/* roulang page: index */
:root{
  --bg:#060B14;
  --bg-2:#0B1420;
  --panel:#0E1725;
  --primary:#1FD1E8;
  --primary-deep:#0E93A8;
  --violet:#7C8BFF;
  --amber:#FFB020;
  --warn:#FF6B6B;
  --text:#E8EEF7;
  --text-2:#A6B4C8;
  --text-3:#6E7E96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(31,209,232,.45);
  --glass:rgba(255,255,255,.04);
  --r-sm:10px;
  --r:16px;
  --r-lg:20px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-soft:0 10px 30px rgba(0,0,0,.35);
  --glow:0 0 24px rgba(31,209,232,.35);
  --glow-lg:0 0 40px rgba(31,209,232,.4);
  --sec:112px;
  --ease:180ms cubic-bezier(.4,0,.2,1);
}
*,*::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:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 520px at 18% -8%,rgba(31,209,232,.10),transparent 62%),
    radial-gradient(760px 480px at 88% 6%,rgba(124,139,255,.08),transparent 60%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.035;
  background-image:linear-gradient(rgba(31,209,232,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(31,209,232,.6) 1px,transparent 1px);
  background-size:64px 64px;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
a:hover{color:var(--primary);}
button,input{font:inherit;color:inherit;}
button{border:0;background:none;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 48px;position:relative;z-index:1;}
.section{padding:var(--sec) 0;position:relative;z-index:1;}
.section--tight{padding:72px 0;}
.section--alt{background:linear-gradient(180deg,rgba(11,20,32,.65),rgba(6,11,20,.2));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--primary);font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);display:block;box-shadow:var(--glow);}
.sec-head{max-width:760px;margin-bottom:56px;}
.sec-head h2{font-size:34px;line-height:1.25;margin:14px 0 16px;letter-spacing:.01em;}
.sec-head p{color:var(--text-2);font-size:17px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:"Inter","HarmonyOS Sans",system-ui,sans-serif;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  height:72px;
  transition:background-color .25s ease,border-color .25s ease,backdrop-filter .25s ease,box-shadow .25s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(6,11,20,.78);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 40px rgba(0,0,0,.45);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--primary),var(--primary-deep));
  display:grid;place-items:center;font-weight:800;font-size:15px;color:#04121A;
  box-shadow:var(--glow);letter-spacing:-.02em;
}
.brand__text{font-size:18px;font-weight:700;letter-spacing:.01em;white-space:nowrap;}
.brand__text .c1{color:var(--primary);}
.brand__text .c2{color:var(--text);}
.nav__links{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav__link{
  position:relative;display:inline-block;
  padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);white-space:nowrap;
}
.nav__link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav__link.is-active{color:var(--text);font-weight:600;}
.nav__link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--primary);border-radius:2px;box-shadow:var(--glow);
}
.nav__right{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.icon-btn{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-2);
  background:rgba(255,255,255,.03);
  transition:all var(--ease);
}
.icon-btn:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(31,209,232,.08);}
.icon-btn:active{transform:translateY(1px);}
.nav-toggle{display:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:12px;
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:all var(--ease);white-space:nowrap;
}
.btn--primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#04121A;
  box-shadow:var(--glow);
}
.btn--primary:hover{color:#04121A;filter:brightness(1.08);box-shadow:var(--glow-lg);transform:translateY(-1px);}
.btn--primary:active{transform:translateY(1px);box-shadow:0 0 14px rgba(31,209,232,.3);}
.btn--ghost{
  border:1px solid var(--line);color:var(--text);
  background:rgba(255,255,255,.02);
}
.btn--ghost:hover{border-color:var(--line-strong);background:rgba(31,209,232,.08);color:var(--primary);transform:translateY(-1px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{padding:10px 18px;font-size:14px;}
.btn--block{width:100%;}

/* ---------- Hero ---------- */
.hero{padding:calc(72px + 64px) 0 96px;position:relative;z-index:1;}
.hero__grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;}
.hero__badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(31,209,232,.07);
  font-size:13px;color:var(--primary);font-weight:600;
}
.hero__badge span{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:var(--glow);}
.hero h1{
  font-size:50px;line-height:1.18;margin:22px 0 20px;letter-spacing:.005em;font-weight:800;
}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero__sub{color:var(--text-2);font-size:17.5px;max-width:520px;}
.hero__actions{display:flex;gap:14px;margin:32px 0 36px;flex-wrap:wrap;}
.trust{display:flex;gap:40px;border-top:1px solid var(--line);padding-top:26px;}
.trust__item{min-width:0;}
.trust__num{font-size:26px;font-weight:700;color:var(--text);letter-spacing:-.02em;line-height:1.3;}
.trust__num i{font-style:normal;color:var(--primary);font-size:16px;margin-left:2px;}
.trust__label{font-size:13px;color:var(--text-3);margin-top:2px;}
.hero__visual{position:relative;}
.hero__frame{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
  aspect-ratio:16/11;background:var(--bg-2);
}
.hero__frame img{width:100%;height:100%;object-fit:cover;filter:saturate(1.05) contrast(1.02);}
.hero__frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,.05) 30%,rgba(6,11,20,.72) 100%);
}
.float-card{
  position:absolute;
  background:rgba(14,23,37,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-top-color:rgba(255,255,255,.16);
  border-radius:14px;
  padding:14px 18px;
  box-shadow:var(--shadow-soft);
}
.float-card--a{left:-24px;bottom:64px;}
.float-card--b{right:-18px;top:44px;}
.float-card__label{font-size:12px;color:var(--text-3);letter-spacing:.08em;}
.float-card__value{font-size:20px;font-weight:700;color:var(--primary);letter-spacing:-.01em;}
.float-card__value small{font-size:12px;color:var(--text-2);font-weight:500;margin-left:4px;}
.float-card__bars{display:flex;gap:3px;margin-top:8px;}
.float-card__bars i{display:block;width:6px;height:16px;border-radius:2px;background:rgba(255,255,255,.12);}
.float-card__bars i.on{background:var(--primary);box-shadow:0 0 8px rgba(31,209,232,.5);}
.float-card__bars i.amber{background:var(--amber);box-shadow:0 0 8px rgba(255,176,32,.4);}

/* ---------- 价值主张 ---------- */
.value-grid{display:grid;grid-template-columns:8fr 4fr;grid-template-rows:auto auto;gap:24px;}
.value-main{
  grid-row:span 2;
  background:linear-gradient(160deg,rgba(31,209,232,.08),rgba(14,23,37,.4));
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:38px 40px;position:relative;overflow:hidden;
}
.value-main::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--primary),transparent);
  box-shadow:0 0 18px rgba(31,209,232,.55);
}
.value-main h3{font-size:25px;line-height:1.35;margin-bottom:16px;}
.value-main p{color:var(--text-2);max-width:620px;}
.value-list{margin-top:26px;display:grid;gap:12px;}
.value-list li{display:flex;gap:12px;align-items:flex-start;color:var(--text-2);font-size:15.5px;}
.value-list li b{color:var(--text);font-weight:600;}
.check{
  flex:none;width:20px;height:20px;border-radius:6px;margin-top:5px;
  border:1px solid var(--line-strong);background:rgba(31,209,232,.12);
  display:grid;place-items:center;color:var(--primary);font-size:12px;line-height:1;
}
.value-side{
  border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 28px;
  background:rgba(255,255,255,.02);
}
.value-side h4{font-size:18px;margin-bottom:10px;}
.value-side p{font-size:14.5px;color:var(--text-2);}
.value-side .tagline{margin-top:16px;font-size:13px;color:var(--primary);letter-spacing:.06em;}

/* ---------- 功能分组 ---------- */
.feature-group{
  display:grid;grid-template-columns:4fr 8fr;gap:56px;
  padding:44px 0;border-top:1px solid var(--line);
}
.feature-group:last-child{border-bottom:1px solid var(--line);}
.feature-group__left h3{font-size:24px;margin:14px 0 12px;line-height:1.3;}
.feature-group__left p{color:var(--text-2);font-size:15.5px;}
.feature-index{
  font-family:"Inter",system-ui,sans-serif;font-size:13px;font-weight:700;
  color:var(--primary);letter-spacing:.2em;
}
.feature-items{display:grid;grid-template-columns:1fr 1fr;gap:18px 24px;}
.feature-item{
  border:1px solid var(--line);border-radius:var(--r);
  padding:22px 24px;background:rgba(255,255,255,.02);
  transition:all var(--ease);
}
.feature-item:hover{transform:translateY(-2px);border-color:rgba(31,209,232,.3);background:rgba(31,209,232,.05);}
.feature-item h4{font-size:17px;margin-bottom:8px;}
.feature-item p{font-size:14.5px;color:var(--text-2);}

/* ---------- 使用场景 ---------- */
.scene{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center;margin-bottom:88px;}
.scene:last-child{margin-bottom:0;}
.scene--rev .scene__text{order:2;}
.scene--rev .scene__media{order:1;}
.scene__media{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:4/3;box-shadow:var(--shadow-soft);background:var(--bg-2);
}
.scene__media img{width:100%;height:100%;object-fit:cover;}
.scene__tag{
  display:inline-block;padding:5px 13px;border-radius:999px;
  border:1px solid var(--line);font-size:12.5px;color:var(--text-2);
  letter-spacing:.04em;margin-bottom:16px;
}
.scene__tag b{color:var(--primary);font-weight:600;}
.scene__text h3{font-size:26px;line-height:1.32;margin-bottom:14px;}
.scene__text > p{color:var(--text-2);}
.scene__points{margin-top:22px;display:grid;gap:12px;}
.scene__points li{
  display:flex;gap:12px;font-size:15px;color:var(--text-2);
  padding-left:0;
}
.scene__points li span.dot{
  flex:none;width:5px;height:5px;border-radius:50%;background:var(--primary);
  margin-top:11px;box-shadow:var(--glow);
}
.scene__points li b{color:var(--text);font-weight:600;}

/* ---------- 案例 ---------- */
.case-track{
  display:flex;gap:22px;overflow-x:auto;padding:6px 4px 22px;
  scroll-snap-type:x mandatory;
  scrollbar-color:rgba(31,209,232,.4) rgba(255,255,255,.05);
  scrollbar-width:thin;
}
.case-track::-webkit-scrollbar{height:6px;}
.case-track::-webkit-scrollbar-track{background:rgba(255,255,255,.05);border-radius:99px;}
.case-track::-webkit-scrollbar-thumb{background:rgba(31,209,232,.4);border-radius:99px;}
.case-card{
  flex:0 0 380px;scroll-snap-align:start;
  position:relative;border:1px solid var(--line);border-radius:var(--r-lg);
  background:rgba(255,255,255,.025);padding:28px 28px 26px 32px;
  transition:all var(--ease);
}
.case-card::before{
  content:"";position:absolute;left:0;top:26px;bottom:26px;width:3px;border-radius:0 3px 3px 0;
  background:var(--primary);box-shadow:0 0 16px rgba(31,209,232,.6);
}
.case-card:hover{transform:translateY(-2px);border-color:rgba(31,209,232,.3);}
.case-card__cover{
  border-radius:12px;overflow:hidden;aspect-ratio:16/9;margin-bottom:22px;
  border:1px solid var(--line);
}
.case-card__cover img{width:100%;height:100%;object-fit:cover;}
.case-card h3{font-size:19px;line-height:1.4;margin-bottom:10px;}
.case-card p{font-size:14.5px;color:var(--text-2);}
.case-metrics{display:flex;gap:22px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line);}
.case-metrics div strong{display:block;font-size:20px;color:var(--amber);letter-spacing:-.01em;}
.case-metrics div span{font-size:12.5px;color:var(--text-3);}

/* ---------- 价格 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:center;}
.price-card{
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:rgba(255,255,255,.025);padding:34px 30px;
  transition:all var(--ease);position:relative;
}
.price-card:hover{transform:translateY(-3px);border-color:rgba(31,209,232,.3);}
.price-card h3{font-size:19px;margin-bottom:6px;}
.price-card .desc{font-size:14px;color:var(--text-3);min-height:42px;}
.price-card .amount{font-size:38px;font-weight:800;letter-spacing:-.03em;margin:16px 0 4px;}
.price-card .amount small{font-size:14px;font-weight:500;color:var(--text-3);margin-left:6px;letter-spacing:0;}
.price-card ul{margin:24px 0 28px;display:grid;gap:11px;}
.price-card ul li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);}
.price-card ul li::before{content:"";flex:none;width:6px;height:6px;border-radius:50%;background:var(--text-3);margin-top:11px;}
.price-card--featured{
  transform:scale(1.04);
  border-color:var(--line-strong);
  background:linear-gradient(170deg,rgba(31,209,232,.10),rgba(14,23,37,.6));
  box-shadow:var(--shadow),0 0 40px rgba(31,209,232,.18);
  z-index:2;
}
.price-card--featured:hover{transform:scale(1.04) translateY(-3px);}
.price-card--featured ul li::before{background:var(--primary);box-shadow:0 0 8px rgba(31,209,232,.6);}
.price-badge{
  position:absolute;top:-13px;right:24px;
  background:var(--amber);color:#20130A;
  font-size:12px;font-weight:700;letter-spacing:.06em;
  padding:5px 12px;border-radius:999px;
  box-shadow:0 0 20px rgba(255,176,32,.4);
}
.price-note{margin-top:26px;font-size:13.5px;color:var(--text-3);text-align:center;}

/* ---------- 资讯列表（CMS） ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px;flex-wrap:wrap;}
.news-head .sec-head{margin-bottom:0;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  border:1px solid var(--line);border-radius:var(--r);
  background:rgba(255,255,255,.025);
  padding:24px 26px;display:flex;flex-direction:column;
  transition:all var(--ease);
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(31,209,232,.3);background:rgba(31,209,232,.04);}
.news-card__top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;}
.badge{
  display:inline-block;padding:4px 11px;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--primary);
  font-size:12px;letter-spacing:.04em;white-space:nowrap;
}
.news-card__time{font-size:12.5px;color:var(--text-3);white-space:nowrap;}
.news-card__title{font-size:18px;line-height:1.5;margin-bottom:10px;font-weight:600;}
.news-card__title a:hover{color:var(--primary);}
.news-card__desc{
  font-size:14.5px;color:var(--text-2);flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__foot{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);}
.news-card__link{font-size:14px;color:var(--primary);display:inline-flex;align-items:center;gap:6px;}
.news-card__link:hover{gap:10px;}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-lg);
  padding:56px 24px;text-align:center;background:rgba(255,255,255,.015);
}
.empty-state .ico{
  width:48px;height:48px;margin:0 auto 16px;border-radius:14px;
  border:1px solid var(--line);display:grid;place-items:center;color:var(--text-3);
}
.empty-state p{color:var(--text-2);margin-bottom:16px;}
.empty-state a{color:var(--primary);font-size:14.5px;}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:56px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 2px;text-align:left;font-size:17px;font-weight:600;color:var(--text);
  transition:color var(--ease);
}
.faq-item__q:hover{color:var(--primary);}
.faq-item__q .arrow{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);display:grid;place-items:center;
  color:var(--text-3);font-size:13px;transition:all var(--ease);
}
.faq-item.is-open .faq-item__q{color:var(--primary);}
.faq-item.is-open .faq-item__q .arrow{
  transform:rotate(90deg);border-color:var(--line-strong);color:var(--primary);
  background:rgba(31,209,232,.1);box-shadow:var(--glow);
}
.faq-item__a{
  max-height:0;overflow:hidden;opacity:0;
  transition:max-height 200ms ease,opacity 200ms ease,padding 200ms ease;
}
.faq-item.is-open .faq-item__a{max-height:320px;opacity:1;padding:0 40px 24px 2px;}
.faq-item__a p{color:var(--text-2);font-size:15.5px;}

/* ---------- CTA ---------- */
.cta-band{
  border-radius:24px;padding:56px 56px;
  background:
    radial-gradient(600px 300px at 12% 20%,rgba(31,209,232,.16),transparent 65%),
    linear-gradient(160deg,rgba(14,23,37,.95),rgba(6,11,20,.95));
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  box-shadow:var(--shadow);flex-wrap:wrap;
}
.cta-band h2{font-size:30px;line-height:1.3;margin-bottom:10px;}
.cta-band p{color:var(--text-2);max-width:560px;font-size:16px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);margin-top:var(--sec);
  padding:72px 0 0;position:relative;z-index:1;
  background:linear-gradient(180deg,rgba(11,20,32,.5),rgba(6,11,20,.9));
}
.footer-grid{display:grid;grid-template-columns:2.2fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14.5px;color:var(--text-2);max-width:320px;}
.footer-col h4{font-size:14px;letter-spacing:.1em;color:var(--text-3);margin-bottom:18px;font-weight:600;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{font-size:14.5px;color:var(--text-2);}
.footer-col a:hover{color:var(--primary);}
.footer-contact li{font-size:14.5px;color:var(--text-2);display:flex;gap:10px;}
.footer-contact li span.k{color:var(--text-3);flex:none;width:52px;}
.footer-bar{
  border-top:1px solid var(--line);padding:24px 0;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13.5px;color:var(--text-3);
}
.footer-bar .links{display:flex;gap:18px;flex-wrap:wrap;}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  border:1px solid var(--line);border-radius:999px;padding:8px 16px;
  color:var(--text-2);font-size:13.5px;
}
.to-top:hover{border-color:var(--line-strong);color:var(--primary);background:rgba(31,209,232,.07);}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);z-index:200;
  background:rgba(9,16,26,.96);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .26s cubic-bezier(.4,0,.2,1);
  padding:24px 24px 32px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer__link{
  padding:14px 12px;border-radius:12px;font-size:16px;color:var(--text-2);
  border:1px solid transparent;
}
.drawer__link:hover,.drawer__link.is-active{
  color:var(--primary);background:rgba(31,209,232,.07);border-color:var(--line);
}
.drawer .btn{margin-top:20px;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,7,12,.6);z-index:190;
  opacity:0;visibility:hidden;transition:all .26s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 32px;}
  .hero h1{font-size:44px;}
  .nav__links{gap:2px;}
  .nav__link{padding:10px 10px;font-size:14.5px;}
}
@media (max-width:1023px){
  :root{--sec:84px;}
  .nav__links{display:none;}
  .nav-toggle{display:grid;}
  .hero{padding:calc(72px + 44px) 0 72px;}
  .hero__grid{grid-template-columns:1fr;gap:44px;}
  .hero h1{font-size:38px;}
  .hero__frame{aspect-ratio:16/10;}
  .float-card--a{left:16px;bottom:20px;}
  .float-card--b{right:16px;top:20px;}
  .value-grid{grid-template-columns:1fr;}
  .value-main{grid-row:auto;}
  .feature-group{grid-template-columns:1fr;gap:28px;}
  .scene{grid-template-columns:1fr;gap:32px;margin-bottom:64px;}
  .scene--rev .scene__text,.scene--rev .scene__media{order:initial;}
  .faq-wrap{grid-template-columns:1fr;gap:36px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .price-grid{grid-template-columns:1fr;gap:20px;}
  .price-card--featured{transform:none;order:-1;}
  .price-card--featured:hover{transform:translateY(-3px);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:44px 36px;}
}
@media (max-width:767px){
  :root{--sec:64px;}
  .container{padding:0 20px;}
  .hero h1{font-size:31px;}
  .hero__sub{font-size:16px;}
  .hero__actions{gap:12px;}
  .hero__actions .btn{width:100%;}
  .trust{gap:24px;flex-wrap:wrap;}
  .trust__num{font-size:22px;}
  .sec-head h2{font-size:26px;}
  .feature-items{grid-template-columns:1fr;}
  .scene__text h3{font-size:22px;}
  .case-card{flex:0 0 84%;}
  .news-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band{padding:36px 24px;}
  .cta-band h2{font-size:24px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{width:100%;}
  .footer-bar{flex-direction:column;align-items:flex-start;}
}
@media (max-width:424px){
  .hero h1{font-size:27px;}
  .float-card{padding:11px 14px;}
  .float-card__value{font-size:17px;}
  .news-card__top{flex-wrap:wrap;gap:8px;}
  .case-metrics{gap:16px;}
}

/* roulang page: article */
:root{
  --bg:#060B14;
  --bg-2:#0B1420;
  --panel:#0E1725;
  --primary:#1FD1E8;
  --primary-deep:#0E93A8;
  --secondary:#7C8BFF;
  --amber:#FFB020;
  --danger:#FF6B6B;
  --text:#E8EEF7;
  --text-2:#A6B4C8;
  --text-3:#6E7E96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(31,209,232,.45);
  --glass:rgba(255,255,255,.04);
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:20px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --ease:180ms cubic-bezier(.4,0,.2,1);
  --maxw:1240px;
  --font:"HarmonyOS Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(900px 620px at 10% -6%, rgba(31,209,232,.10), transparent 62%),
    radial-gradient(760px 520px at 94% 2%, rgba(124,139,255,.09), transparent 64%),
    linear-gradient(180deg,#060B14 0%,#08111C 45%,#060B14 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 0%, #000 0%, transparent 78%);
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background var(--ease);}
a:hover{color:var(--primary);}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:.2px;color:var(--text);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(31,209,232,.28);color:#fff;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 48px;position:relative;z-index:1;}
.skip{position:absolute;left:-9999px;top:0;}
.skip:focus{left:16px;top:12px;z-index:200;background:var(--panel);padding:10px 16px;border-radius:10px;border:1px solid var(--line-strong);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:inherit;font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;border-radius:12px;border:1px solid transparent;
  text-decoration:none;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease),filter var(--ease);
}
.btn--primary{
  background:linear-gradient(135deg,#28DDF3 0%,#0E93A8 100%);
  color:#04161C;
  box-shadow:0 0 24px rgba(31,209,232,.35);
}
.btn--primary:hover{filter:brightness(1.08);box-shadow:0 0 40px rgba(31,209,232,.52);transform:translateY(-1px);color:#04161C;}
.btn--primary:active{transform:translateY(1px);box-shadow:0 0 16px rgba(31,209,232,.3);}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text);}
.btn--ghost:hover{border-color:var(--line-strong);background:rgba(31,209,232,.07);color:var(--primary);transform:translateY(-1px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{padding:10px 18px;font-size:14px;border-radius:10px;}
.btn[disabled],.btn:disabled{opacity:.45;box-shadow:none;pointer-events:none;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(6,11,20,.55);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),backdrop-filter var(--ease);
}
.site-header.is-scrolled{
  background:rgba(8,15,25,.78);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:70px;}
.nav > div:first-child{display:flex;align-items:center;min-width:0;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  font-size:15px;font-weight:800;color:#04121A;
  background:linear-gradient(135deg,#1FD1E8,#0E93A8);
  box-shadow:0 0 20px rgba(31,209,232,.45);
}
.brand__text{font-size:17px;font-weight:700;white-space:nowrap;letter-spacing:.2px;}
.brand__text .c1{color:var(--primary);}
.brand__text .c2{color:var(--text);}
.nav__links{display:flex;align-items:center;gap:4px;margin-left:30px;}
.nav__link{
  position:relative;padding:9px 14px;font-size:14.5px;color:var(--text-2);
  border-radius:9px;white-space:nowrap;
}
.nav__link:hover{color:var(--primary);background:rgba(255,255,255,.045);}
.nav__link.is-active{color:var(--text);}
.nav__link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;
  background:var(--primary);border-radius:2px;box-shadow:0 0 10px rgba(31,209,232,.85);
}
.nav__right{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.icon-btn{
  width:36px;height:36px;display:grid;place-items:center;
  background:transparent;border:1px solid var(--line);border-radius:10px;color:var(--text-2);
  transition:color var(--ease),border-color var(--ease),background var(--ease);
}
.icon-btn:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(31,209,232,.08);}
.icon-btn:active{transform:translateY(1px);}
.nav-toggle{display:none;}
.nav-backdrop{
  position:fixed;inset:0;background:rgba(3,7,13,.66);z-index:55;
  opacity:0;visibility:hidden;transition:opacity 220ms ease,visibility 220ms ease;
}
.nav-backdrop.is-open{opacity:1;visibility:visible;}

/* ---------- 文章头部 ---------- */
.article-head{
  padding:150px 0 44px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(760px 420px at 18% 0%, rgba(31,209,232,.11), transparent 68%),
    linear-gradient(180deg, rgba(11,20,32,.72) 0%, rgba(6,11,20,0) 100%);
}
.article-head__inner{max-width:820px;}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13.5px;color:var(--text-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb .sep{color:rgba(255,255,255,.18);}
.breadcrumb .current{color:var(--text-2);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-title{
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.24;
  font-weight:800;
  letter-spacing:.4px;
  margin-bottom:22px;
}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:13.5px;color:var(--text-3);}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;font-size:12.5px;font-weight:600;
  color:var(--primary);background:rgba(31,209,232,.08);
  border:1px solid var(--line-strong);border-radius:999px;
}
.badge--amber{color:var(--amber);background:rgba(255,176,32,.08);border-color:rgba(255,176,32,.4);}
.meta-dot{width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.22);}

/* ---------- 正文 ---------- */
.article-main{padding:56px 0 20px;}
.article-wrap{max-width:800px;margin:0 auto;}
.prose{font-size:17px;line-height:1.9;color:#C2CCD9;}
.prose > * + *{margin-top:22px;}
.prose > p:first-of-type{
  position:relative;
  font-size:19px;line-height:1.85;color:#DCE4EF;
  padding-left:20px;
  border-left:3px solid var(--primary);
  border-radius:0 4px 4px 0;
  margin-bottom:30px;
}
.prose > p:first-of-type::before{
  content:"";position:absolute;left:-3px;top:0;bottom:0;width:3px;
  box-shadow:0 0 18px 3px rgba(31,209,232,.6);
}
.prose h2{
  position:relative;
  margin-top:48px;margin-bottom:6px;
  padding-left:20px;
  font-size:26px;font-weight:700;line-height:1.4;color:var(--text);
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.5em;
  width:8px;height:8px;border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 14px rgba(31,209,232,.85);
}
.prose h3{
  margin-top:34px;margin-bottom:4px;
  font-size:20px;font-weight:700;color:var(--secondary);
}
.prose h4{margin-top:26px;font-size:17px;font-weight:700;color:var(--text);}
.prose a{color:var(--primary);border-bottom:1px solid rgba(31,209,232,.4);}
.prose a:hover{border-bottom-color:var(--primary);}
.prose strong{color:var(--text);font-weight:700;}
.prose em{color:var(--text-2);font-style:normal;border-bottom:1px dashed rgba(255,255,255,.22);}
.prose img{width:100%;height:auto;border-radius:12px;margin:28px 0 10px;}
.prose figure{margin:28px 0;}
.prose figcaption{font-size:13.5px;color:var(--text-3);text-align:center;margin-top:10px;}
.prose blockquote{
  margin:32px 0;padding:20px 24px;
  border-left:3px solid var(--primary);
  background:rgba(255,255,255,.045);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-radius:0 var(--radius) var(--radius) 0;
  color:var(--text-2);font-size:16px;line-height:1.85;
}
.prose ul li{position:relative;padding-left:26px;margin-top:10px;}
.prose ul li::before{
  content:"";position:absolute;left:6px;top:.78em;
  width:6px;height:6px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 10px rgba(31,209,232,.6);
}
.prose ol{counter-reset:olc;}
.prose ol li{position:relative;counter-increment:olc;padding-left:40px;margin-top:12px;}
.prose ol li::before{
  content:counter(olc);
  position:absolute;left:0;top:.28em;
  width:26px;height:26px;display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;color:var(--primary);
  border:1px solid var(--line-strong);border-radius:8px;
  background:rgba(31,209,232,.07);
}
.prose hr{border:0;border-top:1px solid var(--line);margin:38px 0;}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14.5px;color:var(--primary);
  background:rgba(31,209,232,.08);padding:2px 7px;border-radius:6px;
}
.prose pre{
  background:rgba(255,255,255,.035);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px 22px;overflow-x:auto;
  font-size:14.5px;line-height:1.75;
}
.prose pre code{background:none;padding:0;color:var(--text-2);}
.prose table{width:100%;border-collapse:collapse;font-size:15px;}
.prose th,.prose td{border:1px solid var(--line);padding:12px 14px;text-align:left;}
.prose th{background:rgba(255,255,255,.035);color:var(--text);font-weight:600;}

/* 空态 */
.empty-state{
  padding:64px 32px;text-align:center;
  background:var(--glass);
  border:1px dashed var(--line);
  border-radius:var(--radius-lg);
  color:var(--text-2);
}
.empty-state .ico{
  width:54px;height:54px;margin:0 auto 18px;border-radius:14px;
  display:grid;place-items:center;color:var(--primary);
  border:1px solid var(--line-strong);background:rgba(31,209,232,.07);
}
.empty-state h2{font-size:21px;margin-bottom:10px;}
.empty-state p{font-size:15px;color:var(--text-3);margin-bottom:22px;}

/* 文末提示条 */
.article-foot-note{
  max-width:800px;margin:48px auto 0;
  padding:18px 22px;display:flex;align-items:flex-start;gap:12px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  font-size:14px;color:var(--text-3);line-height:1.8;
}
.article-foot-note .dot{
  flex:0 0 auto;margin-top:8px;width:8px;height:8px;border-radius:50%;
  background:var(--amber);box-shadow:0 0 12px rgba(255,176,32,.7);
}

/* ---------- 相关推荐 ---------- */
.related{padding:84px 0 20px;}
.section-head{max-width:720px;margin-bottom:38px;}
.section-head .eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:2px;
  color:var(--primary);text-transform:uppercase;margin-bottom:12px;
}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:12px;}
.section-head p{color:var(--text-3);font-size:15.5px;}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:flex;flex-direction:column;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(31,209,232,.32);box-shadow:var(--shadow);}
.card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0A121D;}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms ease;}
.card:hover .card__media img{transform:scale(1.04);}
.card__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,0) 40%,rgba(6,11,20,.72) 100%);
}
.card__body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;gap:12px;}
.card__title{font-size:18px;font-weight:700;line-height:1.45;color:var(--text);}
.card:hover .card__title{color:var(--primary);}
.card__excerpt{
  font-size:14.5px;color:var(--text-3);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card__foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.card__arrow{color:var(--primary);font-weight:700;}

/* ---------- 返回入口 CTA ---------- */
.return-band{padding:72px 0 96px;}
.return-box{
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  padding:36px 40px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:
    radial-gradient(600px 260px at 8% 0%, rgba(31,209,232,.13), transparent 66%),
    linear-gradient(140deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.return-box h2{font-size:clamp(20px,2.4vw,26px);margin-bottom:8px;}
.return-box p{color:var(--text-3);font-size:15px;}
.return-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,20,32,.6) 0%,rgba(6,11,20,.95) 100%);
  padding:72px 0 0;
  margin-top:20px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:52px;border-bottom:1px solid var(--line);
}
.footer-brand p{margin-top:18px;font-size:14.5px;color:var(--text-3);line-height:1.85;max-width:320px;}
.footer-col h4{font-size:15px;font-weight:700;color:var(--text);margin-bottom:18px;letter-spacing:.4px;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{font-size:14.5px;color:var(--text-3);}
.footer-col ul li a:hover{color:var(--primary);}
.footer-contact li{display:flex;gap:10px;font-size:14.5px;color:var(--text-3);margin-bottom:12px;}
.footer-contact .k{color:var(--text-2);flex:0 0 auto;}
.footer-bar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:24px 0 28px;font-size:13.5px;color:var(--text-3);
}
.footer-bar .links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.to-top{color:var(--text-2);}
.to-top:hover{color:var(--primary);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 32px;}
  .nav__link{padding:9px 11px;font-size:14px;}
  .nav__links{margin-left:16px;}
}
@media (max-width:1023px){
  .container{padding:0 32px;}
  .nav-toggle{display:grid;}
  .nav__links{
    position:fixed;top:0;right:0;z-index:60;
    width:min(320px,86vw);height:100vh;
    flex-direction:column;align-items:stretch;gap:6px;
    margin-left:0;padding:92px 22px 32px;
    background:rgba(9,16,27,.97);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    border-left:1px solid var(--line);
    transform:translateX(105%);
    transition:transform 240ms cubic-bezier(.4,0,.2,1);
    overflow-y:auto;
  }
  .nav__links.is-open{transform:translateX(0);}
  .nav__link{padding:13px 14px;font-size:15.5px;border-radius:10px;}
  .nav__link.is-active{background:rgba(31,209,232,.09);}
  .nav__link.is-active::after{left:14px;right:auto;width:3px;height:18px;bottom:auto;top:50%;transform:translateY(-50%);}
  .article-head{padding:130px 0 38px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .brand__text{font-size:15px;}
  .article-head{padding:118px 0 32px;}
  .article-title{font-size:30px;letter-spacing:.2px;}
  .article-main{padding:40px 0 10px;}
  .prose{font-size:16px;line-height:1.85;}
  .prose > p:first-of-type{font-size:17px;padding-left:16px;}
  .prose h2{font-size:22px;margin-top:38px;}
  .prose h3{font-size:18px;}
  .card-grid{grid-template-columns:1fr;}
  .related{padding:64px 0 12px;}
  .return-band{padding:56px 0 72px;}
  .return-box{padding:28px 22px;}
  .return-actions{width:100%;}
  .return-actions .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:40px;}
  .footer-bar{flex-direction:column;align-items:flex-start;gap:12px;}
  .empty-state{padding:48px 22px;}
}
@media (max-width:424px){
  .article-meta{gap:8px;font-size:13px;}
  .breadcrumb .current{max-width:200px;}
  .badge{padding:4px 10px;font-size:12px;}
  .article-foot-note{font-size:13.5px;}
}

/* roulang page: category1 */
:root{
  --bg:#060B14;
  --bg-2:#0B1420;
  --panel:#0E1725;
  --cyan:#1FD1E8;
  --cyan-d:#0E93A8;
  --violet:#7C8BFF;
  --amber:#FFB020;
  --danger:#FF6B6B;
  --text:#E8EEF7;
  --text-2:#A6B4C8;
  --text-3:#6E7E96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(31,209,232,.45);
  --glass:rgba(255,255,255,.04);
  --radius:18px;
  --radius-sm:12px;
  --radius-lg:22px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-sm:0 10px 30px rgba(0,0,0,.35);
  --gap:24px;
  --ease:180ms cubic-bezier(.2,.7,.3,1);
}
*,*::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:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  background-image:
    radial-gradient(1100px 620px at 12% -8%, rgba(31,209,232,.10), transparent 60%),
    radial-gradient(900px 520px at 92% 0%, rgba(124,139,255,.10), transparent 62%),
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  background-attachment:fixed;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
a:hover{color:var(--cyan);}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:.01em;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(31,209,232,.28);color:#fff;}

.container{max-width:1240px;margin:0 auto;padding:0 48px;}
.section{padding:104px 0;position:relative;}
.section--tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);
  border:1px solid var(--line-strong);border-radius:999px;padding:5px 14px;margin-bottom:16px;
  background:rgba(31,209,232,.06);
}
.section-head h2{font-size:34px;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16px;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,11,20,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{background:rgba(6,11,20,.94);box-shadow:0 12px 40px rgba(0,0,0,.5);}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--cyan),var(--cyan-d));
  color:#04121a;font-weight:800;font-size:16px;box-shadow:0 0 20px rgba(31,209,232,.35);
}
.brand__text{font-size:16px;font-weight:700;white-space:nowrap;}
.brand__text .c1{color:var(--cyan);}
.brand__text .c2{color:var(--text);}
.nav__links{display:flex;align-items:center;gap:4px;margin-left:26px;}
.nav__link{
  position:relative;padding:8px 12px;font-size:14.5px;color:var(--text-2);border-radius:8px;
  white-space:nowrap;
}
.nav__link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav__link.is-active{color:var(--text);}
.nav__link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-15px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 12px rgba(31,209,232,.8);
}
.nav__right{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.icon-btn{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-2);background:rgba(255,255,255,.03);
  transition:all var(--ease);
}
.icon-btn:hover{color:var(--cyan);border-color:var(--line-strong);background:rgba(31,209,232,.08);}
.icon-btn:active{transform:translateY(1px);}
.nav-toggle{display:none;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;transition:all var(--ease);white-space:nowrap;
}
.btn--primary{
  background:linear-gradient(140deg,var(--cyan),var(--cyan-d));
  color:#04121A;box-shadow:0 0 24px rgba(31,209,232,.35);
}
.btn--primary:hover{filter:brightness(1.08);box-shadow:0 0 40px rgba(31,209,232,.5);transform:translateY(-1px);color:#04121A;}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{border-color:var(--line);color:var(--text);background:rgba(255,255,255,.02);}
.btn--ghost:hover{border-color:var(--line-strong);background:rgba(31,209,232,.08);color:var(--cyan);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{padding:9px 16px;font-size:14px;border-radius:10px;}
.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed;}

/* ---------- 面包屑 & 分类 Hero ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3);padding-top:28px;}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--cyan);}
.crumb .sep{opacity:.5;}
.crumb .cur{color:var(--text-2);}

.cat-hero{padding:34px 0 12px;}
.cat-hero__grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
}
.cat-hero h1{font-size:46px;line-height:1.18;margin-bottom:18px;}
.cat-hero h1 .hl{
  background:linear-gradient(120deg,var(--cyan),var(--violet));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.cat-hero__lead{font-size:17px;color:var(--text-2);max-width:560px;margin-bottom:26px;}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.metrics{display:flex;flex-wrap:wrap;gap:28px;padding-top:22px;border-top:1px solid var(--line);}
.metrics .m{min-width:120px;}
.metrics .num{
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:28px;font-weight:700;color:var(--cyan);letter-spacing:-.01em;
}
.metrics .num .unit{font-size:14px;color:var(--text-3);margin-left:3px;font-weight:600;}
.metrics .lbl{font-size:13.5px;color:var(--text-3);}

.cat-hero__visual{position:relative;}
.visual-frame{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);aspect-ratio:16/11;
}
.visual-frame img{width:100%;height:100%;object-fit:cover;}
.visual-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,.05) 0%,rgba(6,11,20,.72) 100%);
}
.float-card{
  position:absolute;left:-18px;bottom:34px;z-index:2;
  background:rgba(11,20,32,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;
  box-shadow:var(--shadow);min-width:196px;
}
.float-card .tag{font-size:12.5px;color:var(--text-3);letter-spacing:.08em;text-transform:uppercase;}
.float-card .val{
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:24px;font-weight:700;color:var(--amber);margin-top:4px;
}
.float-card .sub{font-size:13px;color:var(--text-2);margin-top:2px;}
.float-card--top{left:auto;right:-14px;top:28px;bottom:auto;}

/* ---------- 主体：锚点索引 + 卡片流 ---------- */
.index-layout{
  display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;align-items:start;
}
.index-aside{position:sticky;top:104px;}
.index-aside h2{font-size:14px;letter-spacing:.12em;color:var(--text-3);text-transform:uppercase;margin-bottom:16px;}
.index-list{border-left:1px solid var(--line);}
.index-list li a{
  display:block;padding:9px 0 9px 16px;font-size:14.5px;color:var(--text-2);
  border-left:2px solid transparent;margin-left:-1px;
}
.index-list li a:hover{color:var(--cyan);border-left-color:var(--line-strong);padding-left:18px;}
.index-aside .note{
  margin-top:22px;padding:16px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(255,255,255,.03);font-size:13.5px;color:var(--text-3);line-height:1.7;
}

.group{margin-bottom:64px;scroll-margin-top:104px;}
.group:last-child{margin-bottom:0;}
.group__head{
  display:flex;align-items:baseline;gap:14px;padding-bottom:18px;margin-bottom:26px;
  border-bottom:1px solid var(--line);
}
.group__no{
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:15px;font-weight:700;color:var(--cyan);letter-spacing:.06em;
}
.group__head h2{font-size:24px;}
.group__head .desc{font-size:14px;color:var(--text-3);margin-left:auto;}

.card-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:var(--gap);}
.card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;transition:all var(--ease);position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
}
.card:hover{transform:translateY(-2px);border-color:rgba(31,209,232,.32);box-shadow:var(--shadow-sm);}
.card--wide{grid-column:span 1;}
.card__icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(31,209,232,.10);border:1px solid var(--line-strong);color:var(--cyan);
}
.card__icon svg{width:20px;height:20px;}
.card h3{font-size:19px;margin-bottom:10px;}
.card p{font-size:14.8px;color:var(--text-2);margin-bottom:16px;}
.points li{
  position:relative;padding-left:18px;font-size:14px;color:var(--text-2);margin-bottom:7px;line-height:1.7;
}
.points li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 8px rgba(31,209,232,.7);
}
.card__meta{
  display:flex;align-items:center;gap:10px;margin-top:18px;padding-top:16px;
  border-top:1px dashed var(--line);font-size:13px;color:var(--text-3);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  border:1px solid var(--line);border-radius:999px;padding:3px 11px;
  font-size:12.5px;color:var(--text-2);background:rgba(255,255,255,.03);
}
.badge--cyan{border-color:var(--line-strong);color:var(--cyan);}
.badge--amber{border-color:rgba(255,176,32,.4);color:var(--amber);}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);position:relative;}
.flow::before{
  content:"";position:absolute;top:26px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,209,232,.4),transparent);
}
.flow__item{position:relative;padding-top:66px;}
.flow__dot{
  position:absolute;top:8px;left:0;width:38px;height:38px;border-radius:50%;
  display:grid;place-items:center;font-family:Inter,system-ui,sans-serif;font-size:14px;font-weight:700;
  background:var(--bg-2);border:1px solid var(--line-strong);color:var(--cyan);
  box-shadow:0 0 20px rgba(31,209,232,.25);
}
.flow__item h3{font-size:17.5px;margin-bottom:8px;}
.flow__item p{font-size:14.3px;color:var(--text-2);}
.flow__item .time{
  display:inline-block;margin-top:12px;font-size:12.5px;color:var(--amber);
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
}

/* ---------- 保障带 ---------- */
.assure{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:center;
  border:1px solid var(--line);border-radius:var(--radius-lg);padding:40px;
  background:linear-gradient(140deg,rgba(31,209,232,.06),rgba(124,139,255,.05));
}
.assure h2{font-size:28px;margin-bottom:14px;}
.assure p{color:var(--text-2);font-size:15.5px;}
.assure__list{display:grid;grid-template-columns:1fr 1fr;gap:18px 26px;}
.assure__list li{display:flex;gap:12px;font-size:14.5px;color:var(--text-2);}
.assure__list .dot{
  flex:0 0 auto;width:8px;height:8px;border-radius:50%;margin-top:9px;background:var(--amber);
  box-shadow:0 0 10px rgba(255,176,32,.6);
}
.assure__list strong{color:var(--text);display:block;font-size:15px;margin-bottom:2px;}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto;}
.faq details{
  border-bottom:1px solid var(--line);
}
.faq details:first-of-type{border-top:1px solid var(--line);}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--text);transition:color var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--cyan);}
.faq summary::after{
  content:"";flex:0 0 auto;width:9px;height:9px;margin-right:6px;
  border-right:2px solid var(--cyan);border-bottom:2px solid var(--cyan);
  transform:rotate(45deg);transition:transform var(--ease);opacity:.85;
}
.faq details[open] summary::after{transform:rotate(-135deg);}
.faq .answer{padding:0 4px 24px;font-size:15px;color:var(--text-2);line-height:1.9;max-width:760px;}

/* ---------- CTA ---------- */
.cta-band{
  border:1px solid var(--line-strong);border-radius:var(--radius-lg);
  padding:52px 48px;text-align:center;position:relative;overflow:hidden;
  background:
    radial-gradient(600px 260px at 50% 0%, rgba(31,209,232,.14), transparent 70%),
    linear-gradient(180deg,rgba(11,20,32,.9),rgba(6,11,20,.9));
}
.cta-band h2{font-size:32px;margin-bottom:14px;}
.cta-band p{color:var(--text-2);max-width:620px;margin:0 auto 28px;font-size:15.5px;}
.cta-band .actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;}
.cta-band .fine{margin-top:20px;font-size:13px;color:var(--text-3);}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:rgba(6,11,20,.85);padding:64px 0 0;margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-3);max-width:320px;line-height:1.8;}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--text);margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{font-size:14px;color:var(--text-3);}
.footer-col ul li a:hover{color:var(--cyan);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-3);}
.footer-contact .k{color:var(--text-2);flex:0 0 46px;}
.footer-bar{
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);padding:22px 0 28px;font-size:13px;color:var(--text-3);
}
.footer-bar .links{display:flex;gap:18px;align-items:center;}
.footer-bar a:hover{color:var(--cyan);}
.to-top:hover{text-decoration:underline;text-underline-offset:4px;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 32px;}
  .cat-hero h1{font-size:40px;}
  .index-layout{grid-template-columns:200px minmax(0,1fr);gap:36px;}
}
@media (max-width:1023px){
  .container{padding:0 28px;}
  .section{padding:76px 0;}
  .nav__links{
    position:fixed;top:68px;right:0;width:min(320px,86vw);height:calc(100vh - 68px);
    flex-direction:column;align-items:stretch;gap:6px;margin:0;padding:20px;
    background:rgba(8,14,24,.97);backdrop-filter:blur(16px);border-left:1px solid var(--line);
    transform:translateX(110%);transition:transform 240ms cubic-bezier(.2,.7,.3,1);overflow-y:auto;
  }
  .nav__links.is-open{transform:none;}
  .nav__link{padding:13px 12px;font-size:15.5px;border-radius:10px;}
  .nav__link.is-active::after{display:none;}
  .nav__link.is-active{background:rgba(31,209,232,.1);color:var(--cyan);}
  .nav-toggle{display:grid;}
  .cat-hero__grid{grid-template-columns:1fr;gap:34px;}
  .cat-hero__visual{order:-1;}
  .float-card{left:12px;bottom:16px;}
  .float-card--top{right:12px;top:16px;}
  .index-layout{grid-template-columns:1fr;gap:30px;}
  .index-aside{position:static;}
  .index-list{display:flex;flex-wrap:wrap;gap:8px;border-left:0;}
  .index-list li a{border:1px solid var(--line);border-radius:999px;padding:7px 14px;margin:0;}
  .index-list li a:hover{padding-left:14px;border-color:var(--line-strong);}
  .card-grid{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr 1fr;gap:30px;}
  .flow::before{display:none;}
  .assure{grid-template-columns:1fr;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:58px 0;}
  .section-head h2{font-size:26px;}
  .cat-hero{padding-top:18px;}
  .cat-hero h1{font-size:31px;}
  .cat-hero__lead{font-size:15.5px;}
  .cat-hero__actions .btn{flex:1 1 100%;}
  .metrics{gap:20px;}
  .metrics .num{font-size:23px;}
  .group__head{flex-wrap:wrap;}
  .group__head .desc{margin-left:0;width:100%;}
  .card{padding:22px;}
  .flow{grid-template-columns:1fr;}
  .assure__list{grid-template-columns:1fr;}
  .cta-band{padding:36px 22px;}
  .cta-band h2{font-size:25px;}
  .cta-band .actions .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bar{flex-direction:column;align-items:flex-start;}
}
@media (max-width:424px){
  .brand__text{font-size:14.5px;}
  .cat-hero h1{font-size:27px;}
  .float-card{padding:12px 14px;min-width:160px;}
  .float-card .val{font-size:20px;}
  .badge{font-size:12px;}
  .card__meta{flex-wrap:wrap;}
}

/* roulang page: category2 */
:root{
  --bg:#060B14;
  --bg-2:#0B1420;
  --panel:#0E1725;
  --brand:#1FD1E8;
  --brand-deep:#0E93A8;
  --accent-2:#7C8BFF;
  --amber:#FFB020;
  --warn:#FF6B6B;
  --text:#E8EEF7;
  --text-2:#A6B4C8;
  --text-3:#6E7E96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(31,209,232,.45);
  --glass:rgba(255,255,255,.04);
  --radius-s:10px;
  --radius:16px;
  --radius-l:20px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-sm:0 10px 30px rgba(0,0,0,.32);
  --glow:0 0 24px rgba(31,209,232,.35);
  --glow-lg:0 0 40px rgba(31,209,232,.42);
  --container:1240px;
  --t:180ms cubic-bezier(.4,0,.2,1);
}

*,*::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:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(1000px 620px at 78% -8%, rgba(31,209,232,.10), transparent 62%),
    radial-gradient(760px 520px at 6% 12%, rgba(124,139,255,.08), transparent 60%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.035;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(255,255,255,.6) 1px, transparent 1px);
  background-size:64px 64px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--t);}
a:hover{color:var(--brand);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:.2px;}
p{margin:0;}
input{font:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 48px;
  position:relative;
  z-index:1;
}

/* ============ HEADER ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  height:68px;
  display:flex;
  align-items:center;
  background:rgba(6,11,20,.62);
  border-bottom:1px solid transparent;
  transition:background var(--t),border-color var(--t),backdrop-filter var(--t);
}
.site-header.is-stuck{
  background:rgba(8,14,24,.86);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 40px rgba(0,0,0,.4);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand__mark{
  width:32px;height:32px;
  border-radius:10px;
  display:grid;place-items:center;
  font-family:Inter,system-ui,sans-serif;
  font-weight:800;
  font-size:15px;
  color:#04121A;
  background:linear-gradient(140deg,#1FD1E8,#0E93A8);
  box-shadow:0 0 20px rgba(31,209,232,.4);
}
.brand__text{
  font-size:16.5px;
  font-weight:700;
  letter-spacing:.4px;
  white-space:nowrap;
}
.brand__text .c1{color:var(--brand);}
.brand__text .c2{color:var(--text);}
.brand:hover .brand__text .c2{color:var(--brand);}
.nav__links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:26px;
}
.nav__link{
  position:relative;
  padding:10px 14px;
  font-size:14.5px;
  color:var(--text-2);
  border-radius:8px;
  white-space:nowrap;
  transition:color var(--t),background var(--t);
}
.nav__link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--t);
  box-shadow:0 0 10px rgba(31,209,232,.8);
}
.nav__link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav__link:hover::after{transform:scaleX(1);}
.nav__link.is-active{color:var(--text);}
.nav__link.is-active::after{transform:scaleX(1);}
.nav__right{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:38px;height:38px;
  border-radius:10px;
  display:grid;place-items:center;
  color:var(--text-2);
  border:1px solid var(--line);
  background:rgba(255,255,255,.02);
  transition:color var(--t),border-color var(--t),background var(--t),transform var(--t);
}
.icon-btn:hover{color:var(--brand);border-color:var(--line-strong);background:rgba(31,209,232,.08);}
.icon-btn:active{transform:translateY(1px);}
.nav-toggle{display:none;}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:12px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  transition:background var(--t),box-shadow var(--t),color var(--t),border-color var(--t),transform var(--t);
  cursor:pointer;
  white-space:nowrap;
}
.btn--sm{padding:10px 18px;font-size:14px;border-radius:10px;}
.btn--primary{
  color:#04121A;
  background:linear-gradient(135deg,#2BE0F5,#0E93A8);
  box-shadow:var(--glow);
}
.btn--primary:hover{
  filter:brightness(1.08);
  box-shadow:var(--glow-lg);
  transform:translateY(-1px);
  color:#04121A;
}
.btn--primary:active{transform:translateY(1px);box-shadow:0 0 14px rgba(31,209,232,.3);}
.btn--ghost{
  color:var(--text);
  border-color:rgba(255,255,255,.16);
  background:rgba(255,255,255,.02);
}
.btn--ghost:hover{
  color:var(--brand);
  border-color:var(--line-strong);
  background:rgba(31,209,232,.07);
  transform:translateY(-1px);
}
.btn--ghost:active{transform:translateY(1px);}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none;}

/* ============ BANNER ============ */
.page-banner{
  position:relative;
  margin-top:68px;
  padding:96px 0 64px;
  overflow:hidden;
  background-image:
    linear-gradient(120deg, rgba(6,11,20,.96) 0%, rgba(6,11,20,.82) 44%, rgba(6,11,20,.62) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-banner::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(31,209,232,.5),transparent);
}
.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--text-3);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:var(--text-3);opacity:.6;}
.page-banner h1{
  font-size:clamp(30px,4vw,50px);
  max-width:900px;
  letter-spacing:.4px;
}
.page-banner h1 .hl{
  color:var(--brand);
  text-shadow:0 0 28px rgba(31,209,232,.35);
}
.lead{
  margin-top:20px;
  max-width:760px;
  color:var(--text-2);
  font-size:17px;
  line-height:1.85;
}
.glass-bar{
  margin-top:36px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  background:rgba(255,255,255,.04);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.glass-bar__item{
  padding:20px 22px;
  background:rgba(255,255,255,.02);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.glass-bar__item .k{
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.4px;
}
.glass-bar__item .v{
  margin-top:6px;
  font-family:Inter,system-ui,sans-serif;
  font-size:20px;
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
}

/* ============ SECTION ============ */
.section{padding:104px 0;position:relative;}
.section--tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:1.6px;
  color:var(--brand);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  border-radius:2px;
  background:var(--brand);
  box-shadow:0 0 10px rgba(31,209,232,.9);
}
.section-head h2{font-size:clamp(24px,2.7vw,34px);}
.section-head p{margin-top:16px;color:var(--text-2);font-size:16px;}

/* ============ TABS ============ */
.tabs{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding:6px 0 14px;
  scroll-snap-type:x proximity;
  scrollbar-width:thin;
  scrollbar-color:rgba(31,209,232,.5) transparent;
  border-bottom:1px solid var(--line);
  margin-bottom:44px;
}
.tabs::-webkit-scrollbar{height:4px;}
.tabs::-webkit-scrollbar-track{background:rgba(255,255,255,.05);border-radius:4px;}
.tabs::-webkit-scrollbar-thumb{background:rgba(31,209,232,.5);border-radius:4px;}
.tab-btn{
  flex:0 0 auto;
  scroll-snap-align:start;
  padding:11px 20px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.02);
  color:var(--text-2);
  font-size:14.5px;
  font-weight:600;
  transition:color var(--t),border-color var(--t),background var(--t),box-shadow var(--t),transform var(--t);
}
.tab-btn:hover{color:var(--text);border-color:rgba(31,209,232,.32);background:rgba(31,209,232,.06);}
.tab-btn:active{transform:translateY(1px);}
.tab-btn.is-active{
  color:#04121A;
  background:linear-gradient(135deg,#2BE0F5,#0E93A8);
  border-color:transparent;
  box-shadow:var(--glow);
}
.tab-panel[hidden]{display:none;}

/* ============ SCENE ============ */
.scene{
  display:grid;
  grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);
  gap:56px;
  align-items:center;
}
.scene--flip .scene__media{order:2;}
.scene--flip .scene__body{order:1;}
.scene__media{
  position:relative;
  border-radius:var(--radius-l);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  aspect-ratio:16/10;
  background:var(--panel);
}
.scene__media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform 600ms cubic-bezier(.4,0,.2,1);
}
.scene__media:hover img{transform:scale(1.035);}
.scene__media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,.05),rgba(6,11,20,.62));
  pointer-events:none;
}
.scene__tagline{
  position:absolute;
  left:18px;bottom:18px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  font-size:13px;
  color:var(--text);
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(8,16,26,.6);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.scene__tagline i{
  width:6px;height:6px;border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 10px rgba(31,209,232,.9);
  font-style:normal;
}
.scene__body h3{font-size:clamp(21px,2.1vw,26px);margin-bottom:14px;}
.scene__body > p{color:var(--text-2);font-size:16px;line-height:1.85;}
.cap-list{margin-top:24px;display:grid;gap:12px;}
.cap-list li{
  position:relative;
  padding-left:26px;
  color:var(--text-2);
  font-size:15.5px;
}
.cap-list li::before{
  content:"";
  position:absolute;
  left:2px;top:10px;
  width:8px;height:8px;
  border-radius:2px;
  background:linear-gradient(135deg,#2BE0F5,#0E93A8);
  box-shadow:0 0 10px rgba(31,209,232,.65);
}
.cap-list li strong{color:var(--text);font-weight:600;}
.badges{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  font-size:13.5px;
  color:var(--text-2);
}
.badge b{
  font-family:Inter,system-ui,sans-serif;
  color:var(--amber);
  font-variant-numeric:tabular-nums;
  font-size:14.5px;
}
.badge--brand{border-color:rgba(31,209,232,.32);color:var(--text);}

/* ============ STEPS ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.step{
  position:relative;
  padding:28px 24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--panel);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.step:hover{
  transform:translateY(-2px);
  border-color:rgba(31,209,232,.3);
  box-shadow:var(--shadow-sm);
}
.step__num{
  font-family:Inter,system-ui,sans-serif;
  font-size:13px;
  letter-spacing:2px;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.step h4{margin-top:14px;font-size:18px;}
.step p{margin-top:10px;color:var(--text-2);font-size:14.5px;line-height:1.8;}

/* ============ METRICS ============ */
.metrics{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.metric{
  padding:30px 28px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform var(--t),border-color var(--t);
}
.metric:hover{transform:translateY(-2px);border-color:rgba(31,209,232,.3);}
.metric .num{
  font-family:Inter,system-ui,sans-serif;
  font-size:38px;
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  line-height:1.1;
}
.metric .num span{font-size:20px;margin-left:2px;}
.metric .lbl{margin-top:10px;color:var(--text-2);font-size:14.5px;}

/* ============ FAQ ============ */
.faq{
  border-top:1px solid var(--line);
}
.faq__item{border-bottom:1px solid var(--line);}
.faq__q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 4px;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  transition:color var(--t);
}
.faq__q:hover{color:var(--brand);}
.faq__q .arrow{
  flex:0 0 auto;
  width:26px;height:26px;
  border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line);
  color:var(--text-2);
  transition:transform var(--t),color var(--t),border-color var(--t),background var(--t);
}
.faq__item.is-open .faq__q .arrow{
  transform:rotate(180deg);
  color:var(--brand);
  border-color:var(--line-strong);
  background:rgba(31,209,232,.08);
}
.faq__a{
  max-height:0;
  overflow:hidden;
  transition:max-height 220ms ease;
}
.faq__a p{
  padding:0 4px 24px;
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.9;
  max-width:860px;
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(115deg, rgba(6,11,20,.95), rgba(9,20,32,.8)),
    url("/assets/images/backpic/back-3.webp");
  background-size:cover;
  background-position:center;
}
.cta-band__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  padding:72px 0;
}
.cta-band h2{font-size:clamp(23px,2.5vw,32px);max-width:620px;}
.cta-band p{margin-top:14px;color:var(--text-2);max-width:560px;font-size:15.5px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ============ FOOTER ============ */
.site-footer{
  position:relative;
  padding:72px 0 0;
  background:var(--bg-2);
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand p{
  margin-top:18px;
  color:var(--text-2);
  font-size:14.5px;
  max-width:340px;
  line-height:1.85;
}
.footer-col h4{
  font-size:15px;
  color:var(--text);
  margin-bottom:18px;
  letter-spacing:.4px;
}
.footer-col ul{display:grid;gap:12px;}
.footer-col a{color:var(--text-2);font-size:14.5px;}
.footer-col a:hover{color:var(--brand);}
.footer-contact li{
  display:flex;
  gap:12px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.7;
}
.footer-contact .k{
  flex:0 0 42px;
  color:var(--text-3);
}
.footer-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  border-top:1px solid var(--line);
  font-size:13.5px;
  color:var(--text-3);
  flex-wrap:wrap;
}
.footer-bar .links{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.to-top{color:var(--text-2);}
.to-top:hover{color:var(--brand);}

/* ============ RESPONSIVE ============ */
@media (max-width:1279px){
  .container{padding:0 32px;}
  .nav__link{padding:10px 11px;font-size:14px;}
  .scene{gap:40px;}
}
@media (max-width:1023px){
  .nav__links{
    position:fixed;
    top:68px;right:0;
    width:290px;
    height:calc(100vh - 68px);
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:20px;
    margin-left:0;
    background:rgba(8,14,24,.97);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-left:1px solid var(--line);
    transform:translateX(102%);
    transition:transform 260ms cubic-bezier(.4,0,.2,1);
    overflow-y:auto;
    z-index:70;
  }
  .nav__links.is-open{transform:translateX(0);}
  .nav__link{padding:14px 12px;font-size:15.5px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav__link::after{display:none;}
  .nav__link.is-active{color:var(--brand);}
  .nav-toggle{display:grid;}
  .scene{grid-template-columns:1fr;gap:28px;}
  .scene--flip .scene__media{order:1;}
  .scene--flip .scene__body{order:2;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .glass-bar{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .page-banner{padding:64px 0 44px;}
  .page-banner h1{font-size:30px;}
  .lead{font-size:15.5px;}
  .glass-bar{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-band__inner{padding:56px 0;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{flex:1 1 46%;}
  .footer-bar{flex-direction:column;align-items:flex-start;gap:12px;}
}
@media (max-width:520px){
  .nav__right .btn--primary{display:none;}
  .scene__media{aspect-ratio:4/3;}
  .faq__q{font-size:15.5px;}
  .metric .num{font-size:32px;}
  .cta-band__actions .btn{flex:1 1 100%;}
}
@media (max-width:424px){
  .brand__text{font-size:15px;}
  .badge{font-size:12.5px;padding:7px 11px;}
  .footer-contact li{flex-direction:column;gap:2px;}
  .footer-contact .k{flex:none;}
}

/* roulang page: category3 */
:root{
  --bg:#060B14;
  --bg-2:#0B1420;
  --panel:#0E1725;
  --glass:rgba(255,255,255,.04);
  --primary:#1FD1E8;
  --primary-dark:#0E93A8;
  --iris:#7C8BFF;
  --amber:#FFB020;
  --danger:#FF6B6B;
  --text:#E8EEF7;
  --text-2:#A6B4C8;
  --text-3:#6E7E96;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --line-cyan:rgba(31,209,232,.45);
  --radius:18px;
  --radius-sm:12px;
  --radius-xs:8px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-soft:0 12px 34px rgba(0,0,0,.35);
  --glow:0 0 24px rgba(31,209,232,.35);
  --container:1240px;
  --font:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
*{margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(900px 520px at 10% -10%, rgba(31,209,232,.10), transparent 62%),
    radial-gradient(760px 480px at 94% 2%, rgba(124,139,255,.09), transparent 60%),
    linear-gradient(180deg,#060B14 0%,#070D18 42%,#060B14 100%);
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(circle at 50% 0%, rgba(0,0,0,.9), transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 0%, rgba(0,0,0,.9), transparent 78%);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,opacity .18s ease;}
a:hover{color:var(--primary);}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(31,209,232,.32);color:#fff;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 48px;
  position:relative;
  z-index:1;
}

/* ============ header / nav ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(6,11,20,.78);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 14px 40px rgba(0,0,0,.38);
}
.site-header .container{height:68px;display:flex;align-items:center;}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand__mark{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:15px;font-weight:800;color:#04121A;letter-spacing:-.02em;
  background:linear-gradient(145deg,#3BE2F5,#0E93A8);
  box-shadow:0 0 18px rgba(31,209,232,.4);
}
.brand__text{font-size:16px;font-weight:700;letter-spacing:.2px;white-space:nowrap;}
.brand__text .c1{color:var(--primary);}
.brand__text .c2{color:var(--text);}
.nav__links{display:flex;align-items:center;gap:4px;margin-left:26px;}
.nav__link{
  position:relative;
  padding:9px 12px;
  font-size:14px;
  color:var(--text-2);
  border-radius:10px;
  white-space:nowrap;
  transition:color .18s ease,background .18s ease;
}
.nav__link:hover{color:var(--primary);background:rgba(31,209,232,.07);}
.nav__link:active{background:rgba(31,209,232,.12);}
.nav__link.is-active{color:var(--text);}
.nav__link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px rgba(31,209,232,.75);
}
.nav__right{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.icon-btn{
  width:38px;height:38px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-2);border:1px solid var(--line);background:rgba(255,255,255,.02);
  transition:color .18s ease,border-color .18s ease,background .18s ease,transform .18s ease;
}
.icon-btn:hover{color:var(--primary);border-color:var(--line-cyan);background:rgba(31,209,232,.08);}
.icon-btn:active{transform:translateY(1px);}
.nav-toggle{display:none;}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:12px;border:1px solid transparent;
  font-size:14.5px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease,filter .18s ease;
}
.btn--primary{
  background:linear-gradient(135deg,#2FDCEE,#0E93A8);
  color:#04121A;
  box-shadow:var(--glow);
}
.btn--primary:hover{filter:brightness(1.08);box-shadow:0 0 40px rgba(31,209,232,.5);transform:translateY(-1px);color:#04121A;}
.btn--primary:active{transform:translateY(1px);box-shadow:0 0 16px rgba(31,209,232,.3);}
.btn--ghost{
  background:transparent;border-color:var(--line-2);color:var(--text-2);
}
.btn--ghost:hover{border-color:var(--line-cyan);color:var(--text);background:rgba(31,209,232,.06);transform:translateY(-1px);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{padding:9px 16px;font-size:13px;border-radius:10px;}
.btn--block{width:100%;}

/* ============ hero ============ */
.page-hero{position:relative;overflow:hidden;padding:88px 0 76px;border-bottom:1px solid var(--line);}
.page-hero__bg{
  position:absolute;inset:0;z-index:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  opacity:.3;
}
.page-hero__bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(6,11,20,.97) 0%,rgba(6,11,20,.86) 44%,rgba(6,11,20,.58) 100%);
}
.page-hero__inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.18fr .82fr;gap:48px;align-items:end;
}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px;flex-wrap:wrap;}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{color:var(--text-3);opacity:.6;}
.tagline{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;border:1px solid var(--line-cyan);
  background:rgba(31,209,232,.07);color:var(--primary);
  font-size:12.5px;letter-spacing:.04em;margin-bottom:20px;
}
.tagline .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px rgba(31,209,232,.9);}
.page-hero h1{
  font-size:clamp(30px,4vw,50px);
  line-height:1.26;
  letter-spacing:-.01em;
  font-weight:800;
  margin-bottom:20px;
}
.page-hero h1 em{font-style:normal;color:var(--primary);}
.page-hero__sub{font-size:17px;color:var(--text-2);line-height:1.85;max-width:620px;}
.page-hero__actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap;}
.hero-panel{
  background:var(--glass);
  border:1px solid var(--line);
  border-top-color:rgba(255,255,255,.16);
  border-radius:var(--radius);
  padding:26px 26px 22px;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.hero-panel h3{font-size:13px;letter-spacing:.14em;color:var(--text-3);font-weight:600;margin-bottom:16px;text-transform:uppercase;}
.hero-panel__row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:12px 0;border-top:1px solid var(--line);}
.hero-panel__row:first-of-type{border-top:0;}
.hero-panel__row .k{font-size:14.5px;color:var(--text-2);}
.hero-panel__row .v{font-size:16px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums;}
.hero-panel__row .v.amber{color:var(--amber);}
.hero-panel__foot{margin-top:14px;font-size:13px;color:var(--text-3);line-height:1.7;}

/* ============ sections ============ */
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head h2{
  font-size:clamp(24px,2.8vw,34px);
  line-height:1.32;font-weight:750;letter-spacing:-.01em;margin-bottom:16px;
}
.section-head p{color:var(--text-2);font-size:16px;line-height:1.85;}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.16em;color:var(--primary);
  margin-bottom:14px;font-weight:600;
}

/* ============ filter bar ============ */
.filter-bar{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding:16px 20px;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(255,255,255,.03);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  margin-bottom:26px;
}
.filter-tabs{display:flex;gap:8px;flex-wrap:wrap;}
.filter-tab{
  padding:9px 16px;border-radius:999px;border:1px solid var(--line);
  font-size:13.5px;color:var(--text-2);background:rgba(255,255,255,.02);
  transition:all .18s ease;white-space:nowrap;
}
.filter-tab:hover{color:var(--text);border-color:var(--line-2);background:rgba(255,255,255,.05);}
.filter-tab:active{transform:translateY(1px);}
.filter-tab.is-active{
  color:#04121A;background:linear-gradient(135deg,#2FDCEE,#0E93A8);
  border-color:transparent;box-shadow:var(--glow);font-weight:600;
}
.filter-note{font-size:13.5px;color:var(--text-3);line-height:1.7;transition:color .2s ease;}
.filter-note strong{color:var(--primary);font-weight:600;}

/* ============ compare ============ */
.compare{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  background:rgba(255,255,255,.025);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.compare__row{display:grid;grid-template-columns:1.12fr 1fr 1fr 1fr;border-top:1px solid var(--line);}
.compare__row:first-child{border-top:0;}
.compare__label{
  padding:20px 22px;font-size:15px;color:var(--text);font-weight:600;
  display:flex;flex-direction:column;gap:6px;justify-content:center;
}
.compare__label span{font-size:12.5px;color:var(--text-3);font-weight:400;line-height:1.6;}
.compare__col{
  padding:20px 22px;font-size:14.5px;color:var(--text-2);
  border-left:1px solid var(--line);
  display:flex;align-items:center;gap:9px;line-height:1.7;
}
.compare__col.is-featured{
  background:rgba(31,209,232,.06);
  border-left:1px solid var(--line-cyan);
  border-right:1px solid var(--line-cyan);
  color:var(--text);
}
.compare__head .compare__col{
  align-items:flex-start;flex-direction:column;gap:10px;padding:26px 22px 24px;
}
.compare__head .compare__label{color:var(--text-3);font-size:13px;letter-spacing:.1em;font-weight:600;}
.tier-name{font-size:17px;font-weight:750;color:var(--text);display:flex;align-items:center;gap:10px;}
.tier-price{font-size:26px;font-weight:800;color:var(--text);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.tier-price small{font-size:13px;font-weight:500;color:var(--text-3);margin-left:2px;}
.is-featured .tier-price{color:var(--amber);}
.tier-desc{font-size:13px;color:var(--text-3);line-height:1.7;}
.badge-rec{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
  font-size:11.5px;font-weight:700;color:#241500;
  background:linear-gradient(135deg,#FFC85A,#FFB020);
  box-shadow:0 0 16px rgba(255,176,32,.35);
}
.dot-flag{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px rgba(31,209,232,.9);flex:0 0 auto;}
.dot-flag--amber{background:var(--amber);box-shadow:0 0 8px rgba(255,176,32,.85);}
.compare-legend{
  display:flex;gap:26px;flex-wrap:wrap;margin-top:20px;font-size:13px;color:var(--text-3);
}
.compare-legend span{display:inline-flex;align-items:center;gap:8px;}

/* ============ spec blocks ============ */
.spec-block{
  display:grid;grid-template-columns:250px 1fr;gap:36px;
  padding:34px 0;border-top:1px solid var(--line);
}
.spec-block:first-of-type{border-top:0;padding-top:0;}
.spec-block__head .idx{
  font-size:13px;letter-spacing:.18em;color:var(--primary);font-weight:700;
  display:block;margin-bottom:12px;
}
.spec-block__head h3{font-size:20px;font-weight:700;line-height:1.5;margin-bottom:10px;}
.spec-block__head p{font-size:14px;color:var(--text-3);line-height:1.8;}
.spec-list{display:flex;flex-direction:column;}
.spec-item{
  display:grid;grid-template-columns:170px 1fr;gap:20px;
  padding:14px 0;border-top:1px dashed rgba(255,255,255,.08);
}
.spec-item:first-child{border-top:0;padding-top:0;}
.spec-item .k{font-size:14.5px;color:var(--text-2);}
.spec-item .v{font-size:14.5px;color:var(--text);line-height:1.8;}
.spec-item .v code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;padding:2px 7px;border-radius:6px;
  background:rgba(31,209,232,.1);color:var(--primary);border:1px solid rgba(31,209,232,.2);
}

/* ============ choose ============ */
.choose{display:grid;grid-template-columns:1fr 1.05fr;gap:52px;align-items:center;}
.choose__media{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);}
.choose__media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.choose__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,11,20,0) 42%,rgba(6,11,20,.72) 100%);}
.choose__cap{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
  font-size:13.5px;color:var(--text-2);line-height:1.7;
}
.choose-list{display:flex;flex-direction:column;gap:18px;}
.choose-item{
  display:grid;grid-template-columns:44px 1fr;gap:16px;
  padding:18px 20px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:rgba(255,255,255,.025);
  transition:border-color .18s ease,transform .18s ease,background .18s ease;
}
.choose-item:hover{border-color:rgba(31,209,232,.3);transform:translateY(-2px);background:rgba(31,209,232,.04);}
.choose-item .num{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  font-size:15px;font-weight:800;font-variant-numeric:tabular-nums;
  color:var(--primary);background:rgba(31,209,232,.1);border:1px solid rgba(31,209,232,.24);
}
.choose-item h4{font-size:16.5px;font-weight:700;margin-bottom:6px;}
.choose-item p{font-size:14px;color:var(--text-2);line-height:1.8;}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step;}
.step{
  position:relative;padding:28px 24px 26px;border-radius:var(--radius);
  border:1px solid var(--line);background:rgba(255,255,255,.025);
  transition:border-color .18s ease,transform .18s ease;
}
.step:hover{border-color:rgba(31,209,232,.3);transform:translateY(-2px);}
.step__idx{
  font-size:34px;font-weight:800;line-height:1;color:transparent;
  -webkit-text-stroke:1px rgba(31,209,232,.55);
  letter-spacing:-.02em;margin-bottom:16px;font-variant-numeric:tabular-nums;
}
.step h3{font-size:16.5px;font-weight:700;margin-bottom:10px;}
.step p{font-size:14px;color:var(--text-2);line-height:1.8;}

/* ============ faq ============ */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;text-align:left;font-size:16.5px;font-weight:650;color:var(--text);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--primary);}
.faq-q:active{color:var(--primary-dark);}
.faq-q .chev{flex:0 0 auto;color:var(--text-3);transition:transform .2s ease,color .2s ease;}
.faq-item.is-open .faq-q{color:var(--primary);}
.faq-item.is-open .faq-q .chev{transform:rotate(180deg);color:var(--primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease;}
.faq-a p{padding:0 4px 24px;font-size:15px;color:var(--text-2);line-height:1.9;max-width:860px;}

/* ============ cta ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:22px;
  border:1px solid rgba(31,209,232,.28);
  background:
    radial-gradient(600px 300px at 12% 0%, rgba(31,209,232,.16), transparent 66%),
    radial-gradient(520px 280px at 92% 100%, rgba(124,139,255,.14), transparent 66%),
    rgba(255,255,255,.03);
  padding:56px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:750;line-height:1.36;margin-bottom:12px;}
.cta-band p{font-size:15px;color:var(--text-2);line-height:1.85;max-width:620px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ footer ============ */
.site-footer{
  margin-top:104px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,20,32,.6),rgba(6,11,20,.95));
  padding-top:64px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-3);line-height:1.85;max-width:320px;}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--primary);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7;}
.footer-contact .k{color:var(--text-3);flex:0 0 42px;}
.footer-bar{
  margin-top:52px;padding:22px 0 30px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bar .links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.to-top{color:var(--text-2);}
.to-top:hover{color:var(--primary);}

/* ============ responsive ============ */
@media (max-width:1279px){
  .nav__link{padding:9px 10px;font-size:13.5px;}
  .page-hero{padding:76px 0 64px;}
}
@media (max-width:1023px){
  .container{padding:0 32px;}
  .nav__links{
    position:fixed;top:0;right:0;height:100vh;width:min(84vw,340px);
    flex-direction:column;align-items:stretch;gap:6px;margin-left:0;
    padding:92px 24px 32px;overflow-y:auto;
    background:rgba(8,14,24,.97);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-left:1px solid var(--line);
    transform:translateX(102%);transition:transform .28s ease;z-index:70;
    box-shadow:-20px 0 60px rgba(0,0,0,.5);
  }
  .nav__links.is-open{transform:translateX(0);}
  .nav__link{width:100%;padding:13px 14px;font-size:15px;}
  .nav__link.is-active::after{left:14px;right:auto;width:22px;bottom:8px;}
  .nav-toggle{display:inline-flex;}
  .page-hero__inner{grid-template-columns:1fr;align-items:start;gap:36px;}
  .compare__row{grid-template-columns:1fr 1fr 1fr 1fr;}
  .choose{grid-template-columns:1fr;gap:36px;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .spec-block{grid-template-columns:1fr;gap:18px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:767px){
  body{font-size:15.5px;}
  .container{padding:0 20px;}
  .section{padding:64px 0;}
  .section--tight{padding:52px 0;}
  .page-hero{padding:56px 0 48px;}
  .page-hero h1{font-size:clamp(26px,7vw,32px);}
  .page-hero__sub{font-size:15.5px;}
  .page-hero__actions .btn{flex:1 1 auto;}
  .compare{border-radius:14px;}
  .compare__head{display:none;}
  .compare__row{grid-template-columns:1fr;border-top:1px solid var(--line);padding:12px 0 6px;}
  .compare__row:first-child{border-top:0;}
  .compare__label{padding:6px 18px 4px;font-size:14.5px;}
  .compare__col{
    border-left:0;padding:10px 18px;font-size:14px;border-radius:0;
    justify-content:space-between;
  }
  .compare__col::before{
    content:attr(data-tier);
    font-size:12.5px;color:var(--text-3);flex:0 0 auto;margin-right:12px;
  }
  .compare__col.is-featured{
    background:rgba(31,209,232,.06);
    border-left:3px solid rgba(31,209,232,.5);
    border-right:0;
  }
  .filter-bar{flex-direction:column;align-items:flex-start;}
  .steps{grid-template-columns:1fr;}
  .spec-item{grid-template-columns:1fr;gap:6px;}
  .choose-item{grid-template-columns:38px 1fr;padding:16px;}
  .choose-item .num{width:38px;height:38px;font-size:14px;}
  .cta-band{padding:36px 24px;border-radius:18px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bar{flex-direction:column;align-items:flex-start;}
  .site-footer{margin-top:72px;}
}
@media (max-width:424px){
  .brand__text{font-size:14.5px;}
  .icon-btn{width:34px;height:34px;}
  .compare-legend{gap:14px;font-size:12.5px;}
  .tier-price{font-size:22px;}
}

/* roulang page: category4 */
:root{
  --bg:#060B14;
  --bg-2:#0B1420;
  --panel:#0E1725;
  --panel-2:rgba(255,255,255,.04);
  --cyan:#1FD1E8;
  --cyan-deep:#0E93A8;
  --violet:#7C8BFF;
  --amber:#FFB020;
  --danger:#FF6B6B;
  --txt:#E8EEF7;
  --txt-2:#A6B4C8;
  --txt-3:#6E7E96;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --line-cyan:rgba(31,209,232,.45);
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --r-pill:999px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-sm:0 8px 28px rgba(0,0,0,.35);
  --glow:0 0 24px rgba(31,209,232,.35);
  --glow-lg:0 0 40px rgba(31,209,232,.42);
  --ease:180ms cubic-bezier(.4,0,.2,1);
  --font:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--txt);
  background:var(--bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(900px 520px at 18% -8%, rgba(31,209,232,.13), transparent 62%),
    radial-gradient(760px 480px at 96% 6%, rgba(124,139,255,.10), transparent 60%),
    linear-gradient(rgba(31,209,232,.032) 1px,transparent 1px),
    linear-gradient(90deg,rgba(31,209,232,.032) 1px,transparent 1px);
  background-size:auto,auto,72px 72px,72px 72px;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--txt-2);text-decoration:none;transition:color var(--ease),border-color var(--ease);}
a:hover{color:var(--cyan);}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:700;letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 48px;
  position:relative;
  z-index:1;
}
.section{padding:104px 0;}
.section--tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan);font-weight:600;margin-bottom:16px;
}
.section-head .eyebrow::before{
  content:"";width:22px;height:2px;background:var(--cyan);border-radius:2px;
  box-shadow:0 0 12px rgba(31,209,232,.7);
}
.section-head h2{font-size:34px;margin-bottom:14px;}
.section-head p{color:var(--txt-2);font-size:16px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:68px;
  display:flex;align-items:center;
  background:linear-gradient(180deg,rgba(6,11,20,.92),rgba(6,11,20,.62));
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),backdrop-filter var(--ease);
}
.site-header.is-scrolled{
  background:rgba(8,14,24,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 36px rgba(0,0,0,.4);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand__mark{
  width:32px;height:32px;border-radius:10px;
  display:grid;place-items:center;
  font-weight:800;font-size:16px;color:#04121A;
  background:linear-gradient(140deg,var(--cyan),#7ff0ff 60%,var(--cyan-deep));
  box-shadow:0 0 18px rgba(31,209,232,.45);
}
.brand__text{font-size:16px;font-weight:700;letter-spacing:.2px;white-space:nowrap;}
.brand__text .c1{color:var(--cyan);}
.brand__text .c2{color:var(--txt);}
.brand:hover .brand__text .c2{color:#fff;}
.nav__links{display:flex;align-items:center;gap:4px;margin-left:26px;}
.nav__link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:14.5px;
  color:var(--txt-2);
  border-radius:8px;
  white-space:nowrap;
}
.nav__link:hover{color:var(--cyan);background:rgba(31,209,232,.07);}
.nav__link.is-active{color:var(--txt);}
.nav__link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--cyan);border-radius:2px;box-shadow:0 0 10px rgba(31,209,232,.85);
}
.nav__right{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.icon-btn{
  width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;
  color:var(--txt-2);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  transition:all var(--ease);
}
.icon-btn:hover{color:var(--cyan);border-color:var(--line-cyan);background:rgba(31,209,232,.08);}
.icon-btn:active{transform:translateY(1px);}
.nav-toggle{display:none;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;
  font-size:15px;font-weight:600;
  border-radius:var(--r-pill);
  transition:all var(--ease);
  text-align:center;
  white-space:nowrap;
}
.btn--primary{
  color:#03141B;
  background:linear-gradient(135deg,var(--cyan),#63e6f7 55%,var(--cyan-deep));
  box-shadow:var(--glow);
}
.btn--primary:hover{
  color:#03141B;
  filter:brightness(1.08);
  box-shadow:var(--glow-lg);
  transform:translateY(-1px);
}
.btn--primary:active{transform:translateY(1px);box-shadow:0 0 14px rgba(31,209,232,.3);}
.btn--ghost{
  color:var(--txt);
  border:1px solid var(--line-2);
  background:transparent;
}
.btn--ghost:hover{
  color:var(--cyan);
  border-color:var(--line-cyan);
  background:rgba(31,209,232,.07);
  transform:translateY(-1px);
}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{padding:9px 18px;font-size:14px;}
.btn:disabled{opacity:.45;box-shadow:none;cursor:not-allowed;}

/* ============ 面包屑 ============ */
.crumbs{padding:104px 0 0;}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--txt-3);}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:var(--txt-3);opacity:.6;}
.crumbs a{color:var(--txt-2);}
.crumbs a:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:4px;}
.crumbs .current{color:var(--txt);}

/* ============ 页面头部 + 搜索 ============ */
.page-hero{padding:42px 0 64px;}
.page-hero__grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:48px;
  align-items:center;
}
.page-hero h1{font-size:44px;margin-bottom:18px;}
.page-hero h1 .accent{color:var(--cyan);}
.page-hero .lead{color:var(--txt-2);font-size:17px;max-width:600px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;
  font-size:13px;
  color:var(--txt-2);
  border:1px solid var(--line-2);
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.02);
}
.badge--cyan{color:var(--cyan);border-color:var(--line-cyan);background:rgba(31,209,232,.08);}
.badge--amber{color:var(--amber);border-color:rgba(255,176,32,.4);background:rgba(255,176,32,.08);}
.hero-visual{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  aspect-ratio:4/3;
  background:var(--panel);
}
.hero-visual img{width:100%;height:100%;object-fit:cover;opacity:.9;}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,.15),rgba(6,11,20,.78));
}
.hero-float{
  position:absolute;left:20px;bottom:20px;right:20px;
  display:flex;gap:12px;flex-wrap:wrap;
  padding:14px 16px;
  border-radius:var(--r-md);
  background:rgba(14,23,37,.62);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line-2);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  z-index:2;
}
.hero-float .cell{min-width:96px;}
.hero-float .num{
  font-size:19px;font-weight:700;color:var(--cyan);
  font-variant-numeric:tabular-nums;letter-spacing:.4px;
}
.hero-float .lbl{font-size:12.5px;color:var(--txt-3);line-height:1.5;}

.search-panel{
  margin-top:36px;
  padding:22px 24px;
  border-radius:var(--r-lg);
  background:rgba(255,255,255,.04);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07),var(--shadow-sm);
}
.search-panel form{display:flex;gap:12px;align-items:center;}
.search-field{
  flex:1;
  display:flex;align-items:center;gap:10px;
  padding:0 16px;
  height:52px;
  border-radius:var(--r-pill);
  background:rgba(6,11,20,.66);
  border:1px solid var(--line-2);
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.search-field svg{color:var(--txt-3);flex-shrink:0;}
.search-field input{
  flex:1;min-width:0;height:100%;
  background:transparent;border:0;outline:none;
  color:var(--txt);font-size:15.5px;
}
.search-field input::placeholder{color:var(--txt-3);}
.search-field:focus-within{
  border-color:var(--line-cyan);
  background:rgba(6,11,20,.86);
  box-shadow:0 0 0 3px rgba(31,209,232,.12),0 0 26px rgba(31,209,232,.22);
}
.search-hint{font-size:13px;color:var(--txt-3);margin-top:12px;display:flex;flex-wrap:wrap;gap:8px;}
.search-hint a{
  padding:3px 10px;border-radius:var(--r-pill);
  border:1px solid var(--line);font-size:12.5px;
}
.search-hint a:hover{border-color:var(--line-cyan);color:var(--cyan);}

/* ============ 四宫格快捷入口 ============ */
.quick-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.quick-card{
  display:flex;flex-direction:column;gap:12px;
  padding:26px 24px;
  border-radius:var(--r-md);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  transition:transform var(--ease),border-color var(--ease),background var(--ease),box-shadow var(--ease);
}
.quick-card:hover{
  transform:translateY(-2px);
  border-color:rgba(31,209,232,.32);
  background:rgba(31,209,232,.05);
  box-shadow:var(--shadow-sm);
}
.quick-card .ico{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;
  color:var(--cyan);
  background:rgba(31,209,232,.1);
  border:1px solid rgba(31,209,232,.24);
}
.quick-card h3{font-size:17.5px;}
.quick-card p{font-size:14.5px;color:var(--txt-2);line-height:1.7;}
.quick-card .go{
  margin-top:auto;font-size:13.5px;color:var(--cyan);font-weight:600;
  display:inline-flex;align-items:center;gap:6px;
}
.quick-card:hover .go{gap:10px;}

/* ============ FAQ 分组折叠 ============ */
.faq-wrap{display:grid;grid-template-columns:220px 1fr;gap:44px;align-items:start;}
.faq-index{position:sticky;top:104px;}
.faq-index .label{
  font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--txt-3);margin-bottom:14px;
}
.faq-index a{
  display:block;
  padding:9px 12px;
  font-size:14.5px;
  border-left:2px solid var(--line);
  color:var(--txt-2);
  transition:all var(--ease);
}
.faq-index a:hover{color:var(--cyan);border-left-color:var(--line-cyan);background:rgba(31,209,232,.05);}
.faq-groups{display:flex;flex-direction:column;gap:44px;}
.faq-group__head{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.faq-group__head .idx{
  font-size:13px;font-weight:700;color:var(--cyan);
  font-variant-numeric:tabular-nums;
  padding:2px 9px;border-radius:6px;
  border:1px solid var(--line-cyan);background:rgba(31,209,232,.08);
}
.faq-group__head h3{font-size:21px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 4px;
  font-size:16.5px;font-weight:600;color:var(--txt);
  cursor:pointer;
  transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--cyan);}
.faq-item summary .arrow{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line-2);color:var(--txt-2);
  transition:transform var(--ease),color var(--ease),border-color var(--ease);
}
.faq-item[open] summary .arrow{transform:rotate(90deg);color:var(--cyan);border-color:var(--line-cyan);}
.faq-item .answer{
  padding:0 4px 22px;
  color:var(--txt-2);font-size:15.5px;line-height:1.85;
  max-width:820px;
}
.faq-item .answer strong{color:var(--txt);font-weight:600;}

/* ============ 资源清单 ============ */
.res-list{
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(255,255,255,.028);
  overflow:hidden;
}
.res-row{
  display:grid;
  grid-template-columns:46px 1.1fr 1.6fr auto;
  gap:20px;
  align-items:center;
  padding:20px 24px;
  border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.res-row:last-child{border-bottom:0;}
.res-row:hover{background:rgba(31,209,232,.055);}
.res-row .ico{
  width:40px;height:40px;border-radius:11px;
  display:grid;place-items:center;
  color:var(--cyan);background:rgba(31,209,232,.09);
  border:1px solid rgba(31,209,232,.22);
}
.res-row .name{font-size:16px;font-weight:600;color:var(--txt);}
.res-row .desc{font-size:14.5px;color:var(--txt-2);line-height:1.7;}
.res-row .act{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;font-weight:600;color:var(--cyan);
  padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid var(--line-cyan);
  background:rgba(31,209,232,.07);
  transition:all var(--ease);
  white-space:nowrap;
}
.res-row .act:hover{background:rgba(31,209,232,.16);box-shadow:0 0 20px rgba(31,209,232,.25);}
.res-row .act:active{transform:translateY(1px);}

/* ============ 支持通道 ============ */
.support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.support-card{
  padding:28px 26px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.018));
  position:relative;
  overflow:hidden;
}
.support-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--cyan);box-shadow:0 0 18px rgba(31,209,232,.8);
}
.support-card h3{font-size:18px;margin-bottom:10px;}
.support-card p{font-size:14.5px;color:var(--txt-2);line-height:1.75;margin-bottom:16px;}
.support-card .meta{
  font-size:13px;color:var(--txt-3);
  font-variant-numeric:tabular-nums;
  border-top:1px solid var(--line);
  padding-top:14px;
}

/* ============ 底部 CTA ============ */
.cta-band{
  border-radius:var(--r-lg);
  border:1px solid var(--line-cyan);
  background:
    radial-gradient(680px 260px at 12% 0%,rgba(31,209,232,.16),transparent 62%),
    linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  padding:52px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:30px;margin-bottom:12px;}
.cta-band p{color:var(--txt-2);font-size:16px;max-width:620px;}
.cta-band .actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:104px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,20,32,.7),rgba(6,11,20,.98));
  padding-top:64px;
  position:relative;z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand p{color:var(--txt-3);font-size:14.5px;line-height:1.8;margin-top:16px;max-width:340px;}
.footer-col h4{font-size:15px;color:var(--txt);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14.5px;color:var(--txt-2);}
.footer-col a:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:4px;}
.footer-contact li{display:flex;gap:10px;font-size:14.5px;color:var(--txt-2);line-height:1.7;}
.footer-contact .k{color:var(--txt-3);flex-shrink:0;}
.footer-bar{
  border-top:1px solid var(--line);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13.5px;color:var(--txt-3);
}
.footer-bar .links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.footer-bar .to-top{color:var(--txt-2);}
.footer-bar .to-top:hover{color:var(--cyan);}

/* ============ 移动端抽屉 ============ */
@media (max-width:1023px){
  .nav__links{
    position:fixed;
    top:0;right:0;
    height:100vh;width:min(330px,86vw);
    margin-left:0;
    padding:88px 22px 32px;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    background:rgba(9,16,27,.97);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-left:1px solid var(--line);
    box-shadow:-24px 0 60px rgba(0,0,0,.55);
    transform:translateX(102%);
    transition:transform 240ms cubic-bezier(.4,0,.2,1);
    z-index:90;
    overflow-y:auto;
  }
  .nav__links.is-open{transform:translateX(0);}
  .nav__link{padding:13px 12px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav__link.is-active::after{display:none;}
  .nav__link.is-active{color:var(--cyan);}
  .nav-toggle{display:grid;}
  .nav__right .btn--sm{display:none;}

  .container{padding:0 32px;}
  .page-hero__grid{grid-template-columns:1fr;gap:36px;}
  .page-hero h1{font-size:36px;}
  .quick-grid{grid-template-columns:repeat(2,1fr);}
  .faq-wrap{grid-template-columns:1fr;gap:28px;}
  .faq-index{position:static;display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
  .faq-index .label{width:100%;margin-bottom:6px;}
  .faq-index a{border-left:0;border:1px solid var(--line);border-radius:var(--r-pill);padding:7px 14px;}
  .res-row{grid-template-columns:46px 1fr auto;grid-template-areas:"ico name act" "ico desc desc";}
  .res-row .ico{grid-area:ico;}
  .res-row .name{grid-area:name;}
  .res-row .desc{grid-area:desc;}
  .res-row .act{grid-area:act;}
  .support-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .section{padding:76px 0;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .crumbs{padding-top:92px;}
  .page-hero{padding:30px 0 48px;}
  .page-hero h1{font-size:30px;}
  .page-hero .lead{font-size:15.5px;}
  .section-head h2{font-size:27px;}
  .search-panel{padding:18px;}
  .search-panel form{flex-direction:column;align-items:stretch;}
  .search-field{width:100%;}
  .search-panel .btn{width:100%;}
  .quick-grid{grid-template-columns:1fr;}
  .res-row{grid-template-columns:40px 1fr;grid-template-areas:"ico name" "desc desc" "act act";gap:14px;padding:18px;}
  .res-row .act{justify-content:center;}
  .cta-band{padding:34px 24px;}
  .cta-band h2{font-size:25px;}
  .cta-band .actions{width:100%;}
  .cta-band .actions .btn{flex:1;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bar{flex-direction:column;align-items:flex-start;gap:10px;}
  .section{padding:60px 0;}
  .footer-brand p{max-width:none;}
}
@media (max-width:424px){
  .brand__text{font-size:14.5px;}
  .quick-card{padding:22px 20px;}
  .faq-item summary{font-size:15.5px;gap:12px;}
  .search-hint{display:none;}
}