/* roulang page: index */
:root{
  --ink-900:#060D15;
  --ink-800:#0A141F;
  --ink-700:#0F1E2C;
  --ink-600:#16293A;
  --cyan:#2FD4C8;
  --cyan-deep:#14A79E;
  --cyan-light:#7FEAE0;
  --gold:#EFB25C;
  --warn:#F2705C;
  --text:#EAF2F8;
  --text-2:#9FB3C4;
  --text-3:#6B8095;
  --line:rgba(255,255,255,.08);
  --line-hover:rgba(255,255,255,.16);
  --cyan-line:rgba(47,212,200,.35);
  --r-card:18px;
  --r-panel:24px;
  --r-btn:12px;
  --shadow:0 20px 50px -20px rgba(0,0,0,.75), inset 0 1px 0 rgba(255,255,255,.06);
  --ease:240ms cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--ink-900);
  --bs-body-color:var(--text);
  --bs-primary:#2FD4C8;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-border-radius:12px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease);}
a:hover{color:var(--cyan-light);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;}
.container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;width:100%;}
.section{padding:96px 0;position:relative;}
.section-alt{background:var(--ink-800);}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.14em;color:var(--cyan);
  text-transform:none;font-weight:500;
}
.sec-eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan-line);}
.sec-title{font-size:clamp(24px,3vw,31px);line-height:1.35;margin:16px 0 0;}
.sec-lead{color:var(--text-2);font-size:15.5px;line-height:1.9;max-width:760px;margin-top:14px;}

/* ---------- 按钮 ---------- */
.btn-glow,.btn-ghost,.btn-gold{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;border:1px solid transparent;
  cursor:pointer;transition:all var(--ease);white-space:nowrap;
}
.btn-glow{
  background:linear-gradient(135deg,var(--cyan-light),var(--cyan));
  color:#04222A;
  box-shadow:0 10px 30px -12px rgba(47,212,200,.65);
}
.btn-glow:hover{color:#04222A;box-shadow:0 0 0 1px rgba(47,212,200,.5),0 10px 34px -8px rgba(47,212,200,.55);transform:translateY(-2px);}
.btn-ghost{background:transparent;border-color:var(--line-hover);color:var(--text);}
.btn-ghost:hover{border-color:var(--cyan-line);color:var(--cyan-light);transform:translateY(-2px);}
.btn-gold{background:transparent;border-color:rgba(239,178,92,.45);color:var(--gold);}
.btn-gold:hover{color:#FFD9A0;border-color:rgba(239,178,92,.8);transform:translateY(-2px);}
.btn-sm{height:38px;padding:0 18px;font-size:13.5px;border-radius:999px;}
.btn-block{width:100%;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  transition:background var(--ease),backdrop-filter var(--ease),border-color var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(6,13,21,.78);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px;}
.brand{display:flex;align-items:baseline;gap:8px;}
.brand-mark{font-size:20px;font-weight:700;letter-spacing:.02em;color:var(--text);}
.brand-sub{font-size:12.5px;letter-spacing:.08em;color:var(--text-3);}
.brand:hover .brand-mark{color:var(--cyan-light);}
.nav-links{align-items:center;gap:20px;}
.nav-link{
  position:relative;font-size:14.5px;letter-spacing:.02em;color:var(--text-2);
  padding:6px 0;display:inline-flex;align-items:center;gap:8px;
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:1px;background:var(--cyan);
  transition:left var(--ease),right var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{left:0;right:0;}
.nav-link.is-active{color:var(--text);font-weight:600;}
.nav-link.is-active::after{left:0;right:14px;right:0;background:var(--cyan-line);}
.nav-link.is-active::before{
  content:"";width:4px;height:4px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 8px rgba(47,212,200,.9);flex:0 0 4px;
}
.nav-sep{width:1px;height:14px;background:var(--line);display:inline-block;}
.nav-right{display:flex;align-items:center;gap:14px;}
.nav-toggle{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.03);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--text-2);transition:all var(--ease);}
.nav-toggle:hover{border-color:var(--cyan-line);}
.nav-toggle:hover span{background:var(--cyan);}
.offcanvas.mobile-nav{background:var(--ink-900);color:var(--text);border-right:1px solid var(--line);width:min(360px,88vw);}
.offcanvas.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:20px 22px;}
.offcanvas.mobile-nav .offcanvas-body{padding:8px 22px 22px;display:flex;flex-direction:column;}
.mobile-nav .m-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 0;font-size:16px;color:var(--text);border-bottom:1px solid var(--line);
}
.mobile-nav .m-link.is-active{color:var(--cyan-light);}
.mobile-nav .m-link span{color:var(--text-3);font-size:13px;}
.mobile-nav .m-cta{margin-top:auto;padding-top:24px;}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:640px;height:86vh;display:flex;align-items:center;
  overflow:hidden;padding:120px 0 72px;
}
.hero-bg{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(60% 70% at 82% 12%, rgba(47,212,200,.18), transparent 70%),
    linear-gradient(90deg, rgba(6,13,21,.92) 0%, rgba(6,13,21,.62) 48%, rgba(6,13,21,0) 100%);
}
.hero .container{position:relative;z-index:2;}
.hero-inner{display:grid;grid-template-columns:minmax(0,1fr) 420px;gap:56px;align-items:center;}
.hero-copy{max-width:640px;}
.hero-tag{
  display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;
  border:1px solid var(--cyan-line);background:rgba(47,212,200,.08);
  font-size:12.5px;letter-spacing:.06em;color:var(--cyan-light);margin-bottom:24px;
}
.hero h1{
  font-size:clamp(30px,4.6vw,52px);line-height:1.25;letter-spacing:-.01em;font-weight:700;
}
.hero h1 .grad{
  background:linear-gradient(100deg,var(--cyan-light),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  margin-top:22px;font-size:17px;line-height:1.9;color:var(--text-2);max-width:560px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-trust{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:30px;}
.hero-trust span{
  font-size:12.5px;color:var(--text-3);display:inline-flex;align-items:center;gap:8px;
}
.hero-trust span+span::before{content:"";width:1px;height:12px;background:var(--line-hover);margin-right:16px;}
.glass{
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border:1px solid rgba(255,255,255,.10);
  border-radius:var(--r-panel);
  background-color:rgba(15,30,44,.72);
}
.hero-side{position:relative;height:340px;}
.hero-card{
  position:absolute;width:100%;padding:24px 24px 22px;
  box-shadow:var(--shadow);
}
.hero-card.a{transform:rotate(-1.5deg);top:0;left:0;}
.hero-card.b{transform:rotate(1deg);bottom:0;left:28px;width:calc(100% - 28px);}
.hero-card h3{font-size:15px;font-weight:600;color:var(--text);letter-spacing:.02em;}
.hero-card .hc-label{font-size:12px;color:var(--text-3);letter-spacing:.1em;margin-bottom:14px;display:block;}
.hc-row{display:flex;align-items:center;justify-content:space-between;padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--text-2);}
.hc-row:last-child{border-bottom:none;padding-bottom:0;}
.hc-row b{color:var(--text);font-weight:600;}
.dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);display:inline-block;box-shadow:0 0 8px rgba(47,212,200,.8);margin-right:8px;}
.dot.gold{background:var(--gold);box-shadow:0 0 8px rgba(239,178,92,.8);}

/* ---------- 三步上手 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;position:relative;margin-top:56px;}
.step{position:relative;padding:0 32px;}
.step:first-child{padding-left:0;}
.step:last-child{padding-right:0;border-right:none;}
.step-line{
  position:absolute;top:20px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan-line) 12%,var(--cyan-line) 88%,transparent);
}
.step-line i{
  position:absolute;top:-3px;width:7px;height:7px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 12px rgba(47,212,200,.9);
}
.step-num{
  position:relative;z-index:2;width:42px;height:42px;border-radius:50%;
  border:1px solid var(--cyan-line);background:var(--ink-900);
  display:flex;align-items:center;justify-content:center;
  font-size:13.5px;font-weight:600;color:var(--cyan);letter-spacing:.04em;
  font-family:"Inter",system-ui,sans-serif;
}
.step h3{font-size:20px;font-weight:600;margin-top:24px;line-height:1.45;}
.step p{color:var(--text-2);font-size:14.5px;margin-top:10px;line-height:1.85;max-width:300px;}

/* ---------- 能力面板 ---------- */
.cap-panel{
  border:1px solid var(--line);border-radius:var(--r-panel);
  background:linear-gradient(180deg,var(--ink-700),var(--ink-800));
  box-shadow:var(--shadow);overflow:hidden;
}
.cap-panel .row{margin:0;}
.cap-left{padding:44px 44px 40px;}
.cap-right{padding:44px 40px 40px;border-left:1px solid var(--line);display:flex;flex-direction:column;gap:18px;justify-content:center;}
.cap-row{display:grid;grid-template-columns:200px 1fr;gap:24px;padding:18px 0;border-bottom:1px solid var(--line);}
.cap-row:last-child{border-bottom:none;padding-bottom:0;}
.cap-name{font-size:16px;font-weight:600;color:var(--text);display:flex;align-items:center;gap:10px;}
.cap-name::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);flex:0 0 6px;}
.cap-desc{font-size:14.5px;color:var(--text-2);line-height:1.85;}
.stat-card{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:rgba(255,255,255,.03);padding:20px 20px 18px;
  transition:all var(--ease);
}
.stat-card:hover{border-color:var(--cyan-line);transform:translateY(-3px);}
.stat-card.gold-em{border-color:rgba(239,178,92,.28);}
.stat-card.gold-em .stat-value{color:var(--gold);}
.stat-label{font-size:12px;letter-spacing:.1em;color:var(--text-3);display:block;}
.stat-value{display:block;font-size:22px;font-weight:700;color:var(--cyan-light);margin:8px 0 6px;font-family:"Inter",system-ui,sans-serif;}
.stat-note{font-size:13px;color:var(--text-2);line-height:1.7;}

/* ---------- 案例 Bento ---------- */
.bento{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:56px;}
.bento-item{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);min-height:260px;
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  display:block;
}
.bento-item:first-child{grid-column:span 2;min-height:340px;}
.bento-item img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.2,.7,.3,1);}
.bento-item:hover{transform:translateY(-4px);border-color:var(--cyan-line);box-shadow:0 24px 60px -24px rgba(0,0,0,.85);}
.bento-item:hover img{transform:scale(1.03);}
.bento-veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,13,21,.15) 0%,rgba(6,13,21,.55) 52%,rgba(6,13,21,.92) 100%);
}
.bento-body{position:absolute;left:0;right:0;bottom:0;padding:26px 28px;}
.bento-tag{
  display:inline-block;padding:5px 13px;border-radius:999px;font-size:12px;letter-spacing:.04em;
  color:var(--cyan-light);border:1px solid var(--cyan-line);
  background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.03));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.bento-body h3{font-size:19px;font-weight:600;margin-top:14px;line-height:1.5;}
.bento-body p{font-size:14px;color:var(--text-2);margin-top:8px;line-height:1.8;max-width:620px;}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:1fr 2fr;gap:56px;align-items:start;}
.faq-left{position:sticky;top:110px;}
.faq-left .tip{color:var(--text-2);font-size:14.5px;margin-top:16px;}
.faq-accordion .accordion-item{
  background:transparent;border:none;border-bottom:1px solid var(--line);border-radius:0;
}
.faq-accordion .accordion-button{
  background:transparent;color:var(--text);font-size:16.5px;font-weight:600;
  padding:22px 8px 22px 0;box-shadow:none;display:flex;align-items:center;gap:16px;
  transition:all var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--cyan-light);box-shadow:inset 3px 0 0 var(--cyan);padding-left:14px;
}
.faq-accordion .accordion-button:hover{color:var(--cyan-light);}
.faq-accordion .accordion-button:focus{box-shadow:inset 0 0 0 2px var(--cyan);outline:none;}
.faq-accordion .accordion-button::after{display:none;}
.faq-accordion .plus{position:relative;width:15px;height:15px;flex:0 0 15px;margin-left:auto;}
.faq-accordion .plus::before,
.faq-accordion .plus::after{
  content:"";position:absolute;background:var(--cyan);transition:transform var(--ease),opacity var(--ease);
}
.faq-accordion .plus::before{left:0;top:6.5px;width:15px;height:1.5px;}
.faq-accordion .plus::after{left:6.5px;top:0;width:1.5px;height:15px;}
.faq-accordion .accordion-button:not(.collapsed) .plus::after{transform:rotate(90deg);opacity:0;}
.faq-accordion .accordion-body{padding:0 40px 26px 0;color:var(--text-2);font-size:14.5px;line-height:1.85;}

/* ---------- 开通面板 ---------- */
.activate-panel{
  border-radius:var(--r-panel);border:1px solid rgba(255,255,255,.10);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  background-color:rgba(15,30,44,.72);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow);padding:48px;display:grid;grid-template-columns:1fr 1fr;gap:56px;
}
.act-list{margin-top:26px;display:grid;gap:14px;}
.act-list li{display:flex;gap:12px;font-size:14.5px;color:var(--text-2);line-height:1.8;}
.act-list li::before{
  content:"";width:16px;height:16px;flex:0 0 16px;margin-top:6px;border-radius:50%;
  border:1px solid var(--cyan-line);background:rgba(47,212,200,.14);
  box-shadow:inset 0 0 0 3px rgba(6,13,21,.9);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:9px;letter-spacing:.02em;}
.field input,.field textarea{
  width:100%;background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:12px;color:var(--text);font-size:15px;padding:13px 16px;
  transition:all var(--ease);font-family:inherit;line-height:1.6;
}
.field textarea{min-height:96px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(47,212,200,.16);background:rgba(255,255,255,.06);
}
.form-note{font-size:13px;color:var(--text-3);line-height:1.75;margin-top:16px;}

/* ---------- 资讯列表 ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.news-more{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);
  border-bottom:1px solid var(--line);padding-bottom:4px;
}
.news-more:hover{color:var(--cyan-light);border-bottom-color:var(--cyan-line);}
.news-list{margin-top:40px;border-top:1px solid var(--line);}
.news-row{
  display:grid;grid-template-columns:200px minmax(0,1fr) 190px;gap:28px;align-items:center;
  padding:24px 16px 24px 0;border-bottom:1px solid var(--line);position:relative;
  transition:background var(--ease);
}
.news-row::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--cyan);
  transform:scaleY(0);transition:transform var(--ease);transform-origin:center;
}
.news-row:hover{background:rgba(255,255,255,.03);}
.news-row:hover::before{transform:scaleY(1);}
.news-thumb{
  aspect-ratio:16/10;border-radius:12px;overflow:hidden;background:var(--ink-700);
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.2,.7,.3,1);}
.news-row:hover .news-thumb img{transform:scale(1.04);}
.news-body h3{font-size:17.5px;font-weight:600;line-height:1.55;}
.news-body p{
  font-size:14px;color:var(--text-2);margin-top:8px;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;flex-direction:column;align-items:flex-end;gap:10px;}
.pill{
  display:inline-block;padding:4px 13px;border-radius:999px;font-size:12px;letter-spacing:.04em;
  color:var(--cyan-light);border:1px solid var(--cyan-line);background:rgba(47,212,200,.08);
}
.news-meta time{font-size:13px;color:var(--text-3);font-family:"Inter",system-ui,sans-serif;}
.news-empty{
  margin-top:36px;padding:56px 24px;text-align:center;
  border:1px dashed var(--line-hover);border-radius:var(--r-card);
}
.news-empty p{color:var(--text-3);font-size:15px;margin-bottom:20px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:0;}
.footer-brand{padding-right:36px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:13.5px;color:var(--text-3);line-height:1.85;max-width:300px;}
.footer-col{padding:0 32px;border-left:1px solid var(--line);}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);letter-spacing:.04em;margin-bottom:18px;}
.footer-col a{display:block;font-size:13.5px;color:var(--text-3);padding:6px 0;}
.footer-col a:hover{color:var(--cyan-light);}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom .fb-links{display:flex;flex-wrap:wrap;gap:20px;}

@media (max-width:1199px){
  .hero-inner{grid-template-columns:1fr;}
  .hero-side{display:none;}
  .hero-copy{max-width:700px;}
  .cap-left{padding:36px 32px;}
  .cap-right{padding:36px 32px;border-left:none;border-top:1px solid var(--line);flex-direction:row;}
  .cap-right .stat-card{flex:1;}
}
@media (max-width:991px){
  .section{padding:64px 0;}
  .hero{height:auto;min-height:0;padding:132px 0 64px;}
  .steps{grid-template-columns:1fr;gap:0;margin-top:40px;}
  .step{padding:26px 0 26px 44px;border-left:1px solid var(--line);}
  .step:first-child{padding-left:44px;}
  .step:last-child{padding-right:0;}
  .step-line{display:none;}
  .step-num{position:absolute;left:-21px;top:26px;}
  .step p{max-width:none;}
  .cap-row{grid-template-columns:1fr;gap:6px;}
  .bento{grid-template-columns:1fr;}
  .bento-item:first-child{grid-column:span 1;min-height:280px;}
  .faq-wrap{grid-template-columns:1fr;gap:32px;}
  .faq-left{position:static;}
  .activate-panel{grid-template-columns:1fr;gap:36px;padding:36px 28px;}
  .news-row{grid-template-columns:160px minmax(0,1fr);gap:20px;}
  .news-row:nth-child(n+5){display:none;}
  .news-meta{grid-column:2;flex-direction:row;align-items:center;justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px 0;}
  .footer-brand{padding-right:0;grid-column:span 2;}
  .footer-col{padding:0 24px;}
  .footer-col:nth-child(2){border-left:none;padding-left:0;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding-left:18px;padding-right:18px;}
  .section{padding:48px 0;}
  .hero{padding:112px 0 52px;}
  .hero-cta{gap:12px;}
  .hero-cta .btn-glow,.hero-cta .btn-ghost{flex:1 1 100%;}
  .cap-right{flex-direction:column;}
  .news-row{grid-template-columns:110px minmax(0,1fr);gap:16px;padding:20px 8px 20px 0;}
  .news-row:nth-child(n+4){display:none;}
  .news-body h3{font-size:16px;}
  .news-body p{-webkit-line-clamp:2;}
  .news-meta{grid-column:1 / -1;flex-direction:row;align-items:center;gap:14px;}
  .news-more{display:none;}
  .news-more-mobile{display:inline-flex;width:100%;margin-top:28px;}
  .activate-panel{padding:28px 20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-brand{grid-column:span 1;padding-bottom:8px;}
  .footer-col{padding:0;border-left:none;border-top:1px solid var(--line);padding-top:24px;}
  .footer-bottom{justify-content:flex-start;}
}
@media (max-width:420px){
  .hero h1{font-size:28px;}
  .brand-sub{display:none;}
  .news-row{grid-template-columns:1fr;}
  .news-thumb{aspect-ratio:16/9;}
}
.news-more-mobile{display:none;}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .bento-item:hover,.btn-glow:hover,.btn-ghost:hover,.btn-gold:hover,.stat-card:hover{transform:none;}
  .bento-item:hover img,.news-row:hover .news-thumb img{transform:none;}
}

/* roulang page: article */
:root{
  --ink-900:#060D15;--ink-800:#0A141F;--ink-700:#0F1E2C;--ink-600:#16293A;
  --cy:#2FD4C8;--cy-d:#14A79E;--cy-l:#7FEAE0;--gold:#EFB25C;--warn:#F2705C;
  --tx:#EAF2F8;--tx-2:#9FB3C4;--tx-3:#6B8095;
  --line:rgba(255,255,255,.08);--line-2:rgba(255,255,255,.16);--cy-line:rgba(47,212,200,.35);
  --r-card:18px;--r-panel:24px;--r-btn:12px;--r-pill:999px;
  --sh:0 20px 50px -20px rgba(0,0,0,.75),inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--ink-900);--bs-body-color:var(--tx);--bs-primary:var(--cy);--bs-primary-rgb:47,212,200;
  --bs-border-color:rgba(255,255,255,.08);--bs-border-radius:12px;--bs-border-radius-lg:18px;
  --bs-link-color:var(--cy-l);--bs-link-hover-color:var(--cy);--bs-link-decoration:none;
  --bs-font-sans-serif:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --bs-body-font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--ink-900);color:var(--tx);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(60% 46% at 82% 4%,rgba(47,212,200,.10),transparent 62%),
             radial-gradient(42% 34% at 4% 92%,rgba(239,178,92,.06),transparent 68%);
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease),border-color .24s var(--ease),background-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease)}
a:hover{color:var(--cy-l)}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--cy);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{position:relative;z-index:1;padding:96px 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;color:var(--cy-l);
  padding:6px 14px;border-radius:var(--r-pill);border:1px solid var(--cy-line);background:rgba(47,212,200,.07)}
.eyebrow::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--cy);box-shadow:0 0 10px rgba(47,212,200,.8)}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.sec-head h2{margin:0;font-size:clamp(24px,2.4vw,30px);font-weight:700;line-height:1.35}
.sec-head p{margin:8px 0 0;font-size:14.5px;color:var(--tx-3);max-width:640px}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--tx-2);padding-bottom:4px;border-bottom:1px solid var(--line-2)}
.text-link .arrow{transition:transform .24s var(--ease)}
.text-link:hover{color:var(--cy-l);border-color:var(--cy-line)}
.text-link:hover .arrow{transform:translateX(4px)}

/* ============ header / nav ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1030;border-bottom:1px solid transparent;
  transition:background-color .3s var(--ease),backdrop-filter .3s var(--ease),border-color .3s var(--ease)}
.site-header.is-scrolled{background:rgba(6,13,21,.78);backdrop-filter:blur(14px) saturate(140%);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:inline-flex;flex-direction:column;line-height:1.06}
.brand-mark{font-size:20px;font-weight:700;letter-spacing:.02em;color:var(--tx)}
.brand-sub{font-size:11px;letter-spacing:.14em;color:var(--tx-3);margin-top:3px}
.brand:hover .brand-sub{color:var(--cy-l)}
.nav-links{align-items:center;gap:20px}
.nav-link{position:relative;padding:6px 2px;font-size:14.5px;letter-spacing:.02em;color:var(--tx-2)}
.nav-link::after{content:"";position:absolute;left:50%;right:50%;bottom:-2px;height:1px;background:var(--cy);
  transition:left .24s var(--ease),right .24s var(--ease)}
.nav-link:hover{color:var(--tx)}
.nav-link:hover::after{left:0;right:0}
.nav-link.is-active{color:var(--tx)}
.nav-link.is-active::before{content:"";position:absolute;left:-11px;top:50%;width:4px;height:4px;border-radius:50%;
  background:var(--cy);transform:translateY(-50%);box-shadow:0 0 8px rgba(47,212,200,.9)}
.nav-link.is-active::after{left:0;right:58%;height:2px;border-radius:2px}
.nav-sep{width:1px;height:12px;background:var(--line-2)}
.header-actions{display:flex;align-items:center;gap:12px}
.btn-glow,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:38px;padding:0 20px;
  border-radius:var(--r-pill);font-size:14px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:color .24s var(--ease),background-color .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease)}
.btn-glow{color:var(--cy-l);border:1px solid var(--cy-line);
  background-color:rgba(47,212,200,.07);background-image:linear-gradient(160deg,rgba(47,212,200,.18),rgba(47,212,200,.04))}
.btn-glow:hover{color:#04121A;background-image:linear-gradient(135deg,var(--cy-l),var(--cy));
  box-shadow:0 0 0 1px rgba(47,212,200,.5),0 10px 34px -8px rgba(47,212,200,.55)}
.btn-glow:active{transform:translateY(1px)}
.btn-ghost{color:var(--tx-2);border:1px solid var(--line-2);background-color:transparent}
.btn-ghost:hover{color:var(--tx);border-color:var(--cy-line);background-color:rgba(47,212,200,.06)}
.btn-ghost:active{transform:translateY(1px)}
.nav-toggle{width:40px;height:40px;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid var(--line-2);border-radius:12px;background-color:transparent;padding:0}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--tx-2);border-radius:2px;transition:background-color .24s var(--ease),transform .24s var(--ease)}
.nav-toggle:hover span{background:var(--cy-l)}
.mobile-nav{background:var(--ink-900);color:var(--tx);border-left:1px solid var(--line);width:100%;max-width:420px}
.mobile-nav .offcanvas-header{padding:20px 22px;border-bottom:1px solid var(--line);align-items:center}
.mobile-nav .btn-close-mobile{width:36px;height:36px;border-radius:10px;border:1px solid var(--line-2);background:transparent;
  color:var(--tx-2);font-size:18px;line-height:1;display:inline-flex;align-items:center;justify-content:center}
.mobile-nav .btn-close-mobile:hover{color:var(--cy-l);border-color:var(--cy-line)}
.mobile-nav .offcanvas-body{padding:8px 22px 24px;display:flex;flex-direction:column}
.m-link{padding:18px 0;font-size:16px;color:var(--tx-2);border-bottom:1px solid var(--line)}
.m-link:hover{color:var(--cy-l)}

/* ============ article hero ============ */
.article-hero{position:relative;z-index:1;padding:150px 0 56px;overflow:hidden;
  background-color:var(--ink-900);
  background-image:linear-gradient(180deg,rgba(6,13,21,.94) 0%,rgba(6,13,21,.86) 42%,var(--ink-900) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center}
.article-hero::after{content:"";position:absolute;inset:-10% -6% auto auto;width:640px;height:640px;pointer-events:none;
  background:radial-gradient(circle,rgba(47,212,200,.16),transparent 62%)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--tx-3);margin-bottom:28px;position:relative;z-index:1}
.crumb a{color:var(--tx-3)}
.crumb a:hover{color:var(--cy-l)}
.crumb .sep{color:rgba(255,255,255,.22)}
.crumb .cur{color:var(--tx-2);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{position:relative;z-index:1;max-width:860px}
.article-head h1{margin:0;font-size:clamp(28px,3.5vw,42px);line-height:1.35;font-weight:700;
  letter-spacing:-.01em;color:var(--tx)}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px;font-size:13px;color:var(--tx-3)}
.pill{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:var(--r-pill);
  border:1px solid var(--cy-line);background-color:rgba(47,212,200,.08);color:var(--cy-l);font-size:12.5px;font-weight:500}
.meta-sep{width:1px;height:12px;background:var(--line-2)}

/* ============ article layout ============ */
.article-section{padding-top:56px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px}
.article-main{max-width:800px;width:100%;margin:0 auto;min-width:0}
.article-cover{position:relative;margin:0 0 44px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh)}
.article-cover img{width:100%;aspect-ratio:21/9;object-fit:cover}
.article-cover::after{content:"";position:absolute;inset:auto 0 0;height:52%;
  background:linear-gradient(180deg,transparent,rgba(6,13,21,.72))}
.article-cover figcaption{position:absolute;left:20px;bottom:16px;z-index:2;font-size:12.5px;color:var(--tx-2);
  padding:5px 12px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.14);background-color:rgba(6,13,21,.5);backdrop-filter:blur(10px)}
.article-body{font-size:16.5px;line-height:1.9;color:var(--tx-2);max-width:800px;overflow-wrap:break-word}
.article-body>*+*{margin-top:1.4em}
.article-body p{margin:0}
.article-body h2{position:relative;margin:44px 0 16px;padding-left:15px;font-size:clamp(22px,2.2vw,28px);line-height:1.35;
  font-weight:700;color:var(--tx);scroll-margin-top:104px}
.article-body h2::before{content:"";position:absolute;left:0;top:.26em;bottom:.26em;width:3px;border-radius:2px;background:var(--cy)}
.article-body h3{margin:32px 0 12px;font-size:21px;line-height:1.45;font-weight:600;color:var(--tx);scroll-margin-top:104px}
.article-body h4{margin:24px 0 10px;font-size:17px;font-weight:600;color:var(--tx)}
.article-body strong,.article-body b{color:var(--tx);font-weight:600}
.article-body a{color:var(--cy-l);border-bottom:1px solid var(--cy-line)}
.article-body a:hover{color:var(--cy)}
.article-body img{border-radius:12px;margin:32px auto}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0}
.article-body li{margin:.4em 0}
.article-body li::marker{color:var(--cy)}
.article-body blockquote{margin:32px 0;padding:18px 22px;border-left:3px solid var(--cy);border-radius:0 12px 12px 0;
  background-color:rgba(255,255,255,.03);color:var(--tx-2)}
.article-body blockquote p{margin:0}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:32px 0;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.article-body th{background-color:var(--ink-700);color:var(--tx);font-weight:600;white-space:nowrap}
.article-body pre{background-color:var(--ink-800);border:1px solid var(--line);border-radius:12px;padding:18px;
  overflow-x:auto;font-size:14px;line-height:1.7}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;color:var(--cy-l)}
.article-body pre code{color:var(--tx-2)}
.article-body figure{margin:32px 0}
.article-body figcaption{font-size:13px;color:var(--tx-3);text-align:center;margin-top:10px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* toc */
.article-toc{display:none}
.toc-inner{position:sticky;top:104px}
.toc-title{margin:0 0 14px;font-size:12.5px;font-weight:600;letter-spacing:.14em;color:var(--tx-3)}
.toc-list{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.toc-list a{display:block;margin-left:-1px;padding:7px 0 7px 14px;font-size:13.5px;line-height:1.6;color:var(--tx-2);
  border-left:2px solid transparent;border-radius:0 6px 6px 0}
.toc-list a:hover{color:var(--tx);background-color:rgba(255,255,255,.03)}
.toc-list a.is-current{color:var(--cy-l);border-left-color:var(--cy)}

/* empty state */
.empty-box{border:1px dashed var(--line-2);border-radius:var(--r-panel);background-color:rgba(255,255,255,.02);
  padding:64px 24px;text-align:center}
.empty-box .eb-icon{width:56px;height:56px;margin:0 auto 18px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--cy-line);background-color:rgba(47,212,200,.08);color:var(--cy-l);font-size:24px}
.empty-box h2{margin:0 0 10px;font-size:22px;font-weight:600;color:var(--tx)}
.empty-box p{margin:0 0 24px;font-size:14.5px;color:var(--tx-3)}

/* ============ related ============ */
.related-sec{background-color:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rel-card{display:flex;flex-direction:column;gap:14px;padding:24px;border:1px solid var(--line);border-radius:var(--r-card);
  background-color:rgba(255,255,255,.02);background-image:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.01))}
.rel-card h3{margin:0;font-size:17px;line-height:1.55;font-weight:600;color:var(--tx);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card .rel-meta{margin:auto 0 0;font-size:13px;color:var(--tx-3)}
.rel-card:hover{transform:translateY(-4px);border-color:var(--cy-line);box-shadow:var(--sh)}
.rel-card:hover h3{color:var(--cy-l)}
.tag{display:inline-flex;align-items:center;align-self:flex-start;padding:4px 11px;border-radius:var(--r-pill);font-size:12px;
  letter-spacing:.04em;color:var(--gold);border:1px solid rgba(239,178,92,.35);background-color:rgba(239,178,92,.08)}

/* ============ return / cta ============ */
.back-panel{display:grid;grid-template-columns:1.5fr auto;gap:32px;align-items:center;padding:40px;border-radius:var(--r-panel);
  border:1px solid var(--line);background-color:var(--ink-700);
  background-image:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  backdrop-filter:blur(18px) saturate(140%);box-shadow:var(--sh)}
.back-panel h2{margin:0 0 10px;font-size:clamp(20px,2.1vw,26px);font-weight:700;line-height:1.4}
.back-panel p{margin:0;font-size:14.5px;color:var(--tx-3);max-width:560px}
.back-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ footer ============ */
.site-footer{position:relative;z-index:1;margin-top:0;padding:64px 0 28px;background-color:var(--ink-800);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px}
.footer-brand .brand{margin-bottom:0}
.footer-brand p{margin:16px 0 0;max-width:330px;font-size:13.5px;line-height:1.85;color:var(--tx-3)}
.footer-col{padding-left:32px;border-left:1px solid var(--line)}
.footer-col h4{margin:0 0 16px;font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--tx-3)}
.footer-col a{display:block;padding:6px 0;font-size:14px;color:var(--tx-2)}
.footer-col a:hover{color:var(--cy-l)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:48px;
  padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--tx-3)}
.fb-links{display:flex;flex-wrap:wrap;gap:18px}
.fb-links a{color:var(--tx-3)}
.fb-links a:hover{color:var(--cy-l)}

/* ============ responsive ============ */
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,800px) 220px;justify-content:center;gap:56px}
  .article-toc{display:block}
  .article-main{margin:0}
}
@media (max-width:1199px){
  .article-main{margin:0 auto}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .article-hero{padding:130px 0 44px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-col{padding-left:0;border-left:0}
  .back-panel{grid-template-columns:1fr;padding:32px}
  .back-actions{justify-content:flex-start}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .container{padding:0 18px}
  .article-hero{padding:118px 0 36px}
  .article-cover img{aspect-ratio:16/10}
  .article-body{font-size:16px}
  .rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:420px){
  .brand-mark{font-size:18px}
  .brand-sub{font-size:10px;letter-spacing:.1em}
  .btn-glow,.btn-ghost{height:36px;padding:0 16px;font-size:13.5px}
  .article-head h1{font-size:26px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .rel-card:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --ink-900:#060D15;
  --ink-800:#0A141F;
  --ink-700:#0F1E2C;
  --ink-600:#16293A;
  --cyan:#2FD4C8;
  --cyan-deep:#14A79E;
  --cyan-light:#7FEAE0;
  --gold:#EFB25C;
  --warn:#F2705C;
  --text:#EAF2F8;
  --text-2:#9FB3C4;
  --text-3:#6B8095;
  --line:rgba(255,255,255,.08);
  --line-hover:rgba(255,255,255,.16);
  --cyan-line:rgba(47,212,200,.35);
  --gold-line:rgba(239,178,92,.38);
  --r-card:18px;
  --r-panel:24px;
  --r-btn:12px;
  --r-pill:999px;
  --shadow:0 20px 50px -20px rgba(0,0,0,.75);
  --shadow-in:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:240ms cubic-bezier(.2,.7,.3,1);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "Inter", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;

  --bs-body-bg:var(--ink-900);
  --bs-body-color:var(--text);
  --bs-primary:#2FD4C8;
  --bs-primary-rgb:47,212,200;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-border-radius:12px;
  --bs-link-color:#7FEAE0;
  --bs-link-hover-color:#2FD4C8;
  --bs-font-sans-serif:var(--font);
  --bs-body-font-family:var(--font);
  --bs-emphasis-color:var(--text);
  --bs-secondary-color:var(--text-2);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--cyan-light);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--cyan)}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.35;color:var(--text)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}

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

::selection{background:rgba(47,212,200,.28)}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1030;
  height:68px;
  display:flex;
  align-items:center;
  background:transparent;
  transition:background var(--ease), backdrop-filter var(--ease), border-color var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(6,13,21,.78);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  width:100%;
}
.brand{
  display:flex;
  flex-direction:column;
  line-height:1.1;
  text-decoration:none;
  flex-shrink:0;
}
.brand-mark{
  font-size:19px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--text);
}
.brand-sub{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--text-3);
  margin-top:2px;
}
.brand:hover .brand-mark{color:var(--cyan-light)}

.nav-links{
  align-items:center;
  gap:20px;
  margin-left:auto;
  margin-right:20px;
}
.nav-sep{
  width:1px;
  height:14px;
  background:var(--line-hover);
  display:inline-block;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:15px;
  letter-spacing:.02em;
  color:var(--text-2);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  right:50%;
  bottom:0;
  height:1px;
  background:var(--cyan);
  transition:left var(--ease), right var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{left:0;right:0}
.nav-link.is-active{
  color:var(--text);
  padding-left:14px;
  padding-right:6px;
}
.nav-link.is-active::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:4px;height:4px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(47,212,200,.8);
}
.nav-link.is-active::after{
  left:14px;
  right:auto;
  width:22px;
  height:2px;
  border-radius:2px;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
}
.menu-toggle{
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid var(--line-hover);
  background:rgba(255,255,255,.03);
  color:var(--text);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:border-color var(--ease), color var(--ease);
}
.menu-toggle:hover{border-color:var(--cyan-line);color:var(--cyan-light)}

/* ---------- buttons ---------- */
.btn-glow,
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--ease), box-shadow var(--ease), border-color var(--ease), color var(--ease), background var(--ease);
  text-decoration:none;
  white-space:nowrap;
}
.btn-glow{
  background:linear-gradient(135deg,#2FD4C8 0%,#14A79E 100%);
  color:#04171A;
  box-shadow:0 10px 30px -16px rgba(47,212,200,.7);
}
.btn-glow:hover{
  color:#04171A;
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(47,212,200,.5), 0 10px 34px -8px rgba(47,212,200,.55);
}
.btn-glow:active{transform:translateY(0)}
.btn-ghost{
  background:transparent;
  border-color:var(--line-hover);
  color:var(--text);
}
.btn-ghost:hover{
  border-color:var(--cyan-line);
  color:var(--cyan-light);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0)}
.btn-sm-cta{
  height:38px;
  padding:0 18px;
  border-radius:var(--r-pill);
  font-size:14px;
}
.btn-glow:disabled,
.btn-ghost:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- offcanvas ---------- */
.offcanvas.mobile-nav{
  background:var(--ink-900);
  color:var(--text);
  width:min(88vw,380px);
  border-left:1px solid var(--line);
}
.mobile-nav .offcanvas-header{
  padding:20px 22px;
  border-bottom:1px solid var(--line);
  background:linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02)), var(--ink-800);
}
.mobile-nav .offcanvas-body{
  padding:0;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
}
.m-link{
  display:block;
  padding:20px 22px;
  font-size:17px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.m-link:hover{color:var(--text);background:rgba(255,255,255,.03)}
.m-link.is-active{color:var(--cyan-light);border-left:3px solid var(--cyan);padding-left:19px}
.mobile-nav .m-cta{padding:22px}
.mobile-nav .m-cta .btn-glow{width:100%}
.btn-close-x{
  background:transparent;
  border:1px solid var(--line-hover);
  color:var(--text);
  width:36px;height:36px;
  border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
}

/* ---------- sections ---------- */
.sec{
  position:relative;
  padding:96px 0;
}
.sec-tight{padding:72px 0}
.sec-alt{background:var(--ink-800)}
.sec-head{max-width:780px;margin-bottom:48px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--cyan-light);
  padding:5px 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--cyan-line);
  background:rgba(47,212,200,.06);
  margin-bottom:18px;
}
.eyebrow.is-gold{
  color:var(--gold);
  border-color:var(--gold-line);
  background:rgba(239,178,92,.07);
}
.sec-title{
  font-size:clamp(24px,2.6vw,32px);
  line-height:1.35;
  margin-bottom:16px;
}
.sec-desc{
  font-size:16px;
  color:var(--text-2);
  max-width:720px;
}
.grad-text{
  background:linear-gradient(96deg,#7FEAE0 0%,#2FD4C8 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  padding:148px 0 80px;
  min-height:52vh;
  display:flex;
  align-items:center;
  overflow:hidden;
  background:var(--ink-900);
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(160deg, rgba(6,13,21,.95) 0%, rgba(6,13,21,.86) 45%, rgba(6,13,21,.96) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
}
.page-hero::after{
  content:"";
  position:absolute;
  left:-18%;
  bottom:-45%;
  width:78%;
  height:110%;
  background:radial-gradient(circle at 25% 80%, rgba(47,212,200,.20), rgba(47,212,200,0) 62%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.crumb{
  font-size:12.5px;
  color:var(--text-3);
  margin-bottom:22px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--cyan-light)}
.crumb span.sep{color:rgba(255,255,255,.18)}
.crumb .cur{color:var(--text-2)}

.page-hero h1{
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.25;
  letter-spacing:-.01em;
  margin-bottom:22px;
  max-width:620px;
}
.hero-lead{
  font-size:16.5px;
  color:var(--text-2);
  max-width:600px;
  margin-bottom:30px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:26px;
}
.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  font-size:13px;
  color:var(--text-3);
}
.hero-points span{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.hero-points span::before{
  content:"";
  width:5px;height:5px;
  border-radius:50%;
  background:var(--cyan);
  flex-shrink:0;
}

.hero-visual{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow), var(--shadow-in);
}
.hero-visual img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(6,13,21,.10) 0%, rgba(6,13,21,.72) 100%);
}
.glass-bar{
  position:absolute;
  left:16px;
  right:16px;
  bottom:16px;
  z-index:3;
  padding:16px 18px;
  border-radius:14px;
  background:linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02)), rgba(15,30,44,.92);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  border:1px solid rgba(255,255,255,.10);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}
.glass-bar strong{
  display:block;
  font-size:15px;
  font-weight:600;
}
.glass-bar em{
  font-style:normal;
  font-size:12.5px;
  color:var(--text-3);
}
.glass-tag{
  font-size:12px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  color:var(--cyan-light);
  border:1px solid var(--cyan-line);
  background:rgba(47,212,200,.08);
  white-space:nowrap;
}

/* ---------- feature stagger grid ---------- */
.stagger-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
  padding-bottom:36px;
}
.feature-card{
  position:relative;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:30px;
  box-shadow:var(--shadow), var(--shadow-in);
  transition:transform var(--ease), border-color var(--ease), background var(--ease);
  overflow:hidden;
}
.stagger-grid > .feature-card:nth-child(even){
  position:relative;
  top:32px;
}
.feature-card:hover{
  transform:translateY(-4px);
  border-color:var(--cyan-line);
  background:var(--ink-600);
}
.feature-card .f-icon{
  width:44px;height:44px;
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  color:var(--cyan);
  border:1px solid var(--cyan-line);
  background:rgba(47,212,200,.07);
  margin-bottom:18px;
}
.feature-card h3{
  font-size:20px;
  margin-bottom:12px;
}
.feature-card p{
  font-size:15px;
  color:var(--text-2);
  margin-bottom:16px;
}
.f-list li{
  position:relative;
  padding-left:18px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.9;
}
.f-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.85em;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--cyan);
  opacity:.75;
}
.feature-card .f-img{
  margin:-30px -30px 22px;
  border-bottom:1px solid var(--line);
}
.feature-card .f-img img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}

/* ---------- steps list ---------- */
.step-list{
  border-top:1px solid var(--line);
}
.step-item{
  position:relative;
  display:grid;
  grid-template-columns:96px 1fr;
  gap:28px;
  padding:28px 0 28px 22px;
  border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.step-item::before{
  content:"";
  position:absolute;
  left:0;top:22px;bottom:22px;
  width:2px;
  background:transparent;
  transition:background var(--ease);
}
.step-item:hover{background:rgba(255,255,255,.03)}
.step-item:hover::before{background:var(--cyan)}
.step-num{
  font-family:var(--font-num);
  font-size:34px;
  font-weight:300;
  line-height:1;
  color:var(--gold);
  letter-spacing:.02em;
  padding-top:4px;
}
.step-body h3{
  font-size:19px;
  margin-bottom:8px;
}
.step-body p{
  font-size:15px;
  color:var(--text-2);
  max-width:720px;
}

/* ---------- metrics ---------- */
.metrics-grid{
  display:grid;
  grid-template-columns:.85fr 1.15fr;
  gap:56px;
  align-items:start;
}
.metric-rows{
  border-top:1px solid var(--line);
}
.metric-row{
  display:grid;
  grid-template-columns:150px 1fr;
  gap:22px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.metric-row:hover{background:rgba(255,255,255,.03)}
.metric-row dt{
  font-size:13.5px;
  color:var(--text-3);
  letter-spacing:.06em;
}
.metric-row dd{
  margin:0;
  font-size:16px;
  color:var(--text);
  font-weight:600;
}
.metric-row dd small{
  display:block;
  font-weight:400;
  font-size:14px;
  color:var(--text-2);
  margin-top:4px;
  line-height:1.8;
}
.wide-banner{
  position:relative;
  margin-top:56px;
  border-radius:var(--r-panel);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.wide-banner img{
  width:100%;
  height:280px;
  object-fit:cover;
}
.wide-banner .banner-mask{
  position:absolute;
  inset:0;
  background:linear-gradient(90deg, rgba(6,13,21,.92) 0%, rgba(6,13,21,.55) 55%, rgba(6,13,21,.15) 100%);
}
.wide-banner .banner-text{
  position:absolute;
  inset:0;
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:0 48px;
  max-width:640px;
}
.wide-banner .banner-text h3{
  font-size:22px;
  margin-bottom:10px;
}
.wide-banner .banner-text p{
  font-size:15px;
  color:var(--text-2);
}

/* ---------- FAQ ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:1fr 2fr;
  gap:56px;
  align-items:start;
}
.faq-aside{
  position:sticky;
  top:96px;
}
.faq-aside .short{
  font-size:15px;
  color:var(--text-2);
  margin-top:14px;
  padding-left:14px;
  border-left:2px solid var(--cyan-line);
}
.faq-accordion .accordion-item{
  position:relative;
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
  border-radius:0;
}
.faq-accordion .accordion-item:first-child{border-top:1px solid var(--line)}
.faq-accordion .accordion-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:transparent;
  transition:background var(--ease);
}
.faq-accordion .accordion-item:has(.accordion-button:not(.collapsed))::before{
  background:var(--cyan);
}
.faq-accordion .accordion-header{margin:0}
.faq-accordion .accordion-button{
  position:relative;
  width:100%;
  background:transparent;
  border:0;
  box-shadow:none!important;
  color:var(--text);
  font-size:16.5px;
  font-weight:600;
  text-align:left;
  padding:22px 46px 22px 18px;
  line-height:1.6;
  transition:color var(--ease);
}
.faq-accordion .accordion-button::after{display:none}
.faq-accordion .accordion-button::before{
  content:"+";
  position:absolute;
  right:18px;
  top:50%;
  transform:translateY(-50%);
  font-size:22px;
  font-weight:300;
  color:var(--text-3);
  transition:transform var(--ease), color var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--cyan-light);
}
.faq-accordion .accordion-button:not(.collapsed)::before{
  content:"×";
  color:var(--cyan);
  transform:translateY(-50%) rotate(180deg);
}
.faq-accordion .accordion-body{
  padding:0 46px 24px 18px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* ---------- CTA panel ---------- */
.cta-panel{
  position:relative;
  border-radius:var(--r-panel);
  padding:48px;
  background:linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02)), rgba(15,30,44,.94);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:var(--shadow), var(--shadow-in);
  overflow:hidden;
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-15%;
  top:-40%;
  width:55%;
  height:140%;
  background:radial-gradient(circle at 60% 40%, rgba(47,212,200,.16), rgba(47,212,200,0) 62%);
  pointer-events:none;
}
.cta-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:start;
}
.cta-grid h2{
  font-size:clamp(22px,2.4vw,28px);
  margin-bottom:14px;
}
.cta-grid .cta-note{
  font-size:15px;
  color:var(--text-2);
  margin-bottom:22px;
}
.cta-checks li{
  position:relative;
  padding-left:24px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.9;
}
.cta-checks li i{
  position:absolute;
  left:0;
  top:.5em;
  font-size:12px;
  color:var(--cyan);
}
.form-field{margin-bottom:16px}
.form-field label{
  display:block;
  font-size:13.5px;
  color:var(--text-2);
  margin-bottom:8px;
  letter-spacing:.02em;
}
.form-field input,
.form-field textarea{
  width:100%;
  height:50px;
  padding:0 16px;
  border-radius:var(--r-btn);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line-hover);
  color:var(--text);
  font-size:15px;
  transition:border-color var(--ease), box-shadow var(--ease), background var(--ease);
}
.form-field textarea{
  height:104px;
  padding:14px 16px;
  resize:vertical;
  line-height:1.75;
}
.form-field input::placeholder,
.form-field textarea::placeholder{color:var(--text-3)}
.form-field input:hover,
.form-field textarea:hover{border-color:rgba(255,255,255,.26)}
.form-field input:focus,
.form-field textarea:focus{
  outline:none;
  border-color:var(--cyan);
  background:rgba(255,255,255,.06);
  box-shadow:0 0 0 3px rgba(47,212,200,.16);
}
.form-field input:disabled,
.form-field textarea:disabled{opacity:.5;cursor:not-allowed}
.cta-form .btn-glow{width:100%;margin-top:8px}
.form-tip{
  margin-top:14px;
  font-size:13px;
  color:var(--text-3);
  line-height:1.8;
}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-800);
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:0;
}
.footer-grid > div{
  padding:0 28px;
  border-left:1px solid var(--line);
}
.footer-grid > div:first-child{
  padding-left:0;
  border-left:0;
}
.footer-grid > div:last-child{padding-right:0}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{
  font-size:14px;
  color:var(--text-3);
  line-height:1.9;
  max-width:340px;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  margin-bottom:16px;
  letter-spacing:.04em;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:var(--text-3);
  padding:5px 0;
}
.footer-col a:hover{color:var(--cyan-light)}
.footer-bottom{
  margin-top:48px;
  border-top:1px solid var(--line);
  padding:22px 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom .fb-links{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
}
.footer-bottom a{color:var(--text-3);font-size:13px}
.footer-bottom a:hover{color:var(--cyan-light)}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .hero-grid{gap:40px}
  .metrics-grid{gap:40px}
  .faq-grid{gap:36px}
}
@media (max-width:991.98px){
  .sec{padding:64px 0}
  .sec-tight{padding:52px 0}
  .sec-head{margin-bottom:36px}
  .page-hero{padding:120px 0 64px;min-height:auto}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{max-width:560px}
  .stagger-grid{grid-template-columns:1fr;gap:20px;padding-bottom:0}
  .stagger-grid > .feature-card:nth-child(even){top:0}
  .metrics-grid{grid-template-columns:1fr;gap:32px}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .faq-aside{position:static}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .cta-panel{padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 0}
  .footer-grid > div{padding:0 20px}
  .footer-grid > div:nth-child(odd){padding-left:0;border-left:0}
  .footer-grid > div:nth-child(even){padding-right:0}
  .wide-banner .banner-text{padding:0 28px}
  .wide-banner img{height:240px}
}
@media (max-width:767.98px){
  body{font-size:15.5px}
  .container{padding-left:18px;padding-right:18px}
  .sec{padding:48px 0}
  .page-hero{padding:104px 0 52px}
  .page-hero h1{font-size:clamp(26px,7vw,34px)}
  .hero-lead{font-size:15.5px}
  .hero-actions{gap:12px}
  .hero-actions .btn-glow,
  .hero-actions .btn-ghost{width:100%}
  .feature-card{padding:24px}
  .feature-card .f-img{margin:-24px -24px 20px}
  .step-item{grid-template-columns:56px 1fr;gap:16px;padding:22px 0 22px 16px}
  .step-num{font-size:26px}
  .metric-row{grid-template-columns:1fr;gap:6px;padding:18px 0}
  .faq-accordion .accordion-button{padding:18px 40px 18px 14px;font-size:15.5px}
  .faq-accordion .accordion-body{padding:0 40px 20px 14px}
  .cta-panel{padding:24px}
  .wide-banner img{height:220px}
  .wide-banner .banner-text{padding:0 20px}
  .wide-banner .banner-text h3{font-size:18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-grid > div{padding:0;border-left:0}
  .footer-bottom{justify-content:flex-start}
}
@media (max-width:419.98px){
  .brand-mark{font-size:17px}
  .brand-sub{font-size:10px;letter-spacing:.12em}
  .glass-bar{flex-direction:column;align-items:flex-start;gap:8px}
  .eyebrow{font-size:11px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;animation-duration:.01ms!important}
  .feature-card:hover,
  .btn-glow:hover,
  .btn-ghost:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --ink-900:#060D15;
  --ink-800:#0A141F;
  --ink-700:#0F1E2C;
  --ink-600:#16293A;
  --cloud:#2FD4C8;
  --cloud-deep:#14A79E;
  --cloud-soft:#7FEAE0;
  --dawn:#EFB25C;
  --warn:#F2705C;
  --txt:#EAF2F8;
  --txt-2:#9FB3C4;
  --txt-3:#6B8095;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --cloud-line:rgba(47,212,200,.35);
  --gold-line:rgba(239,178,92,.38);
  --r-card:18px;
  --r-panel:24px;
  --r-btn:12px;
  --r-pill:999px;
  --shadow:0 20px 50px -20px rgba(0,0,0,.75);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:240ms cubic-bezier(.2,.7,.3,1);
  --bs-body-bg:var(--ink-900);
  --bs-body-color:var(--txt);
  --bs-primary:var(--cloud);
  --bs-border-color:var(--line);
  --bs-border-radius:18px;
  --bs-link-color:var(--cloud-soft);
  --bs-link-hover-color:var(--cloud);
  --bs-body-font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--txt);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--cloud-soft);text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease)}
a:hover{color:var(--cloud)}
p{margin:0 0 16px}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--txt)}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--cloud);outline-offset:3px;border-radius:4px}
.container{
  width:100%;
  max-width:1200px;
  padding-left:24px;
  padding-right:24px;
  margin-left:auto;
  margin-right:auto;
}
#capability,#flow,#materials,#faq,#apply{scroll-margin-top:92px}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1040;
  height:68px;
  display:flex;
  align-items:center;
  border-bottom:1px solid transparent;
  transition:background-color var(--ease),border-color var(--ease),backdrop-filter var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,13,21,.78);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}
.brand{display:inline-flex;flex-direction:column;line-height:1.15;color:var(--txt)}
.brand-mark{font-size:20px;font-weight:700;letter-spacing:.06em;color:var(--txt)}
.brand-sub{font-size:11px;letter-spacing:.16em;color:var(--txt-3);margin-top:2px}
.brand:hover .brand-mark{color:var(--cloud-soft)}
.nav-links{display:flex;align-items:center;gap:20px;margin:0}
.nav-sep{display:inline-block;width:1px;height:14px;background:var(--line-2)}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:15px;
  letter-spacing:.02em;
  color:var(--txt-2);
  border-radius:0;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;right:50%;bottom:0;
  height:1px;
  background:var(--cloud);
  transition:left var(--ease),right var(--ease),height var(--ease);
}
.nav-link:hover{color:var(--txt)}
.nav-link:hover::after{left:0;right:0}
.nav-link.is-active{color:var(--txt)}
.nav-link.is-active::after{left:0;right:0;height:2px;border-radius:2px}
.nav-link.is-active::before{
  content:"";
  position:absolute;
  left:-11px;top:50%;
  transform:translateY(-50%);
  width:4px;height:4px;
  border-radius:50%;
  background:var(--cloud);
}
.header-actions{display:flex;align-items:center;gap:14px}
.menu-toggle{
  width:42px;height:38px;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:6px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line-2);
  border-radius:var(--r-btn);
  cursor:pointer;
  transition:border-color var(--ease),background-color var(--ease);
}
.menu-toggle span{display:block;width:18px;height:1px;background:var(--txt-2);transition:background-color var(--ease)}
.menu-toggle:hover{border-color:var(--cloud-line);background:rgba(47,212,200,.08)}
.menu-toggle:hover span{background:var(--cloud-soft)}

/* 移动抽屉 */
.nav-drawer{
  --bs-offcanvas-width:min(88vw,360px);
  background:var(--ink-900);
  color:var(--txt);
  border-left:1px solid var(--line);
}
.nav-drawer .offcanvas-header{
  padding:18px 22px;
  border-bottom:1px solid var(--line);
  align-items:center;
}
.drawer-close{
  width:38px;height:38px;
  background:transparent;
  border:1px solid var(--line-2);
  border-radius:var(--r-btn);
  color:var(--txt-2);
  font-size:20px;
  line-height:1;
  cursor:pointer;
  transition:border-color var(--ease),color var(--ease);
}
.drawer-close:hover{border-color:var(--cloud-line);color:var(--cloud-soft)}
.nav-drawer .offcanvas-body{padding:8px 22px 22px}
.drawer-link{
  position:relative;
  display:block;
  padding:18px 0 18px 14px;
  font-size:17px;
  color:var(--txt-2);
  border-bottom:1px solid var(--line);
}
.drawer-link:hover{color:var(--txt)}
.drawer-link.is-active{color:var(--txt)}
.drawer-link.is-active::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:4px;height:4px;
  border-radius:50%;
  background:var(--cloud);
}
.drawer-foot{padding:18px 22px 26px;border-top:1px solid var(--line)}

/* ---------- 按钮 ---------- */
.btn-glow{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 26px;
  border-radius:var(--r-btn);
  border:1px solid rgba(47,212,200,.5);
  background:linear-gradient(135deg,#7FEAE0,#2FD4C8);
  color:#04211F;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease);
}
.btn-glow:hover,.btn-glow:focus-visible{
  color:#04211F;
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(47,212,200,.5),0 10px 34px -8px rgba(47,212,200,.55);
}
.btn-glow:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(47,212,200,.5),0 4px 16px -8px rgba(47,212,200,.5)}
.btn-glow:disabled{filter:grayscale(.4);opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  border:1px solid var(--line-2);
  background:rgba(255,255,255,.02);
  color:var(--txt-2);
  font-size:15px;
  font-weight:500;
  transition:border-color var(--ease),color var(--ease),transform var(--ease),background-color var(--ease);
}
.btn-ghost:hover,.btn-ghost:focus-visible{
  color:var(--cloud-soft);
  border-color:var(--cloud-line);
  background:rgba(47,212,200,.06);
  transform:translateY(-2px);
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:10px}

/* ---------- 页头横幅 ---------- */
.page-banner{
  position:relative;
  height:420px;
  overflow:hidden;
}
.page-banner__media{position:absolute;inset:0}
.page-banner__media img{width:100%;height:100%;object-fit:cover;opacity:.66}
.page-banner__veil{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(6,13,21,.94) 0%,rgba(6,13,21,.5) 40%,rgba(6,13,21,.97) 100%),
    radial-gradient(60% 72% at 78% 20%,rgba(239,178,92,.20),transparent 70%);
}
.banner-strip{position:absolute;left:0;right:0;bottom:34px;z-index:2}
.strip-card{
  display:flex;
  flex-wrap:wrap;
  gap:22px 40px;
  padding:20px 24px;
  border-radius:var(--r-panel);
  background-color:rgba(10,20,31,.74);
  background-image:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  backdrop-filter:blur(18px) saturate(140%);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:var(--shadow),var(--inset);
}
.strip-item{min-width:180px;flex:1 1 0}
.strip-item h3{font-size:15px;font-weight:600;color:var(--txt);margin-bottom:6px}
.strip-item p{font-size:14px;line-height:1.8;color:var(--txt-2);margin:0}
.strip-item h3::before{
  content:"";
  display:inline-block;
  width:6px;height:6px;
  margin-right:8px;
  border-radius:2px;
  background:var(--dawn);
  transform:translateY(-2px);
}

/* ---------- 页面主标题区 ---------- */
.page-intro{padding:34px 0 8px}
.eyebrow{
  font-size:13px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--dawn);
  margin:0 0 14px;
}
.page-intro h1{
  font-size:clamp(30px,4.6vw,52px);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
  max-width:800px;
  background:linear-gradient(120deg,#7FEAE0,#2FD4C8);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  -webkit-text-fill-color:transparent;
}
.page-intro h1 .h1-plain{
  display:block;
  font-size:.52em;
  letter-spacing:.02em;
  margin-top:14px;
  color:var(--txt);
  -webkit-text-fill-color:var(--txt);
}
.lede{
  max-width:760px;
  margin:22px 0 0;
  font-size:17px;
  line-height:1.9;
  color:var(--txt-2);
}
.intro-side{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.intro-side .btn-ghost,.intro-side .btn-glow{width:100%;max-width:260px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-2);
  background:rgba(255,255,255,.03);
  font-size:12px;
  font-weight:500;
  letter-spacing:.04em;
  color:var(--txt-2);
}
.tag.is-gold{border-color:var(--gold-line);color:var(--dawn)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-sm{padding:64px 0}
.section-alt{
  background:var(--ink-800);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{font-size:clamp(24px,2.4vw,31px);line-height:1.35}
.section-head p{margin:14px 0 0;font-size:16px;line-height:1.9;color:var(--txt-2)}
.section-head .eyebrow{margin-bottom:12px}

/* ---------- 六类需求卡片 ---------- */
.topic-card{
  height:100%;
  display:flex;
  flex-direction:column;
  padding:28px 24px 24px;
  border-radius:var(--r-card);
  background-image:linear-gradient(160deg,rgba(255,255,255,.045),rgba(255,255,255,.012));
  border:1px solid var(--gold-line);
  box-shadow:var(--shadow),var(--inset);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.topic-card:hover{
  transform:translateY(-4px);
  border-color:var(--cloud-line);
  box-shadow:0 0 0 1px rgba(47,212,200,.22),0 24px 54px -24px rgba(0,0,0,.85),var(--inset);
}
.topic-num{
  font-family:"Inter",system-ui,sans-serif;
  font-size:13px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--dawn);
  transition:color var(--ease);
}
.topic-card:hover .topic-num{color:var(--cloud-soft)}
.topic-card h3{font-size:20px;margin:14px 0 10px}
.topic-card p{font-size:15px;line-height:1.85;color:var(--txt-2);margin:0}
.topic-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:20px}
.topic-tags span{
  font-size:12px;
  letter-spacing:.04em;
  color:var(--txt-3);
  padding:3px 10px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
}

/* ---------- 流程时间线 ---------- */
.flow{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:26px;
  position:relative;
}
.flow::before{
  content:"";
  position:absolute;
  top:25px;left:8px;right:8px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,212,200,.34),rgba(47,212,200,.34),transparent);
}
.flow-item{position:relative;padding-top:58px}
.flow-dot{
  position:absolute;
  top:18px;left:0;
  width:16px;height:16px;
  border-radius:50%;
  border:1px solid var(--cloud-line);
  background:var(--ink-900);
}
.flow-dot::after{
  content:"";
  position:absolute;inset:4px;
  border-radius:50%;
  background:var(--cloud);
  box-shadow:0 0 12px rgba(47,212,200,.6);
}
.flow-item h3{font-size:18px;margin-bottom:10px}
.flow-item h3 em{
  font-style:normal;
  font-family:"Inter",system-ui,sans-serif;
  font-size:13px;
  letter-spacing:.14em;
  color:var(--dawn);
  display:block;
  margin-bottom:8px;
}
.flow-item p{font-size:14.5px;line-height:1.85;color:var(--txt-2);margin:0}

/* ---------- 图文与清单 ---------- */
.media-card{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow),var(--inset);
  background:var(--ink-700);
}
.media-card img{width:100%;aspect-ratio:16/11;object-fit:cover}
.check-list li{
  position:relative;
  padding:14px 0 14px 34px;
  border-bottom:1px solid var(--line);
  font-size:15px;
  line-height:1.85;
  color:var(--txt-2);
}
.check-list li:last-child{border-bottom:0}
.check-list li strong{color:var(--txt);font-weight:600}
.tick{
  position:absolute;
  left:0;top:19px;
  width:18px;height:18px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:6px;
  border:1px solid var(--cloud-line);
  background:rgba(47,212,200,.10);
  color:var(--cloud-soft);
  font-size:11px;
  line-height:1;
}
.note-panel{
  margin-top:26px;
  padding:18px 20px;
  border-radius:var(--r-btn);
  border:1px solid var(--gold-line);
  background:rgba(239,178,92,.06);
  font-size:14px;
  line-height:1.85;
  color:var(--txt-2);
}
.note-panel strong{color:var(--dawn);font-weight:600}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);gap:48px}
.faq-side{position:sticky;top:104px;align-self:start}
.faq-side h2{font-size:26px;line-height:1.4;margin-bottom:14px}
.faq-side p{font-size:15px;line-height:1.85;color:var(--txt-2);margin:0}
.faq-acc{
  --bs-accordion-bg:transparent;
  --bs-accordion-color:var(--txt);
  --bs-accordion-border-width:0;
  --bs-accordion-border-color:transparent;
  --bs-accordion-border-radius:0;
  --bs-accordion-inner-border-radius:0;
  --bs-accordion-btn-color:var(--txt);
  --bs-accordion-btn-bg:transparent;
  --bs-accordion-btn-focus-box-shadow:none;
  --bs-accordion-btn-padding-x:16px;
  --bs-accordion-btn-padding-y:18px;
  --bs-accordion-active-color:var(--txt);
  --bs-accordion-active-bg:transparent;
  --bs-accordion-body-padding-x:16px;
  --bs-accordion-body-padding-y:0;
}
.faq-acc .accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
}
.faq-acc .accordion-button{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  font-size:16.5px;
  font-weight:600;
  line-height:1.6;
  color:var(--txt);
  background:transparent;
  box-shadow:none;
}
.faq-acc .accordion-button::before{
  content:"";
  position:absolute;
  left:0;top:16px;bottom:16px;
  width:3px;
  border-radius:3px;
  background:var(--cloud);
  opacity:0;
  transition:opacity var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::before{opacity:1}
.faq-acc .accordion-button::after{
  content:"+";
  flex:0 0 auto;
  width:auto;height:auto;
  background-image:none;
  font-size:20px;
  font-weight:400;
  line-height:1;
  color:var(--cloud);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:transform var(--ease),color var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(45deg)}
.faq-acc .accordion-button:hover{color:var(--cloud-soft)}
.faq-acc .accordion-body{
  padding:0 16px 22px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--txt-2);
}
.faq-acc .accordion-body p{margin:0}

/* ---------- 提交面板 ---------- */
.apply-panel{
  padding:48px;
  border-radius:var(--r-panel);
  background-color:rgba(10,20,31,.72);
  background-image:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  backdrop-filter:blur(18px) saturate(140%);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:var(--shadow),var(--inset);
}
.apply-panel h2{font-size:clamp(22px,2.2vw,28px);line-height:1.4;margin-bottom:14px}
.apply-panel .lead{font-size:15.5px;line-height:1.9;color:var(--txt-2);margin-bottom:22px}
.apply-points li{
  position:relative;
  padding:10px 0 10px 22px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--txt-2);
}
.apply-points li::before{
  content:"";
  position:absolute;
  left:0;top:19px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--dawn);
}
.apply-form .form-row{margin-bottom:16px}
.apply-form label{
  display:block;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--txt-3);
  margin-bottom:8px;
}
.field{
  width:100%;
  padding:13px 15px;
  font-size:15px;
  color:var(--txt);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line-2);
  border-radius:var(--r-btn);
  transition:border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.field::placeholder{color:var(--txt-3)}
.field:hover{border-color:rgba(255,255,255,.24)}
.field:focus{
  outline:none;
  border-color:var(--cloud);
  background:rgba(47,212,200,.05);
  box-shadow:0 0 0 3px rgba(47,212,200,.16);
}
textarea.field{min-height:112px;resize:vertical;line-height:1.8}
.apply-form .btn-glow{width:100%;margin-top:6px}
.form-note{font-size:13px;line-height:1.8;color:var(--txt-3);margin:14px 0 0}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  background:var(--ink-800);
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
  padding:64px 0 44px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--txt-2);margin:0;max-width:320px}
.footer-col{border-left:1px solid var(--line);padding-left:24px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--txt);margin-bottom:16px;letter-spacing:.04em}
.footer-col a{display:block;font-size:14px;line-height:1.8;color:var(--txt-3);padding:5px 0}
.footer-col a:hover{color:var(--cloud-soft)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--txt-3);
}
.fb-links{display:flex;flex-wrap:wrap;gap:18px}
.fb-links a{color:var(--txt-3);font-size:13px}
.fb-links a:hover{color:var(--cloud-soft)}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .section{padding:80px 0}
  .apply-panel{padding:40px}
}
@media (max-width:991.98px){
  .section{padding:64px 0}
  .section-sm{padding:52px 0}
  .page-banner{height:340px}
  .banner-strip{bottom:24px}
  .strip-card{padding:18px;gap:16px 24px}
  .strip-item{min-width:140px}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .faq-side{position:static}
  .flow{grid-template-columns:repeat(2,1fr);gap:24px 28px}
  .flow::before{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px;padding:52px 0 36px}
  .footer-col{border-left:0;padding-left:0}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767.98px){
  body{font-size:15.5px}
  .container{padding-left:18px;padding-right:18px}
  .section{padding:48px 0}
  .section-sm{padding:44px 0}
  .page-banner{height:300px}
  .page-intro{padding:26px 0 0}
  .lede{font-size:16px}
  .intro-side{margin-top:22px}
  .intro-side .btn-ghost,.intro-side .btn-glow{max-width:none}
  .topic-card{padding:24px 20px 20px}
  .flow{grid-template-columns:1fr;gap:22px}
  .flow-item{padding-top:46px}
  .apply-panel{padding:26px 20px}
  .btn-glow,.btn-ghost{height:46px;width:100%;max-width:none}
  .header-actions .btn-glow{width:auto}
  .site-footer{margin-top:64px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:420px){
  .page-intro h1{font-size:28px}
  .strip-item{min-width:100%}
  .tag{height:26px;padding:0 11px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  html{scroll-behavior:auto}
  .btn-glow:hover,.btn-ghost:hover,.topic-card:hover{transform:none}
}