/* roulang page: index */
:root{
  --c-bg-0:#050B14;
  --c-bg-1:#0A1526;
  --c-bg-2:#0D1B30;
  --c-surface:rgba(255,255,255,0.06);
  --c-line:rgba(255,255,255,0.10);
  --c-line-strong:rgba(61,245,200,0.35);
  --c-text:#EAF2FF;
  --c-text-2:#A7B8CE;
  --c-text-3:#6C7F97;
  --c-brand:#2E6BFF;
  --c-glow:#3DF5C8;
  --c-accent:#FF8A3D;
  --c-warn:#FFB43A;
  --c-error:#FF6B6B;
  --c-disabled:rgba(255,255,255,0.25);
  --r-card:16px;
  --r-btn:12px;
  --r-input:10px;
  --r-pill:999px;
  --shadow-card:0 8px 32px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.06);
  --shadow-glow:0 0 0 1px rgba(61,245,200,0.5), 0 10px 30px rgba(61,245,200,0.22);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","DIN Alternate","SFMono-Regular",Consolas,Menlo,monospace;
  --space-section:96px;
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(46,107,255,0.16), transparent 60%),
    radial-gradient(900px 500px at 92% 8%, rgba(61,245,200,0.10), transparent 62%),
    var(--c-bg-0);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-text-2);text-decoration:none;border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease;}
a:hover{color:var(--c-glow);border-bottom-color:var(--c-glow);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--c-glow);outline-offset:2px;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.5px;color:var(--c-text);}
h1{font-size:clamp(30px,4.4vw,50px);line-height:1.2;}
h2{font-size:clamp(24px,3vw,31px);line-height:1.3;}
h3{font-size:clamp(18px,2vw,21px);line-height:1.4;letter-spacing:-0.2px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:var(--space-section) 0;position:relative;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section-head p{color:var(--c-text-2);margin-top:12px;max-width:640px;font-size:15px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:1px;color:var(--c-glow);
  padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(61,245,200,0.30);
  background:rgba(61,245,200,0.08);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-glow);box-shadow:0 0 10px var(--c-glow);}

/* 导航 */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:90;
  height:72px;display:flex;align-items:center;
  border-bottom:1px solid var(--c-line);
  background:linear-gradient(180deg,rgba(5,11,20,0.86),rgba(5,11,20,0.42));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{
  background:rgba(8,16,28,0.92);
  box-shadow:0 12px 34px rgba(0,0,0,0.55);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;width:100%;}
.nav-side{display:flex;align-items:center;gap:26px;flex:1;}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;color:var(--c-text-2);padding:6px 2px;
  border-bottom:1px solid transparent;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--c-brand),var(--c-glow));transition:right .22s ease;
}
.nav-link:hover{color:var(--c-brand);border-bottom-color:transparent;}
.nav-link:hover::after{right:0;}
.nav-link.active{color:var(--c-glow);}
.nav-link.active::after{right:0;background:var(--c-glow);box-shadow:0 0 10px rgba(61,245,200,0.6);}
.brand{display:flex;align-items:baseline;gap:8px;border-bottom:none;}
.brand-main{font-size:22px;font-weight:700;color:var(--c-text);letter-spacing:1px;}
.brand-sub{font-size:13px;color:var(--c-glow);letter-spacing:2px;}
.brand:hover .brand-main{color:var(--c-glow);}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 20px;border-radius:var(--r-btn);font-size:14px;font-weight:600;
  color:#04121A;background:var(--c-glow);box-shadow:var(--shadow-glow);
  border-bottom:none;transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
}
.nav-cta:hover{color:#04121A;background:#4ffcd4;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(61,245,200,0.6),0 14px 34px rgba(61,245,200,0.28);border-bottom-color:transparent;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:var(--c-surface);border:1px solid var(--c-line);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-text);position:relative;transition:background .2s ease;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-text);transition:transform .2s ease;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}
.mobile-panel{
  position:fixed;top:72px;left:0;right:0;z-index:89;
  background:rgba(8,16,28,0.98);
  border-bottom:1px solid var(--c-line);
  transform:translateY(-120%);transition:transform .2s ease;
  padding:8px 24px 24px;
}
.mobile-panel.is-open{transform:translateY(0);}
.mobile-panel a{
  display:block;height:48px;line-height:48px;font-size:16px;
  border-bottom:1px solid var(--c-line);color:var(--c-text-2);
}
.mobile-panel a:hover{color:var(--c-glow);}
.mobile-panel .nav-cta{margin-top:18px;height:46px;line-height:1;display:flex;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;border-bottom:none;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{color:#04121A;background:var(--c-glow);box-shadow:var(--shadow-glow);}
.btn-primary:hover{color:#04121A;background:#4ffcd4;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(61,245,200,0.6),0 16px 38px rgba(61,245,200,0.3);}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(61,245,200,0.45),0 6px 18px rgba(61,245,200,0.18);}
.btn-ghost{color:var(--c-text);background:transparent;border:1px solid var(--c-line);}
.btn-ghost:hover{color:var(--c-glow);border-color:var(--c-line-strong);background:rgba(61,245,200,0.06);}
.btn[disabled],.btn.is-disabled{background:rgba(255,255,255,0.10);color:var(--c-disabled);box-shadow:none;border:1px solid var(--c-line);cursor:not-allowed;transform:none;}
.btn-block{width:100%;}

/* Hero */
.hero{
  position:relative;padding:150px 0 96px;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(5,11,20,0.90) 0%,rgba(5,11,20,0.72) 42%,rgba(5,11,20,0.97) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    repeating-linear-gradient(115deg,rgba(255,255,255,0.05) 0 1px,transparent 1px 46px);
  opacity:0.5;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,0.92fr);gap:56px;align-items:center;}
.hero-copy h1{margin:20px 0 18px;}
.hero-copy h1 .hl{color:var(--c-glow);}
.hero-lead{font-size:17px;color:var(--c-text-2);max-width:560px;line-height:1.8;}
.hero-actions{display:flex;gap:14px;margin:32px 0 36px;flex-wrap:wrap;}
.hero-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;border-top:1px solid var(--c-line);padding-top:26px;}
.hero-stats .num{font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--c-glow);letter-spacing:-0.5px;}
.hero-stats .num small{font-size:14px;color:var(--c-text-2);margin-left:4px;font-family:var(--font-sans);font-weight:400;}
.hero-stats .label{font-size:13px;color:var(--c-text-3);margin-top:4px;}
.glass{
  background:linear-gradient(160deg,rgba(255,255,255,0.10),rgba(255,255,255,0.04));
  border:1px solid var(--c-line);border-radius:var(--r-card);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-card);
}
.hero-card{padding:30px;transform:translateY(24px);}
.hero-card h3{font-size:19px;margin-bottom:6px;}
.hero-card .sub{font-size:13px;color:var(--c-text-3);margin-bottom:20px;}
.hero-card ul li{display:flex;gap:14px;padding:14px 0;border-top:1px solid var(--c-line);}
.hero-card ul li:first-child{border-top:none;}
.hero-card .k{font-family:var(--font-mono);font-size:13px;color:var(--c-glow);min-width:52px;}
.hero-card .v{font-size:14px;color:var(--c-text-2);}
.hero-card .v strong{display:block;color:var(--c-text);font-size:15px;font-weight:600;margin-bottom:2px;}

/* 三步 */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;position:relative;}
.steps::before{
  content:"";position:absolute;top:56px;left:8%;right:8%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(61,245,200,0.45),rgba(46,107,255,0.35),transparent);
}
.step-card{
  position:relative;padding:28px;border-radius:var(--r-card);
  background:var(--c-bg-1);border:1px solid var(--c-line);box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease;
}
.step-card:hover{transform:translateY(-4px);border-color:var(--c-line-strong);}
.step-no{
  font-family:var(--font-mono);font-size:30px;font-weight:700;
  color:var(--c-glow);letter-spacing:-1px;margin-bottom:14px;display:block;
  text-shadow:0 0 22px rgba(61,245,200,0.35);
}
.step-card h3{margin-bottom:10px;}
.step-card p{font-size:14.5px;color:var(--c-text-2);}
.step-card .micro{display:inline-block;margin-top:16px;font-size:13px;color:var(--c-glow);border-bottom:1px solid rgba(61,245,200,0.4);}

/* 案例 */
.case-grid{display:grid;grid-template-columns:1.35fr 1fr;grid-template-rows:auto auto;gap:24px;}
.case-card{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  background:linear-gradient(160deg,rgba(255,255,255,0.09),rgba(255,255,255,0.03));
  border:1px solid var(--c-line);box-shadow:var(--shadow-card);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  display:flex;flex-direction:column;
  transition:transform .2s ease,border-color .2s ease;
}
.case-card:hover{transform:translateY(-4px);border-color:var(--c-line-strong);}
.case-card.big{grid-row:span 2;}
.case-media{overflow:hidden;border-radius:var(--r-card) var(--r-card) 0 0;background:#0B1626;}
.case-card.big .case-media{aspect-ratio:4/3;}
.case-card:not(.big) .case-media{aspect-ratio:16/9;}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.case-card:hover .case-media img{transform:scale(1.03);}
.case-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.case-body h3{font-size:19px;}
.case-body p{font-size:14px;color:var(--c-text-2);}
.case-result{font-family:var(--font-mono);font-size:24px;font-weight:700;color:var(--c-glow);margin-top:auto;}
.case-result small{display:block;font-family:var(--font-sans);font-size:12.5px;font-weight:400;color:var(--c-text-3);margin-top:4px;}
.tag{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;color:var(--c-accent);border:1px solid rgba(255,138,61,0.35);
  background:rgba(255,138,61,0.10);width:fit-content;
}
.badge{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;color:var(--c-text-2);border:1px solid var(--c-line);background:rgba(255,255,255,0.05);
}
.badge-glow{color:var(--c-glow);border-color:rgba(61,245,200,0.30);background:rgba(61,245,200,0.08);}

/* 资讯列表 */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.news-card{
  display:flex;flex-direction:column;gap:14px;padding:26px;
  border-radius:var(--r-card);background:var(--c-bg-1);
  border:1px solid var(--c-line);box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:var(--c-line-strong);}
.news-card h3{font-size:18px;line-height:1.45;}
.news-card h3 a{color:var(--c-text);border-bottom:none;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card:hover h3 a{color:var(--c-glow);}
.news-desc{
  font-size:14px;color:var(--c-text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);font-size:12.5px;color:var(--c-text-3);}
.news-meta .arrow{color:var(--c-text-3);transition:transform .2s ease,color .2s ease;}
.news-card:hover .news-meta .arrow{transform:translateX(4px);color:var(--c-glow);}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 24px;border-radius:var(--r-card);
  background:var(--c-bg-1);border:1px dashed var(--c-line);
}
.empty-state .ico{font-size:30px;color:var(--c-text-3);margin-bottom:12px;}
.empty-state p{color:var(--c-text-2);margin-bottom:16px;}

/* FAQ */
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:48px;align-items:start;}
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:60px;padding:16px 4px;background:none;border:0;cursor:pointer;
  text-align:left;font-size:16px;font-weight:600;color:var(--c-text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-glow);}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--c-line);color:var(--c-text-2);
  display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;
  transition:transform .22s ease,color .22s ease,border-color .22s ease,background .22s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:#04121A;background:var(--c-glow);border-color:var(--c-glow);}
.faq-item.is-open .faq-q{color:var(--c-glow);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
.faq-a-inner{padding:2px 4px 22px;font-size:15px;line-height:1.85;color:var(--c-text-2);}
.faq-a-inner ul li{position:relative;padding-left:16px;margin-top:6px;}
.faq-a-inner ul li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--c-brand);}

/* CTA 表单 */
.cta-panel{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  background:linear-gradient(150deg,rgba(255,255,255,0.10),rgba(255,255,255,0.035));
  border:1px solid var(--c-line);box-shadow:var(--shadow-card);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,0.9fr);gap:48px;
  padding:44px;
}
.cta-panel::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(61,245,200,0.85),transparent);}
.cta-copy h2{margin-bottom:16px;}
.cta-copy p{color:var(--c-text-2);font-size:15px;margin-bottom:20px;}
.cta-points li{display:flex;gap:10px;font-size:14.5px;color:var(--c-text-2);padding:6px 0;}
.cta-points li span{color:var(--c-glow);}
.form-row{margin-bottom:16px;}
.form-row label{display:block;font-size:13.5px;color:var(--c-text-2);margin-bottom:8px;}
.form-row input,.form-row select{
  width:100%;height:46px;padding:0 14px;border-radius:var(--r-input);
  background:rgba(255,255,255,0.04);border:1px solid var(--c-line);
  color:var(--c-text);font-size:15px;font-family:inherit;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.form-row input::placeholder{color:var(--c-text-3);}
.form-row input:focus,.form-row select:focus{
  outline:none;border-color:var(--c-glow);box-shadow:0 0 0 3px rgba(61,245,200,0.18);
}
.form-row.has-error input,.form-row.has-error select{border-color:var(--c-error);}
.form-error{display:none;font-size:12.5px;color:var(--c-error);margin-top:6px;}
.form-row.has-error .form-error{display:block;}
.form-note{font-size:12.5px;color:var(--c-text-3);margin-top:14px;line-height:1.7;}
.form-ok{display:none;margin-top:14px;font-size:13.5px;color:var(--c-glow);}
.form-ok.is-visible{display:block;}

/* 覆盖区域条 */
.coverage{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:40px;}
.coverage-item{
  padding:20px 22px;border-radius:14px;background:var(--c-bg-1);
  border:1px solid var(--c-line);
}
.coverage-item strong{display:block;font-family:var(--font-mono);font-size:15px;color:var(--c-glow);margin-bottom:6px;}
.coverage-item span{font-size:13.5px;color:var(--c-text-3);}

/* 页脚 */
.site-footer{border-top:1px solid var(--c-line);background:rgba(6,12,22,0.92);padding:64px 0 0;margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer-brand .brand-main{font-size:20px;}
.footer-brand p{font-size:14px;color:var(--c-text-3);margin-top:14px;max-width:320px;line-height:1.8;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--c-text);}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--c-text-2);}
.footer-col a:hover{color:var(--c-glow);}
.footer-contact li{font-size:14px;color:var(--c-text-2);margin-bottom:10px;}
.footer-contact .mono{color:var(--c-text);}
.footer-bottom{
  border-top:1px solid var(--c-line);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-3);
}
.footer-bottom .lang{display:inline-flex;align-items:center;gap:8px;}
.footer-bottom .lang span{padding:4px 10px;border-radius:var(--r-pill);border:1px solid var(--c-line);color:var(--c-text-2);}

/* 骨架屏 */
.skeleton{background:linear-gradient(90deg,rgba(255,255,255,0.05) 25%,rgba(255,255,255,0.10) 37%,rgba(255,255,255,0.05) 63%);background-size:400% 100%;animation:breathe 1.4s ease infinite;}
@keyframes breathe{0%{background-position:100% 50%;}100%{background-position:0 50%;}}

/* 响应式 */
@media (max-width:1279px){
  .container{max-width:1040px;}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .coverage{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:1023px){
  :root{--space-section:64px;}
  .nav-side.left,.nav-side.right .nav-link{display:none;}
  .nav-toggle{display:flex;}
  .nav-cta.desktop-only{display:none;}
  .hero{padding:130px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-card{transform:none;}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
  .steps{grid-template-columns:1fr;gap:20px;}
  .steps::before{left:34px;right:auto;top:20px;bottom:20px;width:1px;height:auto;background:linear-gradient(180deg,transparent,rgba(61,245,200,0.45),transparent);}
  .step-card{padding-left:78px;}
  .step-no{position:absolute;left:26px;top:26px;font-size:22px;margin:0;}
  .case-grid{grid-template-columns:1fr;}
  .case-card.big{grid-row:auto;}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .cta-panel{grid-template-columns:1fr;gap:32px;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  :root{--space-section:48px;}
  .container{padding:0 16px;}
  body{font-size:16px;}
  .hero{min-height:420px;padding:116px 0 56px;}
  .hero-lead{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .hero-stats{grid-template-columns:1fr 1fr;gap:18px;}
  .hero-stats .num{font-size:22px;}
  .news-grid{grid-template-columns:1fr;}
  .case-body{padding:20px;}
  .cta-panel{padding:24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .section-head{margin-bottom:28px;}
}
@media (max-width:519px){
  .hero-stats{grid-template-columns:1fr;}
  .coverage{grid-template-columns:1fr;}
  .step-card{padding:24px 22px 24px 66px;}
  .step-no{left:20px;top:22px;}
}

/* roulang page: article */
:root{
  --c-bg-0:#050B14;
  --c-bg-1:#0A1526;
  --c-bg-2:#0D1B30;
  --c-surface:rgba(255,255,255,.06);
  --c-line:rgba(255,255,255,.10);
  --c-line-strong:rgba(255,255,255,.18);
  --c-line-glow:rgba(61,245,200,.35);
  --c-brand:#2E6BFF;
  --c-glow:#3DF5C8;
  --c-accent:#FF8A3D;
  --c-text:#EAF2FF;
  --c-text-2:#A7B8CE;
  --c-text-3:#6C7F97;
  --c-ok:#3DF5C8;
  --c-warn:#FFB43A;
  --c-error:#FF6B6B;
  --r-card:16px;
  --r-btn:12px;
  --r-input:10px;
  --r-badge:999px;
  --shadow-card:0 8px 32px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-soft:0 18px 48px rgba(0,0,0,.5);
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",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(--c-bg-0);
  color:var(--c-text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(46,107,255,.16), transparent 62%),
    radial-gradient(700px 420px at 92% 4%, rgba(61,245,200,.09), transparent 60%);
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--c-text-2);text-decoration:none;transition:color .2s ease,border-color .2s ease;}
a:hover{color:var(--c-glow);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.4px;line-height:1.28;color:var(--c-text);}
p{margin:0;}
::selection{background:rgba(61,245,200,.28);color:#04121A;}
:focus-visible{outline:2px solid var(--c-glow);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:72px;display:flex;align-items:center;
  border-bottom:1px solid var(--c-line);
  background:rgba(5,11,20,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(7,14,26,.9);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
  border-color:rgba(255,255,255,.14);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:72px;
  gap:16px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-side.left{justify-content:flex-start;}
.nav-side.right{justify-content:flex-end;gap:22px;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--c-text-2);
  padding:6px 2px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--c-glow),rgba(61,245,200,0));
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-brand);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--c-glow);}
.nav-link.active::after{transform:scaleX(1);}
.brand{display:inline-flex;align-items:baseline;gap:6px;justify-self:center;}
.brand-main{font-size:21px;font-weight:700;color:var(--c-text);letter-spacing:1px;}
.brand-sub{font-size:12px;letter-spacing:3px;color:var(--c-glow);}
.brand:hover .brand-main{color:var(--c-glow);}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 20px;border-radius:var(--r-btn);
  background:var(--c-glow);color:#04121A;font-size:14px;font-weight:700;
  box-shadow:0 0 0 1px rgba(61,245,200,.5),0 10px 30px rgba(61,245,200,.22);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.nav-cta:hover{color:#04121A;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(61,245,200,.6),0 14px 38px rgba(61,245,200,.3);}
.nav-cta:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(61,245,200,.5),0 6px 18px rgba(61,245,200,.2);}
.nav-toggle{
  display:none;
  width:44px;height:40px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:rgba(255,255,255,.04);
  align-items:center;justify-content:center;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--c-text);border-radius:2px;transition:background .2s ease;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-text);border-radius:2px;transition:transform .2s ease;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg);}
.mobile-panel{
  display:none;
  position:fixed;top:72px;left:0;right:0;z-index:55;
  background:rgba(8,16,30,.98);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--c-line);
  padding:8px 24px 22px;
  transform:translateY(-12px);
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;
}
.mobile-panel.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.mobile-panel a{
  display:block;line-height:48px;font-size:15px;color:var(--c-text-2);
  border-bottom:1px solid var(--c-line);
}
.mobile-panel a:hover,.mobile-panel a.active{color:var(--c-glow);}
.mobile-panel .mobile-cta{
  margin-top:18px;line-height:44px;text-align:center;border-radius:var(--r-btn);
  background:var(--c-glow);color:#04121A;font-weight:700;border-bottom:none;
}

/* ---------- article layout ---------- */
main{position:relative;z-index:1;padding-top:72px;}
.crumb-bar{border-bottom:1px solid var(--c-line);background:rgba(10,21,38,.6);}
.crumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:18px 0;font-size:13px;color:var(--c-text-3);
}
.crumb a{color:var(--c-text-3);}
.crumb a:hover{color:var(--c-glow);}
.crumb .sep{color:rgba(255,255,255,.22);}
.crumb .current{color:var(--c-text-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-shell{
  display:grid;
  grid-template-columns:minmax(0,760px) 300px;
  gap:48px;
  padding:56px 0 96px;
  align-items:start;
}
.article-main{min-width:0;}
.post-head{padding-bottom:28px;border-bottom:1px solid var(--c-line);margin-bottom:36px;}
.post-tagline{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-badge);
  font-size:12px;letter-spacing:.4px;
  background:rgba(46,107,255,.14);color:#9EC0FF;border:1px solid rgba(46,107,255,.35);
}
.tag.is-accent{background:rgba(255,138,61,.12);color:#FFC79C;border-color:rgba(255,138,61,.35);}
.tag.is-glow{background:rgba(61,245,200,.12);color:var(--c-glow);border-color:var(--c-line-glow);}
.post-head h1{font-size:40px;line-height:1.3;letter-spacing:-.6px;margin-bottom:18px;}
.post-meta{display:flex;align-items:center;gap:22px;flex-wrap:wrap;font-size:13px;color:var(--c-text-3);}
.post-meta span{display:inline-flex;align-items:center;gap:6px;}
.post-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.2);}

/* ---------- article body ---------- */
.article-body{
  max-width:760px;
  font-size:17.5px;
  line-height:1.85;
  color:#D5E2F2;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.6em;}
.article-body h2{
  position:relative;
  font-size:28px;
  margin:2em 0 .7em;
  padding-left:16px;
  line-height:1.35;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;
  background:var(--c-glow);box-shadow:0 0 14px rgba(61,245,200,.55);
}
.article-body h3{font-size:21px;margin:1.7em 0 .6em;color:var(--c-text);}
.article-body h4{font-size:17px;margin:1.4em 0 .5em;color:var(--c-text-2);letter-spacing:0;}
.article-body strong{color:var(--c-text);font-weight:700;}
.article-body em{color:var(--c-text-2);font-style:normal;}
.article-body ul,.article-body ol{margin:0 0 1.6em;padding-left:1.35em;}
.article-body ul{list-style:none;}
.article-body ul li{position:relative;padding-left:14px;margin-bottom:.6em;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
  background:var(--c-glow);box-shadow:0 0 8px rgba(61,245,200,.6);
}
.article-body ol{list-style:decimal;color:var(--c-text-2);}
.article-body ol li{margin-bottom:.6em;padding-left:4px;}
.article-body ol li::marker{color:var(--c-glow);font-family:var(--mono);}
.article-body blockquote{
  margin:1.8em 0;padding:20px 24px;
  background:var(--c-bg-1);
  border-left:3px solid var(--c-brand);
  border-radius:0 var(--r-card) var(--r-card) 0;
  color:var(--c-text-2);
  font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body figure{margin:2em 0;}
.article-body img{border-radius:12px;border:1px solid var(--c-line);width:100%;height:auto;}
.article-body figcaption{font-size:13px;color:var(--c-text-3);text-align:center;margin-top:10px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.8em 0;font-size:15px;
  border:1px solid var(--c-line);border-radius:12px;overflow:hidden;
}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--c-line);}
.article-body th{background:rgba(255,255,255,.05);color:var(--c-text);font-weight:700;font-size:14px;}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.03);}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body code{
  font-family:var(--mono);font-size:14px;padding:2px 7px;border-radius:6px;
  background:rgba(46,107,255,.14);color:#A9C6FF;
}
.article-body pre{
  margin:1.8em 0;padding:20px 22px;border-radius:14px;
  background:#050B14;border:1px solid var(--c-line);
  overflow-x:auto;font-size:14px;line-height:1.7;
}
.article-body pre code{background:none;padding:0;color:#BFD3EA;}
.article-body hr{border:none;border-top:1px solid var(--c-line);margin:2.4em 0;}

/* ---------- empty / error / skeleton ---------- */
.state-box{
  max-width:760px;padding:38px 32px;border-radius:var(--r-card);
  background:var(--c-bg-1);border:1px solid var(--c-line);box-shadow:var(--shadow-card);
  text-align:center;
}
.state-icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:24px? ;
}
.state-icon{border:1px solid var(--c-line-glow);background:rgba(61,245,200,.08);color:var(--c-glow);font-size:22px;line-height:1;font-weight:700;}
.state-box h2{font-size:22px;margin-bottom:12px;}
.state-box p{color:var(--c-text-2);margin-bottom:22px;}
.state-box.is-error{border-color:rgba(255,107,107,.4);}
.state-box.is-error .state-icon{border-color:rgba(255,107,107,.4);background:rgba(255,107,107,.08);color:var(--c-error);}
.skeleton{border-radius:12px;background:linear-gradient(90deg,rgba(255,255,255,.05),rgba(255,255,255,.12),rgba(255,255,255,.05));background-size:200% 100%;animation:sk 1.4s ease-in-out infinite;}
@keyframes sk{0%{background-position:200% 0;}100%{background-position:-200% 0;}}

/* ---------- 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:700;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease,filter .2s ease;
}
.btn-primary{
  background:var(--c-glow);color:#04121A;
  box-shadow:0 0 0 1px rgba(61,245,200,.5),0 10px 30px rgba(61,245,200,.22);
}
.btn-primary:hover{color:#04121A;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(61,245,200,.6),0 16px 40px rgba(61,245,200,.3);}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(61,245,200,.5),0 6px 16px rgba(61,245,200,.2);}
.btn-ghost{background:transparent;color:var(--c-text);border-color:var(--c-line-strong);}
.btn-ghost:hover{color:var(--c-glow);border-color:var(--c-line-glow);background:rgba(61,245,200,.06);}
.btn[disabled],.btn.is-disabled{
  background:rgba(255,255,255,.12);color:rgba(255,255,255,.35);
  border-color:transparent;box-shadow:none;filter:saturate(.3);cursor:not-allowed;transform:none;
}

/* ---------- footer of post ---------- */
.post-foot{
  max-width:760px;margin-top:44px;padding-top:28px;border-top:1px solid var(--c-line);
}
.post-foot h2{font-size:15px;letter-spacing:.5px;color:var(--c-text-3);font-weight:600;margin-bottom:14px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.post-nav{display:flex;gap:14px;flex-wrap:wrap;}
.post-nav a{
  display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-btn);
  border:1px solid var(--c-line);background:var(--c-bg-1);color:var(--c-text-2);font-size:14px;
}
.post-nav a:hover{color:var(--c-glow);border-color:var(--c-line-glow);transform:translateY(-1px);}

/* ---------- aside ---------- */
.post-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.aside-card{
  border-radius:var(--r-card);border:1px solid var(--c-line);
  background:var(--c-bg-1);box-shadow:var(--shadow-card);padding:24px;
}
.aside-card h3{font-size:16px;margin-bottom:14px;}
.aside-card p{font-size:13.5px;color:var(--c-text-3);line-height:1.8;}
.aside-list li{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 0;border-bottom:1px solid var(--c-line);font-size:14px;}
.aside-list li:last-child{border-bottom:none;padding-bottom:0;}
.aside-list a{color:var(--c-text-2);}
.aside-list a:hover{color:var(--c-glow);}
.aside-list .num{font-family:var(--mono);color:var(--c-glow);font-size:13px;}

/* ---------- related ---------- */
.section{padding:96px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;flex-wrap:wrap;}
.section-head h2{font-size:30px;}
.section-head p{color:var(--c-text-3);font-size:14px;margin-top:10px;}
.eyebrow{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;margin-bottom:14px;
  border-radius:var(--r-badge);font-size:12px;letter-spacing:1px;
  background:rgba(61,245,200,.1);color:var(--c-glow);border:1px solid var(--c-line-glow);
}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;flex-direction:column;height:100%;
  border-radius:var(--r-card);border:1px solid var(--c-line);
  background:var(--c-bg-1);box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--c-line-glow);box-shadow:var(--shadow-soft);}
.rel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#071021;}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,11,20,.1),rgba(5,11,20,.72));}
.rel-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.rel-body h3{font-size:17px;line-height:1.5;}
.rel-body p{font-size:14px;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--c-text-3);font-family:var(--mono);}
.rel-card:hover .rel-foot .arrow{transform:translateX(4px);color:var(--c-glow);}
.rel-foot .arrow{transition:transform .2s ease,color .2s ease;}

/* ---------- cta ---------- */
.cta-wrap{padding:0 0 96px;}
.cta-panel{
  position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
  padding:48px;border-radius:24px;
  background:linear-gradient(140deg,rgba(255,255,255,.09),rgba(255,255,255,.03));
  border:1px solid var(--c-line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-soft);
  overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(61,245,200,0),var(--c-glow),rgba(61,245,200,0));
}
.cta-copy h2{font-size:32px;margin-bottom:14px;}
.cta-copy p{color:var(--c-text-2);font-size:15.5px;max-width:44ch;}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--c-text-2);}
.cta-points li{display:flex;align-items:center;gap:10px;}
.cta-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-glow);box-shadow:0 0 8px rgba(61,245,200,.6);}
.form-field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;}
.form-field label{font-size:13px;color:var(--c-text-2);letter-spacing:.3px;}
.form-field input,.form-field select{
  height:46px;padding:0 14px;border-radius:var(--r-input);
  background:rgba(255,255,255,.04);border:1px solid var(--c-line);color:var(--c-text);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.form-field input::placeholder{color:rgba(255,255,255,.28);}
.form-field input:focus,.form-field select:focus{
  outline:none;border-color:var(--c-glow);background:rgba(61,245,200,.05);
  box-shadow:0 0 0 3px rgba(61,245,200,.16);
}
.form-field select option{background:#0A1526;color:var(--c-text);}
.form-field.has-error input,.form-field.has-error select{border-color:var(--c-error);}
.form-hint{font-size:12.5px;color:var(--c-text-3);margin-top:12px;}
.form-error{font-size:12.5px;color:var(--c-error);display:none;}
.form-field.has-error .form-error{display:block;}
.form-note{font-size:12.5px;color:var(--c-glow);margin-top:14px;min-height:18px;}
.apply-form .btn{width:100%;}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--c-line);
  background:linear-gradient(180deg,rgba(10,21,38,.6),rgba(5,11,20,.95));
  padding:64px 0 28px;
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .brand{justify-self:flex-start;margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--c-text-3);max-width:34ch;line-height:1.85;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--c-text);}
.footer-col ul li{margin-bottom:12px;font-size:14px;color:var(--c-text-3);}
.footer-col ul li a{color:var(--c-text-2);}
.footer-col ul li a:hover{color:var(--c-glow);}
.footer-contact .mono{color:var(--c-text-2);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-3);
}
.footer-bottom .lang span{color:var(--c-text-2);}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{max-width:1040px;}
  .article-shell{grid-template-columns:minmax(0,1fr) 280px;gap:36px;}
  .nav-side{gap:20px;}
  .nav-side.right{gap:18px;}
}
@media (max-width:1023px){
  .nav-wrap{display:flex;justify-content:space-between;align-items:center;}
  .nav-side.left{display:none;}
  .nav-side.right .nav-link,.nav-side.right .nav-cta.desktop-only{display:none;}
  .nav-toggle{display:flex;}
  .mobile-panel{display:block;}
  .brand{justify-self:flex-start;}
  .article-shell{grid-template-columns:minmax(0,1fr);gap:0;}
  .post-aside{display:none;}
  .post-head h1{font-size:34px;}
  .article-body{font-size:17px;}
  .section{padding:64px 0;}
  .cta-wrap{padding-bottom:64px;}
  .cta-panel{grid-template-columns:1fr;gap:32px;padding:36px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  main{padding-top:72px;}
  .crumb{padding:14px 0;font-size:12.5px;}
  .crumb .current{max-width:100%;white-space:normal;}
  .post-head h1{font-size:28px;letter-spacing:-.3px;}
  .post-meta{gap:14px;}
  .article-body{font-size:16px;line-height:1.8;}
  .article-body h2{font-size:22px;}
  .article-body h3{font-size:19px;}
  .section{padding:48px 0;}
  .card-grid{grid-template-columns:1fr;}
  .cta-panel{padding:26px 20px;border-radius:18px;}
  .cta-copy h2{font-size:24px;}
  .btn{width:100%;}
  .post-nav a{width:100%;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .post-head h1{font-size:25px;}
  .aside-card{padding:20px;}
  .state-box{padding:28px 20px;}
}

/* roulang page: category1 */
:root{
  --c-bg-0:#050B14;
  --c-bg-1:#0A1526;
  --c-surface:rgba(255,255,255,.06);
  --c-line:rgba(255,255,255,.10);
  --c-line-strong:rgba(61,245,200,.35);
  --c-text:#EAF2FF;
  --c-text-2:#A7B8CE;
  --c-text-3:#6C7F97;
  --c-brand:#2E6BFF;
  --c-glow:#3DF5C8;
  --c-accent:#FF8A3D;
  --c-ok:#3DF5C8;
  --c-warn:#FFB43A;
  --c-err:#FF6B6B;
  --c-disabled:rgba(255,255,255,.25);
  --r-card:16px;
  --r-btn:12px;
  --r-input:10px;
  --shadow-card:0 8px 32px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-btn:0 0 0 1px rgba(61,245,200,.5), 0 10px 30px rgba(61,245,200,.22);
  --shadow-btn-hover:0 0 0 1px rgba(61,245,200,.6), 0 14px 40px rgba(61,245,200,.3);
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --sec-pad:96px;
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg-0);
  color:var(--c-text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.2px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-text-2);text-decoration:none;transition:color .2s ease, border-color .2s ease;}
a:hover{color:var(--c-glow);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{font-weight:700;letter-spacing:-.5px;line-height:1.3;}
:focus-visible{outline:2px solid var(--c-glow);outline-offset:3px;border-radius:6px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

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

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  height:72px;
  border-bottom:1px solid var(--c-line);
  background:rgba(5,11,20,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.site-header.scrolled{
  background:rgba(5,11,20,.86);
  box-shadow:0 12px 40px rgba(0,0,0,.5);
  border-color:rgba(255,255,255,.14);
}
.nav-wrap{
  height:72px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
}
.nav-side{display:flex;align-items:center;gap:22px;}
.nav-side.left{justify-content:flex-start;}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--c-text-2);
  padding:6px 2px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--c-glow);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-brand);}
.nav-link:hover::after{transform:scaleX(1);background:var(--c-brand);}
.nav-link.active{color:var(--c-glow);}
.nav-link.active::after{transform:scaleX(1);}
.brand{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:4px 10px;
  border-radius:12px;
  color:var(--c-text);
}
.brand-main{font-size:21px;font-weight:700;letter-spacing:-.5px;}
.brand-sub{
  font-size:12px;
  font-weight:500;
  color:var(--c-glow);
  letter-spacing:2px;
  padding:2px 6px;
  border:1px solid var(--c-line-strong);
  border-radius:999px;
}
.brand:hover{color:var(--c-text);}
.nav-cta{
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 18px;
  border-radius:var(--r-btn);
  background:var(--c-glow);
  color:#04121A;
  font-size:14px;
  font-weight:700;
  box-shadow:var(--shadow-btn);
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.nav-cta:hover{
  color:#04121A;
  background:#57f7d2;
  transform:translateY(-1px);
  box-shadow:var(--shadow-btn-hover);
}
.nav-cta:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(61,245,200,.4), 0 6px 18px rgba(61,245,200,.2);}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--c-line);
  align-items:center;
  justify-content:center;
}
.nav-toggle span{
  position:relative;
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--c-text);
  transition:background .2s ease;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;left:0;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--c-text);
  transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.menu-open .nav-toggle span{background:transparent;}
.menu-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg);}
.menu-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg);}
.desktop-only{display:inline-flex;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:50px;
  padding:0 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:700;
  letter-spacing:.5px;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
}
.btn-primary{
  background:var(--c-glow);
  color:#04121A;
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover{
  color:#04121A;
  background:#57f7d2;
  transform:translateY(-1px);
  box-shadow:var(--shadow-btn-hover);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:0 0 0 1px rgba(61,245,200,.4), 0 6px 18px rgba(61,245,200,.2);
}
.btn-ghost{
  background:transparent;
  color:var(--c-text);
  border:1px solid var(--c-line);
}
.btn-ghost:hover{
  color:var(--c-glow);
  border-color:var(--c-line-strong);
  background:rgba(61,245,200,.06);
  transform:translateY(-1px);
}
.btn[disabled],.btn.is-disabled{
  filter:saturate(.3);
  box-shadow:none;
  cursor:not-allowed;
  opacity:.7;
}

/* ============ 标签 / 徽章 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid var(--c-line);
  background:rgba(46,107,255,.12);
  color:var(--c-text-2);
  font-size:13px;
}
.badge .dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--c-glow);
  box-shadow:0 0 10px rgba(61,245,200,.9);
}
.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  color:var(--c-text-2);
  background:rgba(255,255,255,.05);
  border:1px solid var(--c-line);
}
.tag.accent{color:var(--c-accent);border-color:rgba(255,138,61,.35);background:rgba(255,138,61,.1);}
.tag.brand{color:#9DBBFF;border-color:rgba(46,107,255,.4);background:rgba(46,107,255,.14);}

/* ============ 区块 ============ */
.section{padding:var(--sec-pad) 0;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head .eyebrow{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:3px;
  color:var(--c-glow);
  margin-bottom:14px;
}
.section-head h2{font-size:30px;margin-bottom:14px;}
.section-head p{color:var(--c-text-2);font-size:16px;}

/* ============ 小 Hero ============ */
.page-hero{
  position:relative;
  margin-top:72px;
  padding:104px 0 72px;
  background:linear-gradient(180deg, rgba(5,11,20,.72) 0%, rgba(5,11,20,.9) 60%, var(--c-bg-0) 100%),
             url("/assets/images/backpic/back-1.png") center/cover no-repeat;
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  left:50%;bottom:-260px;
  width:900px;height:520px;
  transform:translateX(-50%);
  border-radius:50%;
  border:1px solid rgba(61,245,200,.08);
  background:radial-gradient(circle at 50% 50%, rgba(46,107,255,.10), transparent 68%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.page-hero h1{
  font-size:46px;
  max-width:880px;
  margin:20px 0 18px;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--c-glow);
}
.page-hero .lead{
  max-width:760px;
  color:var(--c-text-2);
  font-size:17px;
  margin-bottom:12px;
}
.page-hero .lead + .lead{margin-bottom:0;}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}
.hero-meta .meta-cell{
  display:flex;
  align-items:baseline;
  gap:8px;
  padding:10px 16px;
  border-radius:12px;
  background:var(--c-bg-1);
  border:1px solid var(--c-line);
}
.hero-meta .meta-cell strong{
  font-family:var(--mono);
  font-size:18px;
  color:var(--c-glow);
  font-weight:700;
}
.hero-meta .meta-cell span{font-size:13px;color:var(--c-text-3);}

/* 导览条 */
.subnav{
  margin-top:36px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  padding:12px;
  border-radius:999px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  width:fit-content;
  max-width:100%;
}
.subnav a{
  padding:8px 18px;
  border-radius:999px;
  font-size:14px;
  color:var(--c-text-2);
  border:1px solid transparent;
  transition:all .2s ease;
}
.subnav a:hover{
  color:var(--c-glow);
  background:rgba(61,245,200,.08);
  border-color:var(--c-line-strong);
}

/* ============ 图文交替行 ============ */
.zigzag{display:flex;flex-direction:column;gap:26px;}
.zig-row{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:36px;
  align-items:center;
  padding:28px;
  border-radius:var(--r-card);
  background:var(--c-bg-1);
  border:1px solid var(--c-line);
  box-shadow:var(--shadow-card);
  transition:border-color .22s ease, transform .22s ease;
}
.zig-row:hover{border-color:rgba(61,245,200,.28);transform:translateY(-3px);}
.zig-row.reverse .zig-media{order:2;}
.zig-row.reverse .zig-body{order:1;}
.zig-media{
  position:relative;
  border-radius:14px;
  overflow:hidden;
  aspect-ratio:16/10;
  background:#081020;
}
.zig-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s ease;
}
.zig-row:hover .zig-media img{transform:scale(1.03);}
.zig-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(5,11,20,0) 40%, rgba(5,11,20,.55) 100%);
}
.zig-body{padding:6px 4px;}
.zig-body h3{font-size:22px;margin:14px 0 12px;}
.zig-body p{color:var(--c-text-2);font-size:16px;margin-bottom:16px;}
.zig-points{display:flex;flex-direction:column;gap:10px;margin-bottom:18px;}
.zig-points li{
  position:relative;
  padding-left:20px;
  color:var(--c-text-2);
  font-size:15px;
}
.zig-points li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:8px;height:2px;
  background:var(--c-glow);
  box-shadow:0 0 8px rgba(61,245,200,.8);
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--c-brand);
}
.text-link:hover{color:var(--c-glow);}
.text-link .arrow{transition:transform .2s ease;}
.text-link:hover .arrow{transform:translateX(4px);}

/* ============ 核对清单 ============ */
.check-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.check-col{
  padding:28px;
  border-radius:var(--r-card);
  background:var(--c-bg-1);
  border:1px solid var(--c-line);
  box-shadow:var(--shadow-card);
}
.check-col h3{
  font-size:20px;
  margin-bottom:8px;
  display:flex;
  align-items:center;
  gap:10px;
}
.check-col h3 .mark{
  width:24px;height:24px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:700;
}
.check-col.own h3 .mark{background:rgba(61,245,200,.14);color:var(--c-glow);border:1px solid var(--c-line-strong);}
.check-col.need h3 .mark{background:rgba(255,138,61,.14);color:var(--c-accent);border:1px solid rgba(255,138,61,.35);}
.check-col .hint{font-size:14px;color:var(--c-text-3);margin-bottom:18px;}
.check-list{display:flex;flex-direction:column;gap:0;}
.check-list li{
  display:flex;
  gap:14px;
  padding:16px 0;
  border-top:1px solid rgba(255,255,255,.06);
  font-size:15px;
  color:var(--c-text-2);
}
.check-list li:first-child{border-top:0;}
.check-list .idx{
  font-family:var(--mono);
  font-size:13px;
  color:var(--c-text-3);
  padding-top:3px;
  min-width:26px;
}
.check-list strong{color:var(--c-text);display:block;font-size:15px;margin-bottom:4px;font-weight:600;}

/* ============ FAQ ============ */
.faq-layout{
  display:grid;
  grid-template-columns:1fr 2fr;
  gap:40px;
  align-items:start;
}
.faq-aside h2{font-size:28px;margin-bottom:14px;}
.faq-aside p{color:var(--c-text-2);font-size:15px;margin-bottom:20px;}
.faq-aside .mini-card{
  padding:20px;
  border-radius:var(--r-card);
  background:var(--c-bg-1);
  border:1px solid var(--c-line);
}
.faq-aside .mini-card strong{
  font-family:var(--mono);
  color:var(--c-glow);
  display:block;
  font-size:20px;
  margin-bottom:6px;
}
.faq-aside .mini-card span{font-size:13px;color:var(--c-text-3);}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border-radius:14px;
  border:1px solid var(--c-line);
  background:var(--c-bg-1);
  overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item.open{border-color:var(--c-line-strong);}
.faq-q{
  width:100%;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 22px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--c-text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-glow);}
.faq-q .ico{
  flex:none;
  width:22px;height:22px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  line-height:1;
  color:var(--c-text-3);
  transition:transform .25s ease, color .25s ease;
}
.faq-item.open .faq-q .ico{transform:rotate(45deg);color:var(--c-glow);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease, opacity .3s ease;
  opacity:0;
}
.faq-item.open .faq-a{max-height:340px;opacity:1;}
.faq-a p{
  padding:0 22px 20px;
  color:var(--c-text-2);
  font-size:15px;
  line-height:1.8;
}

/* ============ CTA ============ */
.cta-panel{
  position:relative;
  border-radius:20px;
  padding:48px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:44px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:0 20px 60px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.07);
  overflow:hidden;
}
.cta-panel::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, var(--c-glow), transparent);
  opacity:.8;
}
.cta-panel h2{font-size:30px;margin-bottom:14px;}
.cta-panel .cta-desc{color:var(--c-text-2);font-size:16px;margin-bottom:22px;}
.cta-facts{display:flex;flex-wrap:wrap;gap:10px;}
.cta-form{display:flex;flex-direction:column;gap:16px;}
.field label{
  display:block;
  font-size:13px;
  color:var(--c-text-2);
  margin-bottom:8px;
}
.field input,
.field select{
  width:100%;
  height:48px;
  padding:0 14px;
  border-radius:var(--r-input);
  background:rgba(255,255,255,.04);
  border:1px solid var(--c-line);
  color:var(--c-text);
  transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--c-text-2) 50%),linear-gradient(135deg,var(--c-text-2) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
.field input::placeholder{color:var(--c-text-3);}
.field input:focus,
.field select:focus{
  outline:none;
  border-color:var(--c-glow);
  background:rgba(61,245,200,.05);
  box-shadow:0 0 0 3px rgba(61,245,200,.16);
}
.field.error input,
.field.error select{border-color:var(--c-err);}
.field .err-msg{
  display:none;
  margin-top:6px;
  font-size:12px;
  color:var(--c-err);
}
.field.error .err-msg{display:block;}
.form-note{font-size:12px;color:var(--c-text-3);line-height:1.7;}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--c-line);
  background:var(--c-bg-1);
  padding:64px 0 0;
  margin-top:96px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:32px;
  padding-bottom:48px;
}
.footer-brand .brand{padding:0 0 14px;}
.footer-brand p{
  color:var(--c-text-3);
  font-size:14px;
  max-width:320px;
}
.footer-col h4{
  font-size:15px;
  margin-bottom:16px;
  color:var(--c-text);
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li{font-size:14px;color:var(--c-text-3);}
.footer-col a{font-size:14px;color:var(--c-text-2);}
.footer-col a:hover{color:var(--c-glow);}
.footer-contact .mono{color:var(--c-text-2);}
.footer-bottom{
  border-top:1px solid var(--c-line);
  padding:20px 0 28px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--c-text-3);
}
.footer-bottom .lang span{color:var(--c-text-2);}

/* ============ 空态 / 骨架 / 提示 ============ */
.empty-state{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:12px;
  padding:56px 24px;
  border-radius:var(--r-card);
  border:1px dashed var(--c-line);
  background:var(--c-bg-1);
  color:var(--c-text-3);
  text-align:center;
}
.empty-state .icon{
  width:44px;height:44px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);
  color:var(--c-glow);
  font-size:20px;
}
.skeleton{
  border-radius:14px;
  height:16px;
  background:linear-gradient(90deg, rgba(255,255,255,.05) 0%, rgba(255,255,255,.12) 50%, rgba(255,255,255,.05) 100%);
  background-size:200% 100%;
  animation:breathe 1.6s ease-in-out infinite;
}
@keyframes breathe{
  0%{background-position:200% 0;}
  100%{background-position:-200% 0;}
}
.alert{
  padding:14px 18px;
  border-radius:12px;
  font-size:14px;
  border:1px solid var(--c-line);
  background:var(--c-bg-1);
  color:var(--c-text-2);
}
.alert.error{border-color:rgba(255,107,107,.45);color:var(--c-err);}
.alert .retry{color:var(--c-glow);margin-left:8px;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--container:1040px;--sec-pad:80px;}
  .page-hero h1{font-size:40px;}
}
@media (max-width:1023px){
  :root{--sec-pad:64px;}
  .nav-wrap{grid-template-columns:auto auto;justify-content:space-between;}
  .site-header{height:64px;}
  .nav-wrap{height:64px;}
  .nav-side{
    display:none;
    width:100%;
  }
  .nav-wrap > .brand{order:-1;}
  .site-header.menu-open .nav-wrap{
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    height:auto;
    padding-bottom:20px;
  }
  .site-header.menu-open{height:auto;}
  .site-header.menu-open .nav-side{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    order:2;
    margin-top:8px;
  }
  .site-header.menu-open .nav-side.right{order:3;}
  .site-header.menu-open .nav-link{
    height:48px;
    display:flex;
    align-items:center;
    border-bottom:1px solid var(--c-line);
    font-size:15px;
    padding:0;
  }
  .site-header.menu-open .nav-link::after{display:none;}
  .site-header.menu-open .nav-cta{margin-top:16px;width:100%;justify-content:center;}
  .nav-toggle{display:inline-flex;position:absolute;right:16px;top:11px;}
  .nav-wrap{position:relative;}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .cta-panel{grid-template-columns:1fr;padding:36px;gap:32px;}
  .zig-row{grid-template-columns:1fr;gap:24px;padding:22px;}
  .zig-row.reverse .zig-media{order:0;}
  .zig-row.reverse .zig-body{order:0;}
  .check-wrap{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .page-hero{padding:92px 0 60px;}
  .page-hero h1{font-size:34px;}
}
@media (max-width:767px){
  :root{--sec-pad:48px;}
  body{font-size:16px;}
  .container{padding:0 16px;}
  .page-hero{padding:80px 0 48px;min-height:420px;}
  .page-hero h1{font-size:30px;margin:16px 0 14px;}
  .page-hero .lead{font-size:15px;}
  .hero-meta{gap:10px;}
  .hero-meta .meta-cell{padding:8px 12px;}
  .subnav{border-radius:16px;flex-direction:column;width:100%;}
  .subnav a{width:100%;text-align:center;border:1px solid var(--c-line);}
  .section-head h2{font-size:24px;}
  .zig-body h3{font-size:19px;}
  .faq-aside h2{font-size:23px;}
  .cta-panel{padding:26px;border-radius:16px;}
  .cta-panel h2{font-size:23px;}
  .btn{width:100%;}
  .nav-cta{width:100%;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .site-footer{margin-top:64px;}
  .brand-main{font-size:19px;}
}
@media (max-width:520px){
  .page-hero h1{font-size:27px;}
  .btn{height:46px;font-size:14px;}
  .hero-meta .meta-cell{flex-direction:column;align-items:flex-start;gap:2px;}
  .faq-q{font-size:15px;padding:14px 16px;}
  .faq-a p{padding:0 16px 18px;}
  .check-col{padding:22px;}
}

/* roulang page: category2 */
:root{
  --c-bg-0:#050B14;
  --c-bg-1:#0A1526;
  --c-bg-2:#0D1B30;
  --c-surface:rgba(255,255,255,0.06);
  --c-line:rgba(255,255,255,0.10);
  --c-line-glow:rgba(61,245,200,0.35);
  --c-brand:#2E6BFF;
  --c-glow:#3DF5C8;
  --c-accent:#FF8A3D;
  --c-text:#EAF2FF;
  --c-text-2:#A7B8CE;
  --c-text-3:#6C7F97;
  --c-danger:#FF6B6B;
  --c-warn:#FFB43A;
  --r-card:16px;
  --r-btn:12px;
  --r-input:10px;
  --sh-card:0 8px 32px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --sh-glow:0 0 0 1px rgba(61,245,200,.5), 0 10px 30px rgba(61,245,200,.22);
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  background:var(--c-bg-0);
  color:var(--c-text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.2px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--c-text-2);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-glow);}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:none;cursor:pointer;}
ul{list-style:none;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
:focus-visible{outline:2px solid var(--c-glow);outline-offset:3px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(5,11,20,.72);
  border-bottom:1px solid var(--c-line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background .25s ease, box-shadow .25s ease;
}
.site-header.scrolled{
  background:rgba(5,11,20,.92);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:72px;
  gap:16px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-side.left{justify-content:flex-start;}
.nav-side.right{justify-content:flex-end;gap:22px;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--c-text-2);
  padding:6px 2px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;left:0;right:100%;bottom:0;
  height:2px;background:var(--c-glow);border-radius:2px;
  transition:right .22s ease;
}
.nav-link:hover{color:var(--c-brand);}
.nav-link:hover::after{right:0;background:var(--c-brand);}
.nav-link.active{color:var(--c-glow);}
.nav-link.active::after{right:0;background:var(--c-glow);}
.brand{
  display:flex;align-items:baseline;gap:6px;justify-content:center;
  font-weight:700;letter-spacing:-.3px;color:var(--c-text);
}
.brand-main{font-size:21px;color:var(--c-text);}
.brand-sub{font-size:13px;color:var(--c-glow);letter-spacing:1px;}
.brand:hover .brand-main{color:var(--c-glow);}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--c-glow);color:#04121A;
  font-size:14px;font-weight:700;
  padding:10px 20px;border-radius:var(--r-btn);
  box-shadow:var(--sh-glow);
  transition:transform .2s ease, box-shadow .2s ease, filter .2s ease;
}
.nav-cta:hover{color:#04121A;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(61,245,200,.6),0 14px 36px rgba(61,245,200,.3);}
.nav-toggle{display:none;}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;position:relative;}
.section.alt{background:var(--c-bg-1);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.section-head{max-width:760px;margin-bottom:40px;}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:1.4px;
  color:var(--c-glow);
  border:1px solid var(--c-line-glow);
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:18px;
  background:rgba(61,245,200,.06);
}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.2;font-weight:700;letter-spacing:-.5px;}
h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;font-weight:700;letter-spacing:-.3px;margin-bottom:14px;}
h3{font-size:clamp(18px,1.8vw,22px);line-height:1.4;font-weight:700;}
h4{font-size:16px;font-weight:700;}
p{color:var(--c-text-2);}
.lead{font-size:17px;line-height:1.85;color:var(--c-text-2);}

/* ---------- 分类页 Hero ---------- */
.page-hero{
  position:relative;
  padding:150px 0 72px;
  background-image:linear-gradient(180deg, rgba(5,11,20,.86) 0%, rgba(5,11,20,.94) 62%, var(--c-bg-0) 100%), url('/assets/images/backpic/back-2.webp');
  background-size:cover, cover;
  background-position:center, center;
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-line-glow),transparent);
}
.page-hero .hero-grid{
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);
  gap:48px;align-items:end;
}
.page-hero h1{max-width:16em;}
.page-hero .lead{margin-top:20px;max-width:44em;}
.hero-facts{
  display:grid;gap:14px;padding:24px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--sh-card);
}
.hero-facts .fact{display:flex;align-items:baseline;justify-content:space-between;gap:12px;border-bottom:1px dashed var(--c-line);padding-bottom:12px;}
.hero-facts .fact:last-child{border-bottom:none;padding-bottom:0;}
.hero-facts .fact span:first-child{font-size:13px;color:var(--c-text-3);}
.hero-facts .fact strong{font-family:var(--font-mono);font-size:20px;color:var(--c-glow);font-weight:600;}

.anchor-nav{
  margin-top:36px;display:flex;flex-wrap:wrap;gap:10px;
}
.anchor-nav a{
  display:inline-flex;align-items:center;
  font-size:13px;color:var(--c-text-2);
  border:1px solid var(--c-line);
  border-radius:999px;
  padding:8px 16px;
  background:rgba(255,255,255,.03);
  transition:all .2s ease;
}
.anchor-nav a:hover{color:var(--c-glow);border-color:var(--c-line-glow);background:rgba(61,245,200,.07);transform:translateY(-1px);}

/* ---------- 编号信息列表 + 右侧摘要卡 ---------- */
.split-layout{
  display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);
  gap:40px;align-items:start;
}
.step-item{
  display:grid;grid-template-columns:64px minmax(0,1fr) 200px;
  gap:24px;align-items:start;
  background:var(--c-bg-2);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--sh-card);
  margin-bottom:20px;
  transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.step-item:hover{transform:translateY(-3px);border-color:rgba(61,245,200,.28);}
.step-no{
  font-family:var(--font-mono);font-size:26px;font-weight:700;
  color:var(--c-glow);line-height:1;padding-top:4px;
}
.step-item h3{margin-bottom:10px;}
.step-item p{font-size:15px;line-height:1.8;margin-bottom:14px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  font-size:12px;color:var(--c-text-2);
  border:1px solid var(--c-line);
  border-radius:999px;
  padding:4px 12px;
  background:rgba(255,255,255,.03);
}
.tag.accent{color:var(--c-accent);border-color:rgba(255,138,61,.4);background:rgba(255,138,61,.08);}
.step-thumb{
  border-radius:12px;overflow:hidden;
  border:1px solid var(--c-line);
  aspect-ratio:16/9;
  background:var(--c-bg-1);
}
.step-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.step-item:hover .step-thumb img{transform:scale(1.03);}

.sticky-card{
  position:sticky;top:96px;
  background:var(--c-bg-2);
  border:1px solid var(--c-line);
  border-top:1px solid var(--c-line-glow);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--sh-card);
}
.sticky-card h3{font-size:18px;margin-bottom:6px;}
.sticky-card .sub{font-size:13px;color:var(--c-text-3);margin-bottom:18px;}
.spec-list{display:grid;gap:14px;margin-bottom:22px;}
.spec-list li{display:grid;gap:4px;padding-bottom:14px;border-bottom:1px dashed var(--c-line);}
.spec-list li:last-child{border-bottom:none;padding-bottom:0;}
.spec-list .k{font-size:12px;color:var(--c-text-3);letter-spacing:.6px;}
.spec-list .v{font-size:14px;color:var(--c-text);line-height:1.7;}
.spec-list .v .mono{color:var(--c-glow);font-size:15px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;
  padding:13px 26px;border-radius:var(--r-btn);
  transition:transform .18s ease, box-shadow .18s ease, filter .18s ease, border-color .18s ease, background .18s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--c-glow);color:#04121A;
  box-shadow:var(--sh-glow);
}
.btn-primary:hover{color:#04121A;filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(61,245,200,.6),0 14px 36px rgba(61,245,200,.32);}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(61,245,200,.45),0 6px 16px rgba(61,245,200,.2);}
.btn-ghost{
  background:transparent;color:var(--c-text);
  border:1px solid var(--c-line);
}
.btn-ghost:hover{color:var(--c-glow);border-color:var(--c-line-glow);background:rgba(61,245,200,.06);transform:translateY(-1px);}
.btn-block{width:100%;}

/* ---------- 结论条 ---------- */
.conclusion{
  margin-top:8px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  background:linear-gradient(90deg, rgba(46,107,255,.14), rgba(61,245,200,.10));
  border:1px solid var(--c-line);
  border-left:3px solid var(--c-glow);
  border-radius:var(--r-card);
  padding:22px 26px;
}
.conclusion p{font-size:15px;color:var(--c-text);margin:0;}
.conclusion .mono{color:var(--c-glow);}

/* ---------- 对照表 ---------- */
.compare-wrap{overflow-x:auto;border:1px solid var(--c-line);border-radius:var(--r-card);background:var(--c-bg-2);}
table.compare{width:100%;border-collapse:collapse;min-width:560px;}
table.compare th,table.compare td{
  text-align:left;padding:16px 20px;font-size:14px;border-bottom:1px solid var(--c-line);
}
table.compare th{font-size:13px;color:var(--c-text-3);letter-spacing:.8px;background:rgba(255,255,255,.03);}
table.compare td{color:var(--c-text-2);}
table.compare tbody tr:nth-child(even){background:rgba(255,255,255,.03);}
table.compare tbody tr:last-child td{border-bottom:none;}
table.compare td strong{color:var(--c-text);font-weight:600;}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:48px;align-items:start;}
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:64px;padding:16px 4px;
  text-align:left;font-size:16px;font-weight:600;color:var(--c-text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-glow);}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--c-line);
  display:grid;place-items:center;
  font-size:16px;color:var(--c-text-2);
  transition:transform .25s ease, color .2s ease, border-color .2s ease, background .2s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--c-glow);border-color:var(--c-line-glow);background:rgba(61,245,200,.08);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-a p{font-size:15px;line-height:1.8;color:var(--c-text-2);padding:0 4px 20px;}
.faq-item.is-open .faq-a{max-height:320px;}

/* ---------- CTA ---------- */
.cta-section{padding:96px 0;}
.cta-panel{
  position:relative;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:44px;
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--sh-card);
  overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-glow),transparent);
}
.cta-panel h2{margin-bottom:12px;}
.cta-panel .lead{font-size:16px;}
.cta-points{margin-top:22px;display:grid;gap:10px;}
.cta-points li{display:flex;gap:10px;font-size:14px;color:var(--c-text-2);}
.cta-points li::before{content:"";flex:0 0 auto;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--c-glow);}

.form-grid{display:grid;gap:16px;}
.field{display:grid;gap:8px;}
.field label{font-size:13px;color:var(--c-text-2);}
.field input,.field select{
  width:100%;
  background:rgba(255,255,255,.04);
  border:1px solid var(--c-line);
  border-radius:var(--r-input);
  padding:12px 14px;
  font-size:15px;color:var(--c-text);
  transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.field input::placeholder{color:var(--c-text-3);}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--c-glow);
  box-shadow:0 0 0 3px rgba(61,245,200,.18);
  background:rgba(61,245,200,.04);
}
.field select option{background:var(--c-bg-1);color:var(--c-text);}
.form-note{font-size:12px;color:var(--c-text-3);line-height:1.7;margin-top:4px;}
.btn[disabled]{background:rgba(255,255,255,.25);color:rgba(4,18,26,.7);box-shadow:none;cursor:not-allowed;filter:saturate(.3);}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--c-line);
  background:var(--c-bg-1);
  padding:72px 0 0;
  margin-top:8px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.2fr);
  gap:36px;
  padding-bottom:48px;
}
.footer-brand .brand{justify-content:flex-start;margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--c-text-3);max-width:32em;}
.footer-col h4{font-size:14px;color:var(--c-text);margin-bottom:16px;letter-spacing:.6px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{font-size:14px;color:var(--c-text-3);}
.footer-col a{font-size:14px;color:var(--c-text-2);}
.footer-col a:hover{color:var(--c-glow);}
.footer-contact .mono{color:var(--c-text-2);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  border-top:1px solid var(--c-line);
  padding:22px 0 28px;
  font-size:13px;color:var(--c-text-3);
}
.footer-bottom .lang span{color:var(--c-text-2);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1040px;}
  .step-item{grid-template-columns:56px minmax(0,1fr) 168px;gap:20px;}
}
@media (max-width:1023px){
  .container{max-width:100%;padding:0 20px;}
  .section{padding:64px 0;}
  .cta-section{padding:64px 0;}
  .page-hero{padding:132px 0 56px;}
  .page-hero .hero-grid{grid-template-columns:1fr;gap:32px;align-items:start;}
  .split-layout{grid-template-columns:1fr;gap:28px;}
  .sticky-card{position:static;}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .cta-panel{grid-template-columns:1fr;padding:34px;gap:32px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  body{font-size:16px;}
  .site-header .nav-wrap{
    grid-template-columns:1fr auto;
    height:64px;
    gap:0;
  }
  .brand{justify-content:flex-start;grid-row:1;grid-column:1;}
  .brand-main{font-size:19px;}
  .nav-side.left{display:none;}
  .nav-side.right{grid-row:1;grid-column:2;gap:0;}
  .nav-side.right .nav-link,
  .nav-side.right .nav-cta{display:none;}
  .nav-toggle{
    display:grid;place-items:center;
    width:44px;height:44px;border-radius:10px;
    border:1px solid var(--c-line);
  }
  .nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
    display:block;width:18px;height:2px;background:var(--c-text);border-radius:2px;content:"";
    position:relative;transition:transform .2s ease, opacity .2s ease;
  }
  .nav-toggle span::before{position:absolute;top:-6px;}
  .nav-toggle span::after{position:absolute;top:6px;}
  body.nav-open .nav-toggle span{background:var(--c-glow);}
  body.nav-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg);}
  body.nav-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg);}
  body.nav-open .nav-side.left{
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    grid-row:2;grid-column:1 / -1;
    border-top:1px solid var(--c-line);
  }
  body.nav-open .nav-side.right{
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    grid-row:3;grid-column:1 / -1;
    padding-bottom:16px;
  }
  body.nav-open .nav-side.left .nav-link,
  body.nav-open .nav-side.right .nav-link{
    display:flex;align-items:center;
    height:48px;font-size:15px;
    border-bottom:1px solid var(--c-line);
  }
  body.nav-open .nav-side.left .nav-link::after,
  body.nav-open .nav-side.right .nav-link::after{display:none;}
  body.nav-open .nav-side.right .nav-cta{
    display:inline-flex;justify-content:center;margin-top:16px;
  }
  .site-header{background:rgba(5,11,20,.96);}
  .page-hero{padding:112px 0 48px;min-height:420px;}
  .section{padding:48px 0;}
  .cta-section{padding:48px 0;}
  .step-item{grid-template-columns:1fr;gap:14px;padding:22px;}
  .step-no{font-size:22px;}
  .step-thumb{max-width:100%;}
  .cta-panel{padding:24px;}
  .btn{width:100%;}
  .anchor-nav a{font-size:12px;padding:7px 13px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  .hero-facts{padding:18px;}
  .sticky-card{padding:20px;}
  .conclusion{padding:18px 20px;}
  table.compare th,table.compare td{padding:12px 14px;font-size:13px;}
}

/* roulang page: category3 */
:root{
  --c-bg-0:#050B14;
  --c-bg-1:#0A1526;
  --c-bg-2:#08111F;
  --c-surface:rgba(255,255,255,.06);
  --c-line:rgba(255,255,255,.10);
  --c-line-strong:rgba(61,245,200,.35);
  --c-brand:#2E6BFF;
  --c-glow:#3DF5C8;
  --c-accent:#FF8A3D;
  --c-text:#EAF2FF;
  --c-text-2:#A7B8CE;
  --c-text-3:#6C7F97;
  --c-ok:#3DF5C8;
  --c-warn:#FFB43A;
  --c-err:#FF6B6B;
  --c-disabled:rgba(255,255,255,.25);
  --r-card:16px;
  --r-btn:12px;
  --r-input:10px;
  --r-pill:999px;
  --shadow-card:0 8px 32px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-glow:0 0 0 1px rgba(61,245,200,.5), 0 10px 30px rgba(61,245,200,.22);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","DIN Alternate","SFMono-Regular",ui-monospace,Consolas,monospace;
  --sec-pad:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg-0);
  color:var(--c-text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.1px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--c-text-2);text-decoration:none;transition:color .2s ease,border-color .2s ease;}
a:hover{color:var(--c-glow);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.5px;line-height:1.28;}
p{margin:0;}
.mono{font-family:var(--font-mono);letter-spacing:0;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--sec-pad) 0;position:relative;}
.section--panel{background:var(--c-bg-1);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.sec-head{max-width:720px;margin-bottom:40px;}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:2px;color:var(--c-glow);
  font-family:var(--font-mono);text-transform:uppercase;
  margin-bottom:14px;
}
.sec-eyebrow::before{content:"";width:24px;height:2px;background:var(--c-glow);display:block;border-radius:2px;opacity:.8;}
.sec-title{font-size:clamp(24px,3vw,32px);margin-bottom:14px;}
.sec-desc{color:var(--c-text-2);font-size:16px;max-width:680px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--c-glow);color:#04121A;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{color:#04121A;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(61,245,200,.6),0 14px 38px rgba(61,245,200,.32);}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(61,245,200,.5),0 6px 18px rgba(61,245,200,.2);}
.btn-ghost{
  background:transparent;color:var(--c-text);border-color:var(--c-line);
}
.btn-ghost:hover{color:var(--c-glow);border-color:var(--c-line-strong);background:rgba(61,245,200,.06);transform:translateY(-1px);}
.btn:focus-visible{outline:2px solid var(--c-glow);outline-offset:3px;}
.btn[disabled],.btn.is-disabled{filter:saturate(.3);box-shadow:none;cursor:not-allowed;opacity:.6;}
.btn-block{width:100%;}

/* ============ 标签 / 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;letter-spacing:.4px;
  background:rgba(46,107,255,.14);color:#9DBBFF;border:1px solid rgba(46,107,255,.32);
}
.badge--glow{background:rgba(61,245,200,.12);color:var(--c-glow);border-color:rgba(61,245,200,.3);}
.badge--accent{background:rgba(255,138,61,.12);color:var(--c-accent);border-color:rgba(255,138,61,.3);}
.badge--muted{background:rgba(255,255,255,.05);color:var(--c-text-3);border-color:var(--c-line);}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  height:72px;
  background:rgba(5,11,20,.72);
  border-bottom:1px solid var(--c-line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background .25s ease,box-shadow .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{background:rgba(5,11,20,.9);box-shadow:0 12px 34px rgba(0,0,0,.5);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:18px;}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-side.left{flex:1;justify-content:flex-start;}
.nav-side.right{flex:1;justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;color:var(--c-text-2);padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--c-glow);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-brand);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--c-glow);}
.nav-link.active::after{transform:scaleX(1);}
.brand{display:inline-flex;align-items:baseline;gap:6px;color:var(--c-text);flex-shrink:0;}
.brand-main{font-size:22px;font-weight:700;letter-spacing:1px;color:#fff;}
.brand-sub{
  font-size:12px;letter-spacing:2px;color:var(--c-glow);
  border:1px solid rgba(61,245,200,.35);border-radius:var(--r-pill);
  padding:2px 8px;transform:translateY(-2px);
}
.brand:hover .brand-main{color:var(--c-glow);}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:11px 20px;border-radius:var(--r-btn);
  background:var(--c-glow);color:#04121A;font-size:14px;font-weight:700;
  box-shadow:0 0 0 1px rgba(61,245,200,.45),0 8px 24px rgba(61,245,200,.2);
}
.nav-cta:hover{color:#04121A;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(61,245,200,.6),0 12px 30px rgba(61,245,200,.3);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.05);border:1px solid var(--c-line);
  align-items:center;justify-content:center;cursor:pointer;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-text);position:relative;border-radius:2px;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-text);border-radius:2px;
  transition:transform .2s ease,top .2s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg);background:var(--c-glow);}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg);background:var(--c-glow);}
.mobile-panel{
  position:fixed;top:72px;left:0;right:0;z-index:110;
  background:rgba(8,17,31,.97);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--c-line);
  transform:translateY(-12px);opacity:0;pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;
  max-height:calc(100vh - 72px);overflow-y:auto;
}
.mobile-panel.is-open{transform:translateY(0);opacity:1;pointer-events:auto;}
.mobile-panel a{
  display:flex;align-items:center;height:48px;padding:0 24px;
  border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-text-2);
}
.mobile-panel a.active{color:var(--c-glow);}
.mobile-panel .mp-cta{margin:18px 24px 24px;height:48px;border-bottom:none;justify-content:center;font-weight:700;}

/* ============ 面包屑 ============ */
.crumb{padding:100px 0 0;font-size:13px;color:var(--c-text-3);}
.crumb-inner{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb a{color:var(--c-text-3);}
.crumb a:hover{color:var(--c-glow);}
.crumb .sep{color:rgba(255,255,255,.2);}
.crumb .cur{color:var(--c-text-2);}

/* ============ 小号 Hero ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:34px 0 64px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(5,11,20,.82) 0%,rgba(5,11,20,.92) 55%,rgba(5,11,20,1) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.85;z-index:-1;
}
.page-hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  border:1px solid rgba(61,245,200,.08);box-shadow:0 0 0 60px rgba(61,245,200,.02);
  z-index:-1;pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:40px;align-items:start;}
.page-hero h1{
  font-size:clamp(30px,4.2vw,48px);margin:18px 0 18px;color:#fff;max-width:780px;
}
.page-hero .lead{color:var(--c-text-2);font-size:16.5px;max-width:640px;margin-bottom:14px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.glass-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding:26px;
}
.hero-aside{margin-top:18px;}
.hero-aside h3{font-size:16px;margin-bottom:16px;color:#fff;letter-spacing:0;}
.mini-list li{
  display:flex;justify-content:space-between;gap:16px;align-items:baseline;
  padding:12px 0;border-bottom:1px dashed var(--c-line);font-size:14px;color:var(--c-text-2);
}
.mini-list li:last-child{border-bottom:none;padding-bottom:0;}
.mini-list .v{font-family:var(--font-mono);color:var(--c-glow);font-size:15px;}

/* 页内导览条 */
.tour{
  margin-top:36px;display:flex;flex-wrap:wrap;gap:10px;
  padding:14px;border-radius:var(--r-card);
  border:1px solid var(--c-line);background:rgba(255,255,255,.03);
}
.tour a{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--c-text-2);
  border:1px solid var(--c-line);background:rgba(255,255,255,.03);
}
.tour a:hover{color:var(--c-glow);border-color:var(--c-line-strong);background:rgba(61,245,200,.06);}
.tour a .n{font-family:var(--font-mono);color:var(--c-glow);font-size:12px;}

/* ============ 数据条 ============ */
.stats-band{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;
  background:var(--c-line);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
}
.stat{background:var(--c-bg-1);padding:26px 24px;}
.stat .num{
  font-family:var(--font-mono);font-size:clamp(24px,3vw,34px);font-weight:700;color:var(--c-glow);
  text-shadow:0 0 22px rgba(61,245,200,.35);line-height:1.1;
}
.stat .num small{font-size:14px;margin-left:2px;color:var(--c-text-2);text-shadow:none;}
.stat .lbl{font-size:13.5px;color:var(--c-text-2);margin-top:8px;}

/* ============ 时间线 ============ */
.timeline{position:relative;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;left:23px;top:12px;bottom:12px;width:2px;
  background:linear-gradient(180deg,rgba(61,245,200,.55),rgba(46,107,255,.35) 60%,rgba(255,255,255,.06));
  border-radius:2px;
}
.tl-item{position:relative;padding-left:72px;padding-bottom:46px;}
.tl-item:last-child{padding-bottom:0;}
.tl-node{
  position:absolute;left:0;top:2px;width:48px;height:48px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:14px;font-weight:700;color:var(--c-glow);
  background:var(--c-bg-1);border:1px solid var(--c-line-strong);
  box-shadow:0 0 0 6px rgba(61,245,200,.05);
}
.tl-card{
  background:var(--c-bg-1);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);padding:26px;
  display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:26px;align-items:start;
  transition:transform .2s ease,border-color .2s ease;
}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(61,245,200,.28);}
.tl-card h3{font-size:20px;margin-bottom:12px;color:#fff;letter-spacing:0;}
.tl-card p{color:var(--c-text-2);font-size:15px;margin-bottom:14px;}
.tl-points li{
  position:relative;padding-left:18px;font-size:14px;color:var(--c-text-2);line-height:1.9;
}
.tl-points li::before{
  content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;
  background:var(--c-glow);box-shadow:0 0 8px rgba(61,245,200,.6);
}
.tl-thumb{
  border-radius:12px;overflow:hidden;border:1px solid var(--c-line);aspect-ratio:16/10;background:var(--c-bg-2);
}
.tl-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.tl-card:hover .tl-thumb img{transform:scale(1.04);}
.tl-tag{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px;}

/* ============ 规格对照 ============ */
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.spec-card{
  background:var(--c-bg-1);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow-card);
}
.spec-card h3{font-size:19px;margin-bottom:14px;color:#fff;letter-spacing:0;}
.spec-row{
  display:flex;justify-content:space-between;gap:16px;padding:11px 0;
  border-bottom:1px dashed var(--c-line);font-size:14px;
}
.spec-row:last-child{border-bottom:none;}
.spec-row span:first-child{color:var(--c-text-3);}
.spec-row span:last-child{color:var(--c-text);font-family:var(--font-mono);}
.spec-card p{color:var(--c-text-2);font-size:15px;}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:44px;align-items:start;}
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:18px 4px;background:none;border:none;cursor:pointer;
  text-align:left;color:var(--c-text);font-size:16px;font-weight:600;line-height:1.6;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-glow);}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--c-line);color:var(--c-glow);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;line-height:1;font-family:var(--font-mono);
  transition:transform .22s ease,border-color .22s ease,background .22s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:var(--c-line-strong);background:rgba(61,245,200,.08);}
.faq-a{
  max-height:0;overflow:hidden;opacity:0;
  transition:max-height .3s ease,opacity .3s ease;
}
.faq-item.is-open .faq-a{opacity:1;}
.faq-a-inner{padding:0 4px 20px;color:var(--c-text-2);font-size:15px;line-height:1.8;max-width:640px;}
.faq-a-inner li{position:relative;padding-left:16px;}
.faq-a-inner li::before{content:"";position:absolute;left:0;top:12px;width:5px;height:5px;border-radius:50%;background:var(--c-brand);}

/* ============ CTA ============ */
.cta-panel{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  padding:40px;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-glow),transparent);
  opacity:.9;
}
.cta-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:44px;align-items:start;}
.cta-grid h2{font-size:clamp(22px,2.8vw,30px);margin-bottom:14px;}
.cta-grid p{color:var(--c-text-2);font-size:15.5px;margin-bottom:18px;}
.cta-points li{position:relative;padding-left:20px;font-size:14.5px;color:var(--c-text-2);line-height:2;}
.cta-points li::before{
  content:"";position:absolute;left:0;top:13px;width:8px;height:2px;background:var(--c-glow);border-radius:2px;
}
.form-grid{display:grid;gap:16px;}
.field label{display:block;font-size:13.5px;color:var(--c-text-2);margin-bottom:8px;}
.field input,.field select{
  width:100%;padding:13px 15px;font-size:15px;font-family:inherit;
  color:var(--c-text);background:rgba(255,255,255,.04);
  border:1px solid var(--c-line);border-radius:var(--r-input);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
  appearance:none;
}
.field select{background-image:linear-gradient(45deg,transparent 50%,var(--c-text-3) 50%),linear-gradient(135deg,var(--c-text-3) 50%,transparent 50%);
  background-position:calc(100% - 20px) 22px,calc(100% - 14px) 22px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
.field input::placeholder{color:var(--c-text-3);}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--c-glow);background:rgba(61,245,200,.05);
  box-shadow:0 0 0 3px rgba(61,245,200,.16);
}
.field.has-error input,.field.has-error select{border-color:var(--c-err);box-shadow:0 0 0 3px rgba(255,107,107,.14);}
.field .err-tip{display:none;margin-top:8px;font-size:13px;color:var(--c-err);}
.field.has-error .err-tip{display:block;}
.form-note{margin-top:14px;font-size:13px;color:var(--c-text-3);}
.form-ok{
  display:none;margin-top:14px;padding:12px 14px;border-radius:var(--r-input);
  background:rgba(61,245,200,.08);border:1px solid rgba(61,245,200,.3);color:var(--c-glow);font-size:14px;
}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--c-line);background:var(--c-bg-1);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,3fr) minmax(0,3fr) minmax(0,4fr);gap:36px;}
.footer-brand p{color:var(--c-text-2);font-size:14px;margin-top:16px;max-width:340px;line-height:1.85;}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.5px;}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul li a{font-size:14px;color:var(--c-text-2);}
.footer-col ul li a:hover{color:var(--c-glow);}
.footer-contact li{font-size:14px;color:var(--c-text-2);}
.footer-bottom{
  margin-top:48px;padding:22px 0;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--c-text-3);
}
.footer-bottom .lang span{color:var(--c-text-2);}

/* ============ 状态样式 ============ */
.skeleton{
  border-radius:var(--r-card);height:120px;
  background:linear-gradient(90deg,rgba(255,255,255,.04) 25%,rgba(255,255,255,.09) 37%,rgba(255,255,255,.04) 63%);
  background-size:400% 100%;animation:pulse 1.4s ease infinite;
}
@keyframes pulse{0%{background-position:100% 50%;}100%{background-position:0 50%;}}
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:48px 24px;border:1px dashed var(--c-line);border-radius:var(--r-card);
  color:var(--c-text-3);text-align:center;font-size:14px;
}
.empty-state .ico{width:44px;height:44px;border-radius:50%;border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center;color:var(--c-glow);font-family:var(--font-mono);}
.error-state{
  border:1px solid rgba(255,107,107,.4);border-radius:var(--r-card);padding:24px;
  background:rgba(255,107,107,.06);color:#FFC9C9;font-size:14px;
}
.error-state a{color:var(--c-glow);margin-left:8px;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:1040px;}
  .tl-card{grid-template-columns:minmax(0,1fr) 210px;}
}
@media (max-width:1023px){
  :root{--sec-pad:64px;}
  .nav-side{gap:18px;}
  .nav-side .nav-link{display:none;}
  .nav-side.left,.nav-side.right{flex:0 0 auto;}
  .nav-toggle{display:flex;}
  .nav-cta.desktop-only{display:none;}
  .nav-wrap{justify-content:space-between;}
  .nav-side.left{order:1;}
  .brand{order:2;}
  .nav-side.right{order:3;gap:0;}
  .hero-grid{grid-template-columns:1fr;gap:28px;}
  .hero-aside{margin-top:0;}
  .stats-band{grid-template-columns:repeat(2,1fr);}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .cta-grid{grid-template-columns:1fr;gap:30px;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
  .spec-grid{grid-template-columns:1fr;}
  .timeline::before{left:19px;}
  .tl-item{padding-left:60px;}
  .tl-node{width:40px;height:40px;font-size:13px;}
  .tl-card{grid-template-columns:1fr;gap:20px;}
  .tl-thumb{order:-1;aspect-ratio:16/9;}
}
@media (max-width:767px){
  :root{--sec-pad:48px;}
  .container{padding:0 16px;}
  body{font-size:16px;}
  .page-hero{padding:24px 0 48px;}
  .page-hero h1{font-size:clamp(26px,7vw,34px);}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .crumb{padding-top:92px;}
  .tour a{width:100%;}
  .stats-band{grid-template-columns:1fr;}
  .timeline::before{left:15px;}
  .tl-item{padding-left:48px;padding-bottom:34px;}
  .tl-node{width:32px;height:32px;font-size:12px;}
  .tl-card{padding:20px;}
  .cta-panel{padding:24px;}
  .faq-q{font-size:15px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .brand-main{font-size:19px;}
  .brand-sub{font-size:11px;letter-spacing:1px;}
}

/* roulang page: category4 */
:root{
  --c-bg-0:#050B14;
  --c-bg-1:#0A1526;
  --c-bg-2:#0D1B30;
  --c-surface:rgba(255,255,255,0.06);
  --c-surface-2:rgba(255,255,255,0.04);
  --c-line:rgba(255,255,255,0.10);
  --c-line-strong:rgba(61,245,200,0.35);
  --c-brand:#2E6BFF;
  --c-glow:#3DF5C8;
  --c-accent:#FF8A3D;
  --c-text:#EAF2FF;
  --c-text-2:#A7B8CE;
  --c-text-3:#6C7F97;
  --c-warn:#FFB43A;
  --c-error:#FF6B6B;
  --radius-card:16px;
  --radius-btn:12px;
  --radius-input:10px;
  --shadow-card:0 8px 32px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.06);
  --shadow-glow:0 0 0 1px rgba(61,245,200,0.5), 0 10px 30px rgba(61,245,200,0.22);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --space-section:96px;
}

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

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

body{
  margin:0;
  background:var(--c-bg-0);
  color:var(--c-text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:0.01em;
  overflow-x:hidden;
}

img{max-width:100%;display:block;border:0;}
a{color:var(--c-text-2);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-glow);}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.5px;line-height:1.28;}
h2{font-size:30px;margin-bottom:14px;}
h3{font-size:21px;letter-spacing:-0.2px;}
p{margin:0 0 14px;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input,select{font-family:inherit;}

.mono{font-family:var(--font-mono);letter-spacing:0;}

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

.section{padding:var(--space-section) 0;position:relative;}
.section-tight{padding:72px 0;}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head p{color:var(--c-text-2);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--c-glow);
  letter-spacing:0.08em;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";width:22px;height:1px;background:var(--c-glow);opacity:.7;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .22s ease, background .2s ease, border-color .2s ease, color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--c-glow);
  color:#04121A;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{
  background:#55F7CF;
  color:#04121A;
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(61,245,200,0.62), 0 14px 38px rgba(61,245,200,0.3);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(61,245,200,0.45), 0 6px 16px rgba(61,245,200,0.2);}
.btn-ghost{
  background:transparent;
  border-color:var(--c-line);
  color:var(--c-text);
}
.btn-ghost:hover{
  border-color:var(--c-line-strong);
  background:rgba(61,245,200,0.06);
  color:var(--c-glow);
  transform:translateY(-1px);
}
.btn:focus-visible{
  outline:2px solid var(--c-glow);
  outline-offset:2px;
}
.btn[disabled],.btn.is-disabled{
  filter:saturate(.3);
  opacity:.55;
  box-shadow:none;
  cursor:not-allowed;
  transform:none;
}
.btn-block{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  border:1px solid var(--c-line);
  background:var(--c-surface-2);
  color:var(--c-text-2);
}
.badge-glow{border-color:var(--c-line-strong);color:var(--c-glow);background:rgba(61,245,200,0.08);}
.badge-accent{border-color:rgba(255,138,61,0.4);color:var(--c-accent);background:rgba(255,138,61,0.08);}
.badge-brand{border-color:rgba(46,107,255,0.45);color:#8FAEFF;background:rgba(46,107,255,0.12);}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  height:72px;
  border-bottom:1px solid var(--c-line);
  background:linear-gradient(180deg, rgba(5,11,20,0.85), rgba(5,11,20,0.45));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.site-header.scrolled{
  background:rgba(6,13,24,0.9);
  box-shadow:0 10px 30px rgba(0,0,0,0.45);
}
.nav-wrap{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.nav-side{
  display:flex;align-items:center;gap:22px;
  flex:1 1 0;
}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--c-text-2);
  padding:6px 0;
}
.nav-link::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--c-glow);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-brand);}
.nav-link:hover::after{transform:scaleX(1);background:var(--c-brand);}
.nav-link.active{color:var(--c-glow);}
.nav-link.active::after{transform:scaleX(1);}
.brand{
  display:flex;flex-direction:column;align-items:center;
  line-height:1.1;
  flex:0 0 auto;
  color:var(--c-text);
}
.brand-main{
  font-size:19px;font-weight:700;letter-spacing:0.02em;
}
.brand-sub{
  font-size:11px;color:var(--c-text-3);letter-spacing:0.32em;margin-top:3px;
}
.brand:hover .brand-main{color:var(--c-glow);}
.nav-cta{
  display:inline-flex;align-items:center;
  padding:9px 20px;
  border-radius:var(--radius-btn);
  background:var(--c-glow);
  color:#04121A;
  font-size:14px;font-weight:600;
  box-shadow:0 0 0 1px rgba(61,245,200,0.4), 0 8px 22px rgba(61,245,200,0.18);
  transition:transform .18s ease, box-shadow .2s ease, background .2s ease;
}
.nav-cta:hover{background:#55F7CF;color:#04121A;transform:translateY(-1px);}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:10px;
  border:1px solid var(--c-line);
  background:var(--c-surface-2);
  position:relative;
  cursor:pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;top:50%;
  width:18px;height:1.6px;background:var(--c-text);
  transform:translate(-50%,-50%);
  transition:transform .2s ease, opacity .2s ease;
  content:"";
}
.nav-toggle span::before{transform:translate(-50%,-6px);}
.nav-toggle span::after{transform:translate(-50%,6px);}
.nav-toggle[aria-expanded="true"] span{background:var(--c-glow);}
.nav-toggle[aria-expanded="true"] span::before{transform:translate(-50%,0) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translate(-50%,0) rotate(-45deg);}

.nav-panel{
  display:none;
  position:fixed;
  top:72px;left:0;right:0;
  background:rgba(6,13,24,0.98);
  border-bottom:1px solid var(--c-line);
  padding:12px 0 22px;
  transform:translateY(-12px);
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease, transform .2s ease;
  z-index:89;
}
.nav-panel.open{opacity:1;transform:translateY(0);pointer-events:auto;}
.nav-panel a{
  display:block;
  line-height:48px;
  padding:0 24px;
  font-size:15px;
  border-bottom:1px solid var(--c-line);
  color:var(--c-text-2);
}
.nav-panel a.active{color:var(--c-glow);}
.nav-panel .btn{margin:18px 24px 0;width:calc(100% - 48px);}

/* ---------- 小号 Hero ---------- */
.hero-sm{
  position:relative;
  padding:150px 0 76px;
  background-image:url("/assets/images/backpic/back-3.webp");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.hero-sm::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(120deg, rgba(5,11,20,0.96) 0%, rgba(5,11,20,0.86) 46%, rgba(5,11,20,0.72) 100%);
}
.hero-sm::after{
  content:"";
  position:absolute;
  right:-160px;bottom:-220px;
  width:560px;height:560px;
  border-radius:50%;
  border:1px solid rgba(61,245,200,0.08);
  pointer-events:none;
}
.hero-sm .container{position:relative;z-index:2;}
.hero-sm h1{
  font-size:46px;
  max-width:840px;
  margin:16px 0 20px;
}
.hero-sm .lead{
  max-width:720px;
  color:var(--c-text-2);
  font-size:17px;
  line-height:1.8;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:34px;
  margin-top:42px;
  padding-top:26px;
  border-top:1px solid var(--c-line);
}
.hero-facts div{min-width:120px;}
.hero-facts .num{
  display:block;
  font-family:var(--font-mono);
  font-size:26px;
  color:var(--c-glow);
  letter-spacing:-0.5px;
}
.hero-facts .lbl{font-size:13px;color:var(--c-text-3);}

/* 页内导览条 */
.page-nav{
  position:sticky;
  top:72px;
  z-index:60;
  background:rgba(8,16,29,0.92);
  backdrop-filter:blur(10px);
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
}
.page-nav ul{
  display:flex;
  gap:28px;
  overflow-x:auto;
  scrollbar-width:none;
  padding:0;
}
.page-nav ul::-webkit-scrollbar{display:none;}
.page-nav a{
  display:block;
  padding:16px 0;
  font-size:14px;
  color:var(--c-text-2);
  border-bottom:2px solid transparent;
  white-space:nowrap;
}
.page-nav a:hover{color:var(--c-glow);border-bottom-color:var(--c-line-strong);}

/* ---------- 对照面板 ---------- */
.compare{
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  background:var(--c-bg-1);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.compare-head,
.compare-row{
  display:grid;
  grid-template-columns:1fr 1fr;
}
.compare-head{
  background:rgba(255,255,255,0.03);
  border-bottom:1px solid var(--c-line);
}
.compare-head > div{
  padding:20px 28px;
  font-size:14px;
  letter-spacing:0.06em;
  color:var(--c-text-3);
}
.compare-head > div + div{
  border-left:1px solid var(--c-line);
  color:var(--c-glow);
}
.compare-row{border-bottom:1px solid var(--c-line);}
.compare-row:last-child{border-bottom:0;}
.cr-cell{
  padding:24px 28px;
  font-size:15px;
  color:var(--c-text-2);
  line-height:1.8;
}
.cr-cell + .cr-cell{
  border-left:1px solid var(--c-line);
  background:rgba(61,245,200,0.028);
  color:var(--c-text);
}
.cr-cell strong{
  display:block;
  font-size:15px;
  color:var(--c-text);
  margin-bottom:6px;
  font-weight:600;
}
.cr-cell + .cr-cell strong{color:var(--c-glow);}
.cr-cell .mono{color:var(--c-text-2);}
.cr-cell + .cr-cell .mono{color:var(--c-glow);}
.compare-tip{
  margin-top:16px;
  font-size:13px;
  color:var(--c-text-3);
}

/* 结论条 */
.conclusion{
  margin-top:34px;
  position:relative;
  border:1px solid var(--c-line);
  border-radius:var(--radius-card);
  background:linear-gradient(180deg, rgba(46,107,255,0.10), rgba(10,21,38,0.9));
  padding:30px 34px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:26px;
  flex-wrap:wrap;
  box-shadow:var(--shadow-card);
}
.conclusion::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, var(--c-glow), transparent);
  opacity:.7;
}
.conclusion p{margin:0;color:var(--c-text-2);font-size:15px;max-width:640px;}
.conclusion strong{color:var(--c-text);}

/* ---------- 指标分组 ---------- */
.metrics-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:0 44px;
}
.metric-item{
  display:flex;
  gap:18px;
  padding:24px 0;
  border-bottom:1px solid var(--c-line);
}
.metric-item .idx{
  font-family:var(--font-mono);
  font-size:15px;
  color:var(--c-glow);
  padding-top:3px;
  flex:0 0 auto;
}
.metric-item h3{font-size:18px;margin-bottom:8px;}
.metric-item p{margin:0;color:var(--c-text-2);font-size:15px;}

/* ---------- 图文块 ---------- */
.split{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:52px;
  align-items:center;
}
.split.reverse{grid-template-columns:1fr 1.05fr;}
.figure{
  position:relative;
  border-radius:var(--radius-card);
  border:1px solid var(--c-line);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  transition:transform .35s ease;
}
.figure:hover img{transform:scale(1.03);}
.figure figcaption{
  padding:14px 18px;
  font-size:13px;
  color:var(--c-text-3);
  background:var(--c-bg-1);
  border-top:1px solid var(--c-line);
}
.check-list{margin-top:22px;}
.check-list li{
  position:relative;
  padding-left:24px;
  margin-bottom:12px;
  color:var(--c-text-2);
  font-size:15px;
}
.check-list li::before{
  content:"";
  position:absolute;left:0;top:10px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--c-glow);
  box-shadow:0 0 10px rgba(61,245,200,0.5);
}

/* ---------- FAQ ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:1fr 2fr;
  gap:52px;
  align-items:start;
}
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;
  min-height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 4px;
  background:none;
  border:0;
  color:var(--c-text);
  font-size:16.5px;
  font-weight:600;
  text-align:left;
  cursor:pointer;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-glow);}
.faq-q:focus-visible{outline:2px solid var(--c-glow);outline-offset:-2px;}
.faq-icon{
  flex:0 0 auto;
  width:26px;height:26px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--c-line);
  color:var(--c-text-2);
  font-size:16px;
  line-height:1;
  transition:transform .25s ease, color .2s ease, border-color .2s ease;
}
.faq-item.open .faq-icon{
  transform:rotate(45deg);
  color:var(--c-glow);
  border-color:var(--c-line-strong);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s ease;
}
.faq-a-inner{
  padding:0 4px 22px;
  color:var(--c-text-2);
  font-size:15px;
  line-height:1.85;
  opacity:0;
  transition:opacity .3s ease;
}
.faq-item.open .faq-a-inner{opacity:1;}

/* ---------- CTA / 表单 ---------- */
.cta-section{padding:0 0 96px;}
.cta-panel{
  position:relative;
  border-radius:22px;
  border:1px solid var(--c-line);
  background:linear-gradient(150deg, rgba(46,107,255,0.16), rgba(10,21,38,0.72) 48%, rgba(61,245,200,0.08));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  padding:52px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:52px;
  overflow:hidden;
}
.cta-panel::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg, transparent, var(--c-glow), transparent);
}
.cta-copy h2{font-size:30px;margin-bottom:16px;}
.cta-copy p{color:var(--c-text-2);font-size:15.5px;}
.cta-points{margin-top:24px;}
.cta-points li{
  position:relative;
  padding-left:22px;
  margin-bottom:10px;
  color:var(--c-text-2);
  font-size:15px;
}
.cta-points li::before{
  content:"";
  position:absolute;left:0;top:9px;
  width:6px;height:6px;border-radius:50%;
  background:var(--c-glow);
}
.form-grid{display:grid;gap:18px;}
.field label{
  display:block;
  font-size:13.5px;
  color:var(--c-text-2);
  margin-bottom:8px;
}
.field input,
.field select{
  width:100%;
  padding:13px 15px;
  border-radius:var(--radius-input);
  border:1px solid var(--c-line);
  background:rgba(255,255,255,0.04);
  color:var(--c-text);
  font-size:15px;
  transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.field input::placeholder{color:var(--c-text-3);}
.field input:focus,
.field select:focus{
  outline:none;
  border-color:var(--c-glow);
  box-shadow:0 0 0 3px rgba(61,245,200,0.16);
  background:rgba(255,255,255,0.06);
}
.field select option{background:#0A1526;color:var(--c-text);}
.field.error input,
.field.error select{border-color:var(--c-error);}
.field .err-msg{
  display:none;
  margin-top:7px;
  font-size:12.5px;
  color:var(--c-error);
}
.field.error .err-msg{display:block;}
.form-note{
  margin-top:14px;
  font-size:12.5px;
  color:var(--c-text-3);
}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--c-line);
  background:var(--c-bg-1);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand{align-items:flex-start;}
.footer-brand p{
  margin-top:16px;
  color:var(--c-text-3);
  font-size:14px;
  max-width:320px;
  line-height:1.8;
}
.footer-col h4{
  font-size:14px;
  color:var(--c-text);
  margin-bottom:16px;
  letter-spacing:0.04em;
}
.footer-col li{margin-bottom:10px;font-size:14px;color:var(--c-text-3);}
.footer-col a{color:var(--c-text-2);font-size:14px;}
.footer-contact .mono{color:var(--c-text-2);}
.footer-bottom{
  border-top:1px solid var(--c-line);
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--c-text-3);
}
.footer-bottom .lang span{color:var(--c-text-2);}

/* ---------- 空态 / 加载 / 错误 ---------- */
.skeleton{
  border-radius:12px;
  background:linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.10) 37%, rgba(255,255,255,0.05) 63%);
  background-size:400% 100%;
  animation:skeleton-breathe 1.6s ease-in-out infinite;
  height:14px;
}
@keyframes skeleton-breathe{
  0%{background-position:100% 50%;}
  100%{background-position:0 50%;}
}
.state-box{
  border:1px dashed var(--c-line);
  border-radius:var(--radius-card);
  padding:38px 24px;
  text-align:center;
  color:var(--c-text-3);
  font-size:14.5px;
}
.state-box .state-icon{
  display:block;
  font-family:var(--font-mono);
  font-size:22px;
  color:var(--c-glow);
  margin-bottom:10px;
}
.state-box a{color:var(--c-glow);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1040px;}
  .hero-sm h1{font-size:42px;}
}
@media (max-width:1023px){
  :root{--space-section:64px;}
  .nav-side.left,.nav-side.right .nav-link{display:none;}
  .nav-side.right{gap:12px;}
  .nav-toggle{display:block;}
  .nav-panel{display:block;}
  .desktop-only{display:none !important;}
  .hero-sm{padding:126px 0 60px;}
  .hero-sm h1{font-size:36px;}
  .split,.split.reverse{grid-template-columns:1fr;gap:34px;}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .cta-panel{grid-template-columns:1fr;gap:36px;padding:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .metrics-grid{grid-template-columns:1fr;}
}
@media (max-width:767px){
  :root{--space-section:48px;}
  .container{padding:0 16px;}
  body{font-size:16px;}
  .hero-sm{padding:112px 0 48px;min-height:420px;}
  .hero-sm h1{font-size:31px;}
  .hero-sm .lead{font-size:16px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;}
  .hero-facts{gap:22px;}
  .hero-facts .num{font-size:22px;}
  .page-nav{top:72px;}
  .page-nav ul{gap:20px;}
  .compare-head{display:none;}
  .compare-row{grid-template-columns:1fr;}
  .cr-cell{padding:20px;}
  .cr-cell + .cr-cell{border-left:0;border-top:1px solid var(--c-line);}
  .conclusion{padding:24px;flex-direction:column;align-items:flex-start;}
  .conclusion .btn{width:100%;}
  .cta-panel{padding:28px 22px;border-radius:18px;}
  .cta-copy h2{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  h2{font-size:24px;}
}