color:var(--brand);
  letter-spacing:.06em;line-height:1.6;
}
.rhythm-item h3{font-size:18px;margin-bottom:6px;}
.rhythm-item p{font-size:14.5px;line-height:1.78;color:var(--text-2);}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.6fr);gap:56px;align-items:start;}
.faq-intro h2{font-size:36px;margin-bottom:16px;}
.faq-intro p{font-size:15.5px;margin-bottom:20px;}
.faq-list{margin:0;border:0;background:transparent;}
.faq-list .accordion-item{
  border:0;border-bottom:1px solid var(--line);background:transparent;
}
.faq-list .accordion-item:first-child{border-top:1px solid var(--line);}
.faq-list .accordion-title{
  position:relative;
  padding:22px 52px 22px 0;
  font-size:18px;font-weight:600;color:var(--text);
  background:transparent;border:0;
  transition:color var(--t);
}
.faq-list .accordion-title:hover{color:var(--brand);}
.faq-list .accordion-title::before{
  content:"+";position:absolute;right:4px;top:50%;
  transform:translateY(-50%);
  font-size:24px;font-weight:300;color:var(--brand);line-height:1;
  transition:transform var(--t);
}
.faq-list .accordion-item.is-active>.accordion-title::before{
  content:"+";transform:translateY(-50%) rotate(45deg);
}
.faq-list .accordion-content{
  padding:0 52px 24px 0;
  font-size:15px;line-height:1.9;color:var(--text-2);
  border-top:0;background:transparent;
}
.faq-list .accordion-content p{font-size:15px;line-height:1.9;color:var(--text-2);}

/* ---------- CTA ---------- */
.cta-band{padding:0 0 var(--pad-section);}
.cta-card{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:40px;align-items:center;
  padding:44px 46px;border-radius:24px;
  background:
    radial-gradient(520px 240px at 8% 0%,rgba(23,227,180,.16),transparent 70%),
    linear-gradient(120deg,rgba(16,26,40,.9),rgba(11,20,32,.86));
  border:1px solid rgba(23,227,180,.24);
  box-shadow:var(--sh-1);
  position:relative;overflow:hidden;
}
.cta-card::after{
  content:"";position:absolute;right:-60px;bottom:-90px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,227,180,.18),transparent 68%);
  pointer-events:none;
}
.cta-card h2{font-size:30px;margin-bottom:12px;position:relative;z-index:2;}
.cta-card p{font-size:15px;max-width:440px;position:relative;z-index:2;}
.cta-form{position:relative;z-index:2;display:flex;flex-direction:column;gap:10px;}
.cta-form .field-row{display:flex;gap:12px;}
.cta-form label{font-size:13px;font-weight:600;color:var(--text-2);letter-spacing:.02em;}
.cta-form input{
  flex:1;height:48px;padding:0 18px;border-radius:var(--r-input);
  background:rgba(6,10,18,.72);border:1px solid var(--line);color:var(--text);
  font-size:14.5px;transition:border-color var(--t),box-shadow var(--t);
}
.cta-form input::placeholder{color:var(--text-3);}
.cta-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,227,180,.12);}
.cta-note{font-size:12.5px;color:var(--text-3);line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#04080F;border-top:1px solid var(--line);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:56px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-desc{font-size:14px;line-height:1.85;color:var(--text-3);max-width:320px;}
.footer-col h4{
  font-size:14px;font-weight:600;color:var(--text);
  letter-spacing:.06em;margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col li{font-size:14px;line-height:1.7;color:var(--text-3);}
.footer-col a{font-size:14px;color:var(--text-3);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:22px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.to-top{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.to-top:hover{color:var(--brand);}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  :root{--pad-section:72px;}
  h1{font-size:40px;}
  .page-hero h1{font-size:40px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .nav-search{display:none;}
  .nav-links{display:none;}
  .menu-toggle{display:inline-flex;}
  .rhythm-wrap,.faq-wrap{grid-template-columns:1fr;gap:32px;}
  .rhythm-sticky{position:static;}
  .cta-card{grid-template-columns:1fr;padding:36px 30px;gap:26px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media screen and (max-width:767px){
  :root{--pad-section:56px;--nav-h:60px;}
  .container{padding-left:20px;padding-right:20px;}
  h1,.page-hero h1{font-size:32px;line-height:1.22;}
  h2,.section-head h2,.rhythm-sticky h2,.faq-intro h2{font-size:26px;}
  h3{font-size:19px;}
  p{font-size:15px;line-height:1.8;}
  .page-hero{padding:44px 0 40px;}
  .hero-lead{font-size:15.5px;}
  .metric-panel{padding:18px;}
  .metric strong{font-size:24px;}
  .anchor-inner{padding:12px 0;}
  .news-card--feature h3{font-size:20px;}
  .news-card h3{font-size:17.5px;}
  .cta-form .field-row{flex-direction:column;}
  .cta-form .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;}
  .rhythm-item{grid-template-columns:48px minmax(0,1fr);padding:20px;gap:14px;}
  .filter-bar{padding:14px;}
}
@media screen and (max-width:519px){
  .brand__text{font-size:15.5px;}
  .header-right .nav-login{display:none;}
  .btn--sm{height:36px;padding:0 14px;font-size:13px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}
@supports not ((backdrop-filter:blur(2px)) or (-webkit-backdrop-filter:blur(2px))){
  .news-card,.metric-panel,.filter-bar,.site-header.is-scrolled,.anchor-bar{
    background:var(--glass-solid);
  }
}