/* roulang page: index */
:root{
  --ls-neon:#00E6A8;
  --ls-orange:#FF6B2C;
  --ls-bg:#0D1114;
  --ls-surface:#161D21;
  --ls-surface-2:#1C2529;
  --ls-light:#F7FAF9;
  --ls-text:#EAF4F0;
  --ls-muted:#A7B5AF;
  --ls-ink:#17201D;
  --ls-ink-muted:#4B5A55;
  --ls-border:rgba(0,230,168,.18);
  --ls-border-strong:rgba(0,230,168,.42);
  --ls-shadow:0 12px 30px rgba(0,0,0,.28);
  --ls-shadow-lg:0 22px 48px rgba(0,0,0,.42);
  --ls-glow:0 0 0 1px rgba(0,230,168,.35),0 0 22px rgba(0,230,168,.22);
  --ls-radius:18px;
  --ls-radius-sm:10px;
  --ls-radius-pill:999px;
  --ls-nav-h:70px;
  --ls-font:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--ls-bg);
  color:var(--ls-text);
  font-family:var(--ls-font);
  font-size:17px;
  line-height:1.8;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,opacity .18s ease;}
a:hover{color:var(--ls-neon);}
button,input,textarea,select{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:800;letter-spacing:.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--ls-neon);outline-offset:3px;border-radius:4px;}
.ls-container{width:100%;max-width:1240px;margin:0 auto;padding:0 22px;}
.ls-skip{position:absolute;left:-9999px;top:0;background:var(--ls-neon);color:var(--ls-ink);padding:10px 16px;z-index:200;}
.ls-skip:focus{left:12px;top:12px;}

/* ---------- header ---------- */
.ls-header{
  position:sticky;top:0;z-index:120;
  background:rgba(13,17,20,.92);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid var(--ls-border);
  transition:background-color .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.ls-header.is-scrolled{background:rgba(9,12,14,.97);box-shadow:0 10px 26px rgba(0,0,0,.42);border-bottom-color:var(--ls-border-strong);}
.ls-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,rgba(0,230,168,0) 0%,rgba(0,230,168,.75) 22%,rgba(255,107,44,.55) 62%,rgba(0,230,168,0) 100%);
}
.ls-nav{display:flex;align-items:center;justify-content:space-between;min-height:var(--ls-nav-h);gap:18px;}
.ls-logo{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:800;letter-spacing:.04em;color:var(--ls-text);}
.ls-logo:hover{color:var(--ls-text);}
.ls-logo__mark{
  width:34px;height:34px;border-radius:11px;flex:0 0 34px;
  background:linear-gradient(135deg,var(--ls-neon),#0aa87c);
  display:flex;align-items:center;justify-content:center;
  color:#06231a;font-size:15px;font-weight:900;
  box-shadow:0 0 18px rgba(0,230,168,.35);
}
.ls-logo__text small{display:block;font-size:11px;font-weight:500;color:var(--ls-muted);letter-spacing:.16em;line-height:1.2;}
.ls-menu{display:flex;align-items:center;gap:6px;}
.ls-menu__link{
  position:relative;display:inline-block;padding:10px 14px;border-radius:var(--ls-radius-pill);
  font-size:15px;font-weight:500;color:#C6D3CE;white-space:nowrap;
}
.ls-menu__link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--ls-neon);transform:scaleX(0);transform-origin:left center;
  transition:transform .22s ease;box-shadow:0 0 10px rgba(0,230,168,.6);
}
.ls-menu__link:hover{color:var(--ls-text);background:rgba(0,230,168,.07);}
.ls-menu__link:hover::after{transform:scaleX(1);}
.ls-menu__link.is-active{color:var(--ls-neon);}
.ls-menu__link.is-active::after{transform:scaleX(1);}
.ls-nav__right{display:flex;align-items:center;gap:12px;}
.ls-burger{
  display:none;width:46px;height:46px;border-radius:13px;border:1px solid var(--ls-border);
  background:var(--ls-surface);color:var(--ls-text);cursor:pointer;
  align-items:center;justify-content:center;
}
.ls-burger span{display:block;width:20px;height:2px;background:var(--ls-text);position:relative;transition:background .18s ease;}
.ls-burger span::before,.ls-burger span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ls-text);transition:transform .2s ease;
}
.ls-burger span::before{top:-6px;}
.ls-burger span::after{top:6px;}
.ls-drawer{
  position:fixed;inset:0 0 0 auto;width:min(320px,84vw);z-index:160;
  background:#101719;border-left:1px solid var(--ls-border);
  transform:translateX(104%);transition:transform .28s ease;
  padding:26px 22px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.ls-drawer.is-open{transform:translateX(0);}
.ls-drawer__title{font-size:13px;letter-spacing:.2em;color:var(--ls-muted);margin-bottom:10px;}
.ls-drawer a{
  display:block;padding:14px 12px;border-radius:12px;font-size:16px;font-weight:600;
  border:1px solid transparent;
}
.ls-drawer a:hover,.ls-drawer a.is-active{background:rgba(0,230,168,.1);border-color:var(--ls-border);color:var(--ls-neon);}
.ls-drawer__close{
  align-self:flex-end;width:44px;height:44px;border-radius:12px;border:1px solid var(--ls-border);
  background:transparent;color:var(--ls-text);cursor:pointer;font-size:20px;line-height:1;
}
.ls-drawer__cta{margin-top:14px;}
.ls-mask{
  position:fixed;inset:0;background:rgba(6,9,10,.62);backdrop-filter:blur(2px);
  opacity:0;visibility:hidden;transition:opacity .26s ease,visibility .26s ease;z-index:150;
}
.ls-mask.is-open{opacity:1;visibility:visible;}

/* ---------- buttons ---------- */
.ls-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--ls-radius-pill);
  font-size:15.5px;font-weight:700;cursor:pointer;border:1px solid transparent;
  transition:transform .16s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.ls-btn--primary{background:var(--ls-orange);color:#fff;box-shadow:0 10px 24px rgba(255,107,44,.28);}
.ls-btn--primary:hover{background:#ff7d45;color:#fff;transform:translateY(-1px);box-shadow:0 14px 30px rgba(255,107,44,.36);}
.ls-btn--neon{background:var(--ls-neon);color:#06231a;box-shadow:0 10px 24px rgba(0,230,168,.24);}
.ls-btn--neon:hover{background:#25f4bc;color:#06231a;transform:translateY(-1px);box-shadow:0 14px 30px rgba(0,230,168,.34);}
.ls-btn--ghost{background:transparent;border-color:var(--ls-border-strong);color:var(--ls-text);}
.ls-btn--ghost:hover{border-color:var(--ls-neon);color:var(--ls-neon);box-shadow:var(--ls-glow);}
.ls-btn--sm{padding:10px 18px;font-size:14px;}
.ls-btn:active{transform:translateY(1px);}
.ls-btn--block{width:100%;}

/* ---------- hero ---------- */
.ls-hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(100deg,rgba(8,12,14,.94) 6%,rgba(9,14,16,.82) 46%,rgba(11,20,19,.66) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--ls-border);
}
.ls-hero::before{
  content:"";position:absolute;inset:auto -10% -40% 40%;height:420px;
  background:radial-gradient(circle at 50% 50%,rgba(0,230,168,.16),rgba(0,230,168,0) 65%);
  pointer-events:none;
}
.ls-hero__inner{position:relative;padding:86px 0 74px;display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center;}
.ls-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:var(--ls-radius-pill);
  background:rgba(0,230,168,.1);border:1px solid var(--ls-border);
  color:var(--ls-neon);font-size:13.5px;font-weight:600;letter-spacing:.06em;
}
.ls-eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--ls-neon);box-shadow:0 0 10px var(--ls-neon);font-style:normal;}
.ls-hero h1{
  margin:22px 0 0;font-size:clamp(32px,4.6vw,54px);font-weight:800;line-height:1.22;
}
.ls-hero h1 em{font-style:normal;color:var(--ls-neon);}
.ls-hero__lead{margin-top:18px;font-size:18.5px;color:#CBD9D4;max-width:600px;line-height:1.85;}
.ls-hero__actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
.ls-hero__note{margin-top:16px;font-size:13.5px;color:var(--ls-muted);}
.ls-hero__panel{
  background:linear-gradient(180deg,rgba(28,37,41,.96),rgba(18,25,28,.96));
  border:1px solid var(--ls-border);border-radius:22px;padding:26px 24px;
  box-shadow:var(--ls-shadow-lg);
}
.ls-hero__panel h2{font-size:17px;color:var(--ls-text);font-weight:700;display:flex;align-items:center;justify-content:space-between;}
.ls-hero__panel h2 span{font-size:12.5px;font-weight:500;color:var(--ls-neon);}
.ls-livebar{margin-top:20px;display:flex;flex-direction:column;gap:14px;}
.ls-livebar li{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:13px 15px;border-radius:14px;background:rgba(0,230,168,.055);
  border:1px solid rgba(0,230,168,.13);
}
.ls-livebar b{font-size:15px;font-weight:600;color:#DCE8E4;}
.ls-livebar span{font-size:13px;color:var(--ls-muted);}
.ls-livebar em{font-style:normal;font-family:"DIN Alternate","Oswald",var(--ls-font);font-size:19px;font-weight:700;color:var(--ls-neon);letter-spacing:.04em;}
.ls-badges{margin-top:44px;display:flex;flex-wrap:wrap;gap:14px 40px;padding-top:26px;border-top:1px solid rgba(255,255,255,.08);}
.ls-badge-item{display:flex;flex-direction:column;gap:2px;}
.ls-badge-item strong{font-family:"DIN Alternate","Oswald",var(--ls-font);font-size:26px;font-weight:800;color:var(--ls-neon);letter-spacing:.02em;}
.ls-badge-item span{font-size:13.5px;color:var(--ls-muted);}

/* ---------- sections ---------- */
.ls-section{padding:96px 0;}
.ls-section--tight{padding:72px 0;}
.ls-section--alt{background:linear-gradient(180deg,#101719 0%,#0D1114 100%);border-top:1px solid rgba(255,255,255,.045);border-bottom:1px solid rgba(255,255,255,.045);}
.ls-section__head{max-width:760px;margin-bottom:44px;}
.ls-section__head--center{margin-left:auto;margin-right:auto;text-align:center;}
.ls-section__label{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.2em;color:var(--ls-orange);
  text-transform:uppercase;margin-bottom:12px;
}
.ls-section__head h2{font-size:clamp(26px,3.2vw,36px);font-weight:800;}
.ls-section__head p{margin-top:14px;color:var(--ls-muted);font-size:16.5px;line-height:1.85;}

.ls-card{
  background:var(--ls-surface);border:1px solid var(--ls-border);border-radius:var(--ls-radius);
  padding:26px;height:100%;position:relative;overflow:hidden;
  transition:transform .2s ease,box-shadow .24s ease,border-color .2s ease;
}
.ls-card:hover{transform:translateY(-4px);box-shadow:var(--ls-shadow-lg);border-color:var(--ls-border-strong);}
.ls-card::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--ls-neon),rgba(0,230,168,.05));opacity:.85;
}
.ls-card__icon{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:rgba(0,230,168,.1);border:1px solid var(--ls-border);color:var(--ls-neon);
  font-size:20px;margin-bottom:16px;
}
.ls-card h3{font-size:20px;font-weight:700;margin-bottom:10px;}
.ls-card p{color:var(--ls-muted);font-size:15.5px;line-height:1.85;}
.ls-card__list{margin-top:16px;display:flex;flex-direction:column;gap:9px;}
.ls-card__list li{position:relative;padding-left:20px;font-size:14.5px;color:#C4D2CD;line-height:1.7;}
.ls-card__list li::before{content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--ls-neon);}
.ls-card--accent{border-color:rgba(255,107,44,.34);background:linear-gradient(160deg,rgba(38,25,18,.9),var(--ls-surface));}
.ls-card--accent::before{background:linear-gradient(180deg,var(--ls-orange),rgba(255,107,44,.05));}
.ls-card--accent .ls-card__icon{background:rgba(255,107,44,.12);border-color:rgba(255,107,44,.3);color:var(--ls-orange);}
.ls-card__foot{margin-top:20px;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.ls-textlink{font-size:14.5px;font-weight:600;color:var(--ls-neon);display:inline-flex;align-items:center;gap:6px;}
.ls-textlink:hover{color:#5cffcb;}
.ls-grid{gap:26px 0;}

.ls-steps{margin-top:26px;}
.ls-step{
  display:flex;gap:20px;align-items:flex-start;padding:24px 26px;border-radius:var(--ls-radius);
  background:rgba(22,29,33,.7);border:1px dashed rgba(0,230,168,.22);
  transition:border-color .2s ease,background-color .2s ease,transform .2s ease;
  height:100%;
}
.ls-step:hover{border-color:var(--ls-border-strong);background:rgba(28,37,41,.92);transform:translateY(-3px);}
.ls-step__num{
  flex:0 0 46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-family:"DIN Alternate","Oswald",var(--ls-font);font-size:18px;font-weight:800;
  color:#06231a;background:var(--ls-neon);
}
.ls-step h3{font-size:18.5px;margin-bottom:8px;}
.ls-step p{color:var(--ls-muted);font-size:15px;}

/* ---------- scenes ---------- */
.ls-scenes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
.ls-scene{
  background:var(--ls-surface);border:1px solid var(--ls-border);border-radius:var(--ls-radius);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease,box-shadow .24s ease,border-color .2s ease;
}
.ls-scene:hover{transform:translateY(-4px);box-shadow:var(--ls-shadow-lg);border-color:var(--ls-border-strong);}
.ls-scene__media{position:relative;aspect-ratio:16/10;overflow:hidden;}
.ls-scene__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.ls-scene:hover .ls-scene__media img{transform:scale(1.05);}
.ls-scene__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,20,0) 40%,rgba(13,17,20,.85) 100%);}
.ls-scene__body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.ls-scene h3{font-size:18.5px;}
.ls-scene p{font-size:14.8px;color:var(--ls-muted);flex:1;}
.ls-scene__meta{font-size:13.5px;color:#8EA09A;display:flex;gap:8px;flex-wrap:wrap;}
.ls-tag{
  display:inline-flex;align-items:center;padding:4px 11px;border-radius:var(--ls-radius-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.03em;
  background:rgba(0,230,168,.12);color:var(--ls-neon);border:1px solid rgba(0,230,168,.22);
}
.ls-tag--soft{background:rgba(167,181,175,.1);color:#B9C7C1;border-color:rgba(167,181,175,.18);}
.ls-tag--price{background:rgba(255,107,44,.13);color:#FFB78E;border-color:rgba(255,107,44,.28);}
.ls-time{font-size:13px;color:#7F918B;}

/* ---------- cases ---------- */
.ls-case{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-bottom:64px;}
.ls-case:last-child{margin-bottom:0;}
.ls-case--reverse .ls-case__media{order:2;}
.ls-case__media{
  border-radius:20px;overflow:hidden;border:1px solid var(--ls-border);box-shadow:var(--ls-shadow);
  aspect-ratio:16/11;
}
.ls-case__media img{width:100%;height:100%;object-fit:cover;}
.ls-case h3{font-size:clamp(22px,2.4vw,28px);margin:14px 0 14px;}
.ls-case p{color:var(--ls-muted);font-size:16px;line-height:1.9;}
.ls-case__stats{margin:22px 0 20px;display:flex;flex-wrap:wrap;gap:26px;}
.ls-case__stats div strong{
  display:block;font-family:"DIN Alternate","Oswald",var(--ls-font);
  font-size:30px;font-weight:800;color:var(--ls-neon);line-height:1.2;
}
.ls-case__stats div span{font-size:13.5px;color:var(--ls-muted);}
.ls-quote{
  border-left:3px solid var(--ls-neon);padding:6px 0 6px 18px;color:#D3E0DB;font-size:15.5px;line-height:1.85;
  background:linear-gradient(90deg,rgba(0,230,168,.06),rgba(0,230,168,0));
}

/* ---------- pricing ---------- */
.ls-price-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}
.ls-price{
  background:var(--ls-surface);border:1px solid var(--ls-border);border-radius:20px;padding:30px 28px;
  display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .24s ease,border-color .2s ease;
}
.ls-price:hover{transform:translateY(-4px);box-shadow:var(--ls-shadow-lg);border-color:var(--ls-border-strong);}
.ls-price--pro{border-color:rgba(255,107,44,.4);position:relative;background:linear-gradient(170deg,rgba(43,27,19,.72),var(--ls-surface) 55%);}
.ls-price--pro::before{content:"";position:absolute;left:26px;right:26px;top:0;height:3px;border-radius:0 0 4px 4px;background:linear-gradient(90deg,var(--ls-orange),var(--ls-neon));}
.ls-price__name{font-size:19px;font-weight:700;}
.ls-price__desc{margin-top:6px;font-size:14.5px;color:var(--ls-muted);}
.ls-price__amount{margin:22px 0 6px;display:flex;align-items:baseline;gap:6px;}
.ls-price__amount strong{font-family:"DIN Alternate","Oswald",var(--ls-font);font-size:42px;font-weight:800;letter-spacing:.01em;color:var(--ls-text);}
.ls-price__amount small{font-size:14px;color:var(--ls-muted);}
.ls-price__list{margin:22px 0 26px;display:flex;flex-direction:column;gap:12px;flex:1;}
.ls-price__list li{position:relative;padding-left:26px;font-size:15px;color:#C9D6D1;line-height:1.7;}
.ls-price__list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--ls-neon);border-bottom:2px solid var(--ls-neon);
  transform:rotate(-45deg);border-radius:1px;
}
.ls-price--pro .ls-price__list li::before{border-color:var(--ls-orange);}
.ls-price__foot{font-size:13.5px;color:var(--ls-muted);margin-top:14px;text-align:center;}
.ls-price-strip{
  margin-top:26px;display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  padding:26px 30px;border-radius:20px;border:1px dashed rgba(0,230,168,.3);
  background:linear-gradient(90deg,rgba(0,230,168,.07),rgba(22,29,33,.6));
}
.ls-price-strip h3{font-size:20px;}
.ls-price-strip p{color:var(--ls-muted);font-size:15px;margin-top:8px;max-width:620px;}

/* ---------- news ---------- */
.ls-news-grid{margin-top:6px;}
.ls-news-card{
  background:var(--ls-surface);border:1px solid var(--ls-border);border-radius:var(--ls-radius);
  overflow:hidden;height:100%;display:flex;flex-direction:column;margin-bottom:26px;
  transition:transform .2s ease,box-shadow .24s ease,border-color .2s ease;
}
.ls-news-card:hover{transform:translateY(-4px);box-shadow:var(--ls-shadow-lg);border-color:var(--ls-border-strong);}
.ls-news-card__thumb{display:block;aspect-ratio:16/9;overflow:hidden;}
.ls-news-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.ls-news-card:hover .ls-news-card__thumb img{transform:scale(1.05);}
.ls-news-card__body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.ls-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.ls-news-card h3{font-size:18px;line-height:1.5;}
.ls-news-card h3 a:hover{color:var(--ls-neon);}
.ls-news-card p{font-size:14.8px;color:var(--ls-muted);flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.ls-empty{
  border:1px dashed rgba(167,181,175,.3);border-radius:var(--ls-radius);
  padding:52px 26px;text-align:center;background:rgba(22,29,33,.5);
}
.ls-empty strong{display:block;font-size:18px;margin-bottom:8px;}
.ls-empty span{color:var(--ls-muted);font-size:14.8px;}

/* ---------- faq ---------- */
.ls-faq{display:flex;flex-direction:column;gap:14px;}
.ls-faq-item{
  border:1px solid var(--ls-border);border-radius:16px;background:var(--ls-surface);
  overflow:hidden;transition:border-color .2s ease,background-color .2s ease;
}
.ls-faq-item.is-open{border-color:var(--ls-border-strong);background:var(--ls-surface-2);}
.ls-faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  background:transparent;border:0;color:var(--ls-text);cursor:pointer;
  padding:20px 22px;font-size:16.5px;font-weight:700;line-height:1.6;
}
.ls-faq-q:hover{color:var(--ls-neon);}
.ls-faq-q .ls-faq-num{
  flex:0 0 34px;height:34px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-family:"DIN Alternate","Oswald",var(--ls-font);font-size:15px;font-weight:800;
  background:rgba(0,230,168,.1);color:var(--ls-neon);border:1px solid var(--ls-border);
}
.ls-faq-item.is-open .ls-faq-num{background:var(--ls-neon);color:#06231a;}
.ls-faq-q .ls-faq-sign{margin-left:auto;flex:0 0 auto;font-size:20px;color:var(--ls-muted);transition:transform .24s ease,color .2s ease;}
.ls-faq-item.is-open .ls-faq-sign{transform:rotate(45deg);color:var(--ls-neon);}
.ls-faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.ls-faq-a > div{padding:0 24px 24px 72px;color:#C4D2CD;font-size:15.6px;line-height:1.8;border-left:2px solid transparent;}
.ls-faq-item.is-open .ls-faq-a > div{border-left-color:var(--ls-neon);}

/* ---------- cta ---------- */
.ls-cta{
  position:relative;border-radius:24px;overflow:hidden;
  border:1px solid var(--ls-border-strong);
  background-image:linear-gradient(105deg,rgba(9,14,16,.95),rgba(12,24,22,.82)),url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
  padding:48px 46px;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--ls-shadow-lg);
}
.ls-cta h2{font-size:clamp(24px,2.8vw,32px);max-width:640px;}
.ls-cta p{margin-top:14px;color:#C3D1CC;font-size:16px;max-width:620px;}
.ls-cta__actions{display:flex;gap:14px;flex-wrap:wrap;}
.ls-cta__contact{margin-top:16px;font-size:14px;color:var(--ls-muted);}

/* ---------- footer ---------- */
.ls-footer{background:#0A0E10;border-top:1px solid var(--ls-border);padding:66px 0 30px;margin-top:0;}
.ls-footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.ls-footer h4{font-size:15px;font-weight:700;letter-spacing:.06em;margin-bottom:18px;color:var(--ls-text);}
.ls-footer p{color:var(--ls-muted);font-size:14.5px;line-height:1.9;}
.ls-footer__brand .ls-logo{margin-bottom:16px;}
.ls-footer__links{display:flex;flex-direction:column;gap:12px;}
.ls-footer__links a{font-size:14.5px;color:var(--ls-muted);}
.ls-footer__links a:hover{color:var(--ls-neon);}
.ls-footer__bottom{
  margin-top:46px;padding-top:22px;border-top:1px solid rgba(255,255,255,.07);
  display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;
  font-size:13.5px;color:#7F918B;
}
.ls-footer__bottom a{color:#9FB1AA;}
.ls-footer__bottom a:hover{color:var(--ls-neon);}

@media screen and (max-width:1024px){
  .ls-menu{display:none;}
  .ls-burger{display:flex;}
  .ls-nav__right .ls-btn{display:none;}
  .ls-hero__inner{grid-template-columns:1fr;gap:40px;padding:64px 0 58px;}
  .ls-scenes{grid-template-columns:repeat(2,minmax(0,1fr));}
  .ls-footer__grid{grid-template-columns:1fr 1fr;gap:34px;}
  .ls-section{padding:76px 0;}
}
@media screen and (max-width:768px){
  body{font-size:16px;}
  .ls-case{grid-template-columns:1fr;gap:26px;margin-bottom:48px;}
  .ls-case--reverse .ls-case__media{order:0;}
  .ls-price-grid{grid-template-columns:1fr;}
  .ls-cta{padding:34px 24px;}
  .ls-faq-a > div{padding:0 20px 22px 22px;}
  .ls-badges{gap:18px 30px;}
}
@media screen and (max-width:520px){
  .ls-container{padding:0 16px;}
  .ls-logo{font-size:18px;}
  .ls-hero h1{font-size:30px;}
  .ls-hero__lead{font-size:16.5px;}
  .ls-scenes{grid-template-columns:1fr;}
  .ls-footer__grid{grid-template-columns:1fr;}
  .ls-section{padding:60px 0;}
  .ls-btn{width:100%;}
  .ls-hero__actions{flex-direction:column;}
  .ls-cta__actions{width:100%;flex-direction:column;}
  .ls-card{padding:22px 20px;}
  .ls-price{padding:26px 22px;}
}

/* roulang page: category1 */
:root{
  --ls-bg:#0D1114;
  --ls-surface:#161D21;
  --ls-surface-2:#1D262B;
  --ls-light:#F7FAF9;
  --ls-ink:#17201D;
  --ls-ink-2:#4B5A55;
  --ls-text:#EAF4F0;
  --ls-muted:#A7B5AF;
  --ls-mint:#00E6A8;
  --ls-orange:#FF6B2C;
  --ls-border:rgba(0,230,168,.18);
  --ls-border-strong:rgba(0,230,168,.42);
  --ls-radius:18px;
  --ls-radius-sm:12px;
  --ls-shadow:0 12px 30px rgba(0,0,0,.28);
  --ls-shadow-lg:0 20px 46px rgba(0,0,0,.42);
  --ls-glow:0 0 0 1px rgba(0,230,168,.34),0 0 24px rgba(0,230,168,.20);
  --ls-space-1:8px;
  --ls-space-2:16px;
  --ls-space-3:24px;
  --ls-space-4:32px;
  --ls-space-5:48px;
  --ls-section:96px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding:0;
  background:var(--ls-bg);
  color:var(--ls-text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--ls-radius-sm);}
a{color:inherit;text-decoration:none;transition:color .18s ease,opacity .18s ease;}
a:hover{color:var(--ls-mint);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.28;letter-spacing:.01em;color:var(--ls-text);}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--ls-mint);outline-offset:3px;border-radius:6px;}

.ls-container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.ls-header{
  position:sticky;top:0;z-index:60;
  background:rgba(13,17,20,.92);
  border-bottom:1px solid var(--ls-border);
  transition:background .25s ease,box-shadow .25s ease,backdrop-filter .25s ease;
}
.ls-header.is-scrolled{
  background:rgba(10,13,15,.96);
  backdrop-filter:blur(10px);
  box-shadow:0 8px 26px rgba(0,0,0,.45);
}
.ls-nav{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;min-height:68px;
}
.ls-logo{display:flex;align-items:center;gap:12px;}
.ls-logo__mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--ls-mint),#0b8f6c);
  color:#04140f;font-weight:900;font-size:20px;line-height:1;
  box-shadow:0 0 20px rgba(0,230,168,.35);
}
.ls-logo__text{
  display:flex;flex-direction:column;font-weight:900;font-size:20px;
  letter-spacing:.04em;color:var(--ls-text);line-height:1.15;
}
.ls-logo__text small{
  font-size:11px;font-weight:500;letter-spacing:.14em;
  color:var(--ls-muted);margin-top:3px;
}
.ls-menu{display:flex;align-items:center;gap:6px;}
.ls-menu__link{
  position:relative;display:block;padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--ls-muted);white-space:nowrap;
}
.ls-menu__link:hover{color:var(--ls-text);background:rgba(0,230,168,.07);}
.ls-menu__link.is-active{color:var(--ls-mint);}
.ls-menu__link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--ls-mint);
  box-shadow:0 0 12px rgba(0,230,168,.85);
}
.ls-nav__right{display:flex;align-items:center;gap:12px;}

.ls-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.02em;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  text-align:center;
}
.ls-btn--primary{background:var(--ls-orange);color:#fff;box-shadow:0 10px 24px rgba(255,107,44,.28);}
.ls-btn--primary:hover{background:#ff7d46;color:#fff;transform:translateY(-1px);box-shadow:0 14px 30px rgba(255,107,44,.38);}
.ls-btn--ghost{background:transparent;color:var(--ls-text);border-color:var(--ls-border-strong);}
.ls-btn--ghost:hover{color:var(--ls-mint);border-color:var(--ls-mint);transform:translateY(-1px);box-shadow:var(--ls-glow);}
.ls-btn--mint{background:var(--ls-mint);color:#04140f;box-shadow:0 10px 24px rgba(0,230,168,.25);}
.ls-btn--mint:hover{background:#1ff5b9;color:#04140f;transform:translateY(-1px);}
.ls-btn--sm{padding:10px 18px;font-size:14px;}
.ls-btn:active{transform:translateY(1px);}
.ls-btn--block{width:100%;}

.ls-burger{
  display:none;width:44px;height:44px;border-radius:12px;cursor:pointer;
  background:rgba(0,230,168,.08);border:1px solid var(--ls-border);position:relative;
}
.ls-burger span,.ls-burger span::before,.ls-burger span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;border-radius:2px;
  background:var(--ls-mint);transform:translateX(-50%);
}
.ls-burger span{top:50%;margin-top:-1px;}
.ls-burger span::before{top:-6px;}
.ls-burger span::after{top:6px;}

.ls-drawer{
  position:fixed;inset:0;z-index:80;pointer-events:none;
}
.ls-drawer__panel{
  position:absolute;top:0;right:0;height:100%;width:min(84vw,340px);
  background:var(--ls-surface);border-left:1px solid var(--ls-border);
  padding:24px;transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.ls-drawer__mask{
  position:absolute;inset:0;background:rgba(5,8,10,.7);opacity:0;transition:opacity .28s ease;
}
.ls-drawer.is-open{pointer-events:auto;}
.ls-drawer.is-open .ls-drawer__panel{transform:translateX(0);}
.ls-drawer.is-open .ls-drawer__mask{opacity:1;}
.ls-drawer__close{
  align-self:flex-end;width:44px;height:44px;border-radius:12px;cursor:pointer;
  background:rgba(255,107,44,.12);border:1px solid rgba(255,107,44,.4);color:var(--ls-orange);
  font-size:18px;line-height:1;
}
.ls-drawer__link{
  display:block;padding:14px 16px;border-radius:12px;font-weight:600;
  color:var(--ls-text);background:rgba(255,255,255,.02);border:1px solid transparent;
}
.ls-drawer__link:hover{border-color:var(--ls-border);color:var(--ls-mint);}
.ls-drawer__link.is-active{color:var(--ls-mint);border-color:var(--ls-border-strong);}
.ls-drawer__cta{margin-top:12px;}

/* ---------- hero ---------- */
.ls-crumb{
  border-bottom:1px solid rgba(255,255,255,.05);
  background:rgba(0,0,0,.25);
}
.ls-crumb__list{
  display:flex;align-items:center;gap:10px;flex-wrap:nowrap;overflow-x:auto;
  padding:14px 0;font-size:14px;color:var(--ls-muted);white-space:nowrap;
}
.ls-crumb__list li{display:flex;align-items:center;gap:10px;}
.ls-crumb__list li::after{content:"/";color:rgba(167,181,175,.45);}
.ls-crumb__list li:last-child::after{content:"";}
.ls-crumb__list .is-current{color:var(--ls-mint);font-weight:600;}

.ls-hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(105deg,rgba(9,12,14,.95) 0%,rgba(9,12,14,.78) 48%,rgba(9,12,14,.55) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--ls-border);
}
.ls-hero::after{
  content:"";position:absolute;right:-120px;bottom:-140px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(0,230,168,.22),transparent 68%);
  pointer-events:none;
}
.ls-hero__inner{
  position:relative;z-index:2;
  padding:64px 0 60px;
  display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:48px;align-items:center;
}
.ls-tagline{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 16px;border-radius:999px;margin-bottom:20px;
  background:rgba(0,230,168,.10);border:1px solid var(--ls-border-strong);
  color:var(--ls-mint);font-size:13px;font-weight:600;letter-spacing:.08em;
}
.ls-hero__title{font-size:clamp(32px,4.4vw,52px);font-weight:900;letter-spacing:.01em;}
.ls-hero__title span{display:block;margin-top:14px;font-size:clamp(15px,1.4vw,18px);font-weight:500;color:var(--ls-muted);letter-spacing:.04em;}
.ls-hero__desc{margin-top:22px;max-width:640px;color:#C9D8D3;font-size:17px;line-height:1.92;}
.ls-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.ls-hero__facts{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:38px;
  max-width:660px;
}
.ls-fact{
  padding:16px 18px;border-radius:var(--ls-radius-sm);
  background:rgba(22,29,33,.72);border:1px solid var(--ls-border);
}
.ls-fact b{display:block;font-size:24px;font-weight:900;color:var(--ls-mint);letter-spacing:.02em;font-variant-numeric:tabular-nums;}
.ls-fact span{font-size:13px;color:var(--ls-muted);}

.ls-hero__panel{
  background:rgba(13,17,20,.72);border:1px solid var(--ls-border);
  border-radius:var(--ls-radius);padding:24px;box-shadow:var(--ls-shadow-lg);
  backdrop-filter:blur(6px);
}
.ls-hero__panel h3{font-size:17px;margin-bottom:6px;}
.ls-hero__panel p{font-size:14px;color:var(--ls-muted);margin-bottom:18px;}
.ls-scoreline{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;border-radius:12px;background:rgba(0,230,168,.06);
  border:1px solid var(--ls-border);margin-bottom:10px;
}
.ls-scoreline b{font-size:22px;font-weight:900;color:var(--ls-text);font-variant-numeric:tabular-nums;letter-spacing:.04em;}
.ls-scoreline span{font-size:14px;color:var(--ls-muted);}
.ls-scoreline em{font-style:normal;font-size:13px;color:var(--ls-mint);}

/* ---------- section base ---------- */
.ls-section{padding:var(--ls-section) 0;}
.ls-section--tight{padding:72px 0;}
.ls-section--light{background:var(--ls-light);color:var(--ls-ink);}
.ls-section--light h2,.ls-section--light h3,.ls-section--light h4{color:var(--ls-ink);}
.ls-section--light p{color:var(--ls-ink-2);}
.ls-section--soft{background:var(--ls-surface);border-top:1px solid var(--ls-border);border-bottom:1px solid var(--ls-border);}
.ls-head{max-width:760px;margin-bottom:44px;}
.ls-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.ls-eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.16em;
  color:var(--ls-mint);margin-bottom:14px;text-transform:uppercase;
}
.ls-h2{font-size:clamp(26px,3vw,36px);}
.ls-head p{margin-top:16px;color:var(--ls-muted);font-size:16px;line-height:1.9;}
.ls-section--light .ls-head p{color:var(--ls-ink-2);}

/* ---------- layout: toc + cards ---------- */
.ls-main-grid{
  display:grid;grid-template-columns:250px minmax(0,1fr);gap:44px;align-items:start;
}
.ls-toc{
  position:sticky;top:92px;
  background:var(--ls-surface);border:1px solid var(--ls-border);
  border-radius:var(--ls-radius);padding:22px;
}
.ls-toc h3{font-size:15px;letter-spacing:.06em;margin-bottom:14px;color:var(--ls-mint);}
.ls-toc__list li+li{margin-top:4px;}
.ls-toc__list a{
  display:block;padding:9px 12px;border-radius:10px;font-size:14px;
  color:var(--ls-muted);border-left:2px solid transparent;
}
.ls-toc__list a:hover{color:var(--ls-mint);background:rgba(0,230,168,.07);border-left-color:var(--ls-mint);}
.ls-toc__note{margin-top:18px;font-size:13px;color:var(--ls-muted);line-height:1.75;}

.ls-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.ls-card{
  position:relative;background:var(--ls-surface);border:1px solid var(--ls-border);
  border-radius:var(--ls-radius);padding:26px;overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.ls-card::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--ls-mint),rgba(0,230,168,0));
}
.ls-card:hover{transform:translateY(-4px);border-color:var(--ls-border-strong);box-shadow:var(--ls-shadow-lg),0 0 0 1px rgba(0,230,168,.22);}
.ls-card__icon{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:rgba(0,230,168,.10);border:1px solid var(--ls-border);
  color:var(--ls-mint);font-size:19px;margin-bottom:18px;
}
.ls-card h3{font-size:20px;margin-bottom:10px;}
.ls-card p{color:var(--ls-muted);font-size:15px;line-height:1.85;}
.ls-card__list{margin:18px 0 20px;}
.ls-card__list li{
  position:relative;padding-left:20px;font-size:14px;color:#C9D8D3;line-height:1.8;
}
.ls-card__list li+li{margin-top:6px;}
.ls-card__list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:2px;border-radius:2px;background:var(--ls-mint);
}
.ls-card__link{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--ls-mint);
}
.ls-card__link:hover{gap:12px;color:#1ff5b9;}
.ls-card--media{padding:0;}
.ls-card--media img{width:100%;height:190px;object-fit:cover;border-radius:0;}
.ls-card--media .ls-card__body{padding:24px 26px 26px;}
.ls-card--wide{grid-column:1 / -1;}

/* ---------- compare table ---------- */
.ls-table-wrap{
  overflow-x:auto;border-radius:var(--ls-radius);border:1px solid var(--ls-border);
  background:var(--ls-surface);box-shadow:var(--ls-shadow);
}
.ls-table{width:100%;border-collapse:collapse;min-width:760px;font-size:15px;}
.ls-table thead th{
  background:#0A0F12;color:var(--ls-text);font-weight:700;font-size:15px;
  text-align:left;padding:18px 22px;border-bottom:1px solid var(--ls-border);white-space:nowrap;
}
.ls-table thead th:first-child{color:var(--ls-mint);}
.ls-table tbody td{
  padding:16px 22px;color:#C9D8D3;border-bottom:1px solid rgba(255,255,255,.05);
  vertical-align:top;
}
.ls-table tbody tr:nth-child(even){background:rgba(255,255,255,.018);}
.ls-table tbody tr:hover{background:rgba(0,230,168,.07);}
.ls-table tbody td:first-child{color:var(--ls-text);font-weight:600;}
.ls-table tbody tr:last-child td{border-bottom:none;}
.ls-table .ls-chip{
  display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;
  background:rgba(0,230,168,.12);color:var(--ls-mint);border:1px solid var(--ls-border);
}
.ls-table .ls-chip--orange{background:rgba(255,107,44,.14);color:var(--ls-orange);border-color:rgba(255,107,44,.35);}

/* ---------- flow ---------- */
.ls-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
.ls-flow__item{
  position:relative;padding:26px 22px;border-radius:var(--ls-radius);
  background:var(--ls-surface);border:1px solid var(--ls-border);
  transition:transform .2s ease,border-color .2s ease;
}
.ls-flow__item:hover{transform:translateY(-4px);border-color:var(--ls-border-strong);}
.ls-flow__num{
  font-size:30px;font-weight:900;color:transparent;-webkit-text-stroke:1.4px var(--ls-mint);
  letter-spacing:.04em;font-variant-numeric:tabular-nums;line-height:1;
}
.ls-flow__item h3{font-size:18px;margin:14px 0 8px;}
.ls-flow__item p{font-size:14px;color:var(--ls-muted);line-height:1.8;}

/* ---------- stats strip ---------- */
.ls-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;
  border:1px solid var(--ls-border);border-radius:var(--ls-radius);
  background:var(--ls-surface);overflow:hidden;
}
.ls-strip__item{padding:30px 26px;border-right:1px solid rgba(255,255,255,.06);}
.ls-strip__item:last-child{border-right:none;}
.ls-strip__item b{
  display:block;font-size:34px;font-weight:900;color:var(--ls-mint);
  letter-spacing:.02em;font-variant-numeric:tabular-nums;line-height:1.1;
}
.ls-strip__item span{display:block;font-size:14px;color:var(--ls-muted);margin-top:8px;}

/* ---------- faq ---------- */
.ls-faq{max-width:900px;margin:0 auto;}
.ls-faq__item{
  border:1px solid var(--ls-border);border-radius:var(--ls-radius-sm);
  background:var(--ls-surface);margin-bottom:14px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.ls-faq__item.is-open{border-color:var(--ls-border-strong);box-shadow:var(--ls-glow);}
.ls-faq__q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:20px 22px;background:transparent;border:none;cursor:pointer;
  color:var(--ls-text);font-size:16px;font-weight:700;
}
.ls-faq__q:hover{color:var(--ls-mint);}
.ls-faq__q i:first-child{
  font-style:normal;font-size:13px;font-weight:900;color:var(--ls-mint);
  min-width:26px;font-variant-numeric:tabular-nums;
}
.ls-faq__q i:last-child{margin-left:auto;color:var(--ls-mint);transition:transform .25s ease;font-size:14px;}
.ls-faq__item.is-open .ls-faq__q i:last-child{transform:rotate(180deg);}
.ls-faq__a{
  max-height:0;overflow:hidden;transition:max-height .32s ease;
}
.ls-faq__a p{
  padding:0 22px 22px 64px;margin:0;color:var(--ls-muted);font-size:15px;line-height:1.9;
}
.ls-faq__item.is-open .ls-faq__a{max-height:520px;}

/* ---------- cta ---------- */
.ls-cta{
  position:relative;overflow:hidden;
  background:linear-gradient(115deg,#101719 0%,#131C20 55%,#0D1114 100%);
  border:1px solid var(--ls-border-strong);border-radius:22px;
  padding:44px 46px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--ls-shadow-lg);
}
.ls-cta::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 240px at 88% 20%,rgba(0,230,168,.16),transparent 70%);
  pointer-events:none;
}
.ls-cta__text{position:relative;z-index:2;max-width:620px;}
.ls-cta__text h2{font-size:clamp(24px,2.6vw,32px);}
.ls-cta__text p{margin-top:14px;color:var(--ls-muted);font-size:16px;}
.ls-cta__actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.ls-footer{
  background:#0A0E11;border-top:1px solid var(--ls-border);padding:64px 0 28px;margin-top:0;
}
.ls-footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.ls-footer h4{font-size:15px;color:var(--ls-text);margin-bottom:18px;letter-spacing:.06em;}
.ls-footer p{font-size:14px;color:var(--ls-muted);line-height:1.85;}
.ls-footer__brand p{margin-top:18px;max-width:380px;}
.ls-footer__links li+li{margin-top:10px;}
.ls-footer__links a{font-size:14px;color:var(--ls-muted);}
.ls-footer__links a:hover{color:var(--ls-mint);}
.ls-footer__bottom{
  margin-top:46px;padding-top:22px;border-top:1px solid rgba(255,255,255,.06);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(167,181,175,.8);
}

/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  :root{--ls-section:76px;}
  .ls-menu{display:none;}
  .ls-burger{display:block;}
  .ls-hero__inner{grid-template-columns:1fr;gap:34px;padding:56px 0 52px;}
  .ls-main-grid{grid-template-columns:1fr;gap:30px;}
  .ls-toc{position:static;}
  .ls-flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .ls-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .ls-strip__item:nth-child(2){border-right:none;}
  .ls-strip__item:nth-child(1),.ls-strip__item:nth-child(2){border-bottom:1px solid rgba(255,255,255,.06);}
  .ls-footer__grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media screen and (max-width:768px){
  body{font-size:16px;}
  .ls-hero__facts{grid-template-columns:1fr 1fr;}
  .ls-cards{grid-template-columns:1fr;}
  .ls-cta{flex-direction:column;align-items:flex-start;padding:34px 26px;}
  .ls-cta__actions{width:100%;}
  .ls-cta__actions .ls-btn{flex:1 1 auto;}
  .ls-faq__a p{padding-left:22px;}
}
@media screen and (max-width:520px){
  .ls-container{padding:0 18px;}
  :root{--ls-section:60px;}
  .ls-hero__facts{grid-template-columns:1fr;}
  .ls-flow{grid-template-columns:1fr;}
  .ls-strip{grid-template-columns:1fr;}
  .ls-strip__item{border-right:none;border-bottom:1px solid rgba(255,255,255,.06);}
  .ls-footer__grid{grid-template-columns:1fr;}
  .ls-btn{width:100%;}
  .ls-btn--sm{width:auto;}
  .ls-logo__text{font-size:18px;}
  .ls-logo__text small{font-size:10px;letter-spacing:.08em;}
}

/* roulang page: article */
:root{
  --ls-primary:#00E6A8;
  --ls-primary-dim:#00B98A;
  --ls-primary-soft:rgba(0,230,168,.12);
  --ls-accent:#FF6B2C;
  --ls-bg:#0D1114;
  --ls-bg-deep:#0A0E10;
  --ls-surface:#161D21;
  --ls-surface-2:#1D262B;
  --ls-text:#EAF4F0;
  --ls-muted:#A7B5AF;
  --ls-border:rgba(0,230,168,.18);
  --ls-paper:#F7FAF9;
  --ls-ink:#17201D;
  --ls-ink-muted:#4B5A55;
  --ls-radius:18px;
  --ls-radius-sm:12px;
  --ls-shadow:0 12px 30px rgba(0,0,0,.28);
  --ls-shadow-lg:0 22px 48px rgba(0,0,0,.42);
  --ls-glow:0 0 0 1px rgba(0,230,168,.42), 0 0 24px rgba(0,230,168,.26);
  --ls-container:1240px;
  --ls-font:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --ls-font-read:"Noto Serif SC",Georgia,"Songti SC","SimSun",serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body.ls-article-page{
  margin:0;padding:0;background:var(--ls-bg);color:var(--ls-text);
  font-family:var(--ls-font);font-size:17px;line-height:1.85;
  letter-spacing:.02em;overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4,p{margin:0;}
.ls-container{width:100%;max-width:var(--ls-container);margin:0 auto;padding:0 24px;}

/* ---------- 导航 ---------- */
.ls-header{
  position:sticky;top:0;z-index:80;background:rgba(13,17,20,.92);
  border-bottom:1px solid var(--ls-border);backdrop-filter:blur(10px);
  transition:background .25s ease,box-shadow .25s ease;
}
.ls-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(0,230,168,.8),rgba(255,107,44,.5),transparent);
  pointer-events:none;
}
.ls-header.is-stuck{background:rgba(8,11,13,.97);box-shadow:0 10px 28px rgba(0,0,0,.5);}
.ls-nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:70px;}
.ls-logo{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.ls-logo__mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  font-weight:800;font-size:19px;color:#04231B;
  background:linear-gradient(135deg,#00E6A8,#2BFFC4);
  box-shadow:0 0 20px rgba(0,230,168,.38);
}
.ls-logo__text{display:flex;flex-direction:column;font-weight:800;font-size:19px;line-height:1.05;color:var(--ls-text);letter-spacing:.01em;}
.ls-logo__text small{font-size:11px;font-weight:500;letter-spacing:.14em;color:var(--ls-muted);margin-top:3px;}
.ls-menu{display:flex;align-items:center;gap:4px;list-style:none;}
.ls-menu__link{
  position:relative;display:inline-block;padding:10px 15px;border-radius:10px;
  font-size:15px;color:var(--ls-muted);transition:color .18s ease,background .18s ease;
}
.ls-menu__link:hover{color:var(--ls-text);background:rgba(255,255,255,.05);}
.ls-menu__link.is-active{color:var(--ls-primary);}
.ls-menu__link.is-active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;border-radius:2px;
  background:var(--ls-primary);box-shadow:0 0 12px rgba(0,230,168,.95);
}
.ls-nav__right{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

/* ---------- 按钮 ---------- */
.ls-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid transparent;border-radius:var(--ls-radius-sm);
  font-size:15px;font-weight:700;line-height:1.2;cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.ls-btn--primary{background:var(--ls-primary);color:#05231B;box-shadow:0 10px 24px rgba(0,230,168,.24);}
.ls-btn--primary:hover{background:#2BF5BC;transform:translateY(-1px);box-shadow:0 14px 30px rgba(0,230,168,.34);color:#05231B;}
.ls-btn--accent{background:var(--ls-accent);color:#fff;box-shadow:0 10px 24px rgba(255,107,44,.28);}
.ls-btn--accent:hover{background:#FF8149;transform:translateY(-1px);color:#fff;}
.ls-btn--ghost{background:transparent;color:var(--ls-text);border-color:rgba(255,255,255,.16);}
.ls-btn--ghost:hover{border-color:rgba(0,230,168,.6);color:var(--ls-primary);transform:translateY(-1px);}
.ls-btn--sm{padding:9px 16px;font-size:14px;}
.ls-btn:focus-visible{outline:2px solid var(--ls-primary);outline-offset:3px;}
.ls-btn:active{transform:translateY(1px);}

/* ---------- 汉堡与抽屉 ---------- */
.ls-burger{
  display:none;position:relative;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--ls-border);background:rgba(255,255,255,.03);cursor:pointer;
}
.ls-burger span,.ls-burger span::before,.ls-burger span::after{
  position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--ls-text);
  transform:translateX(-50%);transition:transform .2s ease;
}
.ls-burger span{top:50%;margin-top:-1px;}
.ls-burger span::before{content:"";top:-6px;}
.ls-burger span::after{content:"";top:6px;}
.ls-drawer{position:fixed;inset:0;z-index:120;display:none;}
.ls-drawer.is-open{display:block;}
.ls-drawer__overlay{position:absolute;inset:0;background:rgba(4,7,9,.75);backdrop-filter:blur(3px);}
.ls-drawer__panel{
  position:absolute;top:0;right:0;width:min(86vw,340px);height:100%;
  background:var(--ls-surface);border-left:1px solid var(--ls-border);
  padding:22px;display:flex;flex-direction:column;gap:8px;
  box-shadow:var(--ls-shadow-lg);overflow-y:auto;
}
.ls-drawer__close{
  align-self:flex-end;width:44px;height:44px;border-radius:12px;cursor:pointer;
  border:1px solid var(--ls-border);background:rgba(255,255,255,.04);
  color:var(--ls-text);font-size:22px;line-height:1;
}
.ls-drawer__panel ul{list-style:none;margin:14px 0 18px;}
.ls-drawer__panel li{margin-bottom:6px;}
.ls-drawer__panel a.ls-drawer__link{
  display:block;padding:13px 14px;border-radius:12px;font-size:16px;color:var(--ls-muted);
  border:1px solid transparent;min-height:44px;
}
.ls-drawer__panel a.ls-drawer__link:hover{color:var(--ls-primary);background:var(--ls-primary-soft);border-color:var(--ls-border);}
.ls-drawer__panel a.ls-drawer__link.is-active{color:var(--ls-primary);background:var(--ls-primary-soft);border-color:var(--ls-border);}

/* ---------- 文章首屏 ---------- */
.ls-article-hero{position:relative;padding:60px 0 46px;background:var(--ls-bg-deep);overflow:hidden;}
.ls-article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.16;
}
.ls-article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(880px 420px at 10% 0%,rgba(0,230,168,.18),transparent 62%),
             linear-gradient(180deg,rgba(10,14,16,.35),rgba(13,17,20,.96));
}
.ls-article-hero .ls-container{position:relative;z-index:2;}
.ls-crumbs{
  display:flex;align-items:center;gap:9px;list-style:none;margin-bottom:26px;
  font-size:14px;color:var(--ls-muted);overflow-x:auto;white-space:nowrap;padding-bottom:4px;
}
.ls-crumbs li{display:flex;align-items:center;gap:9px;}
.ls-crumbs li+li::before{content:"/";color:rgba(167,181,175,.4);}
.ls-crumbs a{color:var(--ls-muted);}
.ls-crumbs a:hover{color:var(--ls-primary);}
.ls-crumbs .is-current{color:var(--ls-primary);max-width:46vw;overflow:hidden;text-overflow:ellipsis;}
.ls-article-head{max-width:900px;}
.ls-article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.ls-tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--ls-primary);background:var(--ls-primary-soft);border:1px solid var(--ls-border);
}
.ls-tag--muted{color:var(--ls-muted);background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.09);}
.ls-article-title{
  font-size:clamp(30px,4.2vw,48px);line-height:1.24;font-weight:800;letter-spacing:.01em;
  color:var(--ls-text);margin-bottom:20px;
}
.ls-article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--ls-muted);}
.ls-article-meta span{display:inline-flex;align-items:center;gap:7px;}
.ls-article-meta i{color:var(--ls-primary);font-size:13px;}
.ls-article-cover{
  margin:34px 0 0;border-radius:var(--ls-radius);overflow:hidden;
  border:1px solid var(--ls-border);box-shadow:var(--ls-shadow-lg);
}
.ls-article-cover img{width:100%;aspect-ratio:16/8;object-fit:cover;}

/* ---------- 正文布局 ---------- */
.ls-article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 290px;
  gap:42px;align-items:start;padding:58px 0 24px;
}
.ls-article-body{
  background:var(--ls-paper);color:var(--ls-ink);border-radius:var(--ls-radius);
  padding:46px 50px;box-shadow:var(--ls-shadow-lg);
  font-family:var(--ls-font-read);
}
.ls-article-body>*:first-child{margin-top:0;}
.ls-article-body p{font-size:18px;line-height:1.95;color:var(--ls-ink);margin:0 0 1.2em;}
.ls-article-body h2{
  font-family:var(--ls-font);font-size:clamp(22px,2.3vw,28px);line-height:1.4;font-weight:800;
  color:#0E1714;margin:2.1em 0 .7em;padding-left:15px;border-left:4px solid var(--ls-primary);
  scroll-margin-top:100px;
}
.ls-article-body h3{
  font-family:var(--ls-font);font-size:20px;line-height:1.5;font-weight:700;
  color:#14201C;margin:1.8em 0 .6em;scroll-margin-top:100px;
}
.ls-article-body h4{font-family:var(--ls-font);font-size:17px;font-weight:700;color:#14201C;margin:1.5em 0 .5em;}
.ls-article-body ul,.ls-article-body ol{margin:0 0 1.3em 1.3em;padding:0;}
.ls-article-body li{font-size:17px;line-height:1.9;margin-bottom:.45em;color:#22312C;}
.ls-article-body a{color:#0A8E6B;text-decoration:underline;text-underline-offset:3px;}
.ls-article-body a:hover{color:#00A87B;}
.ls-article-body img{border-radius:14px;margin:1.5em 0;box-shadow:0 10px 26px rgba(23,32,29,.14);}
.ls-article-body figure{margin:1.5em 0;}
.ls-article-body figcaption{font-family:var(--ls-font);font-size:13px;color:var(--ls-ink-muted);text-align:center;margin-top:8px;}
.ls-article-body blockquote{
  margin:1.6em 0;padding:18px 24px;border-left:4px solid var(--ls-primary);
  background:#E9F6F1;border-radius:0 14px 14px 0;color:#233430;
}
.ls-article-body blockquote p{margin:0;font-size:17px;}
.ls-article-body hr{border:none;border-top:1px solid #DCE7E2;margin:2em 0;}
.ls-article-body table{
  width:100%;border-collapse:collapse;margin:1.6em 0;font-size:16px;
  font-family:var(--ls-font);display:block;overflow-x:auto;
}
.ls-article-body th{background:#17201D;color:#EAF4F0;text-align:left;padding:12px 15px;white-space:nowrap;}
.ls-article-body td{padding:12px 15px;border-bottom:1px solid #DCE7E2;color:#22312C;}
.ls-article-body tbody tr:nth-child(even) td{background:#EFF6F3;}
.ls-article-body tbody tr:hover td{background:#E3F3EC;}
.ls-article-body code{background:#E6F1ED;color:#0B6B52;padding:2px 6px;border-radius:6px;font-size:.92em;}
.ls-article-body pre{
  background:#101815;color:#D9F5EA;padding:18px 20px;border-radius:14px;
  overflow-x:auto;margin:1.5em 0;font-size:15px;line-height:1.75;
}
.ls-article-body pre code{background:none;color:inherit;padding:0;}

.ls-notfound{
  background:var(--ls-paper);color:var(--ls-ink);border-radius:var(--ls-radius);
  padding:60px 40px;text-align:center;box-shadow:var(--ls-shadow-lg);
}
.ls-notfound h2{font-size:26px;font-weight:800;margin-bottom:14px;color:#0E1714;}
.ls-notfound p{font-size:16px;color:var(--ls-ink-muted);line-height:1.9;margin-bottom:26px;}

.ls-article-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}

/* ---------- 目录 ---------- */
.ls-article-aside{position:relative;}
.ls-toc{
  position:sticky;top:96px;background:var(--ls-surface);border:1px solid var(--ls-border);
  border-radius:var(--ls-radius);padding:20px 20px 16px;box-shadow:var(--ls-shadow);
}
.ls-toc__toggle{
  display:none;width:100%;align-items:center;justify-content:space-between;
  padding:12px 14px;border-radius:12px;border:1px solid var(--ls-border);
  background:rgba(255,255,255,.03);color:var(--ls-primary);font-weight:700;font-size:15px;cursor:pointer;
}
.ls-toc__title{
  font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--ls-primary);
  padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid rgba(255,255,255,.07);
}
.ls-toc__list{list-style:none;max-height:54vh;overflow-y:auto;}
.ls-toc__list a{
  display:block;padding:8px 10px;font-size:14px;line-height:1.65;color:var(--ls-muted);
  border-left:2px solid transparent;border-radius:0 8px 8px 0;transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.ls-toc__list a:hover{color:var(--ls-text);background:rgba(255,255,255,.05);}
.ls-toc__list a.is-current{color:var(--ls-primary);border-left-color:var(--ls-primary);background:var(--ls-primary-soft);}
.ls-toc__list a.ls-toc__sub{padding-left:22px;font-size:13px;}
.ls-toc__empty{display:none;font-size:14px;color:var(--ls-muted);line-height:1.8;}

/* ---------- 相关推荐 ---------- */
.ls-related{padding:56px 0 10px;}
.ls-section-head{margin-bottom:28px;}
.ls-section-head h2{font-size:clamp(22px,2.5vw,30px);font-weight:800;color:var(--ls-text);margin-bottom:8px;}
.ls-section-head p{font-size:15px;color:var(--ls-muted);}
.ls-related__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.ls-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--ls-surface);border:1px solid var(--ls-border);border-radius:var(--ls-radius);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.ls-card:hover{transform:translateY(-4px);border-color:rgba(0,230,168,.5);box-shadow:0 0 0 1px rgba(0,230,168,.22),0 18px 40px rgba(0,0,0,.45);}
.ls-card__thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--ls-surface-2);}
.ls-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.ls-card:hover .ls-card__thumb img{transform:scale(1.05);}
.ls-card__body{display:flex;flex-direction:column;gap:10px;padding:20px 22px 24px;flex:1;}
.ls-card__meta{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--ls-muted);}
.ls-card__title{font-size:18px;font-weight:700;line-height:1.55;color:var(--ls-text);transition:color .18s ease;}
.ls-card:hover .ls-card__title{color:var(--ls-primary);}
.ls-card__desc{font-size:14px;line-height:1.8;color:var(--ls-muted);}
.ls-empty{
  padding:44px 30px;text-align:center;border:1px dashed var(--ls-border);
  border-radius:var(--ls-radius);color:var(--ls-muted);background:rgba(255,255,255,.02);
}
.ls-empty i{display:block;font-size:26px;color:var(--ls-primary);margin-bottom:12px;}
.ls-empty p{font-size:15px;line-height:1.85;}

/* ---------- CTA ---------- */
.ls-cta-wrap{padding:64px 0 96px;}
.ls-cta{
  position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;
  gap:30px;padding:42px 44px;border-radius:22px;border:1px solid var(--ls-border);
  background:linear-gradient(135deg,#131C20,#0A0E11);box-shadow:var(--ls-shadow-lg);
}
.ls-cta::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(620px 260px at 88% 10%,rgba(255,107,44,.2),transparent 62%),
             radial-gradient(520px 220px at 4% 90%,rgba(0,230,168,.16),transparent 60%);
}
.ls-cta>div{position:relative;z-index:2;}
.ls-cta h2{font-size:clamp(21px,2.4vw,28px);font-weight:800;color:var(--ls-text);margin-bottom:10px;}
.ls-cta p{font-size:15px;line-height:1.85;color:var(--ls-muted);max-width:560px;}
.ls-cta__actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- 页脚 ---------- */
.ls-footer{background:var(--ls-bg-deep);border-top:1px solid var(--ls-border);padding:64px 0 26px;color:var(--ls-muted);}
.ls-footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px;}
.ls-footer h4{font-size:16px;font-weight:700;color:var(--ls-text);margin-bottom:16px;}
.ls-footer p{font-size:14px;line-height:1.85;color:var(--ls-muted);margin-bottom:10px;}
.ls-footer__brand p{margin-top:16px;max-width:380px;}
.ls-footer__links{list-style:none;}
.ls-footer__links li{margin-bottom:10px;}
.ls-footer__links a{font-size:14px;color:var(--ls-muted);}
.ls-footer__links a:hover{color:var(--ls-primary);}
.ls-footer__bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.07);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(167,181,175,.82);
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .ls-article-layout{grid-template-columns:1fr;gap:26px;padding-top:40px;}
  .ls-toc{position:static;padding:16px;}
  .ls-toc__toggle{display:flex;}
  .ls-toc__title{display:none;}
  .ls-toc__content{display:none;padding-top:14px;}
  .ls-toc.is-open .ls-toc__content{display:block;}
  .ls-footer__grid{grid-template-columns:1.4fr 1fr 1fr;}
}
@media (max-width:960px){
  .ls-menu{display:none;}
  .ls-burger{display:block;}
  .ls-nav{height:66px;}
}
@media (max-width:860px){
  .ls-related__grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .ls-footer__grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:768px){
  body.ls-article-page{font-size:16px;}
  .ls-article-hero{padding:42px 0 32px;}
  .ls-article-cover img{aspect-ratio:16/10;}
  .ls-article-body{padding:30px 22px;}
  .ls-article-body p{font-size:17px;line-height:1.9;}
  .ls-cta{flex-direction:column;align-items:flex-start;padding:30px 24px;}
  .ls-crumbs .is-current{max-width:60vw;}
}
@media (max-width:600px){
  .ls-container{padding:0 18px;}
  .ls-related__grid{grid-template-columns:1fr;}
  .ls-footer__grid{grid-template-columns:1fr;gap:26px;}
  .ls-article-title{font-size:27px;}
  .ls-article-body{padding:24px 18px;border-radius:14px;}
  .ls-article-actions .ls-btn{width:100%;}
  .ls-logo__text small{display:none;}
}

/* roulang page: category2 */
:root{
  --ls-bg:#0D1114;
  --ls-surface:#161D21;
  --ls-surface-2:#1D262B;
  --ls-deep:#0A0E10;
  --ls-primary:#00E6A8;
  --ls-primary-dim:rgba(0,230,168,.12);
  --ls-accent:#FF6B2C;
  --ls-text:#EAF4F0;
  --ls-muted:#A7B5AF;
  --ls-line:rgba(0,230,168,.18);
  --ls-line-soft:rgba(255,255,255,.07);
  --ls-radius:18px;
  --ls-radius-sm:12px;
  --ls-shadow:0 12px 30px rgba(0,0,0,.28);
  --ls-shadow-lg:0 18px 42px rgba(0,0,0,.42);
  --ls-num:"Bahnschrift","DIN Alternate","Arial Narrow","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ls-bg);
  color:var(--ls-text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-weight:800;letter-spacing:.02em;line-height:1.3;margin:0}
p{margin:0 0 1em}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background .18s ease}
img{display:block;max-width:100%;object-fit:cover;border-radius:0}
ul{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
summary{list-style:none}
summary::-webkit-details-marker{display:none}
:focus-visible{outline:2px solid var(--ls-primary);outline-offset:3px;border-radius:6px}
section[id]{scroll-margin-top:150px}

.ls-container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.ls-section{padding:92px 0}
.ls-section--tight{padding:68px 0}

/* ---------- 导航 ---------- */
.ls-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:70px;display:flex;align-items:center;
  background:rgba(13,17,20,.82);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ls-line-soft);
  transition:background .25s ease,box-shadow .25s ease;
}
.ls-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(0,230,168,.65),transparent);
  opacity:.75;
}
.ls-header.is-scrolled{background:rgba(8,11,13,.96);box-shadow:0 12px 32px rgba(0,0,0,.45)}
.ls-nav{display:flex;align-items:center;gap:26px;width:100%}
.ls-logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.ls-logo__mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  font-weight:800;font-size:19px;color:#04211A;
  background:linear-gradient(135deg,#00E6A8,#31F7C0);
  box-shadow:0 0 18px rgba(0,230,168,.35);
}
.ls-logo__text{display:flex;flex-direction:column;line-height:1.15;font-weight:800;font-size:19px}
.ls-logo__text small{font-size:11px;font-weight:400;color:var(--ls-muted);letter-spacing:.1em;margin-top:3px}
.ls-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.ls-menu__link{
  position:relative;display:inline-block;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--ls-muted);transition:color .18s ease,background .18s ease;
}
.ls-menu__link:hover{color:var(--ls-text);background:rgba(0,230,168,.07)}
.ls-menu__link.is-active{color:var(--ls-primary)}
.ls-menu__link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--ls-primary);box-shadow:0 0 12px rgba(0,230,168,.85);
}
.ls-nav__right{display:flex;align-items:center;gap:14px;flex-shrink:0}
.ls-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:12px;padding:13px 24px;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.ls-btn--sm{padding:10px 18px;font-size:14px}
.ls-btn--primary{background:var(--ls-primary);color:#04211A;box-shadow:0 10px 24px rgba(0,230,168,.24)}
.ls-btn--primary:hover{background:#2BF3BD;transform:translateY(-1px)}
.ls-btn--accent{background:var(--ls-accent);color:#fff;box-shadow:0 10px 24px rgba(255,107,44,.28)}
.ls-btn--accent:hover{background:#FF8149;transform:translateY(-1px)}
.ls-btn--ghost{background:transparent;border-color:rgba(0,230,168,.5);color:var(--ls-primary)}
.ls-btn--ghost:hover{background:rgba(0,230,168,.1);transform:translateY(-1px)}
.ls-btn:active{transform:translateY(1px)}
.ls-burger{
  display:none;position:relative;width:46px;height:46px;border-radius:12px;
  border:1px solid var(--ls-line);background:rgba(0,230,168,.06);
}
.ls-burger span{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:20px;height:2px;background:var(--ls-primary);border-radius:2px}
.ls-burger span::before,.ls-burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ls-primary);border-radius:2px}
.ls-burger span::before{top:-6px}
.ls-burger span::after{top:6px}

/* 抽屉 */
.ls-drawer{position:fixed;inset:0;z-index:80;pointer-events:none}
.ls-drawer__mask{position:absolute;inset:0;background:rgba(4,7,9,.74);opacity:0;transition:opacity .25s ease}
.ls-drawer__panel{
  position:absolute;top:0;right:0;bottom:0;width:min(86vw,340px);
  background:#111A1E;border-left:1px solid var(--ls-line);
  padding:26px 22px;display:flex;flex-direction:column;gap:8px;
  transform:translateX(102%);transition:transform .28s ease;overflow-y:auto;
}
.ls-drawer.is-open{pointer-events:auto}
.ls-drawer.is-open .ls-drawer__mask{opacity:1}
.ls-drawer.is-open .ls-drawer__panel{transform:none}
.ls-drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.ls-drawer__close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--ls-line);
  color:var(--ls-primary);font-size:22px;line-height:1;display:grid;place-items:center;
}
.ls-drawer__close:hover{background:rgba(0,230,168,.1)}
.ls-drawer__link{
  display:flex;align-items:center;min-height:48px;padding:12px 14px;border-radius:12px;
  font-size:16px;color:var(--ls-muted);border:1px solid transparent;
}
.ls-drawer__link:hover{color:var(--ls-text);background:rgba(0,230,168,.07)}
.ls-drawer__link.is-active{color:var(--ls-primary);border-color:var(--ls-line);background:rgba(0,230,168,.08)}
.ls-drawer__cta{margin-top:16px}

/* ---------- 横幅 ---------- */
.ls-hero{
  position:relative;overflow:hidden;
  padding:148px 0 74px;
  background:#0C1013 url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.ls-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(104deg,rgba(8,12,14,.96) 0%,rgba(8,12,14,.86) 42%,rgba(8,12,14,.46) 100%);
}
.ls-hero::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(0,230,168,.4) 1px,transparent 1px);
  background-size:22px 22px;opacity:.16;
  -webkit-mask-image:linear-gradient(118deg,#000 12%,transparent 62%);
  mask-image:linear-gradient(118deg,#000 12%,transparent 62%);
}
.ls-hero__slash{
  position:absolute;top:0;right:-6%;width:42%;height:100%;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,rgba(0,230,168,.16),rgba(0,230,168,0));
  clip-path:polygon(38% 0,100% 0,62% 100%,0 100%);opacity:.65;
}
.ls-hero__inner{position:relative;z-index:2;max-width:840px}
.ls-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.18em;color:var(--ls-primary);margin-bottom:18px;
}
.ls-eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:var(--ls-primary);box-shadow:0 0 10px rgba(0,230,168,.8)}
.ls-hero h1{
  font-size:clamp(30px,4.5vw,52px);line-height:1.22;margin:0 0 20px;
  text-shadow:0 6px 24px rgba(0,0,0,.5);
}
.ls-hero h1 em{font-style:normal;color:var(--ls-primary)}
.ls-hero__lead{font-size:18px;line-height:1.85;color:#C6D4CF;max-width:660px;margin:0 0 30px}
.ls-hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.ls-hero__points{
  position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:34px;
  margin-top:44px;padding-top:26px;border-top:1px solid rgba(0,230,168,.16);
}
.ls-hero__point{display:flex;flex-direction:column;gap:4px;min-width:150px}
.ls-hero__point b{font-size:17px;color:var(--ls-text);font-weight:700}
.ls-hero__point span{font-size:14px;color:var(--ls-muted)}

/* ---------- 锚点栏 ---------- */
.ls-anchors{
  position:sticky;top:70px;z-index:50;
  background:rgba(11,15,18,.94);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-top:1px solid rgba(255,255,255,.04);
  border-bottom:1px solid var(--ls-line);
}
.ls-anchors__inner{display:flex;align-items:center;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.ls-anchors__inner::-webkit-scrollbar{display:none}
.ls-anchors__label{flex-shrink:0;font-size:13px;letter-spacing:.16em;color:var(--ls-muted);margin-right:6px}
.ls-anchors a{
  flex-shrink:0;padding:8px 17px;border-radius:999px;border:1px solid var(--ls-line);
  font-size:14px;color:var(--ls-muted);white-space:nowrap;
}
.ls-anchors a:hover{color:var(--ls-primary);border-color:rgba(0,230,168,.55);background:rgba(0,230,168,.08)}

/* ---------- 通用区块头 ---------- */
.ls-section__head{max-width:740px;margin-bottom:48px}
.ls-h2{font-size:clamp(26px,3vw,34px);margin:0 0 14px}
.ls-section__head p{color:var(--ls-muted);font-size:17px;margin:0}
.ls-section__head--center{margin-left:auto;margin-right:auto;text-align:center}
.ls-section__head--center .ls-eyebrow{justify-content:center}

/* ---------- 时间线 ---------- */
.ls-timeline{position:relative;display:flex;flex-direction:column;gap:36px}
.ls-timeline::before{
  content:"";position:absolute;left:50%;top:10px;bottom:10px;width:2px;margin-left:-1px;
  background:linear-gradient(180deg,rgba(0,230,168,0),rgba(0,230,168,.42) 12%,rgba(0,230,168,.42) 88%,rgba(0,230,168,0));
}
.ls-tl-item{position:relative;width:calc(50% - 44px)}
.ls-tl-item:nth-child(odd){align-self:flex-start}
.ls-tl-item:nth-child(even){align-self:flex-end}
.ls-tl-item::after{
  content:"";position:absolute;top:36px;width:12px;height:12px;border-radius:50%;
  background:var(--ls-primary);box-shadow:0 0 0 4px rgba(0,230,168,.16),0 0 14px rgba(0,230,168,.6);
}
.ls-tl-item:nth-child(odd)::after{right:-50px}
.ls-tl-item:nth-child(even)::after{left:-50px}
.ls-tl-card{
  background:var(--ls-surface);border:1px solid var(--ls-line);border-radius:var(--ls-radius);
  overflow:hidden;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.ls-tl-card:hover{transform:translateY(-4px);border-color:rgba(0,230,168,.48);box-shadow:var(--ls-shadow-lg)}
.ls-tl-card__media{height:170px;overflow:hidden;background:var(--ls-surface-2)}
.ls-tl-card__media img{width:100%;height:100%;transition:transform .45s ease}
.ls-tl-card:hover .ls-tl-card__media img{transform:scale(1.05)}
.ls-tl-card__body{padding:22px 24px 26px}
.ls-tl-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px}
.ls-tl-meta time,.ls-tl-meta span.ls-meta-text{font-size:13px;color:var(--ls-muted)}
.ls-tl-card h3{font-size:20px;margin:0 0 10px}
.ls-tl-card p{color:var(--ls-muted);font-size:15.5px;line-height:1.85;margin:0 0 16px}
.ls-link-more{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--ls-primary)}
.ls-link-more::after{content:"→";transition:transform .2s ease}
.ls-link-more:hover::after{transform:translateX(4px)}

/* 标签 */
.ls-tag{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:12.5px;letter-spacing:.04em;border:1px solid transparent;white-space:nowrap}
.ls-tag--primary{color:var(--ls-primary);background:rgba(0,230,168,.1);border-color:rgba(0,230,168,.3)}
.ls-tag--muted{color:var(--ls-muted);background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.09)}
.ls-tag--accent{color:#FFB491;background:rgba(255,107,44,.13);border-color:rgba(255,107,44,.32)}

/* ---------- 数据条 ---------- */
.ls-stats{
  background:var(--ls-surface);border-top:1px solid var(--ls-line);border-bottom:1px solid var(--ls-line);
}
.ls-stats__grid{display:grid;grid-template-columns:repeat(4,1fr)}
.ls-stat{padding:42px 28px;border-right:1px solid rgba(0,230,168,.1)}
.ls-stat:last-child{border-right:0}
.ls-stat strong{
  display:block;font-family:var(--ls-num);font-size:clamp(32px,4vw,46px);line-height:1;
  font-weight:800;color:var(--ls-primary);letter-spacing:-.01em;
}
.ls-stat span{display:block;margin-top:12px;color:var(--ls-muted);font-size:15px;line-height:1.7}

/* ---------- 协同卡片 ---------- */
.ls-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ls-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.ls-card{
  position:relative;background:var(--ls-surface);border:1px solid var(--ls-line);
  border-radius:var(--ls-radius);padding:26px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.ls-card::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:3px;
  background:var(--ls-primary);opacity:.35;transition:opacity .22s ease,box-shadow .22s ease;
}
.ls-card:hover{transform:translateY(-4px);border-color:rgba(0,230,168,.45);box-shadow:var(--ls-shadow-lg)}
.ls-card:hover::before{opacity:1;box-shadow:0 0 14px rgba(0,230,168,.7)}
.ls-card h3{font-size:19px;margin:0 0 10px}
.ls-card p{color:var(--ls-muted);font-size:15.5px;line-height:1.85;margin:0 0 14px}
.ls-card__icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(0,230,168,.1);border:1px solid rgba(0,230,168,.28);color:var(--ls-primary);font-size:18px;
}
.ls-list-check{margin:0 0 18px}
.ls-list-check li{position:relative;padding-left:22px;font-size:15px;color:var(--ls-muted);line-height:1.9}
.ls-list-check li::before{content:"";position:absolute;left:0;top:.78em;width:8px;height:8px;border-radius:2px;background:var(--ls-primary);opacity:.75}

/* ---------- FAQ ---------- */
.ls-faq{display:flex;flex-direction:column;gap:12px;max-width:940px}
.ls-faq__item{
  background:var(--ls-surface);border:1px solid var(--ls-line);border-radius:14px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.ls-faq__item[open]{border-color:rgba(0,230,168,.42);box-shadow:inset 3px 0 0 var(--ls-primary)}
.ls-faq__q{
  display:flex;gap:16px;align-items:flex-start;padding:20px 24px;cursor:pointer;
  font-size:17px;font-weight:700;color:var(--ls-text);transition:color .18s ease;
}
.ls-faq__q:hover{color:var(--ls-primary)}
.ls-faq__item[open] .ls-faq__q{color:var(--ls-primary)}
.ls-faq__num{font-family:var(--ls-num);font-size:15px;color:var(--ls-primary);opacity:.85;flex-shrink:0;line-height:1.9}
.ls-faq__a{padding:0 24px 22px 58px;color:var(--ls-muted);font-size:16px;line-height:1.9}
.ls-faq__a p{margin:0}

/* ---------- CTA ---------- */
.ls-cta{
  position:relative;overflow:hidden;border-radius:22px;
  border:1px solid rgba(0,230,168,.34);
  background:radial-gradient(900px 320px at 12% 0%,rgba(0,230,168,.17),transparent 70%),#121A1E;
  padding:52px;display:grid;grid-template-columns:1.35fr .85fr;gap:34px;align-items:center;
}
.ls-cta::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(0,230,168,.8),transparent);
}
.ls-cta h2{font-size:clamp(24px,2.8vw,32px);margin:0 0 14px}
.ls-cta p{color:var(--ls-muted);margin:0;font-size:16.5px}
.ls-cta__actions{display:flex;flex-direction:column;gap:14px;align-items:stretch}
.ls-cta__mail{font-size:14px;color:var(--ls-muted);text-align:center}

/* ---------- 页脚 ---------- */
.ls-footer{background:var(--ls-deep);border-top:1px solid var(--ls-line);padding:72px 0 28px;margin-top:0}
.ls-footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px}
.ls-footer h4{font-size:15px;letter-spacing:.08em;margin:0 0 18px;color:var(--ls-text)}
.ls-footer p{color:var(--ls-muted);font-size:15px;line-height:1.85;margin:0 0 12px}
.ls-footer__brand p{max-width:350px;margin-top:20px}
.ls-footer__links{display:flex;flex-direction:column;gap:12px}
.ls-footer__links a{color:var(--ls-muted);font-size:15px}
.ls-footer__links a:hover{color:var(--ls-primary)}
.ls-footer__bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;
  margin-top:56px;padding-top:24px;border-top:1px solid var(--ls-line-soft);
  color:var(--ls-muted);font-size:14px;line-height:1.8;
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .ls-menu{display:none}
  .ls-burger{display:block}
  .ls-nav{gap:16px}
  .ls-nav__right{margin-left:auto}
  .ls-footer__grid{grid-template-columns:1fr 1fr;gap:34px}
  .ls-stats__grid{grid-template-columns:1fr 1fr}
  .ls-stat{border-bottom:1px solid rgba(0,230,168,.1)}
  .ls-stat:nth-child(2n){border-right:0}
  .ls-stat:nth-child(3),.ls-stat:nth-child(4){border-bottom:0}
  .ls-grid-3{grid-template-columns:1fr 1fr}
  .ls-cta{grid-template-columns:1fr;padding:40px}
  .ls-cta__actions{flex-direction:row;flex-wrap:wrap;justify-content:flex-start}
}
@media screen and (max-width:900px){
  .ls-timeline::before{left:9px;margin-left:0}
  .ls-tl-item{width:100%;padding-left:38px;align-self:stretch!important}
  .ls-tl-item::after{top:30px}
  .ls-tl-item:nth-child(odd)::after,.ls-tl-item:nth-child(even)::after{left:3px;right:auto}
}
@media screen and (max-width:768px){
  body{font-size:16px}
  .ls-container{padding:0 18px}
  .ls-section{padding:64px 0}
  .ls-section--tight{padding:48px 0}
  .ls-hero{padding:124px 0 56px}
  .ls-hero__points{gap:22px;margin-top:32px}
  .ls-hero__point{min-width:132px}
  .ls-anchors{top:64px}
  .ls-header{height:64px}
  .ls-section__head{margin-bottom:34px}
  .ls-grid-3,.ls-grid-2{grid-template-columns:1fr}
  .ls-faq__a{padding-left:24px}
  .ls-footer__grid{grid-template-columns:1fr}
}
@media screen and (max-width:520px){
  .ls-logo__text{font-size:17px}
  .ls-logo__text small{display:none}
  .ls-hero h1{font-size:28px}
  .ls-hero__lead{font-size:16.5px}
  .ls-hero__actions .ls-btn{width:100%}
  .ls-stats__grid{grid-template-columns:1fr}
  .ls-stat{border-right:0;border-bottom:1px solid rgba(0,230,168,.1);padding:30px 18px}
  .ls-stat:last-child{border-bottom:0}
  .ls-cta{padding:30px 22px}
  .ls-cta__actions .ls-btn{width:100%}
  .ls-tl-card__body{padding:18px 18px 22px}
  .ls-card{padding:22px}
}