/* roulang page: index */
:root{
  --bg:#050A13;
  --panel:#08111F;
  --panel-2:#0C1726;
  --line:rgba(120,190,255,0.14);
  --brand:#2FA8FF;
  --brand-600:#1B8FE6;
  --jade:#35E0C4;
  --amber:#FFB646;
  --text:#E9F2FB;
  --text-2:#9FB3C8;
  --text-3:#6C8098;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 8px 24px rgba(0,0,0,.35);
  --shadow-glow:0 0 0 1px rgba(47,168,255,.55),0 10px 30px rgba(47,168,255,.32);
  --gap-section:clamp(56px,8vw,112px);
}
*,*::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',Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--jade);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
button,input{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;color:var(--text)}
h1{font-size:clamp(28px,4.4vw,52px);font-weight:700}
h2{font-size:clamp(22px,2.6vw,32px);font-weight:650}
h3{font-size:18px;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--jade);outline-offset:2px;border-radius:6px}
::selection{background:rgba(47,168,255,.35)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#050A13}
::-webkit-scrollbar-thumb{background:#16304d;border-radius:20px}
::-webkit-scrollbar-thumb:hover{background:#20507d}

.wrap{width:100%;max-width:1240px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:1024px){.wrap{padding-left:32px;padding-right:32px}}
.section{padding-top:var(--gap-section);padding-bottom:var(--gap-section)}
.section-tight{padding-top:clamp(40px,5vw,72px);padding-bottom:clamp(40px,5vw,72px)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--jade);letter-spacing:.08em;
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(53,224,196,.28);
  background:rgba(53,224,196,.06);
}
.section-head{max-width:760px;margin-bottom:clamp(28px,4vw,48px)}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--text-2);font-size:15px}
.muted{color:var(--text-2)}
.dim{color:var(--text-3)}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,19,.72);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(18,32,52,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(255,255,255,.04) inset,0 12px 30px rgba(0,0,0,.35);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--text);letter-spacing:-.01em}
.logo:hover{text-decoration:none}
.logo-mark{
  width:36px;height:36px;border-radius:11px;flex:0 0 36px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(47,168,255,.9),rgba(53,224,196,.75));
  color:#04121E;font-size:16px;font-weight:800;
  box-shadow:0 6px 18px rgba(47,168,255,.35);
}
.main-menu{display:none;align-items:center;gap:4px}
@media (min-width:1024px){.main-menu{display:flex}}
.main-menu a{
  display:inline-block;padding:9px 13px;border-radius:9px;
  font-size:14.5px;color:var(--text-2);transition:color .18s ease,background .18s ease,transform .18s ease;
}
.main-menu a:hover{color:var(--text);background:rgba(47,168,255,.09);text-decoration:none;transform:translateY(-1px)}
.main-menu a.is-active{color:var(--text);background:rgba(47,168,255,.14)}
.nav-right{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-btn);
  font-size:14.5px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(120deg,#2FA8FF,#1B8FE6);color:#03121F;box-shadow:var(--shadow-glow)}
.btn-primary:hover{box-shadow:0 0 0 1px rgba(53,224,196,.6),0 14px 34px rgba(47,168,255,.4)}
.btn-ghost{background:rgba(47,168,255,.08);color:var(--text);border-color:var(--line)}
.btn-ghost:hover{background:rgba(47,168,255,.16);border-color:rgba(120,190,255,.4)}
.btn-amber{background:linear-gradient(120deg,#FFB646,#F09A21);color:#231402;box-shadow:0 10px 26px rgba(255,182,70,.28)}
.btn-amber:hover{box-shadow:0 0 0 1px rgba(255,182,70,.6),0 14px 30px rgba(255,182,70,.35)}
.btn-sm{padding:9px 15px;font-size:13.5px}
.burger{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:11px;border:1px solid var(--line);
  background:rgba(12,23,38,.85);color:var(--text);cursor:pointer;
}
@media (min-width:1024px){.burger{display:none}}
.mobile-panel{
  display:none;border-top:1px solid var(--line);
  background:rgba(8,17,31,.98);
  padding:12px 0 18px;
}
.mobile-panel.is-open{display:block}
.mobile-panel a{
  display:block;padding:12px 14px;border-radius:10px;color:var(--text-2);font-size:15px;
}
.mobile-panel a:hover{background:rgba(47,168,255,.1);color:var(--text);text-decoration:none}
.mobile-panel a.is-active{color:var(--text);background:rgba(47,168,255,.14)}

/* ============ hero ============ */
.hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(5,10,19,.72) 0%,rgba(5,10,19,.92) 55%,#050A13 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(900px 420px at 12% 8%,rgba(47,168,255,.18),transparent 62%),
             radial-gradient(620px 320px at 88% 78%,rgba(53,224,196,.12),transparent 65%);
}
.hero-inner{position:relative;z-index:2;display:grid;gap:clamp(28px,4vw,56px);padding:clamp(56px,8vw,104px) 0 clamp(48px,7vw,88px)}
@media (min-width:1024px){.hero-inner{grid-template-columns:1.08fr .92fr;align-items:center}}
.hero h1{margin:18px 0 16px}
.hero-lead{color:var(--text-2);font-size:16.5px;max-width:590px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-metrics{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;
  margin-top:34px;padding-top:24px;border-top:1px solid var(--line);
}
.hero-metrics .m-num{font-size:20px;font-weight:700;color:var(--jade);line-height:1.3}
.hero-metrics .m-lab{font-size:13px;color:var(--text-3)}
.glass{
  background:rgba(18,32,52,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:0 8px 30px rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.06);
}
.hero-panel{padding:16px}
.hero-panel img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-img)}
.hero-panel .panel-list{margin-top:14px;display:grid;gap:10px}
.hero-panel .panel-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--text-2);
  padding:10px 12px;border-radius:10px;background:rgba(8,17,31,.62);border:1px solid var(--line);
}
.hero-panel .panel-list i{color:var(--jade);margin-top:4px}

/* ============ claim strip ============ */
.claim-grid{display:grid;gap:20px}
@media (min-width:768px){.claim-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.claim{display:flex;gap:16px;padding:24px 0;border-top:1px solid var(--line)}
.claim .num{font-size:26px;font-weight:700;color:rgba(47,168,255,.65);line-height:1;letter-spacing:-.02em;min-width:48px}
.claim h3{margin-bottom:8px;font-size:17px}
.claim p{color:var(--text-2);font-size:14.5px}

/* ============ story ============ */
.story-grid{display:grid;gap:clamp(24px,3.5vw,48px);align-items:center}
@media (min-width:1024px){.story-grid{grid-template-columns:7fr 5fr}}
.quote{
  margin:26px 0 0;padding:18px 20px;
  border-left:3px solid var(--brand);
  background:rgba(12,23,38,.9);border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:var(--text);font-size:15.5px;
}
.story-list{margin-top:24px;display:grid;gap:12px}
.story-list li{display:flex;gap:12px;color:var(--text-2);font-size:15px}
.story-list i{color:var(--jade);margin-top:6px}
.story-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-card);border:1px solid var(--line);box-shadow:var(--shadow-card)}

/* ============ feature cards 2+1 ============ */
.feat-grid{display:grid;gap:24px}
@media (min-width:1024px){
  .feat-grid{grid-template-columns:1.35fr 1fr;grid-template-rows:auto auto}
  .feat-main{grid-row:span 2}
}
.card{
  display:block;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
  color:inherit;
}
.card:hover{transform:translateY(-2px);border-color:rgba(120,190,255,.36);text-decoration:none;box-shadow:0 14px 34px rgba(0,0,0,.45)}
.card:active{transform:translateY(1px)}
.card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.card-body{padding:22px}
.card-body h3{margin-bottom:10px}
.card-body p{color:var(--text-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;gap:12px;margin-top:16px;font-size:13px;color:var(--text-3)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12.5px;
  background:rgba(47,168,255,.12);color:#8FD0FF;border:1px solid rgba(47,168,255,.24);
}
.tag-jade{background:rgba(53,224,196,.1);color:var(--jade);border-color:rgba(53,224,196,.24)}
.tag-amber{background:rgba(255,182,70,.1);color:var(--amber);border-color:rgba(255,182,70,.26)}

/* ============ news (cms) ============ */
.news-grid{display:grid;gap:22px}
@media (min-width:640px){.news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.news-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;color:inherit;
  transition:transform .18s ease-out,border-color .18s ease-out;
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(120,190,255,.36);text-decoration:none}
.news-card:active{transform:translateY(1px)}
.news-card h3{font-size:17px;margin:14px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card p{color:var(--text-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3)}
.news-foot time{color:var(--amber)}
.news-empty{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:52px 24px;border:1px dashed rgba(120,190,255,.28);border-radius:var(--radius-card);
  background:var(--panel);color:var(--text-2);text-align:center;
}
.news-empty i{font-size:26px;color:var(--brand)}

/* ============ trust ============ */
.trust-grid{display:grid;gap:20px}
@media (min-width:640px){.trust-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.trust-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stat{
  padding:24px;border-radius:var(--radius-card);
  background:linear-gradient(160deg,rgba(12,23,38,.95),rgba(8,17,31,.95));
  border:1px solid var(--line);
}
.stat .s-num{font-size:28px;font-weight:700;color:var(--text);letter-spacing:-.02em}
.stat .s-num span{font-size:15px;color:var(--jade);margin-left:4px;font-weight:600}
.stat .s-lab{margin-top:6px;font-size:13.5px;color:var(--text-3)}
.trust-line{margin-top:26px;font-size:13.5px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center}
.trust-line a{color:var(--text-2)}

/* ============ faq ============ */
.faq-grid{display:grid;gap:14px}
@media (min-width:1024px){.faq-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transition:border-color .18s ease;
}
.faq-item[open]{border-color:rgba(47,168,255,.42);box-shadow:inset 3px 0 0 var(--brand)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{color:var(--brand);transition:transform .22s ease;font-size:14px}
.faq-item[open] summary i{transform:rotate(180deg)}
.faq-item .faq-body{padding:0 20px 20px;color:var(--text-2);font-size:15px}

/* ============ cta / subscribe ============ */
.cta-card{padding:clamp(26px,4vw,48px);display:grid;gap:28px}
@media (min-width:1024px){.cta-card{grid-template-columns:1.1fr .9fr;align-items:center}}
.form-row{display:flex;gap:12px;flex-wrap:wrap}
.input{
  flex:1 1 240px;min-width:0;padding:13px 16px;border-radius:var(--radius-btn);
  background:#07101d;border:1px solid var(--line);color:var(--text);font-size:14.5px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.input::placeholder{color:var(--text-3)}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,168,255,.18)}
.input.is-error{border-color:var(--amber);box-shadow:0 0 0 3px rgba(255,182,70,.16)}
.form-msg{font-size:13px;margin-top:10px;min-height:20px}
.form-msg.err{color:var(--amber)}
.form-msg.ok{color:var(--jade)}

/* ============ footer ============ */
.site-footer{margin-top:clamp(48px,7vw,96px);border-top:1px solid var(--line);background:#060d18;padding-top:clamp(40px,5vw,64px)}
.foot-grid{display:grid;gap:32px}
@media (min-width:768px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr}}
.foot-col h4{font-size:14px;color:var(--text);margin-bottom:14px;letter-spacing:.04em}
.foot-col li{margin-bottom:10px}
.foot-col a{color:var(--text-3);font-size:14px;transition:color .18s ease}
.foot-col a:hover{color:var(--brand);text-decoration:none}
.foot-brand p{color:var(--text-3);font-size:14px;margin-top:14px;max-width:360px}
.foot-acc{display:flex;align-items:center;justify-content:space-between;width:100%;background:none;border:0;color:var(--text);font-size:14px;font-weight:600;padding:12px 0;cursor:pointer}
.foot-bottom{
  margin-top:34px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.foot-bottom a{color:var(--text-3)}
.foot-body{display:block}
@media (max-width:767px){
  .foot-col .foot-body{display:none}
  .foot-col.is-open .foot-body{display:block;padding-bottom:6px}
  .foot-acc i{transition:transform .22s ease}
  .foot-col.is-open .foot-acc i{transform:rotate(180deg)}
}
@media (min-width:768px){.foot-acc{pointer-events:none}.foot-acc i{display:none}}

/* ============ mobile bottom tab ============ */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:grid;grid-template-columns:repeat(4,1fr);
  height:calc(60px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(8,17,31,.96);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
}
@media (min-width:1024px){.tabbar{display:none}}
.tabbar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11px;color:var(--text-3);position:relative;
}
.tabbar a i{font-size:22px;line-height:1}
.tabbar a:hover{text-decoration:none;color:var(--text-2)}
.tabbar a.is-active{color:var(--brand)}
.tabbar a.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:34px;height:2px;border-radius:0 0 4px 4px;background:var(--brand);
  box-shadow:0 0 12px rgba(47,168,255,.9);
}
@media (max-width:1023px){body{padding-bottom:72px}}

/* ============ animate ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* roulang page: article */
:root{
  --bg:#050A13;
  --panel:#08111F;
  --panel-2:#0C1726;
  --line:rgba(120,190,255,.14);
  --line-strong:rgba(120,190,255,.28);
  --primary:#2FA8FF;
  --accent:#35E0C4;
  --amber:#FFB646;
  --text:#E9F2FB;
  --text-2:#9FB3C8;
  --text-3:#6C8098;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-card:0 8px 24px rgba(0,0,0,.35);
  --container:1240px;
  --glass:rgba(18,32,52,.55);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:var(--accent);text-decoration:none;transition:color .18s ease-out,border-color .18s ease-out,background .18s ease-out;}
a:hover{text-decoration:underline;text-underline-offset:3px;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
ul,ol{padding-left:22px;}
input,textarea{font:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(47,168,255,.35);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:#060C16;}
::-webkit-scrollbar-thumb{background:rgba(120,190,255,.22);border-radius:8px;border:2px solid #060C16;}
::-webkit-scrollbar-thumb:hover{background:rgba(120,190,255,.38);}

.wrap{width:100%;max-width:var(--container);margin:0 auto;padding-left:32px;padding-right:32px;}
@media (max-width:768px){.wrap{padding-left:20px;padding-right:20px;}}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(5,10,19,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out;
}
.site-header.is-scrolled{background:rgba(5,10,19,.94);border-bottom-color:var(--line);}
.nav-inner{
  max-width:var(--container);margin:0 auto;
  padding:14px 32px;
  display:flex;align-items:center;gap:24px;
}
@media (max-width:768px){.nav-inner{padding:12px 20px;gap:14px;}}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:17px;letter-spacing:-.01em;flex:none;}
.logo:hover{text-decoration:none;color:var(--text);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  display:grid;place-items:center;font-weight:800;font-size:16px;color:#04121F;
  background:linear-gradient(135deg,#2FA8FF,#35E0C4);
  box-shadow:0 6px 18px rgba(47,168,255,.35);
}
.main-menu{display:flex;align-items:center;gap:4px;margin-left:auto;}
.main-menu a{
  padding:8px 12px;border-radius:10px;font-size:14px;color:var(--text-2);
  white-space:nowrap;transition:all .18s ease-out;
}
.main-menu a:hover{color:var(--text);background:rgba(120,190,255,.08);text-decoration:none;transform:translateY(-1px);}
.main-menu a.is-active{color:var(--text);background:rgba(47,168,255,.14);box-shadow:inset 0 0 0 1px rgba(47,168,255,.35);}
.btn-glow{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:var(--r-btn);
  font-size:14px;font-weight:600;color:#04121F;
  background:linear-gradient(135deg,#2FA8FF,#35E0C4);
  box-shadow:0 0 0 1px rgba(47,168,255,.55),0 10px 30px rgba(47,168,255,.32);
  transition:transform .18s ease-out,box-shadow .18s ease-out,filter .18s ease-out;
  white-space:nowrap;
}
.btn-glow:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(53,224,196,.7),0 14px 34px rgba(47,168,255,.42);}
.btn-glow:active{transform:translateY(1px);}
.nav-cta{margin-left:8px;}
.hamburger{
  display:none;width:40px;height:40px;border-radius:10px;margin-left:auto;
  border:1px solid var(--line);background:rgba(120,190,255,.06);
  color:var(--text);place-items:center;font-size:16px;
}
.hamburger:hover{background:rgba(120,190,255,.14);}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);
  background:rgba(6,12,22,.98);
  padding:12px 20px 20px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;padding:12px 14px;border-radius:10px;color:var(--text-2);font-size:15px;
}
.mobile-drawer a:hover{background:rgba(120,190,255,.08);color:var(--text);text-decoration:none;}
.mobile-drawer a.is-active{color:var(--text);background:rgba(47,168,255,.14);box-shadow:inset 0 0 0 1px rgba(47,168,255,.32);}
@media (max-width:1023px){
  .main-menu,.nav-cta{display:none;}
  .hamburger{display:grid;}
}

/* ===== Article hero ===== */
.art-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.art-hero-bg{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;opacity:.30;
}
.art-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,19,.72) 0%,rgba(5,10,19,.90) 62%,var(--bg) 100%);
}
.art-hero-inner{position:relative;z-index:2;padding:34px 0 clamp(38px,5vw,60px);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px;}
.crumb a{color:var(--text-3);}
.crumb a:hover{color:var(--primary);text-decoration:none;}
.crumb-sep{color:rgba(120,190,255,.35);}
.crumb-cur{color:var(--primary);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;font-size:12.5px;letter-spacing:.02em;
  color:var(--accent);background:rgba(53,224,196,.10);
  border:1px solid rgba(53,224,196,.30);
}
.art-hero h1{
  margin:18px 0 0;max-width:900px;
  font-size:clamp(28px,4.4vw,52px);font-weight:700;line-height:1.25;letter-spacing:-.01em;
}
.meta-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:24px;font-size:13.5px;color:var(--text-3);
}
.meta-bar i{margin-right:6px;color:rgba(120,190,255,.55);}
.meta-time,.meta-time i{color:var(--amber);}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(120,190,255,.30);}

/* ===== Article body ===== */
.art-main{padding:clamp(40px,6vw,72px) 0 clamp(48px,7vw,88px);}
.art-grid{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:56px;align-items:start;}
@media (max-width:1023px){.art-grid{grid-template-columns:minmax(0,1fr);gap:0;}}
.cms-content{max-width:760px;min-width:0;}
.cms-content > *:first-child{margin-top:0;}
.cms-content p{margin:0 0 20px;color:#D8E5F3;}
.cms-content h2{
  margin:40px 0 16px;font-size:clamp(22px,2.6vw,32px);font-weight:650;
  line-height:1.25;letter-spacing:-.01em;color:var(--text);
  scroll-margin-top:104px;
}
.cms-content h3{margin:28px 0 12px;font-size:18px;font-weight:600;line-height:1.4;scroll-margin-top:104px;}
.cms-content h4{margin:22px 0 10px;font-size:16.5px;font-weight:600;color:var(--text);}
.cms-content ul,.cms-content ol{margin:0 0 20px;padding-left:22px;color:#D8E5F3;}
.cms-content li{margin:6px 0;}
.cms-content li::marker{color:var(--primary);}
.cms-content a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;}
.cms-content a:hover{color:#6BF0D9;}
.cms-content blockquote{
  margin:26px 0;padding:16px 20px;
  background:var(--glass);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-left:3px solid var(--primary);border-radius:0 12px 12px 0;
  color:var(--text-2);
}
.cms-content blockquote p:last-child{margin-bottom:0;}
.cms-content img{border-radius:var(--r-img);margin:26px auto;box-shadow:var(--shadow-card);}
.cms-content figure{margin:26px 0;}
.cms-content figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;}
.cms-content hr{border:none;border-top:1px solid var(--line);margin:36px 0;}
.cms-content code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;
  background:rgba(120,190,255,.10);padding:2px 6px;border-radius:6px;color:#BFE4FF;
}
.cms-content pre{
  background:var(--panel-2);border:1px solid var(--line);border-radius:var(--r-img);
  padding:16px 18px;overflow-x:auto;margin:0 0 22px;font-size:14px;line-height:1.7;
}
.cms-content pre code{background:none;padding:0;color:#CFE6FA;}
.cms-content table{
  width:100%;display:block;overflow-x:auto;border-collapse:collapse;
  font-size:14px;margin:0 0 24px;border:1px solid var(--line);border-radius:var(--r-img);
}
.cms-content th,.cms-content td{padding:11px 15px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap;}
.cms-content th{background:rgba(47,168,255,.10);color:var(--text);font-weight:600;}
.cms-content tbody tr:nth-child(odd){background:rgba(120,190,255,.05);}
.cms-content tbody tr:last-child td{border-bottom:none;}

/* TOC */
.toc{position:sticky;top:96px;align-self:start;}
.toc-title{
  font-size:12.5px;letter-spacing:.12em;color:var(--text-3);
  text-transform:uppercase;margin-bottom:12px;
}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:60vh;overflow:auto;}
.toc-list a{
  display:block;padding:7px 0 7px 13px;font-size:13.5px;line-height:1.5;
  color:var(--text-3);border-left:2px solid var(--line);
  transition:all .18s ease-out;
}
.toc-list a:hover{color:var(--text);border-left-color:var(--line-strong);text-decoration:none;}
.toc-list a.is-current{color:var(--text);border-left-color:var(--accent);background:rgba(53,224,196,.06);}
@media (max-width:1023px){.toc{display:none;}}

/* Empty state */
.empty-state{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:clamp(32px,5vw,56px);text-align:center;box-shadow:var(--shadow-card);
}
.empty-state i{font-size:30px;color:var(--amber);}
.empty-state h2{margin:16px 0 8px;font-size:22px;font-weight:650;}
.empty-state p{margin:0 0 22px;color:var(--text-2);font-size:15px;}

/* Footer of article */
.art-foot{
  max-width:760px;margin-top:52px;padding-top:26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
}
.tags{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 13px;border-radius:999px;font-size:13px;
  color:var(--text-2);background:var(--panel-2);border:1px solid var(--line);
  transition:all .18s ease-out;
}
.tag:hover{color:var(--text);border-color:var(--line-strong);text-decoration:none;transform:translateY(-2px);}
.back-link{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:8px;}
.back-link:hover{color:var(--primary);text-decoration:none;}

/* ===== Sections ===== */
.section{padding:clamp(56px,8vw,96px) 0;}
.section-head{max-width:660px;margin-bottom:34px;}
.section-head h2{margin:0 0 12px;font-size:clamp(22px,2.6vw,32px);font-weight:650;line-height:1.25;letter-spacing:-.01em;}
.section-head p{margin:0;color:var(--text-2);font-size:15.5px;line-height:1.8;}

.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:900px){.rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:620px){.rel-grid{grid-template-columns:minmax(0,1fr);}}
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);transition:transform .18s ease-out,border-color .18s ease-out;
}
.rel-card:hover{transform:translateY(-2px);border-color:var(--line-strong);text-decoration:none;}
.rel-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,#0C1726,#123049);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out;}
.rel-card:hover .rel-thumb img{transform:scale(1.04);}
.rel-body{padding:18px 20px 22px;}
.rel-body h3{margin:0 0 8px;font-size:16.5px;font-weight:600;color:var(--text);line-height:1.45;}
.rel-body p{margin:0;font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13.5px;color:var(--primary);}

/* CTA glass */
.cta-card{
  position:relative;overflow:hidden;
  background:var(--glass);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(120,190,255,.22);border-radius:var(--r-card);
  box-shadow:0 8px 24px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.06);
  padding:clamp(28px,4.5vw,48px);
  display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(24px,4vw,48px);align-items:center;
}
@media (max-width:900px){.cta-card{grid-template-columns:minmax(0,1fr);}}
.cta-card h2{margin:0 0 14px;font-size:clamp(22px,2.6vw,30px);font-weight:650;line-height:1.3;}
.cta-card p{margin:0 0 22px;color:var(--text-2);font-size:15px;line-height:1.85;}
.sub-form{display:flex;gap:12px;flex-wrap:wrap;}
.sub-form input{
  flex:1 1 220px;min-width:0;
  padding:12px 15px;border-radius:var(--r-btn);
  background:rgba(6,12,22,.75);border:1px solid var(--line);color:var(--text);
  font-size:14.5px;transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.sub-form input::placeholder{color:var(--text-3);}
.sub-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,168,255,.18);}
.sub-form input.is-error{border-color:var(--amber);box-shadow:0 0 0 3px rgba(255,182,70,.15);}
.form-msg{margin-top:12px;font-size:13px;color:var(--amber);min-height:20px;}
.form-msg.is-ok{color:var(--accent);}
.cta-visual{
  border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/10;background:linear-gradient(135deg,#0C1726,#14344F);
}
.cta-visual img{width:100%;height:100%;object-fit:cover;}
.cta-points{list-style:none;padding:0;margin:0 0 22px;}
.cta-points li{position:relative;padding-left:24px;margin:8px 0;color:var(--text-2);font-size:14.5px;}
.cta-points li::before{
  content:"";position:absolute;left:4px;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 10px rgba(53,224,196,.7);
}

/* ===== Footer ===== */
.site-footer{border-top:1px solid var(--line);background:#060C16;padding:56px 0 0;margin-top:0;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
@media (max-width:900px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}}
@media (max-width:560px){.foot-grid{grid-template-columns:minmax(0,1fr);}}
.foot-brand p{margin:16px 0 0;font-size:14px;color:var(--text-3);line-height:1.85;max-width:340px;}
.foot-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.foot-col a{font-size:14px;color:var(--text-2);}
.foot-col a:hover{color:var(--primary);}
.foot-acc{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  padding:0 0 12px;font-size:14px;font-weight:600;color:var(--text);text-align:left;
}
.foot-acc i{font-size:11px;color:var(--text-3);transition:transform .2s ease-out;}
.foot-acc[aria-expanded="true"] i{transform:rotate(180deg);}
.dim{font-size:13.5px;color:var(--text-3);}
.foot-bottom{
  margin-top:44px;padding:18px 0 26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
@media (max-width:768px){
  .foot-acc{padding-bottom:10px;}
  .foot-body{display:none;padding-bottom:8px;}
  .foot-acc[aria-expanded="true"] + .foot-body{display:block;}
}

/* ===== Mobile tab bar ===== */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:80;
  height:60px;padding-bottom:env(safe-area-inset-bottom);
  background:rgba(6,12,22,.96);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  grid-template-columns:repeat(4,1fr);
}
.tabbar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11px;color:var(--text-3);position:relative;
}
.tabbar a:hover{text-decoration:none;color:var(--text-2);}
.tabbar a i{font-size:18px;}
.tabbar a.is-active{color:var(--primary);}
.tabbar a.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:28px;height:2px;border-radius:2px;background:var(--primary);
  box-shadow:0 0 12px rgba(47,168,255,.85);
}
@media (max-width:1023px){
  .tabbar{display:grid;}
  body{padding-bottom:72px;}
}

/* fade in */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease-out,transform .6s ease-out;}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
    --bg:#050A13; --panel:#08111F; --panel-2:#0C1726;
    --line:rgba(120,190,255,0.14); --line-strong:rgba(47,168,255,0.45);
    --primary:#2FA8FF; --accent:#35E0C4; --amber:#FFB646;
    --text:#E9F2FB; --muted:#9FB3C8; --dim:#6C8098;
    --radius-card:16px; --radius-btn:10px; --radius-img:12px;
    --shadow-card:0 8px 24px rgba(0,0,0,.35);
    --shadow-glow:0 0 0 1px rgba(47,168,255,.55), 0 10px 30px rgba(47,168,255,.32);
    --ease:180ms ease-out;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;background:var(--bg);color:var(--text);
    font-family:'HarmonyOS Sans SC','PingFang SC','Microsoft YaHei','Inter',system-ui,sans-serif;
    font-size:16px;line-height:1.9;
    -webkit-font-smoothing:antialiased;overflow-x:hidden;
  }
  img{max-width:100%;display:block;border-radius:var(--radius-img)}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit;color:inherit}
  ul{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-0.01em}
  p{margin:0}
  a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}
  ::selection{background:rgba(53,224,196,.28)}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:#050A13}
  ::-webkit-scrollbar-thumb{background:rgba(47,168,255,.28);border-radius:8px;border:2px solid #050A13}
  ::-webkit-scrollbar-thumb:hover{background:rgba(47,168,255,.5)}

  .wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
  @media (max-width:768px){ .wrap{padding:0 20px} }
  @media (max-width:767px){ body{padding-bottom:78px} }

  .section{padding-block:clamp(48px,7vw,96px)}
  .section-tight{padding-block:clamp(36px,5vw,64px)}

  /* 顶部导航 */
  .site-header{position:sticky;top:0;z-index:70;background:transparent;border-bottom:1px solid transparent;transition:background var(--ease),border-color var(--ease),backdrop-filter var(--ease)}
  .site-header.is-scrolled{
    background:rgba(18,32,52,.55);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.07),0 10px 30px rgba(0,0,0,.35);
  }
  .head-inner{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:20px;height:72px}
  .logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:-0.01em;color:var(--text);transition:opacity var(--ease)}
  .logo:hover{opacity:.88}
  .logo-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-weight:800;font-size:16px;color:#04131F;background:linear-gradient(135deg,#2FA8FF,#35E0C4);box-shadow:0 6px 18px rgba(47,168,255,.35)}
  .main-menu{display:flex;justify-content:center;gap:4px;flex-wrap:wrap}
  .main-menu a{padding:9px 14px;border-radius:var(--radius-btn);color:var(--muted);font-size:15px;white-space:nowrap;border:1px solid transparent;transition:color var(--ease),background var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease)}
  .main-menu a:hover{color:var(--text);background:rgba(47,168,255,.10);border-color:var(--line);transform:translateY(-2px)}
  .main-menu a:active{transform:translateY(1px)}
  .main-menu a.is-active{color:#FFFFFF;background:rgba(47,168,255,.16);border-color:rgba(47,168,255,.35);box-shadow:inset 0 1px 0 rgba(255,255,255,.12)}
  .head-actions{display:flex;align-items:center;gap:12px}

  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform var(--ease),background var(--ease),box-shadow var(--ease),border-color var(--ease),filter var(--ease)}
  .btn:active{transform:translateY(1px)}
  .btn-primary{background:linear-gradient(135deg,#2FA8FF,#1E86D8);color:#04131F;box-shadow:var(--shadow-glow)}
  .btn-primary:hover{transform:translateY(-2px);filter:brightness(1.07)}
  .btn-amber{background:linear-gradient(135deg,#FFB646,#FF9A1F);color:#241400;box-shadow:0 0 0 1px rgba(255,182,70,.5),0 10px 30px rgba(255,182,70,.24)}
  .btn-amber:hover{transform:translateY(-2px);filter:brightness(1.05)}
  .btn-ghost{background:rgba(12,23,38,.65);border-color:var(--line);color:var(--text)}
  .btn-ghost:hover{border-color:var(--line-strong);transform:translateY(-2px);background:rgba(12,23,38,.9)}
  .btn-sm{padding:9px 16px;font-size:14px}

  .burger{display:none;width:42px;height:42px;border-radius:var(--radius-btn);border:1px solid var(--line);background:var(--panel);place-items:center;cursor:pointer;transition:border-color var(--ease),background var(--ease)}
  .burger:hover{border-color:var(--line-strong);background:var(--panel-2)}
  .mobile-panel{display:none;border-top:1px solid var(--line);background:rgba(8,17,31,.98)}
  .mobile-panel.is-open{display:block;animation:fadeUp .28s ease-out both}
  .mobile-panel nav{display:flex;flex-direction:column;padding:10px 20px 20px}
  .mobile-panel a{padding:13px 4px;color:var(--muted);border-bottom:1px dashed rgba(120,190,255,.12);transition:color var(--ease),padding-left var(--ease)}
  .mobile-panel a:hover{color:var(--text);padding-left:8px}
  .mobile-panel a.is-active{color:var(--primary)}
  @media (max-width:1023px){
    .main-menu{display:none}
    .head-actions .btn{display:none}
    .burger{display:grid}
    .head-inner{grid-template-columns:auto auto;justify-content:space-between}
  }

  /* 移动端底部 Tab */
  .tabbar{position:fixed;left:0;right:0;bottom:0;z-index:80;display:none;grid-template-columns:repeat(4,1fr);height:60px;padding-bottom:env(safe-area-inset-bottom);background:rgba(8,17,31,.94);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-top:1px solid var(--line)}
  @media (max-width:767px){ .tabbar{display:grid} }
  .tab-item{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:11px;color:var(--dim);transition:color var(--ease)}
  .tab-item i{font-size:20px}
  .tab-item:hover{color:var(--muted)}
  .tab-item.is-active{color:var(--primary)}
  .tab-item.is-active::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:34px;height:2px;border-radius:2px;background:var(--primary);box-shadow:0 0 10px var(--primary)}

  /* 面包屑 */
  .breadcrumb-wrap{padding-top:26px}
  .breadcrumb{font-size:13px;color:var(--dim);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
  .breadcrumb a{color:var(--dim);transition:color var(--ease)}
  .breadcrumb a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
  .breadcrumb .sep{color:rgba(108,128,152,.6)}
  .breadcrumb .cur{color:var(--primary)}

  /* 窄幅 Hero */
  .page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);isolation:isolate;margin-top:18px}
  .page-hero-bg{position:absolute;inset:0;z-index:-2;background-size:cover;background-position:center;opacity:.3}
  .page-hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(110deg,rgba(5,10,19,.97) 6%,rgba(5,10,19,.78) 52%,rgba(8,17,31,.58))}
  .page-hero-inner{padding-block:clamp(38px,5vw,58px);max-width:860px}
  .page-hero h1{font-size:clamp(28px,4vw,46px);font-weight:700;margin:14px 0 12px}
  .page-hero p{color:var(--muted);font-size:16px;max-width:720px}
  .pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:.02em;color:var(--accent);background:rgba(53,224,196,.10);border:1px solid rgba(53,224,196,.28)}
  .pill-amber{color:var(--amber);background:rgba(255,182,70,.10);border-color:rgba(255,182,70,.3)}

  /* 板块标题 */
  .sec-head{max-width:760px;margin-bottom:clamp(24px,3vw,40px)}
  .sec-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:650;margin-bottom:12px}
  .sec-head p{color:var(--muted);font-size:15px}
  .eyebrow{display:inline-block;font-size:12px;letter-spacing:.16em;color:var(--accent);margin-bottom:12px}

  /* 编号横条 */
  .strip{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .strip-item{padding:28px 30px;border-right:1px solid var(--line);transition:background var(--ease)}
  .strip-item:last-child{border-right:none}
  .strip-item:hover{background:rgba(12,23,38,.7)}
  .strip-num{font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--amber)}
  .strip-item h3{font-size:18px;font-weight:600;margin:10px 0 8px}
  .strip-item p{color:var(--muted);font-size:15px}
  @media (max-width:860px){
    .strip{grid-template-columns:1fr}
    .strip-item{border-right:none;border-bottom:1px solid var(--line);padding:22px 20px}
    .strip-item:last-child{border-bottom:none}
  }

  /* 左右分栏图文清单 */
  .split{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(290px,.85fr);gap:32px;align-items:start}
  @media (max-width:1024px){ .split{grid-template-columns:1fr} }
  .entry-item{display:grid;grid-template-columns:210px minmax(0,1fr);gap:22px;padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease)}
  .entry-item + .entry-item{margin-top:20px}
  .entry-item:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:0 14px 34px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.07)}
  .entry-item img{width:100%;aspect-ratio:16/10;object-fit:cover}
  .entry-item h3{font-size:18px;font-weight:600;margin-bottom:8px}
  .entry-item p{color:var(--muted);font-size:15px}
  .mini-facts{display:flex;flex-wrap:wrap;gap:8px 18px;margin:14px 0 14px;font-size:13px;color:var(--dim)}
  .mini-facts span{display:inline-flex;align-items:center;gap:7px}
  .mini-facts i{color:var(--accent);font-size:12px}
  .link-more{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--accent);text-decoration:underline;text-underline-offset:3px;transition:gap var(--ease),color var(--ease)}
  .link-more:hover{gap:11px;color:#5CEEDA}
  @media (max-width:640px){
    .entry-item{grid-template-columns:1fr;padding:16px;gap:16px}
  }

  /* 右侧速查卡（实心面板） */
  .info-card{position:sticky;top:96px;background:linear-gradient(180deg,#0C1726,#08111F);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06)}
  .info-card h3{font-size:17px;font-weight:600;margin-bottom:6px}
  .info-card .stamp{font-size:13px;color:var(--amber);display:inline-flex;align-items:center;gap:7px;margin-bottom:18px}
  .fact-list li{display:flex;gap:12px;padding:13px 0;border-bottom:1px dashed rgba(120,190,255,.12)}
  .fact-list li:last-child{border-bottom:none}
  .fact-list i{color:var(--primary);font-size:14px;margin-top:6px}
  .fact-list strong{display:block;font-size:14px;font-weight:600;color:var(--text)}
  .fact-list em{font-style:normal;font-size:13px;color:var(--muted);line-height:1.75}
  .info-card .btn{width:100%;margin-top:18px}
  @media (max-width:1024px){ .info-card{position:static} }

  /* 适配表 */
  .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--panel);box-shadow:var(--shadow-card)}
  table.compat{width:100%;min-width:620px;border-collapse:collapse;font-size:15px}
  .compat th{text-align:left;padding:14px 22px;font-size:13px;letter-spacing:.06em;font-weight:600;color:var(--muted);background:rgba(12,23,38,.92);border-bottom:1px solid var(--line)}
  .compat td{padding:15px 22px;border-bottom:1px solid rgba(120,190,255,.08);color:var(--text)}
  .compat tbody tr:nth-child(even){background:rgba(12,23,38,.5)}
  .compat tbody tr:last-child td{border-bottom:none}
  .compat tbody tr{transition:background var(--ease)}
  .compat tbody tr:hover{background:rgba(47,168,255,.07)}
  .tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600}
  .tag-ok{color:#7FF3DF;background:rgba(53,224,196,.12);border:1px solid rgba(53,224,196,.3)}
  .tag-warn{color:#FFD493;background:rgba(255,182,70,.12);border:1px solid rgba(255,182,70,.32)}
  .tag-blue{color:#9CD4FF;background:rgba(47,168,255,.12);border:1px solid rgba(47,168,255,.3)}

  /* 场景列表 */
  .scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
  .scene{display:flex;gap:16px;padding:22px;background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius-card);transition:transform var(--ease),border-color var(--ease)}
  .scene:hover{transform:translateY(-2px);border-color:var(--line-strong)}
  .scene-ico{flex:0 0 44px;height:44px;border-radius:12px;display:grid;place-items:center;color:var(--accent);background:rgba(53,224,196,.1);border:1px solid rgba(53,224,196,.24)}
  .scene h3{font-size:16px;font-weight:600;margin-bottom:6px}
  .scene p{color:var(--muted);font-size:14.5px}
  @media (max-width:760px){ .scene-grid{grid-template-columns:1fr} }

  /* FAQ */
  .faq-item{background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color var(--ease),background var(--ease)}
  .faq-item + .faq-item{margin-top:14px}
  .faq-item:hover{border-color:rgba(47,168,255,.3)}
  .faq-item[open]{border-left:3px solid var(--primary);background:#0A1424}
  .faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:16px}
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary i{color:var(--primary);transition:transform var(--ease);font-size:14px}
  .faq-item[open] summary i{transform:rotate(180deg)}
  .faq-body{padding:0 22px 20px;color:var(--muted);font-size:15px}

  /* CTA 玻璃卡 */
  .cta-card{position:relative;display:grid;grid-template-columns:1.25fr .85fr;gap:32px;align-items:center;padding:clamp(26px,4vw,48px);border-radius:20px;background:rgba(18,32,52,.55);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border:1px solid var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 20px 50px rgba(0,0,0,.45)}
  .cta-card h2{font-size:clamp(22px,2.6vw,30px);font-weight:650;margin-bottom:12px}
  .cta-card p{color:var(--muted);font-size:15px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
  @media (max-width:900px){ .cta-card{grid-template-columns:1fr} }
  .sub-form{display:flex;gap:10px;flex-wrap:wrap}
  .sub-form input{flex:1;min-width:200px;padding:12px 16px;border-radius:var(--radius-btn);background:rgba(5,10,19,.78);border:1px solid var(--line);color:var(--text);transition:border-color var(--ease),box-shadow var(--ease)}
  .sub-form input::placeholder{color:var(--dim)}
  .sub-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,168,255,.18)}
  .sub-form input.is-error{border-color:var(--amber);box-shadow:0 0 0 3px rgba(255,182,70,.16)}
  .form-msg{min-height:20px;margin-top:10px;font-size:13px;color:var(--muted)}
  .form-msg.error{color:var(--amber)}
  .form-msg.ok{color:var(--accent)}
  .sub-note{font-size:13px;color:var(--dim);margin-top:8px}

  /* 页脚 */
  .site-footer{margin-top:clamp(48px,7vw,96px);border-top:1px solid var(--line);background:linear-gradient(180deg,#08111F,#050A13);padding:56px 0 28px}
  .foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
  @media (max-width:900px){ .foot-grid{grid-template-columns:1fr 1fr} }
  @media (max-width:560px){ .foot-grid{grid-template-columns:1fr;gap:8px} }
  .foot-brand p{color:var(--muted);font-size:14px;line-height:1.85;margin-top:14px;max-width:340px}
  .foot-acc{display:flex;width:100%;align-items:center;justify-content:space-between;gap:10px;padding:0;background:none;border:none;color:var(--text);font-size:15px;font-weight:600;cursor:default;text-align:left}
  .foot-acc i{display:none;color:var(--primary);font-size:12px;transition:transform var(--ease)}
  .foot-acc[aria-expanded="true"] i{transform:rotate(180deg)}
  .foot-body ul{margin-top:16px}
  .foot-body li{margin-bottom:11px}
  .foot-body a{color:var(--muted);font-size:14px;transition:color var(--ease)}
  .foot-body a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
  .dim{color:var(--dim);font-size:13px}
  @media (max-width:900px){
    .foot-acc{cursor:pointer;padding:14px 0;border-bottom:1px solid var(--line)}
    .foot-acc i{display:block}
    .foot-body{display:none}
    .foot-body ul{margin-top:12px}
  }
  @media (min-width:901px){ .foot-body{display:block !important} }
  .foot-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-top:42px;padding-top:20px;border-top:1px solid var(--line);color:var(--dim);font-size:13px}

  /* 动效 */
  .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease-out,transform .6s ease-out}
  .reveal.is-in{opacity:1;transform:none}
  @keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: category2 */
:root{
  --bg:#050A13;
  --panel:#08111F;
  --panel-2:#0C1726;
  --glass:rgba(18,32,52,.55);
  --line:rgba(120,190,255,.14);
  --line-strong:rgba(120,190,255,.30);
  --primary:#2FA8FF;
  --accent:#35E0C4;
  --amber:#FFB646;
  --text:#E9F2FB;
  --muted:#9FB3C8;
  --dim:#6C8098;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow:0 8px 24px rgba(0,0,0,.35);
  --glow:0 0 0 1px rgba(47,168,255,.55), 0 10px 30px rgba(47,168,255,.32);
  --wrap:1240px;
  --sec:clamp(56px,8vw,112px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(47,168,255,.32)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#050A13}
::-webkit-scrollbar-thumb{background:rgba(120,190,255,.20);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:rgba(120,190,255,.34)}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
@media(min-width:768px){.wrap{padding:0 32px}}
.section{padding:var(--sec) 0}
.section-head{max-width:760px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--accent);letter-spacing:.06em;
  border:1px solid rgba(53,224,196,.28);
  background:rgba(53,224,196,.07);
  padding:5px 14px;border-radius:999px;
}
.h2{font-size:clamp(22px,2.6vw,32px);font-weight:650;margin-top:18px}
.h3{font-size:18px;font-weight:600}
.lead{color:var(--muted);margin-top:14px;font-size:15.5px}
.dimtxt{color:var(--dim);font-size:13.5px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(5,10,19,.72);
  border-bottom:1px solid transparent;
  transition:background .2s ease,border-color .2s ease,backdrop-filter .2s ease;
}
.site-header.scrolled{
  background:rgba(8,17,31,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:-.01em}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--primary),#1a63a8);
  color:#04101d;font-weight:800;font-size:16px;
  box-shadow:0 6px 18px rgba(47,168,255,.32);
}
.main-menu{display:none;align-items:center;gap:6px}
.main-menu a{
  padding:8px 12px;border-radius:9px;font-size:14.5px;color:var(--muted);
  transition:color .18s ease,background .18s ease,transform .18s ease;
}
.main-menu a:hover{color:var(--text);background:rgba(120,190,255,.09);transform:translateY(-2px)}
.main-menu a.is-active{color:var(--text);background:rgba(47,168,255,.14);box-shadow:inset 0 0 0 1px rgba(47,168,255,.30)}
.header-cta{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;border-radius:var(--r-btn);
  padding:11px 20px;font-size:14.5px;font-weight:600;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease,saturate .18s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--primary),#1f7fd0);color:#04101d;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,168,255,.75),0 14px 34px rgba(47,168,255,.42)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:rgba(120,190,255,.08);color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--line-strong);background:rgba(120,190,255,.14);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:9px 15px;font-size:13.5px}
.hamburger{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:rgba(120,190,255,.07);color:var(--text);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
}
.hamburger:hover{border-color:var(--line-strong)}
.drawer{display:none;border-top:1px solid var(--line);background:rgba(8,17,31,.96);backdrop-filter:blur(14px)}
.drawer.open{display:block}
.drawer a{display:block;padding:13px 20px;font-size:15px;color:var(--muted);border-bottom:1px solid rgba(120,190,255,.08)}
.drawer a.is-active{color:var(--primary)}
@media(min-width:1024px){
  .main-menu{display:flex}
  .hamburger{display:none}
  .drawer{display:none !important}
}

/* ---------- hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.page-hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.34;transform:scale(1.02);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,19,.72) 0%,rgba(5,10,19,.90) 62%,var(--bg) 100%);
}
.page-hero-inner{position:relative;z-index:2;padding:56px 20px 52px;max-width:900px;margin:0 auto}
@media(min-width:768px){.page-hero-inner{padding:64px 32px 60px}}
.page-hero h1{font-size:clamp(28px,4.4vw,44px);font-weight:700;margin-top:16px}
.hero-sub{color:var(--muted);margin-top:14px;font-size:15.5px;max-width:660px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip{
  font-size:13px;color:var(--muted);border:1px solid var(--line);
  background:rgba(8,17,31,.66);padding:5px 13px;border-radius:999px;
}
.chip i{color:var(--accent);margin-right:6px}

/* ---------- breadcrumb ---------- */
.crumb{padding:18px 0 0;font-size:13.5px;color:var(--dim)}
.crumb a{color:var(--dim);transition:color .18s ease}
.crumb a:hover{color:var(--accent)}
.crumb .sep{margin:0 8px;color:rgba(108,128,152,.7)}
.crumb .cur{color:var(--primary)}

/* ---------- timeline ---------- */
.timeline-panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:clamp(24px,4vw,44px);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.04);
}
.timeline{position:relative;padding-left:62px}
.timeline::before{
  content:"";position:absolute;left:20px;top:10px;bottom:10px;width:2px;
  background:linear-gradient(180deg,var(--accent),rgba(53,224,196,.10));
}
.step{position:relative;padding-bottom:30px}
.step:last-child{padding-bottom:0}
.step-num{
  position:absolute;left:-62px;top:0;width:42px;height:42px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--panel-2);border:1px solid rgba(53,224,196,.42);
  color:var(--accent);font-weight:700;font-size:14px;letter-spacing:.02em;
  box-shadow:0 6px 18px rgba(0,0,0,.4);
}
.step h3{font-size:18px;font-weight:600}
.step p{color:var(--muted);font-size:15px;margin-top:8px}
.step-tag{
  display:inline-block;margin-top:10px;font-size:12.5px;color:var(--amber);
  border:1px solid rgba(255,182,70,.32);background:rgba(255,182,70,.08);
  padding:2px 10px;border-radius:999px;
}
@media(max-width:520px){
  .timeline{padding-left:50px}
  .step-num{left:-50px;width:34px;height:34px;font-size:12.5px}
  .timeline::before{left:16px}
}

/* ---------- info grid ---------- */
.split{display:grid;gap:26px}
@media(min-width:1024px){.split{grid-template-columns:7fr 5fr;align-items:start}}
.info-grid{display:grid;gap:18px;margin-top:26px}
@media(min-width:640px){.info-grid{grid-template-columns:repeat(2,1fr)}}
.info-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.04);
  transition:transform .18s ease,border-color .18s ease;
}
.info-card:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.info-card h3{font-size:16.5px;font-weight:600;display:flex;align-items:center;gap:10px}
.info-card h3 i{color:var(--primary);font-size:15px}
.info-card p{color:var(--muted);font-size:14.5px;margin-top:8px}
.figure-card{
  background:var(--panel-2);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow);
}
.figure-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);margin:0}
.figure-card .fig-body{padding:20px 22px 24px}
.figure-card .fig-body h3{font-size:17px;font-weight:600}
.figure-card .fig-body p{color:var(--muted);font-size:14.5px;margin-top:8px}
.figure-card .fig-body .fig-line{
  margin-top:16px;border-left:3px solid var(--primary);padding-left:14px;
  color:var(--text);font-size:14.5px;
}

/* ---------- alert list ---------- */
.alert-list{display:grid;gap:14px;margin-top:28px}
.alert-item{
  display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;
  background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--amber);
  border-radius:14px;padding:18px 22px;
  transition:transform .18s ease,border-color .18s ease;
}
.alert-item:hover{transform:translateY(-2px);border-color:var(--line-strong);border-left-color:var(--amber)}
.alert-item .ico{color:var(--amber);font-size:16px;line-height:1.9}
.alert-item h3{font-size:16px;font-weight:600}
.alert-item p{color:var(--muted);font-size:14.5px;margin-top:6px}

/* ---------- safety / quote ---------- */
.safety{
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:var(--r-card);
  padding:clamp(24px,4vw,40px);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.05);
}
.safety ul{margin-top:20px;display:grid;gap:14px}
.safety li{display:flex;gap:12px;align-items:flex-start;color:var(--muted);font-size:15px}
.safety li i{color:var(--accent);margin-top:7px;font-size:14px}
.quote{
  margin-top:24px;border-left:3px solid var(--primary);padding:14px 0 14px 18px;
  color:var(--text);font-size:15.5px;background:linear-gradient(90deg,rgba(47,168,255,.07),transparent);
}

/* ---------- qa ---------- */
.qa-grid{display:grid;gap:18px;margin-top:28px}
@media(min-width:768px){.qa-grid{grid-template-columns:repeat(2,1fr)}}
.qa-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.04);
  transition:transform .18s ease,border-color .18s ease;
}
.qa-item:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.qa-item h3{font-size:16px;font-weight:600;color:var(--text)}
.qa-item p{color:var(--muted);font-size:14.5px;margin-top:10px}

/* ---------- cta ---------- */
.cta-card{
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:20px;
  padding:clamp(28px,5vw,52px);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.06);
}
.cta-grid{display:grid;gap:30px}
@media(min-width:1024px){.cta-grid{grid-template-columns:1.05fr .95fr;align-items:center}}
.sub-form{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.sub-form input{
  flex:1 1 240px;min-width:0;background:rgba(5,10,19,.75);border:1px solid var(--line);
  border-radius:var(--r-btn);padding:12px 16px;font-size:14.5px;color:var(--text);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.sub-form input::placeholder{color:var(--dim)}
.sub-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,168,255,.18)}
.sub-form input.error{border-color:var(--amber);box-shadow:0 0 0 3px rgba(255,182,70,.16)}
.form-msg{font-size:13px;margin-top:10px;color:var(--dim)}
.form-msg.err{color:var(--amber)}
.form-msg.ok{color:var(--accent)}

/* ---------- related ---------- */
.rel-grid{display:grid;gap:20px;margin-top:28px}
@media(min-width:640px){.rel-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.rel-grid{grid-template-columns:repeat(3,1fr)}}
.rel-card{
  display:block;background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.rel-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 14px 34px rgba(0,0,0,.45)}
.rel-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img)}
.rel-card .rel-body{padding:18px 20px 22px}
.rel-card h3{font-size:16.5px;font-weight:600}
.rel-card p{color:var(--muted);font-size:14px;margin-top:8px}
.rel-card .more{color:var(--accent);font-size:13.5px;margin-top:12px;display:inline-flex;align-items:center;gap:6px}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--panel);margin-top:clamp(40px,6vw,80px)}
.foot-grid{display:grid;gap:26px;padding:clamp(36px,5vw,56px) 0 24px}
@media(min-width:768px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
.foot-brand p{color:var(--muted);font-size:14px;margin-top:16px;max-width:340px}
.foot-col ul{display:grid;gap:10px}
.foot-col ul a{color:var(--muted);font-size:14px;transition:color .18s ease}
.foot-col ul a:hover{color:var(--accent)}
.foot-col .dim{color:var(--dim);font-size:13.5px}
.foot-acc{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  background:none;border:none;padding:0 0 12px;cursor:default;
  color:var(--text);font-size:14.5px;font-weight:600;
}
.foot-acc i{display:none;color:var(--dim)}
.foot-body{display:block}
@media(max-width:767px){
  .foot-grid{padding-bottom:20px}
  .foot-col{border-bottom:1px solid rgba(120,190,255,.10);padding-bottom:8px}
  .foot-acc{cursor:pointer;padding:4px 0 12px}
  .foot-acc i{display:inline;transition:transform .2s ease}
  .foot-acc[aria-expanded="false"] i{transform:rotate(-90deg)}
  .foot-acc[aria-expanded="false"] + .foot-body{display:none}
}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  border-top:1px solid var(--line);padding:18px 0 26px;
  color:var(--dim);font-size:13px;
}

/* ---------- bottom tab ---------- */
.bottom-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:80;display:grid;
  grid-template-columns:repeat(4,1fr);height:60px;
  background:rgba(8,17,31,.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);
}
.bottom-tab a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--dim);font-size:11px;line-height:1.3;transition:color .18s ease;
}
.bottom-tab a i{font-size:22px}
.bottom-tab a.is-active{color:var(--primary)}
.bottom-tab a.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:34px;height:2px;border-radius:2px;background:var(--primary);box-shadow:0 0 12px var(--primary);
}
@media(min-width:768px){.bottom-tab{display:none}}
@media(max-width:767px){
  main{padding-bottom:84px}
  .site-footer{margin-bottom:60px}
}

/* ---------- anim ---------- */
.fade-up{opacity:0;transform:translateY(12px);animation:fadeUp .7s ease-out forwards}
.fade-up.d1{animation-delay:.08s}
.fade-up.d2{animation-delay:.16s}
@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}
@media(prefers-reduced-motion:reduce){
  .fade-up{opacity:1;transform:none;animation:none}
  *{transition:none !important}
}

/* roulang page: category3 */
:root{
    --bg:#050A13;
    --panel:#08111F;
    --panel-2:#0C1726;
    --line:rgba(120,190,255,.14);
    --line-strong:rgba(120,190,255,.30);
    --brand:#2FA8FF;
    --mint:#35E0C4;
    --amber:#FFB646;
    --text:#E9F2FB;
    --muted:#9FB3C8;
    --dim:#6C8098;
    --r-lg:16px;
    --r-md:12px;
    --r-sm:10px;
    --shadow:0 8px 24px rgba(0,0,0,.35);
    --glow:0 0 0 1px rgba(47,168,255,.55), 0 10px 30px rgba(47,168,255,.32);
    --ease:180ms ease-out;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:'HarmonyOS Sans SC','PingFang SC','Microsoft YaHei','Inter',system-ui,sans-serif;
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
    padding-bottom:84px;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block}
  a{color:var(--mint);text-decoration:none;text-underline-offset:3px}
  a:hover{text-decoration:underline}
  button,input{font:inherit;color:inherit}
  ul{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-0.01em;font-weight:650}
  p{margin:0}
  :focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}

  .wrap{max-width:1240px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){ .wrap{padding:0 32px} }

  /* ---------- header ---------- */
  .site-header{
    position:fixed;top:0;left:0;right:0;z-index:80;
    background:linear-gradient(180deg,rgba(5,10,19,.92),rgba(5,10,19,0));
    transition:background var(--ease),backdrop-filter var(--ease),border-color var(--ease);
    border-bottom:1px solid transparent;
  }
  .site-header.is-scrolled{
    background:rgba(18,32,52,.55);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  }
  .header-inner{display:flex;align-items:center;gap:20px;min-height:68px}
  .logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:16px;letter-spacing:-0.01em;text-decoration:none}
  .logo:hover{text-decoration:none}
  .logo-mark{
    width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
    background:linear-gradient(140deg,#2FA8FF,#35E0C4);
    color:#04121F;font-weight:800;font-size:16px;
    box-shadow:0 6px 16px rgba(47,168,255,.30);
  }
  .main-menu{display:none;align-items:center;gap:6px;margin-left:auto}
  .main-menu a{
    color:var(--muted);font-size:14px;font-weight:500;padding:9px 13px;border-radius:10px;
    transition:color var(--ease),background var(--ease),transform var(--ease);
  }
  .main-menu a:hover{color:var(--text);background:rgba(47,168,255,.08);text-decoration:none;transform:translateY(-1px)}
  .main-menu a.is-active{color:#E9F2FB;background:rgba(47,168,255,.13);box-shadow:inset 0 0 0 1px rgba(47,168,255,.34)}
  .header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
  .main-menu + .header-actions{margin-left:14px}
  @media (min-width:1024px){
    .main-menu{display:flex}
    .burger{display:none}
  }

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--r-sm);padding:11px 20px;font-size:15px;font-weight:600;
    border:1px solid transparent;cursor:pointer;text-decoration:none;
    transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  }
  .btn:hover{transform:translateY(-2px);text-decoration:none}
  .btn:active{transform:translateY(1px)}
  .btn-primary{background:var(--brand);color:#04121F;box-shadow:var(--glow)}
  .btn-primary:hover{background:#4FB6FF}
  .btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text)}
  .btn-ghost:hover{border-color:var(--line-strong);background:rgba(47,168,255,.08)}
  .btn-amber{background:var(--amber);color:#231402}
  .btn-amber:hover{background:#FFC463;box-shadow:0 10px 26px rgba(255,182,70,.28)}
  .btn-sm{padding:8px 14px;font-size:13.5px}
  .btn-block{width:100%}

  .burger{
    width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
    background:rgba(12,23,38,.7);display:grid;place-items:center;cursor:pointer;color:var(--text);
    transition:border-color var(--ease),background var(--ease);
  }
  .burger:hover{border-color:var(--line-strong);background:rgba(47,168,255,.10)}
  .mobile-panel{
    display:none;border-top:1px solid var(--line);
    background:rgba(8,17,31,.98);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  }
  .mobile-panel.is-open{display:block}
  .mobile-panel ul{padding:10px 20px 18px}
  .mobile-panel a{
    display:block;padding:12px 4px;color:var(--muted);font-size:15px;
    border-bottom:1px solid var(--line);text-decoration:none;
  }
  .mobile-panel a:hover{color:var(--text)}
  .mobile-panel a.is-active{color:var(--brand)}
  @media (min-width:1024px){ .mobile-panel{display:none !important} }

  /* ---------- page hero ---------- */
  .page-hero{
    position:relative;padding:132px 0 56px;
    background-image:linear-gradient(180deg,rgba(5,10,19,.72),rgba(5,10,19,.96)),url('/assets/images/backpic/back-1.webp');
    background-size:cover;background-position:center;
    border-bottom:1px solid var(--line);
  }
  .page-hero::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(53,224,196,.45),transparent);
  }
  @media (min-width:768px){ .page-hero{padding:150px 0 76px} }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;color:var(--mint);letter-spacing:.04em;
    padding:6px 14px;border-radius:999px;
    background:rgba(53,224,196,.10);border:1px solid rgba(53,224,196,.30);
  }
  .page-hero h1{
    margin:18px 0 14px;font-size:clamp(28px,4.4vw,44px);font-weight:700;max-width:16em;
  }
  .page-hero p{color:var(--muted);max-width:44em;font-size:16px}

  /* ---------- breadcrumb ---------- */
  .crumb{padding:20px 0 4px;font-size:13.5px;color:var(--dim)}
  .crumb a{color:var(--dim);text-decoration:none}
  .crumb a:hover{color:var(--muted)}
  .crumb span.sep{margin:0 8px;color:rgba(108,128,152,.7)}
  .crumb .current{color:var(--brand)}

  /* ---------- sections ---------- */
  .section{padding:clamp(40px,5.5vw,72px) 0}
  .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
  .section-head h2{font-size:clamp(22px,2.6vw,32px)}
  .section-head p{color:var(--dim);font-size:14px;max-width:40em}

  .chips{display:flex;flex-wrap:wrap;gap:10px;padding:22px 0 6px}
  .chip{
    font-size:13.5px;color:var(--muted);padding:7px 15px;border-radius:999px;
    border:1px solid var(--line);background:var(--panel);
    transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease);
  }
  .chip:hover{color:var(--text);border-color:var(--line-strong);transform:translateY(-2px);text-decoration:none}
  .chip.is-active{color:var(--brand);border-color:rgba(47,168,255,.45);background:rgba(47,168,255,.10)}

  /* ---------- feed list ---------- */
  .feed{border-top:1px solid var(--line)}
  .feed-row{
    display:grid;grid-template-columns:1fr;gap:16px;
    padding:26px 0;border-bottom:1px solid var(--line);
    transition:background var(--ease),border-color var(--ease);
  }
  @media (min-width:900px){
    .feed-row{grid-template-columns:200px minmax(0,1fr) auto;gap:26px;align-items:center;padding:28px 6px}
    .feed-row:hover{background:rgba(47,168,255,.045);border-bottom-color:var(--line-strong)}
  }
  .feed-thumb{
    aspect-ratio:16/10;border-radius:var(--r-md);overflow:hidden;
    border:1px solid var(--line);background:linear-gradient(140deg,#0C1726,#08111F);
    transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
    max-width:280px;
  }
  .feed-thumb img{width:100%;height:100%;object-fit:cover}
  .feed-row:hover .feed-thumb{border-color:rgba(47,168,255,.45);box-shadow:0 8px 24px rgba(0,0,0,.4)}
  .feed-main{min-width:0}
  .feed-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:8px}
  .badge{
    font-size:12.5px;line-height:1.6;color:var(--mint);
    padding:3px 12px;border-radius:999px;
    background:rgba(53,224,196,.10);border:1px solid rgba(53,224,196,.30);
    white-space:nowrap;
  }
  .badge-amber{color:var(--amber);background:rgba(255,182,70,.10);border-color:rgba(255,182,70,.32)}
  .feed-date{font-size:13px;color:var(--amber);font-variant-numeric:tabular-nums}
  .feed-title{font-size:19px;font-weight:600;margin-bottom:8px}
  .feed-title a{color:var(--text);text-decoration:none;transition:color var(--ease)}
  .feed-title a:hover{color:var(--brand);text-decoration:none}
  .feed-desc{
    color:var(--muted);font-size:14.5px;line-height:1.85;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .feed-more{
    display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--brand);
    white-space:nowrap;text-decoration:none;transition:gap var(--ease),color var(--ease);
  }
  .feed-more:hover{gap:12px;text-decoration:none;color:#5CBBFF}

  .pager{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;margin-top:36px}
  .pager .page-item{
    min-width:42px;height:42px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;
    border-radius:var(--r-sm);border:1px solid var(--line);background:var(--panel);
    color:var(--muted);font-size:14px;
  }
  .pager .page-item.is-current{color:var(--text);background:rgba(47,168,255,.14);border-color:rgba(47,168,255,.48)}
  .pager .page-item.is-disabled{opacity:.45}
  .pager .page-item.is-gap{border-color:transparent;background:transparent}

  /* ---------- cadence strips ---------- */
  .cadence{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--panel)}
  .cadence-grid{display:grid;grid-template-columns:1fr;gap:22px;padding:clamp(32px,4.5vw,56px) 0}
  @media (min-width:820px){ .cadence-grid{grid-template-columns:repeat(3,1fr);gap:28px} }
  .cadence-item{display:flex;gap:16px;align-items:flex-start}
  .cadence-num{
    flex:none;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
    font-size:15px;font-weight:700;color:var(--mint);
    background:rgba(53,224,196,.08);border:1px solid rgba(53,224,196,.28);
  }
  .cadence-item h3{font-size:17px;margin-bottom:6px}
  .cadence-item p{color:var(--muted);font-size:14.5px;line-height:1.85}

  .stat-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;padding:0 0 clamp(32px,4vw,48px)}
  @media (min-width:768px){ .stat-row{grid-template-columns:repeat(3,1fr);gap:24px} }
  .stat{
    background:var(--panel-2);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:18px 20px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.05);
  }
  .stat b{display:block;font-size:26px;font-weight:700;color:var(--text);letter-spacing:-0.01em}
  .stat span{font-size:13.5px;color:var(--dim)}

  /* ---------- faq ---------- */
  .faq-grid{display:grid;grid-template-columns:1fr;gap:14px}
  @media (min-width:900px){ .faq-grid{grid-template-columns:1fr 1fr;gap:18px} }
  details.faq{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:18px 20px;transition:border-color var(--ease),background var(--ease);
  }
  details.faq:hover{border-color:var(--line-strong)}
  details.faq[open]{border-left:3px solid var(--brand);background:var(--panel-2)}
  details.faq summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;
    font-size:16px;font-weight:600;color:var(--text);
  }
  details.faq summary::-webkit-details-marker{display:none}
  details.faq summary i{color:var(--muted);font-size:13px;transition:transform var(--ease),color var(--ease)}
  details.faq[open] summary i{transform:rotate(180deg);color:var(--brand)}
  details.faq p{margin-top:12px;color:var(--muted);font-size:15px;line-height:1.9}

  /* ---------- cta ---------- */
  .cta-card{
    background:rgba(18,32,52,.55);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border:1px solid rgba(120,190,255,.20);border-radius:var(--r-lg);
    box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.07);
    padding:clamp(26px,4vw,44px);
    display:grid;grid-template-columns:1fr;gap:26px;align-items:center;
  }
  @media (min-width:900px){ .cta-card{grid-template-columns:1.15fr .85fr;gap:40px} }
  .cta-card h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px}
  .cta-card p{color:var(--muted);font-size:15px}
  .form-row{display:flex;gap:10px;flex-wrap:wrap}
  .field{
    flex:1 1 220px;min-width:0;background:var(--panel);border:1px solid var(--line);
    border-radius:var(--r-sm);padding:12px 14px;color:var(--text);font-size:15px;
    transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
  }
  .field::placeholder{color:var(--dim)}
  .field:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,168,255,.18)}
  .field.is-error{border-color:var(--amber);box-shadow:0 0 0 3px rgba(255,182,70,.16)}
  .form-note{font-size:13px;color:var(--dim);margin-top:10px}
  .form-note.is-error{color:var(--amber)}
  .form-note.is-ok{color:var(--mint)}

  /* ---------- footer ---------- */
  .site-footer{border-top:1px solid var(--line);background:var(--panel);margin-top:clamp(40px,6vw,80px);padding:clamp(36px,5vw,64px) 0 24px}
  .foot-grid{display:grid;grid-template-columns:1fr;gap:26px}
  @media (min-width:820px){ .foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px} }
  .foot-col{padding-bottom:14px;border-bottom:1px solid var(--line)}
  @media (min-width:820px){ .foot-col{border-bottom:none;padding-bottom:0} }
  .foot-brand p{color:var(--muted);font-size:14px;margin-top:14px;max-width:30em}
  .foot-acc{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:10px;
    background:transparent;border:0;padding:6px 0;color:var(--text);font-size:15px;font-weight:600;cursor:pointer;
  }
  .foot-acc i{color:var(--dim);font-size:13px;transition:transform var(--ease)}
  .foot-body{display:none;margin-top:10px}
  .foot-body ul{display:flex;flex-direction:column;gap:9px}
  .foot-body a{color:var(--muted);font-size:14px;text-decoration:none}
  .foot-body a:hover{color:var(--mint)}
  .foot-body .dim{color:var(--dim);font-size:13.5px}
  @media (min-width:820px){
    .foot-acc{pointer-events:none}
    .foot-acc i{display:none}
    .foot-body{display:block !important}
  }
  .foot-col.is-open .foot-body{display:block}
  .foot-col.is-open .foot-acc i{transform:rotate(180deg)}
  .foot-bottom{
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    margin-top:34px;padding-top:20px;border-top:1px solid var(--line);
    color:var(--dim);font-size:13px;
  }

  /* ---------- mobile tab bar ---------- */
  .tabbar{
    position:fixed;left:0;right:0;bottom:0;z-index:90;
    display:grid;grid-template-columns:repeat(4,1fr);
    height:60px;padding-bottom:env(safe-area-inset-bottom);
    background:rgba(8,17,31,.94);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-top:1px solid var(--line);
  }
  .tabbar a{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    color:var(--dim);font-size:11px;text-decoration:none;position:relative;
    transition:color var(--ease);
  }
  .tabbar a i{font-size:22px}
  .tabbar a:hover{color:var(--muted);text-decoration:none}
  .tabbar a.is-active{color:var(--brand)}
  .tabbar a.is-active::before{
    content:"";position:absolute;top:0;left:26%;right:26%;height:2px;border-radius:2px;
    background:var(--brand);box-shadow:0 0 12px rgba(47,168,255,.8);
  }
  @media (min-width:1024px){ .tabbar{display:none} body{padding-bottom:0} }

  /* ---------- motion ---------- */
  @keyframes riseIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
  .rise{animation:riseIn .6s ease-out both}
  @media (prefers-reduced-motion:reduce){
    .rise{animation:none}
    *{transition:none !important}
  }

/* roulang page: category4 */
:root{
    --bg:#050A13;
    --panel:#08111F;
    --raise:#0C1726;
    --line:rgba(120,190,255,.14);
    --pri:#2FA8FF;
    --acc:#35E0C4;
    --amber:#FFB646;
    --text:#E9F2FB;
    --muted:#9FB3C8;
    --dim:#6C8098;
    --r-card:16px;
    --r-img:12px;
    --r-btn:10px;
    --sh:0 8px 24px rgba(0,0,0,.35);
    --glass:rgba(18,32,52,.55);
    --sec:clamp(56px,8vw,112px);
  }

  *,*::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",Inter,system-ui,sans-serif;
    font-size:16px;
    line-height:1.9;
    letter-spacing:0;
    background-image:
      radial-gradient(900px 520px at 12% -8%, rgba(47,168,255,.14), transparent 62%),
      radial-gradient(720px 460px at 92% 4%, rgba(53,224,196,.10), transparent 60%);
    background-repeat:no-repeat;
  }

  h1,h2,h3,h4{
    margin:0;
    line-height:1.25;
    letter-spacing:-.01em;
    font-weight:650;
  }
  h1{ font-size:clamp(28px,4.4vw,52px); font-weight:700; }
  h2{ font-size:clamp(22px,2.6vw,32px); }
  h3{ font-size:18px; font-weight:600; }
  p{ margin:0; }

  a{ color:inherit; text-decoration:none; transition:color .18s ease-out, border-color .18s ease-out, background-color .18s ease-out, transform .18s ease-out, box-shadow .18s ease-out; }
  a.link{ color:var(--acc); text-decoration:underline; text-underline-offset:3px; }

  img{ max-width:100%; display:block; }
  button,input{ font:inherit; color:inherit; }
  button{ cursor:pointer; }

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

  ::selection{ background:rgba(47,168,255,.32); color:#fff; }

  ::-webkit-scrollbar{ width:10px; height:10px; }
  ::-webkit-scrollbar-track{ background:#070E1A; }
  ::-webkit-scrollbar-thumb{ background:rgba(47,168,255,.34); border-radius:999px; }
  ::-webkit-scrollbar-thumb:hover{ background:rgba(47,168,255,.55); }

  .wrap{
    width:100%;
    max-width:1240px;
    margin:0 auto;
    padding:0 32px;
  }

  .sec{ padding:var(--sec) 0; }
  .sec-tight{ padding:clamp(36px,5vw,64px) 0; }

  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    letter-spacing:.08em;
    color:var(--acc);
    text-transform:uppercase;
  }
  .eyebrow::before{
    content:"";
    width:22px;height:1px;background:var(--acc);opacity:.8;
  }

  .lead{ color:var(--muted); font-size:16px; }
  .dim{ color:var(--dim); font-size:13px; }

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(5,10,19,.72);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid transparent;
    transition:background-color .25s ease-out, border-color .25s ease-out, box-shadow .25s ease-out;
  }
  .site-header.is-scrolled{
    background:rgba(6,12,23,.94);
    border-bottom-color:var(--line);
    box-shadow:0 8px 26px rgba(0,0,0,.45);
  }
  .header-inner{
    display:flex;
    align-items:center;
    gap:24px;
    min-height:72px;
  }

  .logo{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-weight:700;
    font-size:16px;
    letter-spacing:.01em;
    white-space:nowrap;
  }
  .logo-mark{
    width:34px;height:34px;
    display:grid;place-items:center;
    border-radius:10px;
    background:linear-gradient(140deg, rgba(47,168,255,.95), rgba(53,224,196,.85));
    color:#04121F;
    font-weight:800;
    font-size:16px;
    box-shadow:0 0 0 1px rgba(47,168,255,.5), 0 8px 20px rgba(47,168,255,.25);
  }

  .main-menu{
    display:flex;
    align-items:center;
    gap:4px;
    margin-left:auto;
  }
  .main-menu a{
    position:relative;
    display:inline-block;
    padding:9px 13px;
    font-size:14px;
    color:var(--muted);
    border-radius:8px;
    white-space:nowrap;
  }
  .main-menu a:hover{
    color:var(--text);
    background:rgba(47,168,255,.10);
  }
  .main-menu a:active{ transform:translateY(1px); }
  .main-menu a.is-active{
    color:var(--pri);
    background:rgba(47,168,255,.12);
  }
  .main-menu a.is-active::after{
    content:"";
    position:absolute;
    left:13px;right:13px;bottom:3px;
    height:2px;
    border-radius:2px;
    background:linear-gradient(90deg,var(--pri),var(--acc));
    box-shadow:0 0 12px rgba(47,168,255,.75);
  }

  .header-cta{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:10px 18px;
    font-size:14px;
    font-weight:600;
    color:#04121F;
    border-radius:var(--r-btn);
    background:linear-gradient(135deg,#57C2FF,#2FA8FF 55%,#35E0C4);
    box-shadow:0 0 0 1px rgba(47,168,255,.55), 0 10px 30px rgba(47,168,255,.32);
    white-space:nowrap;
  }
  .header-cta:hover{ transform:translateY(-2px); box-shadow:0 0 0 1px rgba(53,224,196,.7), 0 14px 34px rgba(47,168,255,.42); }
  .header-cta:active{ transform:translateY(1px); }

  .hamburger{
    display:none;
    width:42px;height:42px;
    border:1px solid var(--line);
    border-radius:10px;
    background:var(--panel);
    color:var(--text);
    align-items:center;
    justify-content:center;
  }
  .hamburger:hover{ border-color:rgba(47,168,255,.5); color:var(--pri); }

  .mobile-drawer{
    display:none;
    border-top:1px solid var(--line);
    background:rgba(6,12,23,.98);
    padding:12px 0 18px;
  }
  .mobile-drawer.is-open{ display:block; }
  .mobile-drawer a{
    display:block;
    padding:13px 4px;
    color:var(--muted);
    font-size:15px;
    border-bottom:1px solid rgba(120,190,255,.08);
  }
  .mobile-drawer a:last-child{ border-bottom:0; }
  .mobile-drawer a.is-active{ color:var(--pri); }
  .mobile-drawer .m-cta{
    margin-top:14px;
    text-align:center;
    border-radius:var(--r-btn);
    background:linear-gradient(135deg,#57C2FF,#2FA8FF 55%,#35E0C4);
    color:#04121F;
    font-weight:600;
    border-bottom:0;
  }

  /* ---------- Hero ---------- */
  .hero{
    position:relative;
    overflow:hidden;
    min-height:250px;
    display:flex;
    align-items:center;
    border-bottom:1px solid var(--line);
  }
  .hero-bg{
    position:absolute; inset:0;
    background-image:url("/assets/images/coverpic/cover-4.png");
    background-size:cover;
    background-position:center 38%;
    filter:saturate(.85);
  }
  .hero-bg::after{
    content:"";
    position:absolute; inset:0;
    background:
      linear-gradient(100deg, rgba(5,10,19,.96) 8%, rgba(5,10,19,.78) 46%, rgba(5,10,19,.55) 100%),
      radial-gradient(700px 320px at 88% 20%, rgba(53,224,196,.18), transparent 70%);
  }
  .hero .wrap{ position:relative; z-index:2; padding-top:40px; padding-bottom:40px; }
  .hero h1{ max-width:22ch; }
  .hero .lead{ margin-top:14px; max-width:62ch; }
  .hero-tags{ display:flex; flex-wrap:wrap; gap:10px; margin-top:18px; }

  .tag{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:5px 12px;
    font-size:12.5px;
    border-radius:999px;
    color:var(--acc);
    background:rgba(53,224,196,.10);
    border:1px solid rgba(53,224,196,.28);
    white-space:nowrap;
  }
  .tag.amber{ color:var(--amber); background:rgba(255,182,70,.10); border-color:rgba(255,182,70,.30); }
  .tag.blue{ color:var(--pri); background:rgba(47,168,255,.10); border-color:rgba(47,168,255,.30); }

  /* ---------- Breadcrumb ---------- */
  .crumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--dim);
    padding:22px 0 0;
    flex-wrap:wrap;
  }
  .crumb a:hover{ color:var(--pri); }
  .crumb .sep{ color:rgba(108,128,152,.6); }
  .crumb .now{ color:var(--pri); }

  /* ---------- Sections ---------- */
  .sec-head{ max-width:70ch; }
  .sec-head h2{ margin-top:12px; }
  .sec-head .lead{ margin-top:14px; }

  .stats{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:1px;
    margin-top:34px;
    background:var(--line);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
  }
  .stat{
    background:var(--panel);
    padding:22px 20px;
  }
  .stat b{
    display:block;
    font-size:clamp(20px,2.4vw,27px);
    font-weight:700;
    color:var(--text);
    letter-spacing:-.01em;
  }
  .stat span{ display:block; margin-top:4px; font-size:13px; color:var(--dim); }
  .stat.hl b{ color:var(--acc); }

  /* ---------- Safety notes (vertical accent bars) ---------- */
  .notes{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:18px 26px;
    margin-top:34px;
  }
  .note{
    position:relative;
    padding:20px 22px 20px 24px;
    background:linear-gradient(180deg, rgba(12,23,38,.9), rgba(8,17,31,.9));
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh);
  }
  .note::before{
    content:"";
    position:absolute;
    left:0; top:18px; bottom:18px;
    width:3px;
    border-radius:0 3px 3px 0;
    background:linear-gradient(180deg,var(--pri),var(--acc));
  }
  .note:hover{
    transform:translateY(-2px);
    border-color:rgba(47,168,255,.42);
    box-shadow:0 14px 30px rgba(0,0,0,.45);
  }
  .note h3{ display:flex; align-items:center; gap:10px; }
  .note h3 i{ color:var(--pri); font-size:15px; }
  .note p{ margin-top:8px; color:var(--muted); font-size:14.5px; line-height:1.85; }

  /* ---------- FAQ ---------- */
  .faq-wrap{ margin-top:34px; }
  .faq-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
    align-items:start;
  }
  .faq-item{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:14px;
    box-shadow:var(--sh);
    overflow:hidden;
    transition:border-color .18s ease-out, transform .18s ease-out, box-shadow .18s ease-out;
  }
  .faq-item:hover{ border-color:rgba(47,168,255,.38); }
  .faq-item[open]{
    border-left:3px solid var(--pri);
    box-shadow:0 14px 32px rgba(0,0,0,.45);
  }
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    padding:18px 20px;
    display:flex;
    align-items:flex-start;
    gap:14px;
    font-size:16px;
    font-weight:600;
    line-height:1.55;
    color:var(--text);
  }
  .faq-item summary::-webkit-details-marker{ display:none; }
  .faq-item summary .q-ico{
    flex:0 0 auto;
    margin-top:2px;
    width:24px;height:24px;
    display:grid;place-items:center;
    border-radius:50%;
    border:1px solid rgba(47,168,255,.4);
    color:var(--pri);
    font-size:11px;
    transition:transform .22s ease-out, background-color .18s ease-out, color .18s ease-out;
  }
  .faq-item[open] summary .q-ico{
    transform:rotate(135deg);
    background:rgba(47,168,255,.16);
    color:var(--acc);
    border-color:rgba(53,224,196,.5);
  }
  .faq-item summary:hover{ color:#fff; }
  .faq-body{
    padding:0 20px 20px 58px;
    color:var(--muted);
    font-size:15px;
    line-height:1.9;
  }
  .faq-body .hint{
    display:inline-flex;
    align-items:center;
    gap:6px;
    margin-top:10px;
    font-size:13px;
    color:var(--amber);
  }

  /* ---------- Subscribe CTA (glass) ---------- */
  .cta-card{
    position:relative;
    border-radius:20px;
    padding:clamp(28px,4vw,48px);
    background:var(--glass);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border:1px solid rgba(120,190,255,.22);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.08), 0 18px 44px rgba(0,0,0,.45);
    overflow:hidden;
  }
  .cta-card::after{
    content:"";
    position:absolute;
    right:-90px; top:-90px;
    width:280px;height:280px;
    border-radius:50%;
    background:radial-gradient(circle, rgba(47,168,255,.35), transparent 65%);
    pointer-events:none;
  }
  .cta-inner{
    position:relative;
    z-index:2;
    display:grid;
    grid-template-columns:1.15fr .85fr;
    gap:32px;
    align-items:center;
  }
  .cta-inner h2{ margin-top:12px; }
  .cta-inner p{ margin-top:12px; color:var(--muted); max-width:52ch; }

  .form-row{ display:flex; gap:12px; margin-top:18px; flex-wrap:wrap; }
  .field{
    flex:1 1 240px;
    min-width:0;
    background:rgba(6,13,24,.85);
    border:1px solid var(--line);
    border-radius:var(--r-btn);
    padding:13px 15px;
    color:var(--text);
    font-size:15px;
    outline:none;
    transition:border-color .18s ease-out, box-shadow .18s ease-out;
  }
  .field::placeholder{ color:#5E7386; }
  .field:hover{ border-color:rgba(120,190,255,.32); }
  .field:focus{
    border-color:var(--pri);
    box-shadow:0 0 0 3px rgba(47,168,255,.20);
  }
  .field.is-error{
    border-color:var(--amber);
    box-shadow:0 0 0 3px rgba(255,182,70,.16);
  }
  .btn-primary{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:13px 24px;
    font-size:15px;
    font-weight:600;
    color:#04121F;
    border:0;
    border-radius:var(--r-btn);
    background:linear-gradient(135deg,#57C2FF,#2FA8FF 55%,#35E0C4);
    box-shadow:0 0 0 1px rgba(47,168,255,.55), 0 10px 30px rgba(47,168,255,.32);
    transition:transform .18s ease-out, box-shadow .18s ease-out, filter .18s ease-out;
  }
  .btn-primary:hover{ transform:translateY(-2px); box-shadow:0 0 0 1px rgba(53,224,196,.7), 0 16px 34px rgba(47,168,255,.42); }
  .btn-primary:active{ transform:translateY(1px); }
  .btn-primary:disabled{ filter:saturate(.4); cursor:not-allowed; transform:none; }

  .btn-ghost{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 22px;
    font-size:15px;
    font-weight:600;
    color:var(--text);
    border:1px solid rgba(120,190,255,.26);
    border-radius:var(--r-btn);
    background:rgba(12,23,38,.7);
  }
  .btn-ghost:hover{ border-color:rgba(47,168,255,.6); color:var(--pri); transform:translateY(-2px); }
  .btn-ghost:active{ transform:translateY(1px); }

  .form-msg{ margin-top:12px; font-size:13px; min-height:20px; }
  .form-msg.err{ color:var(--amber); }
  .form-msg.ok{ color:var(--acc); }

  /* ---------- Contact card ---------- */
  .contact-grid{
    display:grid;
    grid-template-columns:1.1fr .9fr;
    gap:24px;
    margin-top:30px;
  }
  .panel{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:26px;
    box-shadow:var(--sh);
  }
  .panel h3{ margin-bottom:12px; }
  .panel p{ color:var(--muted); font-size:14.5px; }
  .kv-list{ list-style:none; margin:16px 0 0; padding:0; }
  .kv-list li{
    display:flex;
    align-items:flex-start;
    gap:12px;
    padding:12px 0;
    border-bottom:1px dashed rgba(120,190,255,.12);
    font-size:14.5px;
    color:var(--muted);
  }
  .kv-list li:last-child{ border-bottom:0; }
  .kv-list i{ color:var(--acc); margin-top:6px; font-size:13px; }
  .kv-list b{ color:var(--text); font-weight:600; }

  .quote{
    border-left:3px solid var(--pri);
    padding:6px 0 6px 16px;
    color:var(--muted);
    font-size:14.5px;
    margin-top:18px;
    line-height:1.85;
  }

  .cover-img{
    width:100%;
    aspect-ratio:16/10;
    object-fit:cover;
    border-radius:var(--r-img);
    filter:saturate(.92) brightness(.92);
    border:1px solid var(--line);
  }

  /* ---------- Footer ---------- */
  .site-footer{
    margin-top:var(--sec);
    border-top:1px solid var(--line);
    background:linear-gradient(180deg, rgba(8,17,31,.65), rgba(5,10,19,.98));
    padding:clamp(40px,5vw,64px) 0 26px;
  }
  .foot-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:32px;
  }
  .foot-brand p{ margin-top:14px; color:var(--muted); font-size:14px; max-width:38ch; }
  .foot-col ul{ list-style:none; margin:0; padding:0; }
  .foot-col ul li{ margin-bottom:11px; }
  .foot-col ul a{ color:var(--muted); font-size:14px; }
  .foot-col ul a:hover{ color:var(--pri); }
  .foot-acc{
    display:block;
    width:100%;
    text-align:left;
    background:none;
    border:0;
    padding:0 0 12px;
    color:var(--text);
    font-size:14px;
    font-weight:600;
    pointer-events:none;
  }
  .foot-acc i{ display:none; }
  .foot-bottom{
    margin-top:36px;
    padding-top:20px;
    border-top:1px solid rgba(120,190,255,.10);
    display:flex;
    justify-content:space-between;
    gap:14px;
    flex-wrap:wrap;
    color:var(--dim);
    font-size:13px;
  }

  /* ---------- Mobile tab bar ---------- */
  .tabbar{
    display:none;
    position:fixed;
    left:0; right:0; bottom:0;
    z-index:70;
    height:60px;
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(6,12,23,.96);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-top:1px solid var(--line);
  }
  .tabbar-inner{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    height:60px;
  }
  .tab{
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    font-size:11px;
    color:var(--dim);
    position:relative;
  }
  .tab i{ font-size:19px; }
  .tab.is-active{ color:var(--pri); }
  .tab.is-active::before{
    content:"";
    position:absolute;
    top:0; left:22%; right:22%;
    height:2px;
    border-radius:2px;
    background:linear-gradient(90deg,var(--pri),var(--acc));
    box-shadow:0 0 12px rgba(47,168,255,.8);
  }
  .tab:active{ transform:translateY(1px); }

  /* ---------- Animation ---------- */
  .fade-up{
    opacity:0;
    transform:translateY(14px);
    animation:fadeUp .7s ease-out forwards;
  }
  .d1{ animation-delay:.06s; }
  .d2{ animation-delay:.14s; }
  .d3{ animation-delay:.22s; }
  @keyframes fadeUp{ to{ opacity:1; transform:translateY(0);} }

  @media (prefers-reduced-motion: reduce){
    *{ animation:none !important; transition:none !important; }
    .fade-up{ opacity:1; transform:none; }
  }

  /* ---------- Responsive ---------- */
  @media (max-width:1024px){
    .main-menu{ display:none; }
    .hamburger{ display:inline-flex; margin-left:auto; }
    .header-cta{ display:none; }
    .foot-grid{ grid-template-columns:1fr 1fr; gap:26px; }
    .cta-inner{ grid-template-columns:1fr; }
    .contact-grid{ grid-template-columns:1fr; }
    .stats{ grid-template-columns:repeat(2,1fr); }
  }

  @media (max-width:768px){
    .wrap{ padding:0 20px; }
    body{ font-size:15.5px; }
    .site-footer{ padding-bottom:96px; }
    .tabbar{ display:block; }
    .foot-grid{ grid-template-columns:1fr; gap:0; }
    .foot-acc{ pointer-events:auto; padding:16px 0; border-bottom:1px solid rgba(120,190,255,.10); display:flex; align-items:center; justify-content:space-between; }
    .foot-acc i{ display:inline; transition:transform .22s ease-out; font-size:12px; color:var(--dim); }
    .foot-acc[aria-expanded="true"] i{ transform:rotate(180deg); }
    .foot-body{ display:none; padding:14px 0 6px; }
    .foot-col.is-open .foot-body{ display:block; }
    .foot-brand p{ max-width:100%; }
    .faq-grid{ grid-template-columns:1fr; }
    .faq-body{ padding-left:20px; }
    .hero{ min-height:220px; }
    .hero .wrap{ padding-top:32px; padding-bottom:32px; }
    main{ padding-bottom:8px; }
  }

  @media (max-width:520px){
    .notes{ grid-template-columns:1fr; }
    .stats{ grid-template-columns:1fr 1fr; }
    .stat{ padding:18px 16px; }
    .form-row{ flex-direction:column; }
    .field{ flex:1 1 auto; width:100%; }
    .btn-primary{ width:100%; }
    .foot-bottom{ flex-direction:column; gap:6px; }
  }