/* roulang page: index */
:root{
  --bg:#050A16;
  --panel:#0B1424;
  --line:#16233A;
  --blue:#2F6BFF;
  --cyan:#16E0C8;
  --amber:#FFB020;
  --text:#E8EEF9;
  --muted:#94A3BF;
  --dim:#5F7189;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 24px 48px -28px rgba(0,0,0,.9);
  --shadow-lg:0 32px 64px -30px rgba(0,0,0,.95);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:10px;font-size:15px;font-weight:600;line-height:1;white-space:nowrap;transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,border-color .18s ease,background-color .18s ease}
.btn-primary{background:linear-gradient(135deg,#2F6BFF 0%,#16E0C8 100%);color:#04121F}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 0 0 1px rgba(22,224,200,.5),0 10px 32px -8px rgba(47,107,255,.55)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.18);color:var(--text)}
.btn-ghost:hover{border-color:var(--cyan);box-shadow:0 0 0 1px rgba(22,224,200,.22)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:8px}
.btn-block{width:100%}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:14px;font-weight:500}
.link-arrow::after{content:"→";transition:transform .2s ease}
.link-arrow:hover::after{transform:translateX(4px)}
.badge{display:inline-block;font-size:12px;letter-spacing:.06em;padding:3px 10px;border-radius:6px;background:rgba(255,176,32,.12);color:var(--amber);border:1px solid rgba(255,176,32,.28);line-height:1.6}
.badge-cyan{background:rgba(22,224,200,.1);color:var(--cyan);border-color:rgba(22,224,200,.3)}

/* header */
.site-header{position:sticky;top:0;z-index:60;border-bottom:1px solid transparent;background:linear-gradient(180deg,rgba(5,10,22,.94),rgba(5,10,22,.5));transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease}
.site-header.is-scrolled{background:rgba(5,10,22,.84);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
.nav-bar{display:flex;align-items:center;gap:22px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,rgba(47,107,255,.3),rgba(22,224,200,.18));border:1px solid rgba(22,224,200,.35);display:grid;place-items:center;flex:none}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.01em;line-height:1;white-space:nowrap}
.brand-name em{font-style:normal;color:var(--cyan)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{position:relative;padding:8px 11px;font-size:14.5px;color:var(--muted);border-radius:8px;transition:color .2s ease,background-color .2s ease}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.045)}
.nav-links a.is-active{color:var(--text)}
.nav-links a.is-active::after{content:"";position:absolute;left:11px;right:11px;bottom:-3px;height:2px;border-radius:2px;background:var(--cyan);box-shadow:0 0 10px rgba(22,224,200,.8)}
.nav-actions{display:flex;align-items:center;gap:16px;flex:none}
.nav-tel{font-size:12.5px;color:var(--dim);line-height:1.4;text-align:right;font-variant-numeric:tabular-nums}
.nav-tel b{display:block;color:var(--cyan);font-size:13.5px;font-weight:600;letter-spacing:.02em}
.hamburger{display:none;width:40px;height:40px;border-radius:9px;border:1px solid rgba(255,255,255,.12);align-items:center;justify-content:center;margin-left:auto}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);position:relative;border-radius:2px}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}

/* drawer */
.drawer-overlay{position:fixed;inset:0;background:rgba(3,7,15,.72);backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .25s ease;z-index:80}
.drawer{position:fixed;top:0;right:0;height:100%;width:82vw;max-width:360px;background:#070E1C;border-left:1px solid var(--line);transform:translateX(100%);transition:transform .3s ease;z-index:90;padding:20px;overflow-y:auto;display:flex;flex-direction:column}
body.drawer-open .drawer{transform:translateX(0)}
body.drawer-open .drawer-overlay{opacity:1;pointer-events:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:14px}
.drawer-close{width:36px;height:36px;border-radius:9px;border:1px solid rgba(255,255,255,.12);display:grid;place-items:center;font-size:18px;color:var(--muted)}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer nav a{display:flex;align-items:center;height:44px;padding:0 12px;border-radius:8px;font-size:15px;color:var(--muted)}
.drawer nav a:hover{background:rgba(255,255,255,.05);color:var(--text)}
.drawer nav a.is-active{color:var(--cyan);background:rgba(22,224,200,.09)}
.drawer-foot{margin-top:auto;padding-top:22px}
.drawer-foot .btn{width:100%}
.drawer-foot p{font-size:12.5px;color:var(--dim);margin-top:14px;text-align:center}

/* hero */
.hero{position:relative;overflow:hidden;padding:68px 0 96px;background:radial-gradient(120% 95% at 12% 0%,#0B1A3A 0%,#050A16 62%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(47,107,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(47,107,255,.07) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(82% 72% at 50% 18%,#000 0%,transparent 78%);mask-image:radial-gradient(82% 72% at 50% 18%,#000 0%,transparent 78%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.08em;color:var(--cyan);border:1px solid rgba(22,224,200,.32);background:rgba(22,224,200,.07);padding:6px 14px;border-radius:999px;line-height:1.5}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);display:inline-block;font-style:normal}
.hero h1{font-size:clamp(30px,4.4vw,52px);line-height:1.15;letter-spacing:-.01em;margin:22px 0 18px}
.hero-sub{color:var(--muted);font-size:16.5px;max-width:54ch;line-height:1.85}
.hero-cta{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-shot{position:relative;border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.09);box-shadow:var(--shadow-lg)}
.hero-shot img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-shot::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,22,.14) 0%,rgba(5,10,22,.62) 68%,rgba(5,10,22,.86) 100%)}
.hero-stats{position:relative;margin:-46px 16px 0;display:grid;grid-template-columns:repeat(3,1fr);border-radius:14px;border:1px solid rgba(255,255,255,.1);background:rgba(11,20,36,.8);backdrop-filter:blur(12px);box-shadow:var(--shadow);overflow:hidden}
.hero-stat{padding:16px 10px;text-align:center;border-right:1px solid rgba(255,255,255,.07)}
.hero-stat:last-child{border-right:0}
.hero-stat b{display:block;font-size:26px;line-height:1.1;color:var(--cyan);font-weight:700;font-family:Inter,system-ui,sans-serif}
.hero-stat b i{font-style:normal;font-size:12.5px;color:var(--muted);margin-left:3px;font-weight:500}
.hero-stat span{display:block;font-size:12px;color:var(--muted);letter-spacing:.06em;margin-top:8px}

/* sections */
.section{padding:96px 0}
.section-tint{background:linear-gradient(180deg,#050A16 0%,#08111F 42%,#050A16 100%)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.28}
.section-head p{color:var(--muted);font-size:15px;margin-top:10px;max-width:62ch}
.card{background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);box-shadow:var(--shadow);backdrop-filter:blur(12px);transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out}
.card:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35);box-shadow:var(--shadow-lg)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{position:relative;padding:26px;background:rgba(11,20,36,.75);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .2s ease-out,border-color .2s ease-out}
.step:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35)}
.step:not(:last-child)::after{content:"";position:absolute;top:42px;right:-24px;width:24px;border-top:2px dashed rgba(22,224,200,.36)}
.step-num{display:inline-block;font-family:Inter,system-ui,sans-serif;font-size:13px;letter-spacing:.14em;font-weight:700;color:var(--cyan);border:1px solid rgba(22,224,200,.3);background:rgba(22,224,200,.08);border-radius:6px;padding:2px 8px;line-height:1.6}
.step h3{font-size:19px;margin:16px 0 10px;font-weight:600}
.step p{color:var(--muted);font-size:14.5px;line-height:1.8}
.step .link-arrow{margin-top:16px;font-size:13.5px}

/* cases */
.case-big-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}
.case-big{display:grid;grid-template-columns:44% 56%;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s ease-out,border-color .2s ease-out}
.case-big:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35)}
.case-big .case-media{position:relative;min-height:250px}
.case-big .case-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.case-big .case-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,22,.1),rgba(5,10,22,.6))}
.case-big .case-body{padding:24px}
.case-body h3{font-size:18px;line-height:1.5;margin:12px 0 10px;font-weight:600}
.case-body .case-desc{color:var(--muted);font-size:14px;line-height:1.8}
.result-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.result{font-size:12.5px;color:var(--muted);background:rgba(47,107,255,.1);border:1px solid rgba(47,107,255,.28);border-radius:6px;padding:4px 10px;line-height:1.6}
.result b{color:var(--cyan);font-weight:600}
.case-sm-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-sm{overflow:hidden;display:flex;flex-direction:column}
.case-sm .case-media{position:relative}
.case-sm .case-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.case-sm .case-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,22,.05),rgba(5,10,22,.5))}
.case-sm .case-body{padding:20px}
.case-sm h3{font-size:16px;line-height:1.55;margin:10px 0 8px;font-weight:600}

/* faq */
.faq-list{display:grid;gap:12px}
.faq-item{border:1px solid rgba(255,255,255,.08);border-radius:12px;background:rgba(255,255,255,.035);overflow:hidden;transition:border-color .2s ease,background-color .2s ease}
.faq-item:hover{border-color:rgba(255,255,255,.16)}
.faq-item.is-open{border-color:rgba(22,224,200,.35);background:rgba(22,224,200,.04)}
.faq-q{width:100%;display:flex;align-items:stretch;gap:16px;padding:0;text-align:left;font-size:16px;font-weight:600;color:var(--text)}
.faq-q .marker{width:3px;flex:none;border-radius:0 3px 3px 0;background:var(--line);transition:background .2s ease,box-shadow .2s ease}
.faq-item.is-open .faq-q .marker{background:var(--cyan);box-shadow:0 0 12px rgba(22,224,200,.65)}
.faq-q .qtext{flex:1;padding:18px 0 18px 4px;line-height:1.6}
.faq-icon{position:relative;width:16px;height:16px;align-self:center;margin-right:22px;flex:none}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--muted);border-radius:2px;transform:translate(-50%,-50%);transition:transform .25s ease,opacity .25s ease,background .25s ease}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-item.is-open .faq-icon::before{background:var(--cyan)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a p{padding:0 22px 20px 41px;color:var(--muted);font-size:15px;line-height:1.85;max-width:64ch}

/* news */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;padding:22px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out}
.news-card:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35);box-shadow:var(--shadow-lg)}
.news-card h3{font-size:17px;line-height:1.55;font-weight:600;margin:12px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover h3{color:var(--cyan)}
.news-card p{color:var(--muted);font-size:14px;line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid rgba(255,255,255,.07);margin-top:18px}
.news-foot time{font-size:12.5px;color:var(--dim);font-variant-numeric:tabular-nums}
.news-foot .link-arrow{font-size:13px}
.empty-state{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:48px 24px;border:1px dashed rgba(255,255,255,.14);border-radius:var(--radius);background:rgba(255,255,255,.02)}
.empty-state svg{width:44px;height:44px;color:var(--dim)}
.empty-state p{color:var(--muted);font-size:14.5px}

/* cta + form */
.cta-band{position:relative;overflow:hidden;padding:84px 0;background:radial-gradient(90% 130% at 82% 0%,#0B1A3A 0%,#050A16 62%);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(47,107,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(47,107,255,.07) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(70% 80% at 70% 30%,#000 0%,transparent 80%);mask-image:radial-gradient(70% 80% at 70% 30%,#000 0%,transparent 80%)}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.cta-grid h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;margin-bottom:16px}
.cta-grid .cta-lead{color:var(--muted);font-size:15px;max-width:46ch}
.assure-list{margin-top:26px;display:grid;gap:12px}
.assure-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--text);line-height:1.7}
.assure-list li::before{content:"";flex:none;width:18px;height:18px;margin-top:5px;border-radius:50%;background:rgba(22,224,200,.12);border:1px solid rgba(22,224,200,.42);box-shadow:inset 0 0 0 3px rgba(5,10,22,1)}
.form-card{padding:26px;border-radius:var(--radius);background:rgba(11,20,36,.88);border:1px solid rgba(255,255,255,.1);box-shadow:var(--shadow-lg);backdrop-filter:blur(12px)}
.form-card h3{font-size:18px;margin-bottom:18px;font-weight:600}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.field label em{font-style:normal;color:var(--amber);margin-left:2px}
.field input,.field textarea{width:100%;height:48px;padding:0 14px;border-radius:10px;background:#0A1526;border:1px solid rgba(255,255,255,.1);color:var(--text);font-size:15px;font-family:inherit;transition:border-color .2s ease,box-shadow .2s ease;appearance:none;-webkit-appearance:none}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.75}
.field input::placeholder,.field textarea::placeholder{color:var(--dim)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(22,224,200,.16)}
.field.has-error input,.field.has-error textarea{border-color:var(--amber);box-shadow:0 0 0 3px rgba(255,176,32,.12)}
.field-error{display:none;font-size:12px;color:var(--amber);margin-top:6px;line-height:1.6}
.field.has-error .field-error{display:block}
.form-privacy{font-size:12px;color:var(--dim);line-height:1.8;margin-top:12px}
.form-tip{font-size:13px;margin-top:12px;display:none;line-height:1.7}
.form-tip.is-show{display:block}
.form-tip-ok{color:var(--cyan)}
.form-tip-warn{color:var(--amber)}

/* footer */
.site-footer{border-top:1px solid var(--line);background:#040812;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:44px}
.footer-title{font-size:12.5px;letter-spacing:.1em;color:var(--dim);margin:0 0 16px;font-weight:600}
.footer-about p{font-size:13.5px;color:var(--muted);line-height:1.9;margin-top:14px;max-width:34ch}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--muted);transition:color .2s ease}
.footer-links a:hover{color:var(--cyan)}
.footer-links span{font-size:14px;color:var(--muted);line-height:1.7}
.footer-links strong{color:var(--text);font-weight:600;font-variant-numeric:tabular-nums}
.footer-bottom{border-top:1px solid var(--line);padding:20px 0 26px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--dim);line-height:1.8}

@media (max-width:1100px){
  .nav-tel{display:none}
}
@media (max-width:1023px){
  .nav-links,.nav-actions{display:none}
  .hamburger{display:flex}
  .hero{padding:48px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:-1;max-width:640px;margin:0 auto;width:100%}
  .hero-shot img{aspect-ratio:16/9}
  .hero-stats{margin:-38px 12px 0}
  .section{padding:72px 0}
  .steps{grid-template-columns:1fr;gap:18px}
  .step:not(:last-child)::after{display:none}
  .case-big-grid{grid-template-columns:1fr}
  .case-sm-grid{grid-template-columns:1fr}
  .case-big{grid-template-columns:1fr}
  .case-big .case-media{min-height:200px}
  .case-big .case-media img{position:static;aspect-ratio:16/9;height:auto}
  .news-grid{grid-template-columns:1fr}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .card,.form-card,.hero-stats{backdrop-filter:none}
}
@media (max-width:639px){
  .container{padding:0 18px}
  .brand-name{font-size:15.5px}
  .hero h1{margin:18px 0 14px}
  .hero-cta{gap:10px}
  .hero-cta .btn{width:100%}
  .hero-stat b{font-size:21px}
  .hero-stat span{font-size:11px}
  .hero-stat{padding:14px 6px}
  .hero-stats{margin:-30px 8px 0}
  .section{padding:56px 0}
  .cta-band{padding:56px 0}
  .section-head{margin-bottom:26px}
  .faq-q .qtext{font-size:15px;padding-right:4px}
  .faq-a p{padding:0 18px 18px 22px;font-size:14.5px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
  .card:hover,.step:hover,.news-card:hover,.case-big:hover{transform:none}
}

/* roulang page: article */
:root{
  --bg:#050A16;
  --panel:#0B1424;
  --line:#16233A;
  --blue:#2F6BFF;
  --cyan:#16E0C8;
  --amber:#FFB020;
  --text:#E8EEF9;
  --text-2:#94A3BF;
  --text-3:#5F7189;
  --card-bg:rgba(255,255,255,.045);
  --card-line:rgba(255,255,255,.08);
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 24px 48px -28px rgba(0,0,0,.9);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
button{font-family:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:60;border-bottom:1px solid transparent;transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;}
.site-header.is-scrolled{background:rgba(5,10,22,.84);backdrop-filter:blur(14px);border-bottom-color:var(--line);}
.header-inner{display:flex;align-items:center;gap:28px;height:76px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:rgba(47,107,255,.16);border:1px solid rgba(47,107,255,.38);}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--text);white-space:nowrap;}
.brand-name em{font-style:normal;color:var(--cyan);}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-links a{position:relative;padding:10px 12px;font-size:14.5px;line-height:1.2;color:var(--text-2);border-radius:8px;transition:color .18s ease,background .18s ease;white-space:nowrap;}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav-links a.is-active{color:var(--text);}
.nav-links a.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;background:var(--cyan);box-shadow:0 0 12px rgba(22,224,200,.7);}
.header-actions{display:flex;align-items:center;gap:16px;flex:none;}
.header-phone{font-size:13px;color:var(--text-3);white-space:nowrap;transition:color .18s ease;}
.header-phone strong{color:var(--text-2);font-weight:600;}
.header-phone:hover{color:var(--cyan);}
.header-phone:hover strong{color:var(--cyan);}
.burger{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--card-line);background:transparent;color:var(--text);cursor:pointer;align-items:center;justify-content:center;}
.burger:hover{border-color:rgba(22,224,200,.5);}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;cursor:pointer;transition:transform .18s ease,box-shadow .2s ease,filter .2s ease,border-color .2s ease,color .2s ease,background .2s ease;}
.btn-primary{background:linear-gradient(135deg,#2F6BFF 0%,#16E0C8 100%);color:#04121F;}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 0 0 1px rgba(22,224,200,.5),0 10px 32px -8px rgba(47,107,255,.55);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--text);}
.btn-ghost:hover{border-color:rgba(22,224,200,.55);color:#fff;}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn:focus-visible,.nav-links a:focus-visible,.footer-links a:focus-visible,.crumbs a:focus-visible,.toc-list a:focus-visible,.post-card:focus-visible,.burger:focus-visible,.drawer a:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;}

/* ===== Drawer ===== */
.drawer-mask{position:fixed;inset:0;z-index:70;background:rgba(3,7,15,.72);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;}
.drawer{position:fixed;top:0;right:0;z-index:80;height:100%;width:82vw;max-width:340px;background:var(--panel);border-left:1px solid var(--line);transform:translateX(102%);transition:transform .28s ease;display:flex;flex-direction:column;padding:20px;overflow-y:auto;}
body.drawer-open .drawer{transform:translateX(0);}
body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
body.drawer-open{overflow:hidden;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{width:38px;height:38px;border-radius:9px;border:1px solid var(--card-line);background:transparent;color:var(--text-2);cursor:pointer;font-size:18px;line-height:1;}
.drawer-close:hover{color:var(--text);border-color:rgba(22,224,200,.5);}
.drawer nav{display:flex;flex-direction:column;padding:10px 0;gap:2px;}
.drawer nav a{min-height:44px;display:flex;align-items:center;padding:0 12px;border-radius:9px;color:var(--text-2);font-size:15px;}
.drawer nav a:hover,.drawer nav a.is-active{background:rgba(255,255,255,.06);color:var(--text);}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:12px;}
.drawer-foot .btn{width:100%;}
.drawer-foot p{font-size:13px;color:var(--text-3);}

/* ===== Layout / breadcrumb ===== */
.page-wrap{padding:28px 0 88px;}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);}
.crumbs a{color:var(--text-2);transition:color .18s ease;}
.crumbs a:hover{color:var(--cyan);}
.crumbs .sep{color:#31405c;}
.crumbs .current{max-width:min(340px,52vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text-2);}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:52px;margin-top:30px;align-items:start;}
.article-col{min-width:0;}

/* ===== Article head ===== */
.tag-badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:6px;background:rgba(22,224,200,.10);border:1px solid rgba(22,224,200,.30);color:var(--cyan);font-size:12px;letter-spacing:.06em;font-weight:600;}
.article-title{font-size:clamp(26px,3.4vw,40px);line-height:1.28;font-weight:700;letter-spacing:-.01em;color:var(--text);margin:16px 0 18px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;font-size:13px;color:var(--text-3);padding-bottom:20px;border-bottom:1px solid var(--line);}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#31405c;}

/* ===== TOC mobile ===== */
.toc-mobile{display:none;margin:22px 0 4px;border:1px solid var(--card-line);border-radius:var(--radius);background:var(--card-bg);padding:0 18px;}
.toc-mobile>summary{list-style:none;cursor:pointer;min-height:48px;display:flex;align-items:center;justify-content:space-between;font-size:14px;font-weight:600;color:var(--text);}
.toc-mobile>summary::-webkit-details-marker{display:none;}
.toc-mobile>summary::after{content:"+";color:var(--cyan);font-size:18px;line-height:1;}
.toc-mobile[open]>summary::after{content:"−";}
.toc-mobile .toc-list{padding:4px 0 14px;}

/* ===== Article body ===== */
.article-body{max-width:760px;margin-top:26px;font-size:16px;line-height:1.9;color:#D3DEED;overflow-wrap:break-word;}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 18px;}
.article-body h2{position:relative;font-size:clamp(20px,2.2vw,24px);font-weight:700;line-height:1.45;color:var(--text);margin:40px 0 16px;padding-left:14px;}
.article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:2px;background:var(--cyan);}
.article-body h3{font-size:17px;font-weight:600;line-height:1.6;color:var(--text);margin:28px 0 12px;}
.article-body h4{font-size:16px;font-weight:600;color:var(--text);margin:22px 0 10px;}
.article-body a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:#5cf3e0;}
.article-body strong{color:var(--text);font-weight:600;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;}
.article-body ul{list-style:none;padding-left:20px;}
.article-body ul>li{position:relative;padding-left:6px;margin-bottom:9px;}
.article-body ul>li::before{content:"";position:absolute;left:-14px;top:.82em;width:6px;height:6px;border-radius:2px;background:var(--cyan);}
.article-body ol>li{margin-bottom:9px;padding-left:4px;}
.article-body ol>li::marker{color:var(--cyan);font-weight:600;}
.article-body blockquote{margin:24px 0;padding:16px 22px;border-left:3px solid var(--cyan);border-radius:0 12px 12px 0;background:rgba(255,255,255,.045);color:var(--text-2);}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:14px;line-height:1.7;margin:22px 0;border-radius:12px;border:1px solid var(--line);}
.article-body thead{background:rgba(255,255,255,.05);}
.article-body th,.article-body td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap;}
.article-body th{color:var(--text);font-weight:600;}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.025);}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body img{max-width:100%;height:auto;border-radius:12px;margin:26px 0 8px;}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;line-height:1.7;}
.article-body code{padding:2px 6px;border-radius:5px;background:rgba(47,107,255,.14);color:#9fc0ff;font-size:14px;}
.article-body pre{overflow-x:auto;padding:16px 18px;border-radius:12px;background:#0A1526;border:1px solid var(--line);margin:22px 0;}
.article-body pre code{background:none;padding:0;color:#C8D8F2;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

/* ===== Empty state ===== */
.empty-box{max-width:760px;padding:44px 28px;border:1px dashed rgba(255,255,255,.16);border-radius:var(--radius);background:var(--card-bg);text-align:center;}
.empty-icon{width:56px;height:56px;margin:0 auto 16px;border-radius:14px;display:grid;place-items:center;background:rgba(47,107,255,.14);border:1px solid rgba(47,107,255,.32);}
.empty-title{font-size:18px;font-weight:600;color:var(--text);margin-bottom:8px;}
.empty-text{font-size:14px;color:var(--text-2);margin-bottom:22px;}

/* ===== Side column ===== */
.side-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{background:var(--card-bg);border:1px solid var(--card-line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);backdrop-filter:blur(12px);}
.side-title{font-size:12px;letter-spacing:.1em;color:var(--text-3);margin-bottom:14px;font-weight:600;}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{display:block;padding:8px 10px;font-size:14px;line-height:1.55;color:var(--text-2);border-left:2px solid transparent;border-radius:0 8px 8px 0;transition:color .18s ease,background .18s ease,border-color .18s ease;}
.toc-list a:hover{color:var(--text);background:rgba(255,255,255,.045);border-left-color:rgba(22,224,200,.45);}
.toc-list a.is-active{color:var(--cyan);background:rgba(22,224,200,.08);border-left-color:var(--cyan);}
.toc-empty{font-size:13px;line-height:1.7;color:var(--text-3);padding:6px 2px;}
.reco-list{display:flex;flex-direction:column;}
.reco-item{display:flex;gap:12px;padding:12px 0;border-top:1px solid var(--line);}
.reco-item:first-child{border-top:0;padding-top:2px;}
.reco-item img{width:66px;height:50px;border-radius:8px;object-fit:cover;flex:none;background:#0A1526;}
.reco-item .reco-t{font-size:14px;line-height:1.55;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .18s ease;}
.reco-item .reco-s{font-size:12px;color:var(--text-3);margin-top:4px;}
.reco-item:hover .reco-t{color:var(--cyan);}

/* ===== Post nav / back ===== */
.post-nav{max-width:760px;display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:52px;}
.post-nav-card{display:flex;flex-direction:column;gap:8px;padding:20px;border-radius:var(--radius);background:var(--card-bg);border:1px solid var(--card-line);box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;}
.post-nav-card:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35);box-shadow:0 28px 52px -26px rgba(0,0,0,.95);}
.post-nav-label{font-size:12px;letter-spacing:.08em;color:var(--text-3);}
.post-nav-title{font-size:15px;font-weight:600;color:var(--text);line-height:1.55;}
.post-nav-card:hover .post-nav-title{color:var(--cyan);}
.back-row{max-width:760px;margin-top:24px;display:flex;flex-wrap:wrap;gap:12px;}

/* ===== Related ===== */
.related{margin-top:76px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:26px;}
.section-title{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--text);line-height:1.4;}
.section-sub{font-size:14px;color:var(--text-2);margin-top:6px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--text-2);transition:color .18s ease;}
.link-arrow i{font-style:normal;transition:transform .2s ease;}
.link-arrow:hover{color:var(--cyan);}
.link-arrow:hover i{transform:translateX(4px);}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.post-card{display:flex;flex-direction:column;border-radius:var(--radius);overflow:hidden;background:var(--card-bg);border:1px solid var(--card-line);box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;height:100%;}
.post-card:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35);box-shadow:0 28px 52px -26px rgba(0,0,0,.95);}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0A1526;}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,22,0) 40%,rgba(5,10,22,.72) 100%);}
.post-badge{position:absolute;left:12px;top:12px;z-index:2;height:24px;display:inline-flex;align-items:center;padding:0 9px;border-radius:6px;background:rgba(5,10,22,.78);border:1px solid rgba(22,224,200,.35);color:var(--cyan);font-size:12px;letter-spacing:.04em;}
.post-body{display:flex;flex-direction:column;gap:10px;padding:18px 20px 20px;flex:1;}
.post-title{font-size:16px;font-weight:600;line-height:1.55;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card:hover .post-title{color:var(--cyan);}
.post-desc{font-size:13.5px;line-height:1.75;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3);}
.post-more{display:inline-flex;align-items:center;gap:5px;color:var(--text-2);transition:color .18s ease;}
.post-more i{font-style:normal;transition:transform .2s ease;}
.post-card:hover .post-more{color:var(--cyan);}
.post-card:hover .post-more i{transform:translateX(4px);}

/* ===== Footer ===== */
.site-footer{border-top:1px solid var(--line);padding:64px 0 28px;background:#050A16;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;}
.footer-about p{font-size:14px;line-height:1.85;color:var(--text-2);margin-top:16px;max-width:34ch;}
.footer-title{font-size:12px;letter-spacing:.1em;color:var(--text-3);font-weight:600;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--text-2);}
.footer-links a{color:var(--text-2);transition:color .18s ease;}
.footer-links a:hover{color:var(--cyan);}
.footer-links strong{color:var(--text);font-weight:600;}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;align-items:center;margin-top:44px;padding-top:20px;border-top:1px solid var(--line);font-size:12px;color:var(--text-3);}

/* ===== Responsive ===== */
@media (max-width:1100px){
  .nav-links a{padding:10px 9px;font-size:14px;}
  .header-inner{gap:18px;}
  .article-layout{gap:36px;grid-template-columns:minmax(0,1fr) 272px;}
}
@media (max-width:1023px){
  .nav-links,.header-actions .btn,.header-phone{display:none;}
  .burger{display:inline-flex;}
  .header-inner{height:68px;}
  .nav-links{margin-left:0;}
  .article-layout{grid-template-columns:1fr;gap:0;}
  .side-col{display:none;}
  .toc-mobile{display:block;}
  .page-wrap{padding:22px 0 68px;}
  .related{margin-top:60px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .article-title{margin:14px 0 16px;}
  .post-nav{grid-template-columns:1fr;}
  .article-body{font-size:15.5px;line-height:1.88;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:519px){
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .btn{width:100%;}
  .post-nav-card .btn{width:auto;}
  .article-meta{gap:6px 14px;}
  .related{margin-top:48px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .crumbs .current{max-width:60vw;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* roulang page: category1 */
:root{
  --bg:#050A16;
  --panel:#0B1424;
  --panel-2:#0A1526;
  --line:#16233A;
  --primary:#2F6BFF;
  --cyan:#16E0C8;
  --amber:#FFB020;
  --text:#E8EEF9;
  --text-2:#94A3BF;
  --text-3:#5F7189;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --shadow-card:0 24px 48px -28px rgba(0,0,0,.9);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
::selection{background:rgba(22,224,200,.28);color:#fff}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(5,10,22,.55);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(5,10,22,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:76px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;display:grid;place-items:center;border-radius:11px;
  background:linear-gradient(135deg,rgba(47,107,255,.26),rgba(22,224,200,.18));
  border:1px solid rgba(22,224,200,.35);
}
.brand-name{font-size:18px;font-weight:700;letter-spacing:.02em;color:var(--text);white-space:nowrap}
.brand-name em{font-style:normal;color:var(--cyan)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  border-radius:999px;color:var(--text-2);font-size:15px;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-links a.is-active{color:var(--text)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 12px rgba(22,224,200,.7);
}
.header-actions{display:flex;align-items:center;gap:16px;flex-shrink:0}
.header-tel{font-size:14px;color:var(--text-2);letter-spacing:.02em;transition:color .2s}
.header-tel:hover{color:var(--cyan)}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);
  flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .2s}
.nav-toggle:hover{border-color:rgba(22,224,200,.45)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,filter .2s ease,color .2s;
}
.btn-primary{
  background:linear-gradient(135deg,#2F6BFF 0%,#16E0C8 100%);
  color:#04121F;
  box-shadow:0 10px 30px -14px rgba(47,107,255,.7);
}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 0 0 1px rgba(22,224,200,.5),0 10px 32px -8px rgba(47,107,255,.55)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--text)}
.btn-ghost:hover{border-color:var(--cyan);color:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:14px;font-weight:600}
.link-arrow span.arw{transition:transform .2s ease}
.link-arrow:hover span.arw{transform:translateX(4px)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:64px 0 88px;
  background:radial-gradient(900px 520px at 78% 4%, #0B1A3A 0%, #050A16 68%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(47,107,255,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(47,107,255,.07) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(620px 420px at 60% 20%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(620px 420px at 60% 20%, #000 0%, transparent 78%);
}
.hero .container{position:relative;z-index:1}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:24px}
.crumbs a{color:var(--text-2);transition:color .2s}
.crumbs a:hover{color:var(--cyan)}
.crumbs .sep{color:var(--text-3);opacity:.7}
.crumbs .cur{color:var(--text)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;margin-bottom:20px;
  border-radius:6px;border:1px solid rgba(255,176,32,.4);background:rgba(255,176,32,.1);
  color:var(--amber);font-size:12px;letter-spacing:.08em;
}
.hero h1{font-size:clamp(30px,4.4vw,52px);line-height:1.15;letter-spacing:-.01em;margin-bottom:18px}
.hero h1 .hl{color:var(--cyan)}
.hero-lead{font-size:17px;line-height:1.85;color:var(--text-2);max-width:56ch;margin-bottom:28px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow-card)}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,22,.12) 0%,rgba(5,10,22,.55) 58%,rgba(5,10,22,.92) 100%);
}
.hero-media .media-cap{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
  font-size:13px;color:var(--text-2);line-height:1.7;
}
.hero-media .media-cap strong{display:block;color:var(--text);font-size:14px;margin-bottom:2px}
.stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:22px;
  border-radius:var(--r-md);overflow:hidden;
  border:1px solid rgba(255,255,255,.09);
  background:rgba(255,255,255,.045);
  backdrop-filter:blur(12px);
}
.stat{padding:16px 18px;background:rgba(11,20,36,.55)}
.stat-value{font-size:26px;font-weight:700;color:var(--cyan);line-height:1.2;font-variant-numeric:tabular-nums}
.stat-value small{font-size:13px;font-weight:600;color:var(--text-2);margin-left:3px}
.stat-label{font-size:12px;letter-spacing:.08em;color:var(--text-2);margin-top:2px}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section.alt{background:linear-gradient(180deg,#050A16 0%,#08111F 40%,#050A16 100%)}
.section-head{max-width:760px;margin-bottom:36px}
.section-kicker{font-size:12px;letter-spacing:.18em;color:var(--cyan);margin-bottom:12px;text-transform:uppercase}
.section-title{font-size:clamp(24px,2.6vw,34px);line-height:1.3;margin-bottom:14px}
.section-desc{font-size:16px;color:var(--text-2);line-height:1.85}

.card{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-lg);
  padding:26px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(12px);
  transition:transform .2s ease-out,border-color .2s ease,box-shadow .2s ease;
}
.card:hover{
  transform:translateY(-2px);
  border-color:rgba(22,224,200,.35);
  box-shadow:0 30px 60px -30px rgba(0,0,0,1);
}
.card h3{font-size:19px;line-height:1.5;margin-bottom:10px}
.card p{font-size:14px;color:var(--text-2);line-height:1.85}

/* service matrix */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.svc-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:12px}
.svc-icon{
  flex:0 0 auto;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(47,107,255,.14);border:1px solid rgba(47,107,255,.35);color:var(--cyan);
}
.svc-list{list-style:none;padding:0;margin-top:16px;display:grid;gap:8px}
.svc-list li{position:relative;padding-left:20px;font-size:14px;color:var(--text-2);line-height:1.75}
.svc-list li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;
  background:var(--cyan);opacity:.85;
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 9px;border-radius:6px;
  font-size:12px;letter-spacing:.06em;border:1px solid rgba(22,224,200,.35);
  background:rgba(22,224,200,.1);color:var(--cyan);
}
.badge.warn{border-color:rgba(255,176,32,.4);background:rgba(255,176,32,.1);color:var(--amber)}

/* timeline */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px}
.timeline::before{
  content:"";position:absolute;left:8px;right:8px;top:26px;
  border-top:1px dashed rgba(22,224,200,.35);
}
.step{position:relative;padding-top:68px}
.step-num{
  position:absolute;top:0;left:0;width:52px;height:52px;border-radius:14px;
  display:grid;place-items:center;font-size:15px;font-weight:700;color:var(--cyan);
  background:#0B1424;border:1px solid rgba(22,224,200,.4);
  box-shadow:0 0 0 6px rgba(5,10,22,.9);
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--text-2);line-height:1.8}

.field-figure{margin-top:44px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:rgba(255,255,255,.03)}
.field-figure img{width:100%;aspect-ratio:21/9;object-fit:cover}
.field-figure figcaption{
  padding:14px 20px;font-size:13px;color:var(--text-3);border-top:1px solid var(--line);
  background:rgba(11,20,36,.6);
}

/* pricing */
.price-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:36px;align-items:start}
.include-card{padding:24px;border-radius:var(--r-lg);border:1px solid var(--line);background:rgba(11,20,36,.6)}
.include-card h3{font-size:17px;margin-bottom:6px}
.include-card p{font-size:13px;color:var(--text-3);margin-bottom:16px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;height:28px;padding:0 11px;border-radius:999px;
  font-size:13px;color:var(--text-2);background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.price-card{
  padding:24px 20px;border-radius:var(--r-lg);
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);
  display:flex;flex-direction:column;
  transition:transform .2s ease-out,border-color .2s ease;
}
.price-card:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.3)}
.price-card.is-feature{
  border-color:rgba(22,224,200,.55);
  background:linear-gradient(180deg,rgba(22,224,200,.09),rgba(47,107,255,.06));
  box-shadow:0 0 0 1px rgba(22,224,200,.18),var(--shadow-card);
}
.price-name{font-size:16px;font-weight:600;margin-bottom:6px}
.price-sub{font-size:13px;color:var(--text-3);margin-bottom:16px}
.price-list{list-style:none;padding:0;margin:0 0 20px;display:grid;gap:8px;flex:1}
.price-list li{position:relative;padding-left:18px;font-size:13.5px;color:var(--text-2);line-height:1.7}
.price-list li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.price-card.is-feature .price-link{color:var(--cyan)}

/* faq */
.faq-list{display:grid;gap:12px;max-width:900px}
details.faq{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.08);
  border-left:3px solid transparent;
  border-radius:14px;
  transition:border-color .2s ease,background .2s ease;
}
details.faq[open]{border-left-color:var(--cyan);background:rgba(255,255,255,.06)}
details.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;font-size:16px;font-weight:600;cursor:pointer;list-style:none;
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{
  content:"+";font-size:22px;line-height:1;color:var(--cyan);
  transition:transform .2s ease;flex:0 0 auto;
}
details.faq[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 22px 22px;font-size:15px;line-height:1.9;color:var(--text-2);max-width:62ch}

/* next step */
.next-step{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:34px 36px;border-radius:20px;
  border:1px solid rgba(22,224,200,.32);
  background:linear-gradient(135deg,rgba(47,107,255,.18),rgba(22,224,200,.1));
  position:relative;overflow:hidden;
}
.next-step::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:48px 48px;opacity:.7;
}
.next-step>*{position:relative;z-index:1}
.next-step h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:8px}
.next-step p{font-size:14px;color:var(--text-2);max-width:52ch}
.next-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;z-index:88;background:rgba(2,6,14,.72);
  opacity:0;pointer-events:none;transition:opacity .25s ease;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:90;width:82vw;max-width:360px;
  background:#08111F;border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .28s ease-out;
  padding:20px 20px 28px;display:flex;flex-direction:column;gap:4px;overflow-y:auto;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.04);color:var(--text);font-size:20px;line-height:1;cursor:pointer;
}
.drawer-close:hover{border-color:var(--cyan);color:var(--cyan)}
.drawer-link{
  display:flex;align-items:center;height:44px;padding:0 12px;border-radius:10px;
  font-size:15px;color:var(--text-2);transition:background .2s,color .2s;
}
.drawer-link:hover,.drawer-link.is-active{background:rgba(22,224,200,.1);color:var(--text)}
.drawer-cta{margin-top:18px;width:100%}
.drawer-tel{margin-top:12px;font-size:14px;color:var(--text-3);text-align:center}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:#050A16;padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}
.footer-about .brand{margin-bottom:14px}
.footer-about p{font-size:14px;color:var(--text-2);line-height:1.9;max-width:34ch}
.footer-title{font-size:13px;letter-spacing:.1em;color:var(--text);margin-bottom:14px;font-weight:600}
.footer-links{display:grid;gap:10px;font-size:14px;color:var(--text-2)}
.footer-links a{color:var(--text-2);transition:color .2s}
.footer-links a:hover{color:var(--cyan)}
.footer-links strong{color:var(--text);font-weight:600}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;justify-content:space-between;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  font-size:12px;color:var(--text-3);line-height:1.8;
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-links,.header-actions{display:none}
  .nav-toggle{display:flex}
  .hero{padding:44px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{order:-1}
  .hero-media .media-cap{position:static;padding:14px 18px;background:rgba(11,20,36,.85);}
  .hero-media::after{background:linear-gradient(180deg,rgba(5,10,22,.1),rgba(5,10,22,.45))}
  .section{padding:72px 0}
  .svc-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr;gap:0;margin-top:32px}
  .timeline::before{display:none}
  .step{padding-top:0;padding-left:72px;padding-bottom:26px}
  .step-num{box-shadow:none}
  .price-layout{grid-template-columns:1fr;gap:24px}
  .price-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .card{backdrop-filter:none}
}
@media (max-width:640px){
  .header-inner{height:64px;gap:12px}
  .brand-mark{width:32px;height:32px}
  .brand-name{font-size:16px}
  .hero h1{font-size:clamp(26px,7.4vw,34px)}
  .hero-lead{font-size:15.5px}
  .btn{width:100%}
  .hero-cta{flex-direction:column}
  .stats{grid-template-columns:1fr;gap:1px}
  .stat{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:14px 16px}
  .stat-value{font-size:20px}
  .stat-label{font-size:12px;margin-top:0}
  .section{padding:56px 0}
  .card{padding:20px}
  .next-step{padding:26px 20px}
  .next-actions{width:100%;flex-direction:column}
  .field-figure img{aspect-ratio:16/10}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .card:hover,.price-card:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --bg:#050A16;
  --panel:#0B1424;
  --panel-2:#0A1526;
  --line:#16233A;
  --line-soft:rgba(255,255,255,.08);
  --brand:#2F6BFF;
  --cyan:#16E0C8;
  --amber:#FFB020;
  --text:#E8EEF9;
  --text-2:#94A3BF;
  --text-3:#5F7189;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:8px;
  --shadow-card:0 24px 48px -28px rgba(0,0,0,.9);
  --container:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:10px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:all .2s var(--ease);white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,#2F6BFF 0%,#16E0C8 100%);
  color:#04121F;
  box-shadow:0 10px 30px -14px rgba(47,107,255,.8);
}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 0 0 1px rgba(22,224,200,.5),0 10px 32px -8px rgba(47,107,255,.55)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--text)}
.btn-ghost:hover{border-color:var(--cyan);color:#fff}
.btn-ghost:active{transform:translateY(1px)}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease),backdrop-filter .25s var(--ease);
}
.site-header.scrolled{
  background:rgba(5,10,22,.84);
  backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:22px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:rgba(22,224,200,.1);border:1px solid rgba(22,224,200,.28);
}
.brand-name{font-size:18px;font-weight:700;letter-spacing:.02em;line-height:1.1}
.brand-name em{font-style:normal;color:var(--cyan)}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{
  position:relative;padding:9px 12px;border-radius:8px;
  font-size:14.5px;color:var(--text-2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-links a.is-active{color:var(--text)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--cyan);border-radius:2px;box-shadow:0 0 12px rgba(22,224,200,.7);
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:16px}
.phone{font-size:13px;color:var(--text-3);white-space:nowrap;transition:color .2s}
.phone:hover{color:var(--cyan)}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;
  background:rgba(255,255,255,.05);border:1px solid var(--line-soft);
  cursor:pointer;place-items:center;color:var(--text);
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;margin:3px auto;transition:.2s}

/* ---------- 移动抽屉 ---------- */
.drawer{position:fixed;inset:0;z-index:90;display:none}
.drawer.is-open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(2,6,14,.74)}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:82vw;max-width:340px;
  background:#08111F;border-left:1px solid var(--line);
  padding:18px 18px 24px;display:flex;flex-direction:column;
  transform:translateX(100%);transition:transform .3s var(--ease);
  overflow-y:auto;
}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:46px}
.drawer-close{
  width:40px;height:40px;border-radius:10px;background:rgba(255,255,255,.05);
  border:1px solid var(--line-soft);color:var(--text);cursor:pointer;font-size:18px;line-height:1;
}
.drawer-links{display:flex;flex-direction:column;margin-top:16px}
.drawer-links a{
  height:44px;display:flex;align-items:center;padding:0 12px;border-radius:8px;
  font-size:15px;color:var(--text-2);border-bottom:1px solid rgba(255,255,255,.05);
}
.drawer-links a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.drawer-links a.is-active{color:var(--cyan);background:rgba(22,224,200,.08)}
.drawer-foot{margin-top:auto;padding-top:22px;display:flex;flex-direction:column;gap:12px}
.drawer-foot .btn{width:100%}
.drawer-foot .phone{font-size:13px;text-align:center}

/* ---------- 面包屑 / Hero ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.crumbs a{transition:color .2s}
.crumbs a:hover{color:var(--cyan)}
.crumbs .sep{color:#31415c}
.crumbs .cur{color:var(--text-2)}

.cat-hero{position:relative;overflow:hidden;padding:26px 0 76px;background:radial-gradient(900px 460px at 10% -20%,#0B1A3A 0%,#050A16 62%)}
.hero-grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(47,107,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(47,107,255,.07) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(circle at 30% 20%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 30% 20%,#000 0%,transparent 72%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center;margin-top:32px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;font-weight:600;color:var(--cyan);
  padding:5px 12px;border-radius:999px;
  background:rgba(22,224,200,.08);border:1px solid rgba(22,224,200,.24);
}
.hero-title{
  margin-top:18px;
  font-size:clamp(30px,4.4vw,50px);line-height:1.15;
  font-weight:700;letter-spacing:-.01em;
}
.hero-title-sub{
  display:block;margin-top:12px;
  font-size:.44em;font-weight:600;letter-spacing:.02em;color:var(--cyan);
}
.hero-sub{margin-top:20px;color:var(--text-2);font-size:16.5px;line-height:1.85;max-width:52ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:36px;
  border:1px solid var(--line-soft);border-radius:var(--r-lg);
  background:rgba(255,255,255,.04);backdrop-filter:blur(12px);
  overflow:hidden;
}
.stat-cell{padding:16px 18px;border-right:1px solid var(--line-soft)}
.stat-cell:last-child{border-right:none}
.stat-num{font-family:Inter,"PingFang SC",sans-serif;font-size:25px;font-weight:700;color:var(--cyan);line-height:1.2}
.stat-num small{font-size:13px;font-weight:500;color:var(--text-2);margin-left:4px}
.stat-label{margin-top:4px;font-size:12px;color:var(--text-3);letter-spacing:.04em}

.hero-figure{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-soft);box-shadow:var(--shadow-card)}
.hero-figure img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;opacity:.9}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,22,.15) 0%,rgba(5,10,22,.88) 100%);
}
.hero-figure-cap{
  position:absolute;left:18px;right:18px;bottom:18px;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-2);
}
.hero-figure-cap b{color:var(--text);font-weight:600}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0}
.section-tight{padding:70px 0}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{
  margin-top:10px;
  font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700;
}
.section-desc{margin-top:12px;color:var(--text-2);font-size:15.5px;max-width:66ch}
.divider{height:1px;background:var(--line);border:none;margin:0}

/* ---------- 产品参数卡 ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.prod-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:rgba(255,255,255,.045);
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.10);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.prod-card:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35);box-shadow:0 30px 56px -26px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.14)}
.prod-media{position:relative;aspect-ratio:16/10;overflow:hidden}
.prod-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.prod-card:hover .prod-media img{transform:scale(1.05)}
.prod-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,22,.05) 0%,rgba(5,10,22,.78) 100%)}
.prod-badge{
  position:absolute;left:14px;top:14px;z-index:2;
  font-size:12px;letter-spacing:.06em;font-weight:600;
  padding:4px 9px;border-radius:6px;
  background:rgba(255,176,32,.14);color:var(--amber);
  border:1px solid rgba(255,176,32,.35);
}
.prod-badge.cy{background:rgba(22,224,200,.12);color:var(--cyan);border-color:rgba(22,224,200,.32)}
.prod-body{padding:22px;display:flex;flex-direction:column;gap:14px;flex:1}
.prod-body h3{font-size:19px;font-weight:600;line-height:1.4}
.prod-body .prod-note{font-size:13.5px;color:var(--text-3);line-height:1.7}
.spec-list{display:flex;flex-direction:column}
.spec-list li{
  display:flex;justify-content:space-between;gap:14px;
  padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.07);
  font-size:14px;line-height:1.6;
}
.spec-list li:last-child{border-bottom:none}
.spec-list .k{color:var(--text-3);flex:none}
.spec-list .v{color:var(--text);font-weight:500;text-align:right}
.spec-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  color:var(--cyan);font-weight:600;font-size:14.5px;
}
.spec-link .arrow{transition:transform .2s var(--ease)}
.spec-link:hover .arrow{transform:translateX(4px)}

/* ---------- 对比表 ---------- */
.table-shell{border:1px solid var(--line-soft);border-radius:var(--r-lg);overflow:hidden;background:var(--panel)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.compare{width:100%;min-width:940px;border-collapse:collapse;font-size:14.5px}
table.compare th,table.compare td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
table.compare thead th{
  background:#0C1729;color:var(--text-2);font-weight:600;
  font-size:12.5px;letter-spacing:.06em;white-space:nowrap;
}
table.compare tbody tr:nth-child(even){background:rgba(255,255,255,.022)}
table.compare tbody tr:hover{background:rgba(47,107,255,.09)}
table.compare tbody tr:last-child td{border-bottom:none}
table.compare th:first-child,table.compare td:first-child{
  position:sticky;left:0;z-index:2;background:#0B1424;
  box-shadow:1px 0 0 var(--line);white-space:nowrap;
}
table.compare td:first-child{font-weight:600;color:var(--text)}
table.compare thead th:first-child{background:#0C1729;color:var(--cyan)}
.table-note{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding:14px 20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);background:rgba(255,255,255,.02);
}
.table-note a{color:var(--cyan)}

/* ---------- 选型步骤 ---------- */
.step-rail{display:grid;gap:18px}
.step-row{
  display:grid;grid-template-columns:96px 1fr;gap:26px;align-items:start;
  padding:26px 28px;border-radius:var(--r-lg);
  background:rgba(255,255,255,.035);border:1px solid var(--line-soft);
  transition:border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
}
.step-row:hover{border-color:rgba(22,224,200,.32);background:rgba(255,255,255,.055);transform:translateX(2px)}
.step-num{
  font-family:Inter,"PingFang SC",sans-serif;
  font-size:38px;font-weight:700;line-height:1;
  color:rgba(22,224,200,.16);
  -webkit-text-stroke:1px rgba(22,224,200,.55);
}
.step-row h3{font-size:18.5px;font-weight:600;margin-bottom:8px}
.step-row p{color:var(--text-2);font-size:15px;line-height:1.85}
.step-tip{
  display:inline-block;margin-top:12px;font-size:12.5px;color:var(--amber);
  padding:3px 10px;border-radius:6px;background:rgba(255,176,32,.1);
  border:1px solid rgba(255,176,32,.28);
}

/* ---------- 场景标签 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.tag{
  padding:7px 15px;border-radius:999px;font-size:13px;color:var(--text-2);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.tag:hover{color:var(--cyan);border-color:rgba(22,224,200,.4)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px}
.faq-item{
  background:rgba(255,255,255,.04);border:1px solid var(--line-soft);
  border-radius:14px;overflow:hidden;transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item[open]{border-color:rgba(22,224,200,.3);background:rgba(22,224,200,.04)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-weight:600;font-size:16px;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);display:grid;place-items:center;
  color:var(--cyan);font-size:15px;line-height:1;
  transition:transform .25s var(--ease),border-color .25s;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:rgba(22,224,200,.6)}
.faq-answer{padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:1.9;max-width:64ch}

/* ---------- 下一步 CTA ---------- */
.cta-section{padding:24px 0 88px}
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;
  border:1px solid rgba(22,224,200,.22);
  background:radial-gradient(720px 320px at 18% 0%,rgba(47,107,255,.30),rgba(11,20,36,.92) 70%);
  padding:40px;display:grid;grid-template-columns:1.25fr .75fr;gap:32px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(47,107,255,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(47,107,255,.09) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(circle at 80% 100%,#000 0%,transparent 70%);
  mask-image:radial-gradient(circle at 80% 100%,#000 0%,transparent 70%);
}
.cta-band h2{position:relative;font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.35}
.cta-band p{position:relative;margin-top:12px;color:var(--text-2);font-size:15px;max-width:48ch}
.cta-actions{position:relative;display:flex;flex-direction:column;gap:12px}
.cta-actions .btn{width:100%}
.cta-actions .mini{font-size:12.5px;color:var(--text-3);text-align:center}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:#060C1A;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-about .brand{margin-bottom:0}
.footer-about p{color:var(--text-3);font-size:14px;line-height:1.8;margin-top:14px;max-width:36ch}
.footer-title{font-size:13px;letter-spacing:.08em;font-weight:600;color:var(--text);margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--text-2)}
.footer-links a{transition:color .2s}
.footer-links a:hover{color:var(--cyan)}
.footer-links strong{color:var(--text);font-weight:600}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;
  font-size:12px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-links a{padding:9px 9px;font-size:14px}
  .header-actions .phone{display:none}
}
@media (max-width:1023px){
  .nav-links,.header-actions{display:none}
  .nav-toggle{display:grid}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-figure{order:-1}
  .hero-figure img{aspect-ratio:16/9}
  .prod-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding:72px 0}
  .cta-band{grid-template-columns:1fr;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .header-inner{height:64px}
  .hero-stats{grid-template-columns:1fr;}
  .stat-cell{border-right:none;border-bottom:1px solid var(--line-soft);padding:14px 18px}
  .stat-cell:last-child{border-bottom:none}
  .prod-grid{grid-template-columns:1fr}
  .step-row{grid-template-columns:1fr;gap:14px;padding:22px}
  .step-num{font-size:30px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .cat-hero{padding:18px 0 52px}
  .hero-cta .btn{width:100%}
  .cta-section{padding-bottom:60px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .table-note{flex-direction:column;gap:8px}
}
@media (max-width:479px){
  .footer-grid{grid-template-columns:1fr}
  .brand-name{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .glass,.prod-card,.step-row{transform:none !important}
}

/* roulang page: category3 */
:root{
  --bg:#050A16;
  --panel:#0B1424;
  --line:#16233A;
  --brand:#2F6BFF;
  --cyan:#16E0C8;
  --amber:#FFB020;
  --text:#E8EEF9;
  --muted:#94A3BF;
  --dim:#5F7189;
  --radius:16px;
  --shadow:0 24px 48px -28px rgba(0,0,0,.9);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:Inter,"SF Pro Display","Segoe UI",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:56px 0;position:relative}
.section--tight{padding:40px 0}
.section-head{max-width:760px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.28;letter-spacing:-.01em;margin-top:12px}
.section-head p{color:var(--muted);font-size:15.5px;margin-top:14px;line-height:1.9}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--cyan);text-transform:uppercase}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--cyan);display:block;border-radius:2px}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(5,10,22,.62);transition:background .25s ease,backdrop-filter .25s ease,border-color .25s ease;border-bottom:1px solid transparent}
.site-header.is-scrolled{background:rgba(5,10,22,.9);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom-color:var(--line);box-shadow:0 16px 34px -30px #000}
.nav-wrap{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(47,107,255,.3),rgba(22,224,200,.16));border:1px solid rgba(22,224,200,.3);flex:none}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--text);line-height:1.1}
.brand-name em{font-style:normal;color:var(--cyan)}
.nav-links{display:none;align-items:center;gap:0;margin:0 auto}
.nav-links a{position:relative;display:inline-flex;align-items:center;height:72px;padding:0 13px;font-size:14.5px;color:var(--muted);transition:color .2s ease}
.nav-links a::after{content:"";position:absolute;left:13px;right:13px;bottom:0;height:2px;background:transparent;border-radius:2px;transition:background .2s ease,box-shadow .2s ease}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{background:rgba(22,224,200,.4)}
.nav-links a.is-active{color:#FFFFFF;font-weight:600}
.nav-links a.is-active::after{background:var(--cyan);box-shadow:0 0 12px rgba(22,224,200,.8)}
.nav-cta{display:flex;align-items:center;gap:16px;margin-left:auto}
.nav-phone{display:none;font-family:var(--font-num);font-size:14px;color:var(--muted);letter-spacing:.02em;border-bottom:1px dashed rgba(148,163,191,.4);padding-bottom:2px;transition:color .2s ease,border-color .2s ease}
.nav-phone:hover{color:var(--cyan);border-color:var(--cyan)}
.nav-cta .btn{display:none}
.nav-toggle{width:42px;height:42px;display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);border-radius:10px;cursor:pointer;transition:border-color .2s ease,background .2s ease}
.nav-toggle:hover{border-color:rgba(22,224,200,.5)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px}
@media(min-width:1024px){
  .nav-links{display:flex}
  .nav-cta .btn{display:inline-flex}
  .nav-phone{display:inline-block}
  .nav-toggle{display:none}
}

/* ---------- 抽屉 ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(3,7,15,.72);backdrop-filter:blur(2px);opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;z-index:95}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;width:82vw;max-width:360px;height:100%;z-index:100;background:#08101F;border-left:1px solid var(--line);transform:translateX(100%);transition:transform .3s ease;display:flex;flex-direction:column;padding:20px;gap:6px;overflow-y:auto}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.14);background:transparent;color:var(--muted);font-size:18px;line-height:1;cursor:pointer}
.drawer-close:hover{color:var(--cyan);border-color:rgba(22,224,200,.5)}
.drawer-link{display:flex;align-items:center;height:44px;padding:0 12px;border-radius:10px;font-size:15px;color:var(--muted);transition:background .2s ease,color .2s ease}
.drawer-link:hover{background:rgba(255,255,255,.05);color:var(--text)}
.drawer-link.is-active{background:rgba(22,224,200,.1);color:var(--cyan);font-weight:600}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:12px}
.drawer-foot .btn{width:100%}
.drawer-phone{font-family:var(--font-num);font-size:14px;color:var(--muted)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:10px;font-size:15px;font-weight:600;letter-spacing:.01em;border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease,filter .2s ease}
.btn-primary{background:linear-gradient(135deg,#2F6BFF 0%,#16E0C8 100%);color:#04121F}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 0 0 1px rgba(22,224,200,.5),0 10px 32px -8px rgba(47,107,255,.55)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--text)}
.btn-ghost:hover{border-color:rgba(22,224,200,.6);color:#FFFFFF;box-shadow:0 0 0 1px rgba(22,224,200,.18)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--cyan);transition:gap .2s ease}
.link-arrow::after{content:"→";transition:transform .2s ease}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--dim);margin-bottom:22px}
.crumbs a{color:var(--muted);transition:color .2s ease}
.crumbs a:hover{color:var(--cyan)}
.crumbs .sep{color:var(--dim);opacity:.6}
.crumbs .now{color:var(--muted)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:28px 0 64px;background:radial-gradient(120% 100% at 8% -10%,#0B1A3A 0%,#050A16 62%)}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(47,107,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(47,107,255,.07) 1px,transparent 1px);background-size:48px 48px;pointer-events:none;-webkit-mask-image:radial-gradient(72% 64% at 26% 4%,#000 0%,transparent 82%);mask-image:radial-gradient(72% 64% at 26% 4%,#000 0%,transparent 82%)}
.hero-grid{position:relative;display:grid;gap:40px;align-items:center}
.hero-title{font-size:clamp(30px,4.4vw,52px);line-height:1.15;font-weight:700;letter-spacing:-.01em}
.hero-title .h1-brand{display:block;margin-top:14px;font-size:clamp(17px,1.9vw,22px);font-weight:600;letter-spacing:.02em;color:var(--cyan);line-height:1.4}
.hero-lead{max-width:58ch;margin-top:18px;font-size:16.5px;color:var(--muted);line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:36px;max-width:540px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.1);border-radius:14px;overflow:hidden;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.hero-stats > div{background:rgba(11,20,36,.72);padding:14px 16px}
.stat-num{font-family:var(--font-num);font-size:clamp(22px,2.4vw,27px);font-weight:700;color:var(--cyan);line-height:1.15;letter-spacing:-.01em}
.stat-num small{font-size:13px;font-weight:600;margin-left:2px}
.stat-label{font-size:12px;color:var(--dim);margin-top:5px;letter-spacing:.04em;line-height:1.5}
.hero-figure{position:relative;border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.1);box-shadow:var(--shadow)}
.hero-figure img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.hero-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,22,0) 28%,rgba(5,10,22,.88) 100%)}
.hero-badge{position:absolute;left:16px;right:16px;bottom:16px;z-index:2;display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:12px 14px;border-radius:12px;background:rgba(11,20,36,.78);border:1px solid rgba(22,224,200,.28);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.hero-badge b{font-family:var(--font-num);font-size:15px;color:var(--cyan);letter-spacing:.02em}
.hero-badge span{font-size:12.5px;color:var(--muted);line-height:1.6}
@media(min-width:1024px){
  .hero{padding:40px 0 88px}
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:48px}
}

/* ---------- 现象对路径 ---------- */
.pairs{display:grid;gap:14px}
.pair{display:grid;gap:14px}
.pair-card{position:relative;border-radius:14px;padding:18px 20px 18px 52px;min-height:100%}
.pair-idx{position:absolute;left:16px;top:18px;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-family:var(--font-num);font-size:12px;font-weight:700}
.pair-card h3{font-size:16px;font-weight:600;line-height:1.55;letter-spacing:.005em}
.pair-card p{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.85}
.phenom{background:rgba(148,163,191,.07);border:1px solid rgba(255,255,255,.07)}
.phenom .pair-idx{background:rgba(148,163,191,.16);color:var(--muted);border:1px solid rgba(148,163,191,.24)}
.path{background:rgba(22,224,200,.055);border:1px solid rgba(22,224,200,.32);border-left:3px solid var(--cyan);box-shadow:0 0 0 1px rgba(22,224,200,.05) inset}
.path .pair-idx{background:rgba(22,224,200,.16);color:var(--cyan);border:1px solid rgba(22,224,200,.4)}
.path h3{color:#DFFFFA}
.pair-note{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;display:grid;gap:22px;margin-top:8px}
.timeline::before{content:"";position:absolute;left:16px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,rgba(22,224,200,.75),rgba(22,224,200,.08))}
.tl-item{position:relative;padding-left:48px}
.tl-dot{position:absolute;left:0;top:2px;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-family:var(--font-num);font-size:13px;font-weight:700;color:#04121F;background:linear-gradient(135deg,#2F6BFF,#16E0C8);box-shadow:0 0 0 4px rgba(22,224,200,.12)}
.tl-card{background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;height:100%}
.tl-card:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35)}
.tl-card h3{font-size:17px;font-weight:600;line-height:1.5}
.tl-card p{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.85}
.tl-meta{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}
@media(min-width:900px){
  .timeline{grid-template-columns:repeat(4,1fr);gap:20px}
  .timeline::before{left:0;right:0;top:18px;bottom:auto;width:auto;height:2px;background:repeating-linear-gradient(90deg,rgba(22,224,200,.65) 0 8px,transparent 8px 16px)}
  .tl-item{padding-left:0;padding-top:52px}
  .tl-dot{top:0}
}

/* ---------- 顾问卡 ---------- */
.advisors{display:grid;gap:18px}
.advisor{display:grid;grid-template-columns:86px 1fr;gap:18px;padding:20px;border-radius:var(--radius);background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease}
.advisor:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35)}
.advisor-photo{width:86px;height:86px;border-radius:14px;overflow:hidden;border:1px solid rgba(255,255,255,.1);position:relative}
.advisor-photo img{width:100%;height:100%;object-fit:cover}
.advisor-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,22,.05),rgba(5,10,22,.45))}
.advisor h3{font-size:17px;font-weight:600;line-height:1.5}
.advisor .role{font-size:12.5px;color:var(--cyan);letter-spacing:.04em;margin-top:2px}
.advisor p{margin-top:10px;font-size:14.5px;color:var(--muted);line-height:1.85}
.advisor .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
@media(min-width:768px){
  .advisors{grid-template-columns:1fr 1fr}
  .advisor{grid-template-columns:96px 1fr;padding:22px}
  .advisor-photo{width:96px;height:96px}
}

/* ---------- 标签 ---------- */
.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:6px;font-size:12px;letter-spacing:.04em;color:#A9D2FF;background:rgba(47,107,255,.13);border:1px solid rgba(47,107,255,.28);line-height:1.6}
.chip-cyan{color:#9BF5E8;background:rgba(22,224,200,.1);border-color:rgba(22,224,200,.32)}
.chip-warn{color:#FFD27A;background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.34)}
.chip-mute{color:var(--muted);background:rgba(148,163,191,.1);border-color:rgba(148,163,191,.22)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px}
.faq-item{border:1px solid rgba(255,255,255,.08);border-radius:14px;background:rgba(255,255,255,.035);overflow:hidden;transition:border-color .25s ease,background .25s ease}
.faq-item.is-open{border-color:rgba(22,224,200,.35);background:rgba(255,255,255,.05)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:18px 20px;border:0;background:transparent;color:var(--text);font-size:16px;font-weight:600;text-align:left;cursor:pointer;line-height:1.6}
.faq-q:hover{color:#FFFFFF}
.faq-icon{position:relative;flex:none;width:18px;height:18px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--cyan);border-radius:2px;transition:transform .3s ease,opacity .3s ease}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 20px 20px;color:var(--muted);font-size:15px;line-height:1.9;max-width:62ch}

/* ---------- CTA 横条 ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:20px;border:1px solid rgba(255,255,255,.1);background:linear-gradient(120deg,rgba(11,26,58,.95) 0%,rgba(5,10,22,.98) 70%);padding:28px 24px;display:grid;gap:22px;box-shadow:var(--shadow)}
.cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(47,107,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(47,107,255,.08) 1px,transparent 1px);background-size:48px 48px;pointer-events:none;-webkit-mask-image:radial-gradient(70% 90% at 20% 20%,#000,transparent 85%);mask-image:radial-gradient(70% 90% at 20% 20%,#000,transparent 85%)}
.cta-band h2{position:relative;font-size:clamp(21px,2.4vw,28px);font-weight:700;line-height:1.35}
.cta-band p{position:relative;margin-top:10px;font-size:15px;color:var(--muted);line-height:1.85;max-width:58ch}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:12px}
@media(min-width:900px){
  .cta-band{grid-template-columns:1fr auto;align-items:center;padding:34px 32px}
  .cta-actions{justify-content:flex-end}
}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:#04080F;padding:52px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
.footer-about p{margin-top:14px;font-size:14px;color:var(--muted);line-height:1.9;max-width:36ch}
.footer-title{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--dim);text-transform:uppercase;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--muted)}
.footer-links a{color:var(--muted);transition:color .2s ease;width:fit-content}
.footer-links a:hover{color:var(--cyan)}
.footer-links strong{color:var(--text);font-family:var(--font-num);font-weight:600;letter-spacing:.01em}
.footer-bottom{margin-top:40px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:8px 24px;font-size:12px;color:var(--dim);line-height:1.8}
@media(min-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.15fr;gap:36px}}

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

/* roulang page: category4 */
:root{
    --bg:#050A16;
    --panel:#0B1424;
    --line:#16233A;
    --blue:#2F6BFF;
    --cyan:#16E0C8;
    --amber:#FFB020;
    --text:#E8EEF9;
    --muted:#94A3BF;
    --faint:#5F7189;
    --radius:16px;
    --radius-sm:10px;
    --shadow:0 24px 48px -28px rgba(0,0,0,.9);
    --shadow-hover:0 32px 56px -26px rgba(0,0,0,.95);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  ul,ol{margin:0;padding:0;list-style:none;}
  p{margin:0;}
  h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;}
  :focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
  .section{padding:88px 0;}
  .section-sm{padding:64px 0;}

  /* ===== 顶部导航 ===== */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(5,10,22,.55);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    border-bottom:1px solid transparent;
    transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
  }
  .site-header.is-scrolled{
    background:rgba(5,10,22,.92);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom-color:var(--line);
  }
  .header-inner{display:flex;align-items:center;gap:24px;height:72px;}
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;flex:0 0 auto;}
  .brand-mark{
    display:grid;place-items:center;width:34px;height:34px;border-radius:9px;
    background:linear-gradient(135deg,rgba(47,107,255,.55),rgba(22,224,200,.25));
    border:1px solid rgba(22,224,200,.35);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
  }
  .brand-name{font-size:17px;letter-spacing:.01em;}
  .brand-name em{font-style:normal;color:var(--cyan);}
  .nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;}
  .nav-links a{
    position:relative;padding:9px 12px;font-size:14.5px;color:var(--muted);
    border-radius:8px;transition:color .2s ease;
  }
  .nav-links a::after{
    content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;
    background:var(--cyan);transform:scaleX(0);transform-origin:left;
    transition:transform .22s ease;
  }
  .nav-links a:hover{color:var(--text);}
  .nav-links a:hover::after{transform:scaleX(.6);}
  .nav-links a.is-active{color:var(--text);font-weight:600;}
  .nav-links a.is-active::after{transform:scaleX(1);}
  .header-actions{display:flex;align-items:center;gap:16px;flex:0 0 auto;}
  .header-phone{font-size:13.5px;color:var(--muted);white-space:nowrap;transition:color .2s ease;}
  .header-phone strong{color:var(--text);font-weight:600;letter-spacing:.02em;}
  .header-phone:hover{color:var(--cyan);}
  .nav-toggle{
    display:none;margin-left:auto;width:42px;height:42px;border-radius:10px;
    border:1px solid rgba(255,255,255,.14);align-items:center;justify-content:center;
    transition:border-color .2s ease,background .2s ease;
  }
  .nav-toggle:hover{border-color:rgba(22,224,200,.5);background:rgba(22,224,200,.08);}
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative;}
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
  }
  .nav-toggle span::before{top:-6px;}
  .nav-toggle span::after{top:6px;}

  /* 抽屉 */
  .drawer-mask{
    position:fixed;inset:0;z-index:80;background:rgba(3,7,15,.72);
    opacity:0;pointer-events:none;transition:opacity .25s ease;
  }
  .drawer-mask.is-open{opacity:1;pointer-events:auto;}
  .drawer{
    position:fixed;top:0;right:0;z-index:90;height:100%;width:82vw;max-width:350px;
    background:#08101F;border-left:1px solid var(--line);
    transform:translateX(105%);transition:transform .3s cubic-bezier(.4,0,.2,1);
    display:flex;flex-direction:column;padding:20px 18px 28px;overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
  .drawer-close{width:38px;height:38px;border-radius:9px;border:1px solid rgba(255,255,255,.14);display:grid;place-items:center;color:var(--muted);}
  .drawer-close:hover{color:var(--text);border-color:rgba(22,224,200,.5);}
  .drawer-nav{display:flex;flex-direction:column;gap:4px;padding:16px 0;}
  .drawer-nav a{
    display:flex;align-items:center;height:44px;padding:0 12px;border-radius:8px;
    font-size:15px;color:var(--muted);transition:background .2s ease,color .2s ease;
  }
  .drawer-nav a:hover{background:rgba(255,255,255,.05);color:var(--text);}
  .drawer-nav a.is-active{color:var(--text);background:rgba(22,224,200,.1);font-weight:600;}
  .drawer-foot{margin-top:auto;display:grid;gap:12px;}
  .drawer-foot .btn{width:100%;}
  .drawer-foot .drawer-phone{font-size:13.5px;color:var(--muted);text-align:center;}
  .drawer-foot .drawer-phone strong{color:var(--text);}

  /* ===== 按钮与链接 ===== */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 22px;border-radius:var(--radius-sm);
    font-size:15px;font-weight:600;letter-spacing:.01em;
    transition:filter .2s ease,box-shadow .2s ease,transform .12s ease,border-color .2s ease,color .2s ease;
  }
  .btn-primary{
    background:linear-gradient(135deg,#2F6BFF 0%,#16E0C8 100%);
    color:#04121F;box-shadow:0 12px 30px -16px rgba(47,107,255,.9);
  }
  .btn-primary:hover{
    filter:brightness(1.06);
    box-shadow:0 0 0 1px rgba(22,224,200,.5),0 12px 34px -8px rgba(47,107,255,.55);
  }
  .btn-primary:active{transform:translateY(1px);}
  .btn-ghost{
    background:transparent;border:1px solid rgba(255,255,255,.18);color:var(--text);
  }
  .btn-ghost:hover{border-color:var(--cyan);color:#fff;}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:9px;}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--cyan);
    transition:gap .2s ease,color .2s ease;
  }
  .link-arrow::after{content:"→";transition:transform .2s ease;}
  .link-arrow:hover{gap:10px;}
  .link-arrow:hover::after{transform:translateX(2px);}

  /* ===== 面包屑 ===== */
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--faint);flex-wrap:wrap;}
  .breadcrumb a{color:var(--muted);transition:color .2s ease;}
  .breadcrumb a:hover{color:var(--cyan);}
  .breadcrumb .sep{color:#31405C;}
  .breadcrumb .current{color:var(--text);}

  /* ===== Hero ===== */
  .page-hero{
    position:relative;overflow:hidden;padding:40px 0 76px;
    background:radial-gradient(120% 100% at 18% 0%,#0B1A3A 0%,#050A16 62%);
  }
  .page-hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(47,107,255,.07) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(47,107,255,.07) 1px,transparent 1px);
    background-size:48px 48px;
    -webkit-mask-image:radial-gradient(70% 100% at 30% 0%,#000 0%,transparent 78%);
    mask-image:radial-gradient(70% 100% at 30% 0%,#000 0%,transparent 78%);
  }
  .hero-grid{
    position:relative;display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);
    gap:56px;align-items:center;margin-top:32px;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;border-radius:6px;
    background:rgba(22,224,200,.1);border:1px solid rgba(22,224,200,.3);
    font-size:12px;letter-spacing:.08em;color:var(--cyan);
  }
  .page-hero h1{
    font-size:clamp(30px,4.2vw,50px);line-height:1.15;font-weight:700;letter-spacing:-.01em;
    margin:20px 0 18px;
  }
  .page-hero h1 span{color:var(--cyan);}
  .hero-lead{font-size:16.5px;color:var(--muted);max-width:56ch;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
  .hero-points{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:26px;font-size:13.5px;color:var(--faint);}
  .hero-points span{display:inline-flex;align-items:center;gap:7px;}
  .hero-points span::before{
    content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);
    box-shadow:0 0 8px rgba(22,224,200,.8);
  }
  .hero-visual{position:relative;border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.09);box-shadow:var(--shadow);}
  .hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;}
  .hero-visual::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(5,10,22,.2) 0%,rgba(5,10,22,.72) 68%,rgba(5,10,22,.92) 100%);
  }
  .hero-visual-cap{
    position:absolute;left:0;right:0;bottom:0;z-index:2;padding:22px 22px 20px;
    display:grid;grid-template-columns:repeat(3,1fr);gap:12px;
    background:rgba(11,20,36,.55);border-top:1px solid rgba(255,255,255,.1);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  }
  .hero-visual-cap .num{display:block;font-size:22px;font-weight:700;color:var(--cyan);line-height:1.2;}
  .hero-visual-cap .num small{font-size:12px;font-weight:600;color:var(--muted);margin-left:3px;}
  .hero-visual-cap .lbl{display:block;font-size:12px;color:var(--faint);margin-top:2px;}

  /* ===== 板块标题 ===== */
  .section-head{max-width:720px;margin-bottom:40px;}
  .section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.25;}
  .section-head p{margin-top:14px;color:var(--muted);font-size:15.5px;}
  .section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

  /* ===== 方案包 ===== */
  .package-stack{display:grid;gap:24px;}
  .package-card{
    display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
    background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);
    border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
    transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
  }
  .package-card:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35);box-shadow:var(--shadow-hover);}
  .package-media{position:relative;min-height:320px;overflow:hidden;}
  .package-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
  .package-card:hover .package-media img{transform:scale(1.03);}
  .package-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(160deg,rgba(5,10,22,.28) 0%,rgba(5,10,22,.82) 100%);
  }
  .package-badge{
    position:absolute;top:16px;left:16px;z-index:2;
    display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:6px;
    background:rgba(22,224,200,.16);border:1px solid rgba(22,224,200,.4);
    font-size:12px;letter-spacing:.08em;color:var(--cyan);
  }
  .package-media-note{
    position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
    font-size:12.5px;color:#B7C4DA;letter-spacing:.02em;
  }
  .package-body{padding:28px 30px;display:flex;flex-direction:column;gap:16px;}
  .package-body h3{font-size:20px;font-weight:600;}
  .package-body .package-desc{font-size:14.5px;color:var(--muted);}
  .check-list{display:grid;gap:9px;margin-top:2px;}
  .check-list li{
    position:relative;padding-left:26px;font-size:14px;color:#B7C4DA;line-height:1.7;
  }
  .check-list li::before{
    content:"";position:absolute;left:0;top:5px;width:15px;height:15px;border-radius:4px;
    background:rgba(22,224,200,.12);border:1px solid rgba(22,224,200,.45);
  }
  .check-list li::after{
    content:"";position:absolute;left:4px;top:9px;width:6px;height:3px;
    border-left:2px solid var(--cyan);border-bottom:2px solid var(--cyan);
    transform:rotate(-45deg);
  }
  .package-foot{
    margin-top:auto;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  }
  .package-meta{
    display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--faint);
  }
  .package-meta::before{
    content:"";width:5px;height:5px;border-radius:50%;background:var(--amber);
  }
  .package-meta b{color:var(--amber);font-weight:600;}

  /* ===== 场景标签 ===== */
  .scene-section{
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    background:rgba(11,20,36,.5);
  }
  .tag-row{display:flex;flex-wrap:wrap;gap:12px;}
  .chip{
    display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;border-radius:20px;
    background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.1);
    font-size:14px;color:var(--muted);transition:border-color .2s ease,color .2s ease,transform .2s ease;
  }
  .chip:hover{border-color:rgba(22,224,200,.45);color:var(--text);transform:translateY(-2px);}
  .chip i{
    width:6px;height:6px;border-radius:50%;background:rgba(47,107,255,.9);flex:0 0 auto;
  }

  /* ===== 校准与支持 ===== */
  .support-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
  .support-card{
    background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08);
    border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);
    transition:border-color .2s ease,transform .2s ease;
  }
  .support-card:hover{border-color:rgba(22,224,200,.32);transform:translateY(-2px);}
  .support-card .support-icon{
    display:grid;place-items:center;width:44px;height:44px;border-radius:12px;
    background:rgba(47,107,255,.16);border:1px solid rgba(47,107,255,.35);color:var(--cyan);
    margin-bottom:18px;
  }
  .support-card h3{font-size:19px;font-weight:600;margin-bottom:12px;}
  .support-list{display:grid;gap:12px;margin-top:16px;}
  .support-list li{
    position:relative;padding-left:18px;font-size:14.5px;color:var(--muted);line-height:1.75;
  }
  .support-list li::before{
    content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;
    background:rgba(22,224,200,.75);
  }

  /* ===== 交付节奏 ===== */
  .timeline{
    display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;position:relative;
  }
  .timeline::before{
    content:"";position:absolute;left:8%;right:8%;top:26px;height:1px;
    background:repeating-linear-gradient(90deg,rgba(22,224,200,.45) 0 8px,transparent 8px 16px);
  }
  .step{position:relative;padding-top:0;}
  .step-num{
    position:relative;z-index:2;display:grid;place-items:center;
    width:52px;height:52px;border-radius:14px;font-size:15px;font-weight:700;letter-spacing:.04em;
    background:rgba(11,20,36,.95);border:1px solid rgba(22,224,200,.35);color:var(--cyan);
    box-shadow:0 12px 28px -18px rgba(22,224,200,.9);
  }
  .step h3{font-size:16.5px;font-weight:600;margin:18px 0 8px;}
  .step p{font-size:14px;color:var(--muted);line-height:1.75;}

  /* ===== FAQ ===== */
  .faq-stack{display:grid;gap:12px;max-width:880px;}
  .faq-item{
    background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);
    border-radius:12px;overflow:hidden;transition:border-color .2s ease;
  }
  .faq-item.is-open{border-color:rgba(22,224,200,.35);}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;text-align:left;font-size:15.5px;font-weight:600;color:var(--text);
    transition:color .2s ease;
  }
  .faq-q:hover{color:var(--cyan);}
  .faq-icon{
    flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .25s ease;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--cyan);border-radius:2px;
  }
  .faq-icon::before{left:0;top:10px;width:22px;height:2px;}
  .faq-icon::after{left:10px;top:0;width:2px;height:22px;transition:opacity .25s ease;}
  .faq-item.is-open .faq-icon{transform:rotate(45deg);}
  .faq-a{
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .faq-a p{
    padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.85;max-width:62ch;
  }

  /* ===== 下一步横条 ===== */
  .next-step{
    position:relative;overflow:hidden;border-radius:20px;
    border:1px solid rgba(255,255,255,.1);
    background:radial-gradient(120% 140% at 12% 0%,#0B1A3A 0%,#070E1D 68%);
    padding:44px;box-shadow:var(--shadow);
  }
  .next-step::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(47,107,255,.07) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(47,107,255,.07) 1px,transparent 1px);
    background-size:48px 48px;
    -webkit-mask-image:radial-gradient(80% 120% at 80% 100%,#000 0%,transparent 76%);
    mask-image:radial-gradient(80% 120% at 80% 100%,#000 0%,transparent 76%);
  }
  .next-step-inner{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;align-items:center;}
  .next-step h2{font-size:clamp(22px,2.4vw,30px);}
  .next-step p{margin-top:12px;color:var(--muted);font-size:15px;max-width:44ch;}
  .next-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
  .next-card{
    display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:12px;
    background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);
    transition:border-color .2s ease,transform .2s ease,background .2s ease;
  }
  .next-card:hover{border-color:rgba(22,224,200,.45);transform:translateY(-2px);background:rgba(22,224,200,.07);}
  .next-card strong{font-size:15.5px;}
  .next-card span{font-size:13px;color:var(--muted);line-height:1.7;}

  /* ===== 页脚 ===== */
  .site-footer{
    margin-top:96px;border-top:1px solid var(--line);
    background:#040812;padding:64px 0 28px;
  }
  .footer-grid{
    display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;
  }
  .footer-about .brand{margin-bottom:16px;}
  .footer-about p{font-size:13.5px;color:var(--faint);line-height:1.9;max-width:34ch;}
  .footer-title{
    font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:16px;font-weight:600;
  }
  .footer-links{display:grid;gap:11px;font-size:14px;}
  .footer-links a,.footer-links span{color:var(--faint);font-size:13.5px;transition:color .2s ease;}
  .footer-links a:hover{color:var(--cyan);}
  .footer-links strong{color:var(--text);font-weight:600;}
  .footer-bottom{
    margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;
    font-size:12px;color:#47566E;
  }

  /* ===== 响应式 ===== */
  @media (max-width:1279px){
    .container{max-width:1080px;}
  }
  @media (max-width:1023px){
    .nav-links{display:none;}
    .header-actions{display:none;}
    .nav-toggle{display:inline-flex;}
    .hero-grid{grid-template-columns:1fr;gap:36px;}
    .hero-visual{order:-1;}
    .package-card{grid-template-columns:1fr;}
    .package-media{min-height:220px;aspect-ratio:16/9;}
    .support-grid{grid-template-columns:1fr;}
    .timeline{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
    .timeline::before{display:none;}
    .next-step-inner{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .section{padding:72px 0;}
  }
  @media (max-width:639px){
    .container{padding:0 18px;}
    .section{padding:56px 0;}
    .section-sm{padding:44px 0;}
    .page-hero{padding:26px 0 56px;}
    .hero-actions{flex-direction:column;align-items:stretch;}
    .hero-actions .btn{width:100%;}
    .hero-visual-cap{grid-template-columns:1fr 1fr;gap:10px;padding:16px;}
    .hero-visual-cap > div:last-child{display:none;}
    .hero-visual img{aspect-ratio:16/11;}
    .package-body{padding:22px 20px;}
    .timeline{grid-template-columns:1fr;}
    .next-step{padding:26px 20px;border-radius:16px;}
    .next-actions{grid-template-columns:1fr;}
    .support-card{padding:22px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
    .faq-q{padding:16px 16px;font-size:14.5px;}
    .faq-a p{padding:0 16px 16px;}
    .chip{height:36px;padding:0 14px;font-size:13px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;}
    html{scroll-behavior:auto;}
  }

/* roulang page: category5 */
:root{
  --bg:#050A16;
  --panel:#0B1424;
  --field:#0A1526;
  --line:#16233A;
  --brand:#2F6BFF;
  --cyan:#16E0C8;
  --amber:#FFB020;
  --text:#E8EEF9;
  --muted:#94A3BF;
  --dim:#5F7189;
  --grid:rgba(47,107,255,.07);
  --r-lg:18px;
  --r-md:14px;
  --r-sm:10px;
  --shadow:0 24px 48px -28px rgba(0,0,0,.9);
  --shell:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
time{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(22,224,200,.28);color:#fff}

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

/* ---------- 品牌标识 ---------- */
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:rgba(22,224,200,.09);
  border:1px solid rgba(22,224,200,.3);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
  flex:0 0 auto;
}
.brand-name{font-size:18px;font-weight:700;letter-spacing:.02em;color:var(--text);white-space:nowrap}
.brand-name em{font-style:normal;color:var(--cyan);letter-spacing:.06em}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  border-bottom:1px solid transparent;
  background:linear-gradient(180deg,rgba(5,10,22,.86),rgba(5,10,22,.35));
  transition:background .22s ease,border-color .22s ease,backdrop-filter .22s ease;
}
.site-header.is-scrolled{
  background:rgba(6,12,24,.88);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:72px}
.nav-links{display:flex;align-items:center;gap:2px;margin-inline:auto}
.nav-links a{
  position:relative;
  padding:9px 12px;border-radius:8px;
  font-size:15px;color:var(--muted);
  transition:color .18s ease,background .18s ease;
}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-links a.is-active{color:#fff}
.nav-links a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 12px rgba(22,224,200,.75);
}
.header-actions{display:flex;align-items:center;gap:16px}
.tel-link{font-size:14px;color:var(--muted);white-space:nowrap;transition:color .18s ease}
.tel-link:hover{color:var(--cyan)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease,filter .22s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#2F6BFF 0%,#16E0C8 100%);
  color:#04121F;
  box-shadow:0 10px 26px -14px rgba(47,107,255,.75);
}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 0 0 1px rgba(22,224,200,.5),0 10px 32px -8px rgba(47,107,255,.55)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:rgba(255,255,255,.18);color:var(--text)}
.btn-ghost:hover{border-color:rgba(22,224,200,.6);color:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}

/* ---------- 移动端抽屉 ---------- */
.nav-toggle{
  display:none;width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  border-radius:10px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text)}
.drawer{
  position:fixed;top:0;right:0;z-index:95;
  width:82vw;max-width:360px;height:100dvh;
  display:flex;flex-direction:column;
  padding:20px 18px 24px;
  background:#081326;border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform .28s ease;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);cursor:pointer;color:var(--muted);
}
.drawer-close:hover{color:#fff;border-color:rgba(22,224,200,.5)}
.drawer-links{display:grid;gap:2px;margin-top:14px}
.drawer-links a{
  display:flex;align-items:center;height:44px;padding:0 12px;border-radius:10px;
  font-size:15px;color:var(--muted);border-bottom:1px solid rgba(255,255,255,.05);
  transition:color .18s ease,background .18s ease;
}
.drawer-links a:hover{color:#fff;background:rgba(255,255,255,.05)}
.drawer-links a.is-active{
  color:#fff;background:rgba(22,224,200,.1);box-shadow:inset 2px 0 0 var(--cyan);border-bottom-color:transparent;
}
.drawer-foot{margin-top:auto;padding-top:24px;display:grid;gap:12px}
.drawer-tel{font-size:13px;color:var(--dim);text-align:center}
.drawer-mask{
  position:fixed;inset:0;z-index:90;background:rgba(3,7,16,.66);
  opacity:0;pointer-events:none;transition:opacity .26s ease;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
body.no-scroll{overflow:hidden}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 480px at 16% -10%,#0B1A3A 0%,rgba(5,10,22,0) 70%),
    var(--bg);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 86%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 86%);
}
.hero-grid{
  position:relative;display:grid;grid-template-columns:1.05fr .95fr;
  gap:56px;align-items:center;padding:64px 0 88px;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--dim);margin-bottom:22px}
.crumbs a{color:var(--muted);transition:color .18s ease}
.crumbs a:hover{color:var(--cyan)}
.crumb-sep{color:rgba(95,113,137,.6)}
.crumb-current{color:#C6D4E8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--cyan);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px rgba(22,224,200,.9);display:block}
.hero-title{
  margin-top:18px;
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.15;font-weight:700;letter-spacing:-.01em;
}
.h1-line{display:block}
.h1-sub{
  display:block;margin-top:12px;
  font-size:clamp(18px,2.2vw,26px);line-height:1.45;
  font-weight:600;letter-spacing:0;color:#C6D4E8;
}
.hero-lead{margin-top:18px;max-width:56ch;font-size:16px;line-height:1.85;color:var(--muted)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-visual{min-width:0}
.visual-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/11;
  border-radius:var(--r-lg);
  border:1px solid rgba(255,255,255,.1);
  background:var(--field);
  box-shadow:var(--shadow);
}
.visual-frame img{width:100%;height:100%;object-fit:cover}
.visual-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,22,.15) 0%,rgba(5,10,22,.62) 62%,rgba(5,10,22,.88) 100%);
}
.visual-badge{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;
  font-size:13px;color:#DFF9F4;
  background:rgba(8,19,38,.8);
  border:1px solid rgba(22,224,200,.35);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.visual-badge b{font-weight:700;color:var(--cyan)}
.metric-strip{
  margin-top:16px;display:grid;grid-template-columns:repeat(3,1fr);
  border-radius:var(--r-md);overflow:hidden;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.metric{padding:14px 18px;min-width:0}
.metric + .metric{border-left:1px solid rgba(255,255,255,.07)}
.metric b{
  display:block;font-family:Inter,"SFMono-Regular",system-ui,sans-serif;
  font-size:26px;line-height:1.2;font-weight:700;color:var(--cyan);
}
.metric span{display:block;margin-top:2px;font-size:12px;letter-spacing:.04em;color:var(--muted)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-standards{background:linear-gradient(180deg,rgba(11,20,36,.62),rgba(5,10,22,0) 88%)}
.section-alt{background:linear-gradient(180deg,rgba(11,26,58,.5),rgba(5,10,22,0) 92%);border-top:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:40px}
.section-head h2{margin-top:12px;font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700}
.section-desc{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.85}
.row-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.head-note{font-size:14px;color:var(--dim);white-space:nowrap}

/* ---------- 版本节点时间线 ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.tl-item{
  position:relative;padding:22px 20px 20px;
  border-radius:var(--r-md);
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.08);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.tl-item::before{
  content:"";position:absolute;top:-1px;left:20px;right:20px;height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(22,224,200,0));
  border-radius:2px;
}
.tl-item:hover{transform:translateY(-2px);border-color:rgba(22,224,200,.35);box-shadow:var(--shadow)}
.tl-date{
  display:inline-block;font-family:Inter,system-ui,sans-serif;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--cyan);
}
.tl-item h3{margin-top:8px;font-size:18px;line-height:1.5;font-weight:600}
.tl-item p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--muted)}
.tl-item .tag{margin-top:14px}

.tag{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:6px;
  font-size:12px;letter-spacing:.04em;
  background:rgba(47,107,255,.14);color:#A8C2FF;border:1px solid rgba(47,107,255,.3);
}
.tag-amber{background:rgba(255,176,32,.12);color:#FFCB6B;border-color:rgba(255,176,32,.32)}
.tag-cyan{background:rgba(22,224,200,.12);color:#8DF3E3;border-color:rgba(22,224,200,.32)}

/* ---------- 标准条目 + 侧栏 ---------- */
.standards-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start}
.entry-list{display:grid;gap:14px;min-width:0}
.entry{
  display:grid;grid-template-columns:56px minmax(0,1fr);gap:18px;
  padding:22px 24px;border-radius:var(--r-md);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  transition:transform .2s ease,border-color .2s ease,background .2s ease,box-shadow .2s ease;
}
.entry:hover{
  transform:translateY(-2px);
  border-color:rgba(22,224,200,.35);
  background:rgba(255,255,255,.055);
  box-shadow:var(--shadow);
}
.entry-index{
  font-family:Inter,system-ui,sans-serif;font-size:24px;font-weight:700;line-height:1.25;
  color:rgba(148,163,191,.45);transition:color .2s ease;
}
.entry:hover .entry-index{color:var(--cyan)}
.entry-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:12px;color:var(--dim)}
.entry h3{margin-top:10px;font-size:18px;line-height:1.5;font-weight:600}
.entry h3 a{transition:color .18s ease}
.entry h3 a:hover{color:var(--cyan)}
.entry p{margin-top:8px;font-size:14.5px;line-height:1.75;color:var(--muted)}
.entry-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:12px;
  font-size:13.5px;color:var(--cyan);
}
.entry-link span{transition:transform .2s ease}
.entry-link:hover span{transform:translateX(4px)}

.standards-side{position:sticky;top:96px;display:grid;gap:16px;min-width:0}
.side-card{
  padding:20px;border-radius:var(--r-md);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
}
.side-title{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--dim)}
.tree-list{margin-top:12px;display:grid;gap:2px}
.tree-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:8px 10px;border-radius:8px;
  font-size:14px;color:var(--muted);
  transition:background .18s ease,color .18s ease;
}
.tree-list a:hover{background:rgba(47,107,255,.14);color:#fff}
.tree-list a span{font-size:12px;color:var(--dim)}
.tree-list a:hover span{color:var(--cyan)}
.hot-list{margin-top:6px}
.hot-list li + li{border-top:1px dashed rgba(255,255,255,.08)}
.hot-list a{display:block;padding:10px 0;font-size:14px;line-height:1.6;color:var(--muted);transition:color .18s ease}
.hot-list a:hover{color:var(--cyan)}
.side-cta{
  background:linear-gradient(158deg,rgba(47,107,255,.18),rgba(22,224,200,.06));
  border-color:rgba(22,224,200,.28);
}
.side-cta p{margin:10px 0 14px;font-size:13.5px;line-height:1.75;color:var(--muted)}

/* ---------- 交付内容 ---------- */
.deliver-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.deliver{
  display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;
  padding:24px;border-radius:var(--r-md);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  transition:border-color .2s ease,transform .2s ease;
}
.deliver:hover{border-color:rgba(22,224,200,.32);transform:translateY(-2px)}
.deliver-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(22,224,200,.1);border:1px solid rgba(22,224,200,.28);
}
.deliver h3{font-size:17px;font-weight:600;line-height:1.5}
.deliver p{margin-top:8px;font-size:14px;line-height:1.78;color:var(--muted)}

/* ---------- 四步流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{
  padding:24px 20px;border-radius:var(--r-md);
  background:rgba(11,20,36,.72);
  border:1px solid rgba(255,255,255,.08);
  transition:border-color .2s ease,background .2s ease;
}
.step:hover{border-color:rgba(22,224,200,.3);background:rgba(11,26,58,.8)}
.step-num{
  font-family:Inter,system-ui,sans-serif;font-size:32px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(22,224,200,.55);
}
.step h3{margin-top:12px;font-size:16.5px;font-weight:600;line-height:1.5}
.step p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:920px}
.faq-item{
  border-radius:var(--r-md);
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.08);
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.is-open{border-color:rgba(22,224,200,.34);box-shadow:inset 3px 0 0 var(--cyan)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;border:0;background:none;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;line-height:1.6;color:var(--text);
  transition:color .18s ease;
}
.faq-q:hover{color:#fff}
.faq-icon{position:relative;width:14px;height:14px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--muted);border-radius:2px;
  transition:transform .28s ease,background .2s ease,opacity .2s ease;
}
.faq-icon::before{left:0;top:6px;width:14px;height:2px}
.faq-icon::after{left:6px;top:0;width:2px;height:14px}
.faq-item.is-open .faq-icon::before{background:var(--cyan)}
.faq-item.is-open .faq-icon::after{transform:rotate(45deg);opacity:0;background:var(--cyan)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.is-open .faq-a{max-height:340px}
.faq-a p{padding:0 22px 20px;max-width:62ch;font-size:15px;line-height:1.85;color:var(--muted)}

/* ---------- 订阅与下一步 ---------- */
.section-cta{
  position:relative;overflow:hidden;
  border-top:1px solid var(--line);
  background:
    radial-gradient(760px 420px at 78% 18%,#0B1A3A 0%,rgba(5,10,22,0) 72%),
    var(--bg);
}
.section-cta::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(600px 320px at 75% 30%,rgba(0,0,0,.9),transparent 80%);
  mask-image:radial-gradient(600px 320px at 75% 30%,rgba(0,0,0,.9),transparent 80%);
}
.cta-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.cta-grid h2{margin-top:12px;font-size:clamp(23px,2.5vw,32px);line-height:1.32;font-weight:700}
.cta-grid .cta-lead{margin-top:14px;font-size:15px;line-height:1.85;color:var(--muted);max-width:52ch}
.check-list{margin-top:22px;display:grid;gap:12px}
.check-list li{display:flex;gap:10px;font-size:14.5px;line-height:1.75;color:var(--muted)}
.check-list li::before{content:"✓";color:var(--cyan);font-weight:700;flex:0 0 auto}
.sub-form{
  position:relative;padding:28px;border-radius:16px;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.1);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
}
.field{margin-bottom:16px}
.field label{display:block;margin-bottom:8px;font-size:13px;color:var(--muted)}
.field input{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  background:var(--field);
  border:1px solid rgba(255,255,255,.12);
  color:var(--text);font-size:15px;
  outline:none;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field input::placeholder{color:rgba(95,113,137,.85)}
.field input:hover{border-color:rgba(255,255,255,.22)}
.field input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(22,224,200,.16)}
.field.has-error input{border-color:var(--amber);box-shadow:0 0 0 3px rgba(255,176,32,.12)}
.form-note{margin-top:12px;font-size:12.5px;line-height:1.7;color:var(--dim)}
.form-note a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}
.form-msg{min-height:22px;margin-top:10px;font-size:13px;color:var(--cyan)}
.form-msg.is-error{color:#FFCB6B}
.next-bar{
  position:relative;margin-top:44px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 26px;border-radius:16px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
}
.next-bar p{font-size:15px;color:var(--muted)}
.next-bar strong{color:var(--text);font-weight:600}
.next-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:#040914;
  padding:64px 0 28px;
}
.site-footer .container{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px}
.footer-grid{display:grid;grid-template-columns:1.55fr 1fr 1fr 1.1fr;gap:40px}
.footer-about .brand{margin-bottom:14px}
.footer-about p{font-size:14px;line-height:1.85;color:var(--muted)}
.footer-title{margin-bottom:14px;font-size:13px;font-weight:600;letter-spacing:.08em;color:#C6D4E8}
.footer-links{display:grid;gap:10px;font-size:14px;line-height:1.7;color:var(--muted)}
.footer-links a{transition:color .18s ease}
.footer-links a:hover{color:var(--cyan)}
.footer-links strong{color:#DFF9F4;font-weight:600}
.footer-links span{display:block}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 24px;
  font-size:12px;line-height:1.7;color:var(--dim);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links,.header-actions{display:none}
  .nav-toggle{display:flex}
  .header-inner{justify-content:space-between}
  .hero-grid{grid-template-columns:1fr;gap:36px;padding:44px 0 64px}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .standards-layout{grid-template-columns:1fr;gap:24px}
  .standards-side{position:static;grid-template-columns:repeat(2,1fr)}
  .side-cta{grid-column:1 / -1}
  .deliver-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
  .row-head{flex-direction:column;align-items:flex-start;gap:10px}
  .head-note{white-space:normal}
}
@media (max-width:639px){
  body{font-size:15.5px}
  .shell,.site-footer .container{padding:0 18px}
  .section{padding:56px 0}
  .hero-grid{padding:32px 0 56px}
  .hero-title{font-size:clamp(27px,7.6vw,34px)}
  .h1-sub{font-size:17px}
  .btn-row{flex-direction:column;align-items:stretch}
  .btn-row .btn{width:100%}
  .metric-strip{grid-template-columns:1fr}
  .metric + .metric{border-left:0;border-top:1px solid rgba(255,255,255,.07)}
  .timeline{grid-template-columns:1fr}
  .entry{grid-template-columns:1fr;gap:10px;padding:20px}
  .entry-index{font-size:18px}
  .standards-side{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .deliver{grid-template-columns:1fr}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px}
  .sub-form{padding:22px}
  .next-bar{padding:20px;flex-direction:column;align-items:stretch}
  .next-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
}