/* roulang page: index */
:root{
  --bg:#070B14;
  --bg-2:#0B1322;
  --bg-3:#05080F;
  --card:rgba(18,28,48,.72);
  --border:rgba(90,140,200,.18);
  --line:rgba(90,140,200,.14);
  --cyan:#35E1FF;
  --cyan-hover:#6BECFF;
  --cyan-active:#1FB8D6;
  --amber:#FFB020;
  --magenta:#FF4D8D;
  --success:#3DE8A0;
  --warning:#FFC53D;
  --danger:#FF5C6C;
  --title:#F2F7FF;
  --text:#C7D3E6;
  --muted:#8A9BB4;
  --placeholder:#6F819A;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-card:0 8px 24px rgba(0,0,0,.45);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Saira","Rajdhani","HarmonyOS Sans SC",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(56,225,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,225,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--title);font-weight:700;line-height:1.3}
p{margin:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}
@media (max-width:767px){.container{padding:0 16px}}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(7,11,20,.82);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--cyan),transparent 45%,var(--amber));
  opacity:.5;pointer-events:none;
}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:28px;height:28px;display:grid;place-items:center;border-radius:8px;
  background:linear-gradient(135deg,var(--cyan),rgba(31,184,214,.35));
  color:#04121A;font-size:13px;
  box-shadow:0 0 16px rgba(53,225,255,.45);
  clip-path:polygon(0 0,calc(100% - 7px) 0,100% 7px,100% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-main{font-size:16px;font-weight:700;color:var(--title);letter-spacing:.02em}
.brand-sub{font-size:11px;color:var(--cyan);letter-spacing:.18em}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:10px}
.nav-link{
  position:relative;padding:10px 12px;font-size:15px;color:var(--muted);border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--title);background:rgba(53,225,255,.06)}
.nav-link.active{color:var(--cyan);text-shadow:0 0 12px rgba(53,225,255,.55)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(53,225,255,.8);
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--border);
  color:var(--title);align-items:center;justify-content:center;font-size:16px;
}
.nav-toggle:hover{border-color:rgba(53,225,255,.45);color:var(--cyan)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1.2;padding:11px 20px;
  border-radius:var(--radius-btn);border:1px solid transparent;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn i{font-size:13px}
.btn-primary{
  background:var(--cyan);color:#04121A;
  box-shadow:0 0 0 1px rgba(53,225,255,.5),0 0 24px rgba(53,225,255,.32);
}
.btn-primary:hover{
  background:var(--cyan-hover);transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(53,225,255,.62),0 0 34px rgba(53,225,255,.46);
}
.btn-primary:active{
  background:var(--cyan-active);transform:translateY(1px);
  box-shadow:0 0 0 1px rgba(53,225,255,.45),0 0 14px rgba(53,225,255,.3);
}
.btn-ghost{border-color:rgba(53,225,255,.45);color:var(--cyan);background:transparent}
.btn-ghost:hover{background:rgba(53,225,255,.12);transform:translateY(-2px);border-color:rgba(53,225,255,.7)}
.btn-ghost:active{transform:translateY(1px);background:rgba(53,225,255,.18)}
.btn-amber{
  background:var(--amber);color:#1A1204;
  box-shadow:0 0 0 1px rgba(255,176,32,.5),0 0 24px rgba(255,176,32,.28);
}
.btn-amber:hover{
  background:#FFC24D;transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(255,176,32,.62),0 0 34px rgba(255,176,32,.42);
}
.btn-amber:active{transform:translateY(1px);background:#E89A12}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-pill{border-radius:999px}
.btn.is-disabled,.btn[disabled]{opacity:.4;box-shadow:none;cursor:not-allowed;transform:none}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--cyan);transition:color .18s ease}
.text-link i{font-size:11px;transition:transform .18s ease}
.text-link:hover{color:var(--cyan-hover)}
.text-link:hover i{transform:translateX(3px)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:radial-gradient(120% 110% at 82% 0%,rgba(53,225,255,.10),transparent 55%),
             radial-gradient(90% 90% at 0% 100%,rgba(255,176,32,.07),transparent 60%),
             var(--bg);
  border-bottom:1px solid var(--line);
}
.hero-media{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.26}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(7,11,20,.96) 0%,rgba(7,11,20,.78) 48%,rgba(11,19,34,.86) 100%)}
.hero-inner{
  position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;
  padding-top:72px;padding-bottom:48px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;margin-bottom:20px;
  border:1px solid rgba(53,225,255,.35);border-radius:6px;background:rgba(53,225,255,.08);
  font-size:12px;letter-spacing:.08em;color:var(--cyan);
}
.hero h1{font-size:clamp(30px,4.4vw,52px);line-height:1.25;letter-spacing:-.01em;margin-bottom:20px}
.hero-sub{font-size:17px;line-height:1.8;color:var(--muted);max-width:560px;margin-bottom:28px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{display:flex;flex-wrap:wrap;margin-top:38px}
.hero-stats li{display:flex;flex-direction:column;padding-right:26px;margin-right:26px;border-right:1px solid var(--line)}
.hero-stats li:last-child{padding-right:0;margin-right:0;border-right:0}
.stat-num{font-family:var(--font-num);font-size:30px;font-weight:700;line-height:1.2;color:var(--cyan);letter-spacing:.02em}
.stat-label{font-size:13px;color:var(--muted);letter-spacing:.04em}
.hero-visual{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--border);box-shadow:var(--shadow-card);background:#0E1729;
}
.hero-visual img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,20,0) 42%,rgba(7,11,20,.72) 100%)}
.energy-bar{
  position:relative;height:6px;border-radius:999px;margin:34px 0 44px;
  background:rgba(90,140,200,.16);overflow:hidden;
}
.energy-bar span{
  position:absolute;top:0;left:0;height:100%;width:34%;border-radius:999px;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  animation:energyMove 3.4s ease-in-out infinite;
}
@keyframes energyMove{
  0%{transform:translateX(-100%);opacity:.7}
  50%{opacity:1}
  100%{transform:translateX(300%);opacity:.7}
}

/* ---------- 板块通用 ---------- */
.section{position:relative;padding:88px 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.35}
.section-sub{font-size:15px;color:var(--muted);margin-top:10px;max-width:660px}
[id]{scroll-margin-top:92px}

/* ---------- 玩法步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step-card{
  position:relative;overflow:hidden;padding:26px 22px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.step-card::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,rgba(53,225,255,.75),transparent)}
.step-card::after{content:"";position:absolute;top:0;left:0;width:0;height:0;border-top:10px solid rgba(53,225,255,.4);border-right:10px solid transparent}
.step-card:hover{border-color:rgba(53,225,255,.4);transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.55)}
.step-num{display:block;font-family:var(--font-num);font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--cyan);margin-bottom:14px}
.step-icon{font-size:22px;color:var(--cyan);margin-bottom:14px}
.step-card h3{font-size:18px;margin-bottom:10px}
.step-card p{font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- 奖励预览 ---------- */
.rewards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.reward-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.reward-card:hover{border-color:rgba(53,225,255,.4);transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.55)}
.reward-media{position:relative;aspect-ratio:16/9;background:#0E1729;border-bottom:1px solid var(--line)}
.reward-media img{width:100%;height:100%;object-fit:cover}
.reward-badge{
  position:absolute;top:10px;right:10px;font-size:12px;line-height:1.6;
  padding:3px 9px;border-radius:6px;
  background:rgba(255,77,141,.14);border:1px solid rgba(255,77,141,.45);color:var(--magenta);
}
.reward-badge.is-amber{background:rgba(255,176,32,.14);border-color:rgba(255,176,32,.45);color:var(--amber)}
.reward-badge.is-cyan{background:rgba(53,225,255,.12);border-color:rgba(53,225,255,.45);color:var(--cyan)}
.reward-badge.is-muted{background:rgba(138,155,180,.1);border-color:rgba(138,155,180,.35);color:var(--muted)}
.reward-body{padding:18px}
.reward-body h3{font-size:17px;margin-bottom:14px}
.progress{height:8px;border-radius:999px;background:rgba(90,140,200,.16);overflow:hidden}
.progress span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--amber),#FFD166)}
.progress-cyan span{background:linear-gradient(90deg,var(--cyan),#8FF0FF)}
.progress-meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px;font-size:12px;color:var(--muted)}
.num{font-family:var(--font-num);letter-spacing:.02em}

/* ---------- 任务进度 ---------- */
.track{margin-bottom:44px}
.track-rail{position:relative;height:8px;border-radius:999px;background:rgba(90,140,200,.16);overflow:hidden}
.track-rail span{display:block;width:62%;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--cyan),var(--amber))}
.track-nodes{display:grid;grid-template-columns:repeat(3,1fr);margin-top:18px;gap:16px}
.track-node{display:flex;flex-direction:column;gap:4px}
.track-node:nth-child(2){align-items:center;text-align:center}
.track-node:nth-child(3){align-items:flex-end;text-align:right}
.track-title{font-size:15px;font-weight:500;color:var(--title)}
.track-value{font-family:var(--font-num);font-size:20px;color:var(--cyan)}
.track-node.is-done .track-value{color:var(--success)}
.track-node.is-lock .track-value{color:var(--muted)}
.track-desc{font-size:13px;color:var(--muted)}
.status-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.status-card{
  padding:22px;background:var(--card);border:1px solid var(--border);
  border-left:3px solid var(--muted);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:border-color .18s ease,transform .18s ease;
}
.status-card:hover{transform:translateY(-3px)}
.status-card.is-done{border-left-color:var(--success)}
.status-card.is-doing{border-left-color:var(--cyan)}
.status-card.is-lock{border-left-color:rgba(138,155,180,.5)}
.status-card h3{font-size:17px;margin:12px 0 10px}
.status-card p{font-size:14px;line-height:1.75;color:var(--muted)}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;font-size:13px;font-weight:500;line-height:1.7;
  padding:3px 10px;border-radius:6px;border:1px solid;
}
.badge-cyan{color:var(--cyan);border-color:rgba(53,225,255,.45);background:rgba(53,225,255,.12)}
.badge-amber{color:var(--amber);border-color:rgba(255,176,32,.45);background:rgba(255,176,32,.12)}
.badge-magenta{color:var(--magenta);border-color:rgba(255,77,141,.45);background:rgba(255,77,141,.12)}
.badge-success{color:var(--success);border-color:rgba(61,232,160,.45);background:rgba(61,232,160,.12)}
.badge-muted{color:var(--muted);border-color:rgba(138,155,180,.35);background:rgba(138,155,180,.1)}

/* ---------- 参与按钮区 ---------- */
.cta-narrow{max-width:640px;margin:0 auto;text-align:center}
.cta-narrow h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px}
.cta-narrow p{font-size:15px;color:var(--muted);margin-bottom:28px}
.cta-hint{font-size:13px;color:var(--placeholder);margin-top:14px}
.cta-links{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;margin-top:24px}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:start}
.news-feature{
  display:block;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.news-feature:hover{border-color:rgba(53,225,255,.4);transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.55)}
.news-feature-media{aspect-ratio:16/9;background:#0E1729;border-bottom:1px solid var(--line)}
.news-feature-media img{width:100%;height:100%;object-fit:cover}
.news-feature-body{padding:22px}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.news-time{font-family:var(--font-num);letter-spacing:.02em}
.news-feature-body h3{
  font-size:20px;line-height:1.5;margin:12px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-feature-body p{
  font-size:14px;line-height:1.75;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-list{display:flex;flex-direction:column;gap:14px}
.news-row{
  display:flex;align-items:center;gap:14px;padding:12px;
  background:var(--card);border:1px solid var(--border);border-radius:12px;
  transition:border-color .18s ease,transform .18s ease;
}
.news-row:hover{border-color:rgba(53,225,255,.4);transform:translateY(-2px)}
.news-thumb{
  flex:0 0 auto;width:88px;height:60px;border-radius:8px;overflow:hidden;
  background:#0E1729;border:1px solid var(--line);
}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-row-body{display:flex;flex-direction:column;min-width:0}
.news-row-title{
  font-size:14px;line-height:1.55;color:var(--title);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-row-meta{display:flex;align-items:center;gap:8px;margin-top:6px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.empty-state{
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:32px;text-align:center;color:var(--muted);
  border:1px dashed rgba(90,140,200,.35);border-radius:var(--radius-card);background:rgba(11,19,34,.5);
}
.empty-state i{font-size:40px;color:rgba(90,140,200,.55)}
.loading-skeleton{
  background:linear-gradient(90deg,rgba(90,140,200,.10) 25%,rgba(90,140,200,.2) 37%,rgba(90,140,200,.10) 63%);
  background-size:400% 100%;animation:shimmer 1.4s ease infinite;
}
@keyframes shimmer{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px;font-size:16px;color:var(--title);text-align:left;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--cyan)}
.faq-q i{color:var(--cyan);font-size:13px;flex:0 0 auto;transition:transform .22s ease}
.faq-item.open .faq-q i{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-item.open .faq-a{max-height:340px}
.faq-a-inner{
  background:#0E1729;border-left:2px solid var(--cyan);border-radius:0 8px 8px 0;
  padding:16px 20px;margin:0 0 18px;font-size:15px;line-height:1.8;color:var(--text);
}

/* ---------- 页尾 CTA ---------- */
.footer-cta{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,rgba(53,225,255,.08),transparent 52%),
             linear-gradient(300deg,rgba(255,176,32,.07),transparent 55%),
             var(--bg-2);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.footer-cta::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--cyan),var(--amber),transparent);
  opacity:.55;
}
.footer-cta .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px;text-align:center}
.footer-cta h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px}
.footer-cta p{font-size:15px;color:var(--muted);margin-bottom:26px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-3);border-top:1px solid var(--line);padding-top:56px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:40px}
.footer-brand .brand{margin-bottom:4px}
.footer-brand p{font-size:13px;line-height:1.85;color:var(--muted);margin-top:14px;max-width:300px}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--title);font-weight:500}
.footer-col a{display:block;font-size:14px;color:var(--muted);padding:6px 0;transition:color .18s ease,transform .18s ease}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px)}
.footer-col li{font-size:14px;color:var(--muted);padding:6px 0}
.footer-bottom{
  border-top:1px solid var(--line);padding:18px 0;
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--placeholder);
}
.footer-bottom a{color:var(--placeholder)}
.footer-bottom a:hover{color:var(--cyan)}

/* ---------- 移动端底部 CTA ---------- */
.mobile-cta-bar{display:none}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .header-inner{gap:14px}
  .nav-link{padding:10px 9px;font-size:14px}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .hero-inner{grid-template-columns:1fr;gap:34px;padding-top:52px;padding-bottom:36px}
  .hero-visual{order:2}
  .hero-visual img{aspect-ratio:16/9}
  .steps{grid-template-columns:repeat(2,1fr)}
  .rewards{grid-template-columns:repeat(2,1fr)}
  .status-cards{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .main-nav{
    position:fixed;top:68px;left:0;right:0;bottom:0;z-index:99;
    flex-direction:column;align-items:stretch;gap:0;margin-left:0;padding:16px;
    background:rgba(7,11,20,.98);
    -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
    transform:translateX(-100%);transition:transform .26s ease;overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0)}
  .nav-link{display:flex;align-items:center;height:56px;font-size:17px;padding:0 4px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-link.active::after{display:none}
  .nav-toggle{display:flex}
  .track-nodes{grid-template-columns:1fr;gap:14px}
  .track-node,.track-node:nth-child(2),.track-node:nth-child(3){align-items:flex-start;text-align:left}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .hero h1{font-size:clamp(26px,7.2vw,34px)}
  .hero-sub{font-size:15px}
  .hero-stats li{padding-right:18px;margin-right:18px}
  .stat-num{font-size:24px}
  .header-cta{display:none}
  .steps{grid-template-columns:1fr}
  .rewards{grid-template-columns:1fr}
  .rewards .reward-card{margin-top:0!important}
  .news-thumb{width:72px;height:54px}
  .btn{width:100%}
  .hero-cta .btn,.cta-narrow .btn{width:100%}
  .cta-links{gap:16px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding-top:44px}
  body{padding-bottom:60px}
  .mobile-cta-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:90;height:60px;
    align-items:center;gap:12px;padding:0 16px;
    background:rgba(7,11,20,.94);
    -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
    border-top:1px solid var(--line);
  }
  .mobile-cta-bar .btn{width:100%;height:42px;padding:0 16px}
}
@media (max-width:479px){
  .hero-inner{padding-top:40px}
  .hero-stats{margin-top:28px}
  .hero-stats li{padding-right:14px;margin-right:14px}
  .section-head{margin-bottom:28px}
}
@media (min-width:1024px){
  .rewards .reward-card:nth-child(3n+2){margin-top:24px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg:#070B14;
  --bg-2:#0B1322;
  --bg-3:#0E1729;
  --card:rgba(18,28,48,.72);
  --line:rgba(90,140,200,.18);
  --line-soft:rgba(90,140,200,.14);
  --line-strong:rgba(53,225,255,.40);
  --cyan:#35E1FF;
  --cyan-h:#6BECFF;
  --cyan-a:#1FB8D6;
  --amber:#FFB020;
  --magenta:#FF4D8D;
  --ok:#3DE8A0;
  --warn:#FFC53D;
  --err:#FF5C6C;
  --t1:#F2F7FF;
  --t2:#C7D3E6;
  --t3:#8A9BB4;
  --t4:#6F819A;
  --r-card:14px;
  --r-btn:10px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --glow:0 0 0 1px rgba(53,225,255,.5),0 0 24px rgba(53,225,255,.32);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Saira","Rajdhani",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--t2);
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(56,225,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,225,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;color:var(--t1);font-weight:700;letter-spacing:.2px;}
p{margin:0;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:rgba(53,225,255,.28);color:#fff;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px;}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,20,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,rgba(53,225,255,.5),rgba(53,225,255,0) 45%,rgba(255,176,32,.5));
}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:28px;height:28px;display:grid;place-items:center;border-radius:8px;
  background:linear-gradient(135deg,rgba(53,225,255,.22),rgba(255,176,32,.18));
  border:1px solid rgba(53,225,255,.4);
  color:var(--cyan);font-size:13px;
  box-shadow:0 0 16px rgba(53,225,255,.24);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-main{font-size:16px;font-weight:700;color:var(--t1);letter-spacing:.6px;}
.brand-sub{font-size:10px;letter-spacing:.28em;color:var(--t3);}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;
  font-size:15px;color:var(--t3);border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--t1);background:rgba(53,225,255,.06);}
.nav-link.active{color:var(--cyan);text-shadow:0 0 12px rgba(53,225,255,.35);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(53,225,255,.7);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;cursor:pointer;
  background:rgba(18,28,48,.7);border:1px solid var(--line);color:var(--t2);
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--cyan);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .18s cubic-bezier(.22,.61,.36,1),box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-primary{background:var(--cyan);color:#04121A;box-shadow:var(--glow);}
.btn-primary:hover{background:var(--cyan-h);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(53,225,255,.55),0 0 34px rgba(53,225,255,.42);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(53,225,255,.45),0 0 14px rgba(53,225,255,.25);}
.btn-ghost{background:transparent;border-color:rgba(53,225,255,.55);color:var(--cyan);}
.btn-ghost:hover{background:rgba(53,225,255,.12);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-amber{background:var(--amber);color:#241500;box-shadow:0 0 0 1px rgba(255,176,32,.5),0 0 24px rgba(255,176,32,.3);}
.btn-amber:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,176,32,.6),0 0 34px rgba(255,176,32,.42);}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;box-shadow:none;}
.text-link{color:var(--cyan);font-size:14px;display:inline-flex;align-items:center;gap:6px;}
.text-link i{transition:transform .18s ease;}
.text-link:hover i{transform:translateX(3px);}

/* ---------- reading progress ---------- */
.read-progress{
  position:sticky;top:68px;z-index:55;height:3px;width:100%;
  background:rgba(90,140,200,.16);
}
.read-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan-a),var(--cyan));box-shadow:0 0 12px rgba(53,225,255,.6);}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;padding:44px 0 38px;
  background-image:linear-gradient(180deg,rgba(7,11,20,.72),rgba(7,11,20,.94)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line-soft);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:18px;}
.breadcrumb a{color:var(--t3);transition:color .18s ease;}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb .sep{color:var(--t4);}
.breadcrumb .current{color:var(--cyan);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:6px;font-size:13px;font-weight:500;line-height:1.6;
  border:1px solid rgba(53,225,255,.45);background:rgba(53,225,255,.12);color:var(--cyan-h);
}
.tag-amber{border-color:rgba(255,176,32,.45);background:rgba(255,176,32,.12);color:var(--amber);}
.tag-magenta{border-color:rgba(255,77,141,.4);background:rgba(255,77,141,.12);color:var(--magenta);}
.tag-muted{border-color:var(--line);background:rgba(90,140,200,.1);color:var(--t3);}
.article-hero h1{
  font-size:clamp(26px,3.6vw,42px);line-height:1.3;max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:18px;font-size:13px;color:var(--t3);
}
.article-meta .dot{color:var(--t4);}
.article-meta .num{font-family:var(--font-num);letter-spacing:.04em;color:var(--t2);}

/* ---------- layout ---------- */
.section{padding:56px 0;}
.article-layout{display:grid;grid-template-columns:minmax(0,800px) 200px;gap:48px;justify-content:center;}
.article-main{min-width:0;}

/* ---------- article body ---------- */
.article-body{font-size:17px;line-height:1.9;color:var(--t2);word-break:break-word;}
.article-body p{margin:0 0 18px;}
.article-body h2{
  font-size:clamp(22px,2.4vw,26px);line-height:1.4;color:var(--t1);
  margin:38px 0 16px;padding-left:12px;border-left:3px solid var(--cyan);
}
.article-body h3{font-size:19px;line-height:1.5;color:var(--cyan-h);margin:28px 0 12px;}
.article-body h4{font-size:17px;color:var(--t1);margin:22px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;}
.article-body ul li{position:relative;margin-bottom:9px;padding-left:2px;}
.article-body ul li::before{
  content:"";position:absolute;left:-16px;top:.78em;width:6px;height:6px;border-radius:2px;background:var(--cyan);
}
.article-body ol{list-style:decimal;}
.article-body ol li{margin-bottom:9px;}
.article-body blockquote{
  margin:22px 0;padding:14px 20px;background:var(--bg-3);
  border-left:3px solid var(--amber);border-radius:0 10px 10px 0;color:var(--t2);
}
.article-body img{
  max-width:100%;height:auto;margin:24px auto;border-radius:12px;
  border:1px solid var(--line);background:var(--bg-2);
}
.article-body a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:var(--cyan-h);}
.article-body strong{color:var(--t1);}
.article-body table{
  display:block;width:100%;max-width:100%;overflow-x:auto;
  border-collapse:collapse;margin:22px 0;font-size:15px;
}
.article-body th,.article-body td{padding:10px 14px;border-bottom:1px solid var(--line-soft);text-align:left;white-space:nowrap;}
.article-body th{background:var(--bg-3);color:var(--t1);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--divider);margin:32px 0;}
.article-body code{
  font-family:var(--font-num);font-size:14px;padding:2px 6px;border-radius:6px;
  background:rgba(53,225,255,.1);color:var(--cyan-h);border:1px solid rgba(53,225,255,.2);
}
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  min-height:240px;padding:40px 24px;text-align:center;
  border:1px dashed var(--line);border-radius:var(--r-card);background:rgba(18,28,48,.4);
}
.empty-state i{font-size:40px;color:var(--t4);}
.empty-state p{color:var(--t3);font-size:15px;}

/* ---------- toc ---------- */
.toc{position:sticky;top:96px;align-self:start;font-size:14px;}
.toc-title{
  font-size:12px;letter-spacing:.08em;color:var(--t4);text-transform:uppercase;
  margin-bottom:12px;display:flex;align-items:center;gap:8px;
}
.toc-title::before{content:"";width:14px;height:2px;border-radius:2px;background:var(--cyan);}
.toc-list{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line-soft);}
.toc-list a{
  display:block;padding:7px 0 7px 14px;color:var(--t3);font-size:14px;line-height:1.5;
  border-left:2px solid transparent;margin-left:-1px;transition:color .18s ease,border-color .18s ease;
}
.toc-list a:hover{color:var(--t1);}
.toc-list a.is-active{color:var(--cyan);border-left-color:var(--cyan);}
.toc-inline{display:none;margin-bottom:28px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--card);padding:14px 18px;}
.toc-inline summary{cursor:pointer;color:var(--t1);font-size:15px;font-weight:600;list-style:none;}
.toc-inline summary::-webkit-details-marker{display:none;}
.toc-inline summary::after{content:"+";float:right;color:var(--cyan);}
.toc-inline[open] summary::after{content:"–";}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;margin-top:26px;}
.faq-item{border:1px solid var(--line);border-radius:var(--r-card);background:var(--card);overflow:hidden;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--t1);
}
.faq-q i{color:var(--cyan);transition:transform .22s ease;flex-shrink:0;}
.faq-item.open .faq-q i{transform:rotate(45deg);}
.faq-a{display:none;padding:16px 20px;background:var(--bg-3);border-left:2px solid var(--cyan);font-size:15px;line-height:1.8;color:var(--t2);}
.faq-item.open .faq-a{display:block;}

/* ---------- section head ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.section-title{font-size:clamp(22px,2.6vw,30px);line-height:1.35;}
.section-desc{margin-top:8px;font-size:15px;color:var(--t3);max-width:640px;}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.mini-card{
  display:flex;flex-direction:column;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--card);
  box-shadow:var(--shadow);transition:transform .18s cubic-bezier(.22,.61,.36,1),border-color .18s ease,box-shadow .18s ease;
}
.mini-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 14px 32px rgba(0,0,0,.55);}
.mini-thumb{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--bg-2);border-bottom:1px solid var(--line-soft);}
.mini-body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:10px;}
.mini-body h3{font-size:17px;line-height:1.5;}
.mini-body p{font-size:14px;color:var(--t3);line-height:1.7;}

/* ---------- cta band ---------- */
.cta-band{
  margin-top:8px;padding:44px 0;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);
  background-image:linear-gradient(180deg,rgba(11,19,34,.9),rgba(7,11,20,.96));
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,rgba(53,225,255,0),var(--cyan),rgba(255,176,32,0));
  opacity:.7;
}
.cta-inner{max-width:680px;margin:0 auto;text-align:center;display:flex;flex-direction:column;gap:16px;align-items:center;}
.cta-inner h2{font-size:clamp(22px,2.8vw,30px);}
.cta-inner p{color:var(--t3);font-size:15px;}
.cta-btns{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:4px;}
.btn-pill{border-radius:999px;padding-left:28px;padding-right:28px;}

/* ---------- footer ---------- */
.site-footer{background:#05080F;border-top:1px solid var(--line-soft);padding:56px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--t3);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:15px;color:var(--t1);margin-bottom:16px;}
.footer-col a,.footer-col li{display:block;font-size:14px;color:var(--t3);margin-bottom:10px;transition:color .18s ease,transform .18s ease;}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  margin-top:44px;padding:20px 0 26px;border-top:1px solid var(--line-soft);
  font-size:13px;color:var(--t4);
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}

@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,800px);gap:0;}
  .toc{display:none;}
  .toc-inline{display:block;}
}
@media (max-width:1023px){
  .container{padding:0 20px;}
  .header-inner{gap:16px;}
  .nav-link{padding:8px 9px;font-size:14px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .header-inner{height:60px;}
  .main-nav{
    position:fixed;top:60px;left:0;right:0;bottom:0;z-index:59;
    flex-direction:column;align-items:stretch;gap:0;margin:0;padding:12px 16px 88px;
    background:rgba(5,8,15,.98);backdrop-filter:blur(14px);
    border-top:1px solid var(--line-soft);
    transform:translateX(-100%);visibility:hidden;transition:transform .26s cubic-bezier(.22,.61,.36,1),visibility .26s;
    overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0);visibility:visible;}
  .nav-link{padding:0;height:56px;display:flex;align-items:center;font-size:17px;border-bottom:1px solid var(--line-soft);border-radius:0;}
  .nav-link.active::after{display:none;}
  .nav-link.active{color:var(--cyan);}
  .nav-toggle{display:grid;place-items:center;}
  .header-cta{display:none;}
  .read-progress{top:60px;}
  .article-hero{padding:30px 0 28px;}
  .breadcrumb .current{max-width:200px;}
  .section{padding:44px 0;}
  .article-body{font-size:16px;line-height:1.85;}
  .related-grid{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-btns{width:100%;flex-direction:column;}
  .cta-btns .btn{width:100%;}
}
@media (max-width:479px){
  .brand-sub{letter-spacing:.18em;}
  .article-hero h1{font-size:24px;}
  .btn{padding:11px 18px;font-size:14px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category1 */
:root{
  --bg:#070B14;
  --bg-2:#0B1322;
  --bg-3:#0E1729;
  --bg-deep:#05080F;
  --card:rgba(18,28,48,.72);
  --card-solid:#101B2F;
  --line:rgba(90,140,200,.18);
  --line-strong:rgba(53,225,255,.4);
  --divider:rgba(90,140,200,.14);
  --cyan:#35E1FF;
  --cyan-hover:#6BECFF;
  --cyan-press:#1FB8D6;
  --amber:#FFB020;
  --magenta:#FF4D8D;
  --ok:#3DE8A0;
  --warn:#FFC53D;
  --danger:#FF5C6C;
  --t1:#F2F7FF;
  --t2:#C7D3E6;
  --t3:#8A9BB4;
  --t4:#6F819A;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-input:10px;
  --radius-badge:6px;
  --radius-img:10px;
  --shadow-card:0 8px 24px rgba(0,0,0,.45);
  --shadow-card-hover:0 14px 34px rgba(0,0,0,.6);
  --glow-cyan:0 0 0 1px rgba(53,225,255,.5),0 0 24px rgba(53,225,255,.32);
  --glow-cyan-hover:0 0 0 1px rgba(53,225,255,.6),0 0 34px rgba(53,225,255,.44);
  --glow-amber:0 0 0 1px rgba(255,176,32,.5),0 0 24px rgba(255,176,32,.3);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Rajdhani","Saira",system-ui,sans-serif;
  --header-h:68px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--t2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:linear-gradient(rgba(56,225,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(56,225,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(53,225,255,.28);color:#fff;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
@media (min-width:1440px){.container{max-width:1280px;}}
@media (max-width:767px){.container{padding:0 16px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,11,20,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--divider);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,rgba(53,225,255,.55),rgba(53,225,255,0) 45%,rgba(255,176,32,.5));
  opacity:.6;
  pointer-events:none;
}
.header-inner{
  height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:30px;height:30px;
  display:grid;place-items:center;
  border-radius:9px;
  background:linear-gradient(135deg,rgba(53,225,255,.22),rgba(255,176,32,.16));
  border:1px solid rgba(53,225,255,.4);
  color:var(--cyan);
  font-size:14px;
  box-shadow:0 0 18px rgba(53,225,255,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12;}
.brand-main{
  font-size:16px;font-weight:700;letter-spacing:.04em;
  color:var(--t1);
  font-family:var(--font-num);
}
.brand-sub{font-size:11px;color:var(--t3);letter-spacing:.22em;}

.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--t3);
  border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--t1);background:rgba(53,225,255,.06);}
.nav-link.active{color:var(--cyan);text-shadow:0 0 12px rgba(53,225,255,.5);}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(53,225,255,.1));
  box-shadow:0 0 10px rgba(53,225,255,.7);
}
.header-actions{display:flex;align-items:center;gap:12px;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:500;
  border-radius:var(--radius-btn);
  padding:12px 22px;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
  line-height:1;
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan),var(--cyan-press));
  color:#04121A;
  font-weight:700;
  box-shadow:var(--glow-cyan);
}
.btn-primary:hover{background:linear-gradient(135deg,var(--cyan-hover),var(--cyan));transform:translateY(-2px);box-shadow:var(--glow-cyan-hover);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(53,225,255,.45),0 0 14px rgba(53,225,255,.28);}
.btn-amber{
  background:linear-gradient(135deg,var(--amber),#E08A00);
  color:#1A1000;font-weight:700;
  box-shadow:var(--glow-amber);
}
.btn-amber:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,176,32,.6),0 0 34px rgba(255,176,32,.42);}
.btn-amber:active{transform:translateY(1px);}
.btn-ghost{
  border:1px solid rgba(53,225,255,.45);
  color:var(--cyan);
  background:transparent;
}
.btn-ghost:hover{background:rgba(53,225,255,.12);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);background:rgba(53,225,255,.18);}
.btn[disabled]{opacity:.4;box-shadow:none;cursor:not-allowed;transform:none;}
.btn-pill{border-radius:999px;}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--cyan);font-size:14px;font-weight:500;
  transition:color .18s ease;
}
.link-arrow i{transition:transform .18s ease;}
.link-arrow:hover{color:var(--cyan-hover);}
.link-arrow:hover i{transform:translateX(3px);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--radius-btn);
  border:1px solid var(--line);
  color:var(--t1);
  background:rgba(11,19,34,.7);
  align-items:center;justify-content:center;
  font-size:17px;
}

/* ---------- breadcrumb ---------- */
.crumb-bar{
  border-bottom:1px solid var(--divider);
  background:rgba(11,19,34,.5);
}
.crumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);
  padding:12px 0;
  flex-wrap:wrap;
}
.crumb a:hover{color:var(--cyan);}
.crumb .sep{color:var(--t4);}
.crumb .cur{color:var(--cyan);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  min-height:320px;
  display:flex;
  align-items:center;
  background-image:linear-gradient(90deg,rgba(7,11,20,.94) 0%,rgba(7,11,20,.78) 48%,rgba(7,11,20,.62) 100%),url(/assets/images/backpic/back-1.webp);
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--divider);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(53,225,255,.6),rgba(53,225,255,0) 55%,rgba(255,176,32,.45));
}
.hero-inner{padding:52px 0 56px;max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;
  font-size:13px;
  font-weight:500;
  color:var(--cyan);
  border:1px solid rgba(53,225,255,.35);
  background:rgba(53,225,255,.08);
  border-radius:var(--radius-badge);
  letter-spacing:.06em;
}
.hero-title{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.25;
  font-weight:700;
  color:var(--t1);
  margin:18px 0 14px;
  letter-spacing:-.01em;
}
.hero-title em{font-style:normal;color:var(--cyan);}
.hero-sub{
  font-size:16px;
  color:var(--t2);
  max-width:660px;
  margin-bottom:26px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:12px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;color:var(--t2);
  padding:7px 13px;
  border:1px solid var(--line);
  background:rgba(18,28,48,.6);
  border-radius:var(--radius-badge);
}
.chip i{color:var(--cyan);font-size:12px;}
.chip.amber i{color:var(--amber);}

/* ---------- energy rail ---------- */
.energy-rail{
  display:flex;align-items:center;gap:14px;
  padding:16px 0 0;
  margin-top:6px;
  max-width:520px;
}
.rail-line{
  position:relative;
  flex:1;
  height:8px;
  border-radius:999px;
  background:rgba(90,140,200,.16);
  overflow:hidden;
}
.rail-line span{
  position:absolute;inset:0 42% 0 0;
  border-radius:999px;
  background:linear-gradient(90deg,var(--cyan),rgba(53,225,255,.15));
}
.rail-dots{display:flex;align-items:center;gap:8px;}
.rail-dot{
  width:12px;height:12px;border-radius:50%;
  background:rgba(90,140,200,.3);
}
.rail-dot.on{
  background:var(--cyan);
  box-shadow:0 0 12px rgba(53,225,255,.75);
  animation:breathe 1.8s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:1;}50%{opacity:.68;}}
.rail-num{font-family:var(--font-num);font-size:15px;color:var(--t3);letter-spacing:.04em;}
.rail-num b{color:var(--cyan);font-size:20px;font-weight:700;}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:40px;
}
.section-head .title-wrap{max-width:720px;}
.section-tag{
  font-size:12px;letter-spacing:.18em;color:var(--cyan);
  text-transform:uppercase;font-family:var(--font-num);
  display:block;margin-bottom:10px;
}
h2{
  font-size:clamp(24px,3vw,34px);
  line-height:1.35;
  color:var(--t1);
  font-weight:700;
}
.section-lead{font-size:15px;color:var(--t3);margin-top:10px;max-width:620px;}

/* ---------- line cards ---------- */
.line-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.card::after{
  content:"";
  position:absolute;
  top:0;left:16%;right:16%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,225,255,.45),transparent);
  opacity:.7;
  pointer-events:none;
}
.card:hover{
  border-color:var(--line-strong);
  transform:translateY(-3px);
  box-shadow:var(--shadow-card-hover);
}
.line-card{padding:22px 22px 20px;display:flex;flex-direction:column;gap:12px;}
.line-card::before{
  content:"";
  position:absolute;top:12px;left:12px;
  width:12px;height:12px;
  background:linear-gradient(135deg,transparent 0 46%,rgba(53,225,255,.55) 46% 54%,transparent 54% 100%);
  opacity:.8;
  pointer-events:none;
}
.line-top{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;padding-left:18px;}
.line-name{font-size:19px;font-weight:700;color:var(--t1);line-height:1.4;}
.line-meta{font-size:13px;color:var(--t4);font-family:var(--font-num);white-space:nowrap;letter-spacing:.03em;}
.line-desc{font-size:14px;color:var(--t2);min-height:44px;}
.line-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--divider);padding-top:12px;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:500;
  padding:3px 10px;
  border-radius:var(--radius-badge);
  line-height:1.6;
}
.badge i{font-size:8px;}
.badge-ok{color:var(--ok);border:1px solid rgba(61,232,160,.45);background:rgba(61,232,160,.1);}
.badge-warn{color:var(--warn);border:1px solid rgba(255,197,61,.45);background:rgba(255,197,61,.1);}
.badge-cyan{color:var(--cyan);border:1px solid rgba(53,225,255,.45);background:rgba(53,225,255,.1);}
.badge-magenta{color:var(--magenta);border:1px solid rgba(255,77,141,.4);background:rgba(255,77,141,.1);}

/* ---------- steps (5:7 asymmetric) ---------- */
.steps-layout{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:48px;
  align-items:start;
}
.steps-aside{position:sticky;top:calc(var(--header-h) + 28px);}
.steps-aside h2{margin-bottom:14px;}
.steps-aside p{font-size:15px;color:var(--t3);margin-bottom:22px;}
.aside-note{
  border-left:2px solid var(--amber);
  background:var(--bg-3);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  padding:14px 18px;
  font-size:14px;
  color:var(--t2);
}
.step-item{
  display:grid;
  grid-template-columns:56px 1fr;
  gap:20px;
  padding:22px 0;
  border-bottom:1px dashed var(--divider);
}
.step-item:last-child{border-bottom:0;}
.step-num{
  font-family:var(--font-num);
  font-size:26px;font-weight:700;
  color:var(--cyan);
  line-height:1.2;
  letter-spacing:.04em;
  text-shadow:0 0 18px rgba(53,225,255,.35);
}
.step-item h3{font-size:18px;color:var(--t1);margin-bottom:6px;font-weight:700;}
.step-item p{font-size:15px;color:var(--t2);}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--divider);max-width:900px;}
.faq-item{border-bottom:1px solid var(--divider);}
.faq-q{
  width:100%;
  min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  text-align:left;
  font-size:16px;
  font-weight:500;
  color:var(--t1);
  padding:14px 4px;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--cyan);}
.faq-q .plus{
  flex-shrink:0;
  width:26px;height:26px;
  display:grid;place-items:center;
  border-radius:8px;
  border:1px solid var(--line);
  color:var(--cyan);
  font-size:12px;
  transition:transform .22s ease,border-color .22s ease,background .22s ease;
}
.faq-item.open .faq-q .plus{transform:rotate(45deg);background:rgba(53,225,255,.12);border-color:rgba(53,225,255,.5);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .26s ease;
}
.faq-item.open .faq-a{max-height:520px;}
.faq-a-inner{
  background:var(--bg-3);
  border-left:2px solid var(--cyan);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  padding:16px 20px;
  font-size:15px;
  color:var(--t2);
  margin:0 0 18px;
}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;
  border-top:1px solid var(--divider);
  border-bottom:1px solid var(--divider);
  background:linear-gradient(180deg,rgba(11,19,34,.9),rgba(7,11,20,.95));
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;left:-10%;right:-10%;top:50%;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,225,255,.7),rgba(255,176,32,.5),transparent);
  opacity:.55;
  animation:slide 6s linear infinite;
}
@keyframes slide{0%{transform:translateX(-6%);}50%{transform:translateX(6%);}100%{transform:translateX(-6%);}}
.cta-inner{
  padding:70px 0;
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:16px;
}
.cta-inner h2{max-width:640px;}
.cta-inner p{font-size:15px;color:var(--t3);max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:center;margin-top:8px;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--divider);
  padding-top:64px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand p{
  font-size:14px;
  color:var(--t3);
  margin-top:16px;
  max-width:320px;
  line-height:1.8;
}
.footer-col h4{
  font-size:15px;color:var(--t1);font-weight:700;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col a,.footer-col li{
  display:block;
  font-size:14px;
  color:var(--t3);
  line-height:2.1;
  transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid var(--divider);
  padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t4);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .26s cubic-bezier(.22,.61,.36,1),transform .26s cubic-bezier(.22,.61,.36,1);}
.reveal.in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (min-width:1024px) and (max-width:1279px){
  .container{padding:0 24px;}
  .section{padding:72px 0;}
  .steps-layout{gap:36px;}
}
@media (max-width:1023px){
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;bottom:0;
    background:rgba(7,11,20,.98);
    backdrop-filter:blur(14px);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px 16px 120px;
    transform:translateX(-100%);
    transition:transform .26s cubic-bezier(.22,.61,.36,1);
    overflow-y:auto;
    z-index:90;
  }
  .main-nav.open{transform:translateX(0);}
  .nav-link{
    font-size:17px;
    line-height:56px;
    padding:0 6px;
    border-bottom:1px solid var(--divider);
    border-radius:0;
  }
  .nav-link.active::after{left:6px;right:auto;width:44px;bottom:14px;}
  .steps-layout{grid-template-columns:1fr;gap:28px;}
  .steps-aside{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:64px 0;}
}
@media (max-width:767px){
  .header-cta{display:none;}
  .header-inner{gap:12px;}
  .line-grid{grid-template-columns:1fr;}
  .page-hero{min-height:auto;}
  .hero-inner{padding:36px 0 40px;}
  .section{padding:48px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px;}
  .step-item{grid-template-columns:44px 1fr;gap:14px;padding:18px 0;}
  .step-num{font-size:22px;}
  .cta-inner{padding:52px 0;}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .energy-rail{max-width:100%;}
}
@media (max-width:479px){
  .hero-title{font-size:28px;}
  .btn{padding:11px 18px;font-size:14px;}
  .hero-cta .btn{width:100%;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .line-top{flex-direction:column;gap:6px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1 !important;transform:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --bg:#070B14;
  --bg-2:#0B1322;
  --panel:rgba(18,28,48,.72);
  --panel-solid:#0E1729;
  --line:rgba(90,140,200,.18);
  --line-soft:rgba(90,140,200,.14);
  --line-strong:rgba(53,225,255,.4);
  --cyan:#35E1FF;
  --cyan-hover:#6BECFF;
  --cyan-active:#1FB8D6;
  --amber:#FFB020;
  --magenta:#FF4D8D;
  --green:#3DE8A0;
  --warn:#FFC53D;
  --danger:#FF5C6C;
  --title:#F2F7FF;
  --text:#C7D3E6;
  --muted:#8A9BB4;
  --placeholder:#6F819A;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-input:10px;
  --radius-badge:6px;
  --shadow-card:0 8px 24px rgba(0,0,0,.45);
  --shadow-hover:0 16px 40px rgba(0,0,0,.6);
  --glow-cyan:0 0 0 1px rgba(53,225,255,.5),0 0 24px rgba(53,225,255,.32);
  --glow-cyan-hover:0 0 0 1px rgba(107,236,255,.6),0 0 34px rgba(53,225,255,.42);
  --glow-amber:0 0 0 1px rgba(255,176,32,.5),0 0 24px rgba(255,176,32,.3);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Saira","Rajdhani","Helvetica Neue",Arial,sans-serif;
}
*,*::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:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  overflow-x:hidden;
  position:relative;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:linear-gradient(rgba(56,225,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(56,225,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5{margin:0;color:var(--title);font-weight:700;line-height:1.35;}
p{margin:0;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  border-radius:4px;
}
::selection{background:rgba(53,225,255,.28);color:#fff;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
@media (min-width:1440px){ .container{max-width:1280px;} }
@media (max-width:767px){ .container{padding:0 16px;} }

/* ============ HEADER ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(7,11,20,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,rgba(53,225,255,.5),rgba(53,225,255,0) 50%,rgba(255,176,32,.5));
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:28px;height:28px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:8px;
  background:linear-gradient(140deg,rgba(53,225,255,.22),rgba(255,176,32,.16));
  border:1px solid rgba(53,225,255,.4);
  color:var(--cyan);
  font-size:13px;
  box-shadow:0 0 14px rgba(53,225,255,.24);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-main{color:var(--title);font-size:16px;font-weight:700;letter-spacing:.02em;}
.brand-sub{color:var(--muted);font-size:11px;letter-spacing:.16em;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:15px;
  color:var(--muted);
  border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--title);background:rgba(53,225,255,.06);}
.nav-link.active{color:var(--cyan);text-shadow:0 0 12px rgba(53,225,255,.45);}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(53,225,255,.7);
}
.header-actions{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:rgba(53,225,255,.06);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--cyan);
  cursor:pointer;
  transition:background .18s ease,border-color .18s ease;
}
.nav-toggle:hover{background:rgba(53,225,255,.14);border-color:var(--line-strong);}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-size:15px;
  font-weight:500;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease,opacity .18s ease;
  white-space:nowrap;
}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan),#1FA9CC);
  color:#04121A;
  font-weight:700;
  box-shadow:var(--glow-cyan);
}
.btn-primary:hover{background:linear-gradient(135deg,var(--cyan-hover),#2ABEDF);box-shadow:var(--glow-cyan-hover);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(53,225,255,.45),0 0 12px rgba(53,225,255,.24);}
.btn-ghost{
  background:transparent;
  border-color:rgba(53,225,255,.45);
  color:var(--cyan);
}
.btn-ghost:hover{background:rgba(53,225,255,.12);transform:translateY(-2px);border-color:var(--cyan);}
.btn-ghost:active{transform:translateY(1px);}
.btn-amber{
  background:linear-gradient(135deg,var(--amber),#E08A00);
  color:#1B0F00;
  font-weight:700;
  box-shadow:var(--glow-amber);
}
.btn-amber:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,196,80,.6),0 0 30px rgba(255,176,32,.42);}
.btn-amber:active{transform:translateY(1px);}
.btn-pill{border-radius:999px;}
.btn[disabled],.btn.is-disabled{opacity:.4;box-shadow:none;cursor:not-allowed;transform:none;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--cyan);
  font-size:14px;
  font-weight:500;
}
.link-arrow i,.link-arrow .arw{transition:transform .18s ease;}
.link-arrow:hover .arw{transform:translateX(3px);}

/* ============ BADGES ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-size:14px;
  font-weight:500;
  border-radius:var(--radius-badge);
  border:1px solid rgba(53,225,255,.4);
  background:rgba(53,225,255,.1);
  color:var(--cyan);
  line-height:1.4;
}
.badge-amber{border-color:rgba(255,176,32,.42);background:rgba(255,176,32,.12);color:var(--amber);}
.badge-magenta{border-color:rgba(255,77,141,.42);background:rgba(255,77,141,.12);color:var(--magenta);}
.badge-green{border-color:rgba(61,232,160,.42);background:rgba(61,232,160,.12);color:var(--green);}
.badge-muted{border-color:var(--line);background:rgba(90,140,200,.08);color:var(--muted);}

/* ============ SECTION ============ */
.section{padding:88px 0;position:relative;}
.section-alt{background:linear-gradient(180deg,rgba(11,19,34,0),rgba(11,19,34,.72) 30%,rgba(11,19,34,0));}
.section-head{margin-bottom:40px;}
.section-head .eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--cyan);
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(24px,3vw,34px);
  line-height:1.35;
  margin-bottom:12px;
}
.section-head .lead{
  color:var(--muted);
  font-size:15px;
  max-width:720px;
}
.head-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ============ HERO ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:64px 0 72px;
  border-bottom:1px solid var(--line-soft);
}
.page-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  opacity:.36;
  z-index:0;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(7,11,20,.94) 0%,rgba(7,11,20,.78) 46%,rgba(7,11,20,.56) 100%);
  z-index:0;
}
.hero-inner{position:relative;z-index:1;}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  margin-bottom:20px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--muted);transition:color .18s ease;}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb .sep{color:rgba(138,155,180,.5);}
.breadcrumb .current{color:var(--cyan);}
.page-hero h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.25;
  max-width:860px;
  margin:16px 0 18px;
}
.page-hero .hero-desc{
  max-width:700px;
  font-size:16px;
  color:var(--text);
  line-height:1.9;
}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;
  margin-top:38px;
  background:var(--line-soft);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
}
.hero-metric{
  background:rgba(11,19,34,.78);
  padding:20px 22px;
}
.hero-metric .k{
  font-family:var(--font-num);
  font-size:32px;
  font-weight:700;
  color:var(--cyan);
  line-height:1.1;
  display:block;
}
.hero-metric .k.amber{color:var(--amber);}
.hero-metric .k small{font-size:15px;color:var(--muted);font-weight:500;margin-left:4px;}
.hero-metric .t{
  display:block;
  font-size:14px;
  color:var(--muted);
  margin-top:6px;
}
.hero-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  margin-top:34px;
}
.energy-bar{
  height:8px;
  border-radius:999px;
  background:rgba(90,140,200,.16);
  overflow:hidden;
  margin-top:44px;
  position:relative;
}
.energy-bar span{
  display:block;height:100%;width:38%;
  border-radius:999px;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  box-shadow:0 0 16px rgba(53,225,255,.5);
}

/* ============ TIMELINE ============ */
.timeline{position:relative;margin-top:8px;}
.timeline::before{
  content:"";
  position:absolute;
  top:0;bottom:0;left:50%;
  width:1px;
  transform:translateX(-50%);
  background:linear-gradient(180deg,rgba(53,225,255,.05),rgba(53,225,255,.45) 12%,rgba(90,140,200,.22) 88%,rgba(90,140,200,.04));
}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  padding-bottom:56px;
}
.tl-item:last-child{padding-bottom:0;}
.tl-node{
  position:absolute;
  left:50%;top:50%;
  width:12px;height:12px;
  margin-left:-6px;
  border-radius:50%;
  background:#0B1322;
  border:2px solid rgba(90,140,200,.55);
  z-index:2;
  transform:translateY(-50%);
}
.tl-node.is-current{
  border-color:var(--cyan);
  background:var(--cyan);
  box-shadow:0 0 14px rgba(53,225,255,.8);
  animation:pulse 1.8s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.7;}}
.tl-body{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 26px 24px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  clip-path:polygon(0 0,calc(100% - 6px) 0,100% 6px,100% 100%,0 100%);
  position:relative;
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.tl-body::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(53,225,255,.7),rgba(53,225,255,0));
}
.tl-body:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.tl-body .ver{
  font-family:var(--font-num);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--amber);
  display:block;
  margin-bottom:8px;
}
.tl-body h3{font-size:20px;margin-bottom:10px;}
.tl-body p{font-size:15px;color:var(--muted);line-height:1.8;}
.tl-body ul{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.tl-body ul li{
  position:relative;
  padding-left:16px;
  font-size:14px;
  color:var(--text);
}
.tl-body ul li::before{
  content:"";
  position:absolute;left:0;top:11px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--cyan);
}
.tl-media{
  border-radius:12px;
  overflow:hidden;
  border:1px solid var(--line);
  background:#0B1322;
  position:relative;
  aspect-ratio:16/9;
}
.tl-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.tl-item:hover .tl-media img{transform:scale(1.03);}
.tl-media .tagline{
  position:absolute;
  left:12px;top:12px;
}
.tl-item.rev .tl-media{order:2;}
.tl-item.rev .tl-body{order:1;}

/* ============ PLAY BLOCKS ============ */
.play-block{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:44px;
  align-items:center;
  padding:28px 0;
  border-bottom:1px solid var(--line-soft);
}
.play-block:last-child{border-bottom:0;}
.play-block.rev{grid-template-columns:7fr 5fr;}
.play-block.rev .pb-media{order:2;}
.play-block.rev .pb-text{order:1;}
.pb-media{
  border-radius:12px;
  overflow:hidden;
  border:1px solid var(--line);
  background:#0B1322;
  aspect-ratio:16/10;
  position:relative;
}
.pb-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.play-block:hover .pb-media img{transform:scale(1.03);}
.pb-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,0) 45%,rgba(7,11,20,.7));
  pointer-events:none;
}
.pb-index{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--cyan);
  display:block;
  margin-bottom:10px;
}
.pb-text h3{font-size:22px;margin-bottom:12px;}
.pb-text p{font-size:15px;color:var(--muted);line-height:1.85;}
.pb-list{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.pb-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--text);
}
.pb-list li i{color:var(--cyan);font-size:12px;margin-top:6px;}

/* ============ PROGRESS STRIP ============ */
.track-strip{
  display:flex;
  align-items:center;
  gap:12px;
  margin-top:26px;
}
.track{
  flex:1;
  height:8px;
  border-radius:999px;
  background:rgba(90,140,200,.16);
  position:relative;
  overflow:visible;
}
.track i{
  position:absolute;left:0;top:0;bottom:0;
  border-radius:999px;
  background:linear-gradient(90deg,rgba(53,225,255,.9),rgba(255,176,32,.9));
}
.track .dot{
  position:absolute;
  top:50%;
  width:12px;height:12px;
  margin-top:-6px;margin-left:-6px;
  border-radius:50%;
  background:#0B1322;
  border:2px solid rgba(90,140,200,.6);
}
.track .dot.on{
  border-color:var(--cyan);
  background:var(--cyan);
  box-shadow:0 0 12px rgba(53,225,255,.75);
  animation:pulse 1.8s ease-in-out infinite;
}
.track-num{
  font-family:var(--font-num);
  font-size:14px;
  color:var(--title);
  white-space:nowrap;
}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--panel);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .18s ease;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:0 20px;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:16px;
  color:var(--title);
  font-weight:500;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .plus{
  flex-shrink:0;
  width:22px;height:22px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--cyan);
  font-size:16px;
  transition:transform .22s ease;
}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-item .faq-body{
  background:var(--panel-solid);
  border-left:2px solid var(--cyan);
  padding:16px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--text);
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  padding:56px 0;
  background:linear-gradient(120deg,rgba(14,23,41,.95),rgba(9,15,26,.95));
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(53,225,255,0) 45%,var(--amber));
  opacity:.7;
}
.cta-inner{
  max-width:640px;
  margin:0 auto;
  text-align:center;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px;}
.cta-inner p{color:var(--muted);font-size:15px;margin-bottom:26px;}
.cta-actions{display:flex;justify-content:center;align-items:center;gap:18px;flex-wrap:wrap;}

/* ============ FOOTER ============ */
.site-footer{
  background:#05080F;
  border-top:1px solid var(--line-soft);
  padding:64px 0 0;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{
  font-size:14px;
  color:var(--muted);
  line-height:1.85;
  max-width:320px;
}
.footer-col h4{
  font-size:15px;
  color:var(--title);
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:var(--muted);
  margin-bottom:10px;
  transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px);}
.footer-col ul li{
  font-size:14px;
  color:var(--muted);
  margin-bottom:10px;
  line-height:1.7;
}
.footer-bottom{
  border-top:1px solid var(--line-soft);
  padding:20px 0 26px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--muted);
}

/* ============ RESPONSIVE ============ */
@media (max-width:1279px){
  .section{padding:76px 0;}
}
@media (max-width:1023px){
  .section{padding:64px 0;}
  .main-nav{
    position:fixed;
    top:68px;left:0;right:0;bottom:0;
    background:rgba(7,11,20,.98);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:16px 16px 100px;
    transform:translateY(-8px);
    opacity:0;
    visibility:hidden;
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-link{
    font-size:17px;
    padding:0 4px;
    height:56px;
    display:flex;
    align-items:center;
    border-bottom:1px solid var(--line-soft);
    border-radius:0;
  }
  .nav-link.active::after{left:4px;right:auto;width:28px;bottom:14px;}
  .nav-toggle{display:inline-flex;}
  .header-cta{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .tl-item,.play-block,.play-block.rev{
    grid-template-columns:1fr;
    gap:22px;
  }
  .tl-item.rev .tl-media{order:0;}
  .tl-item.rev .tl-body{order:0;}
  .play-block.rev .pb-media{order:0;}
  .play-block.rev .pb-text{order:0;}
}
@media (max-width:767px){
  .section{padding:48px 0;}
  .page-hero{padding:44px 0 52px;}
  .hero-metrics{grid-template-columns:1fr;}
  .hero-metric .k{font-size:26px;}
  .hero-actions .btn{width:100%;}
  .timeline::before{left:6px;}
  .tl-node{left:6px;}
  .tl-item{padding-left:30px;padding-bottom:36px;}
  .tl-body{padding:20px 18px;}
  .faq-item summary{font-size:15px;padding:0 16px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .cta-actions .btn{width:100%;}
}
@media (max-width:520px){
  .brand-sub{letter-spacing:.1em;}
  .page-hero h1{font-size:27px;}
  .section-head h2{font-size:22px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category3 */
:root{
  --bg:#070B14;
  --bg-2:#0B1322;
  --bg-3:#0E1729;
  --bg-deep:#05080F;
  --card:rgba(18,28,48,0.72);
  --line:rgba(90,140,200,0.18);
  --line-soft:rgba(90,140,200,0.14);
  --line-strong:rgba(90,140,200,0.32);
  --cyan:#35E1FF;
  --cyan-hover:#6BECFF;
  --cyan-active:#1FB8D6;
  --amber:#FFB020;
  --amber-soft:rgba(255,176,32,0.14);
  --magenta:#FF4D8D;
  --ok:#3DE8A0;
  --warn:#FFC53D;
  --err:#FF5C6C;
  --t1:#F2F7FF;
  --t2:#C7D3E6;
  --t3:#8A9BB4;
  --t4:#6F819A;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-input:10px;
  --radius-badge:6px;
  --radius-img:10px;
  --shadow-card:0 8px 24px rgba(0,0,0,0.45);
  --shadow-card-hover:0 14px 34px rgba(0,0,0,0.58);
  --glow-cyan:0 0 0 1px rgba(53,225,255,0.5),0 0 24px rgba(53,225,255,0.32);
  --glow-cyan-hover:0 0 0 1px rgba(107,236,255,0.62),0 0 34px rgba(53,225,255,0.42);
  --glow-amber:0 0 0 1px rgba(255,176,32,0.5),0 0 24px rgba(255,176,32,0.3);
  --glow-amber-hover:0 0 0 1px rgba(255,196,90,0.66),0 0 34px rgba(255,176,32,0.4);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Saira","Rajdhani","PingFang SC",ui-monospace,system-ui,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

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

body{
  margin:0;
  background:var(--bg);
  color:var(--t2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  min-height:100vh;
  position:relative;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(56,225,255,0.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,225,255,0.035) 1px,transparent 1px);
  background-size:24px 24px;
  pointer-events:none;
  z-index:0;
}

img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
input,textarea,select{font-family:inherit;font-size:15px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{color:var(--t1);font-weight:700;line-height:1.35;}

:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}

/* ============ HEADER ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,11,20,0.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,rgba(53,225,255,0.5),rgba(53,225,255,0) 45%,rgba(255,176,32,0.45));
  opacity:.85;
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:32px;height:32px;
  display:grid;place-items:center;
  border-radius:9px;
  background:linear-gradient(135deg,rgba(53,225,255,0.22),rgba(255,176,32,0.16));
  border:1px solid rgba(53,225,255,0.4);
  color:var(--cyan);
  font-size:15px;
  box-shadow:0 0 18px rgba(53,225,255,0.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12;}
.brand-main{
  font-size:16px;
  font-weight:700;
  color:var(--t1);
  letter-spacing:.02em;
}
.brand-sub{
  font-size:11px;
  color:var(--t3);
  letter-spacing:.24em;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--t3);
  padding:6px 2px;
  transition:color 180ms var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(53,225,255,0.2));
  opacity:0;
  transform:scaleX(.4);
  transform-origin:left center;
  transition:opacity 180ms var(--ease),transform 180ms var(--ease);
}
.nav-link:hover{color:var(--t1);}
.nav-link:hover::after{opacity:.5;transform:scaleX(1);}
.nav-link.active{color:var(--cyan);text-shadow:0 0 12px rgba(53,225,255,0.45);}
.nav-link.active::after{opacity:1;transform:scaleX(1);}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--t2);
  font-size:17px;
  background:rgba(11,19,34,0.6);
}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:500;
  border-radius:var(--radius-btn);
  padding:12px 22px;
  border:1px solid transparent;
  transition:transform 180ms var(--ease),background 180ms var(--ease),box-shadow 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),filter 180ms var(--ease);
  line-height:1.2;
  text-align:center;
}
.btn-primary{
  background:var(--cyan);
  color:#04121A;
  font-weight:700;
  box-shadow:var(--glow-cyan);
}
.btn-primary:hover{background:var(--cyan-hover);transform:translateY(-2px);box-shadow:var(--glow-cyan-hover);filter:brightness(1.06);}
.btn-primary:active{background:var(--cyan-active);transform:translateY(1px);box-shadow:0 0 0 1px rgba(53,225,255,0.45),0 0 14px rgba(53,225,255,0.24);}
.btn-amber{
  background:var(--amber);
  color:#1A1204;
  font-weight:700;
  box-shadow:var(--glow-amber);
}
.btn-amber:hover{background:#FFC155;transform:translateY(-2px);box-shadow:var(--glow-amber-hover);}
.btn-amber:active{background:#E59A12;transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,176,32,0.45),0 0 14px rgba(255,176,32,0.22);}
.btn-ghost{
  background:transparent;
  border-color:rgba(53,225,255,0.45);
  color:var(--cyan);
}
.btn-ghost:hover{background:rgba(53,225,255,0.12);transform:translateY(-2px);border-color:var(--cyan);}
.btn-ghost:active{transform:translateY(1px);background:rgba(53,225,255,0.18);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-lg{padding:15px 34px;font-size:16px;border-radius:999px;}
.btn[disabled],.btn.is-disabled{opacity:.4;box-shadow:none;pointer-events:none;}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--cyan);
  font-size:14px;
  transition:color 180ms var(--ease),gap 180ms var(--ease);
}
.text-link i{transition:transform 180ms var(--ease);font-size:12px;}
.text-link:hover{color:var(--cyan-hover);}
.text-link:hover i{transform:translateX(3px);}

/* ============ BADGES ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  font-weight:500;
  padding:3px 10px;
  border-radius:var(--radius-badge);
  border:1px solid;
  line-height:1.6;
  white-space:nowrap;
}
.badge-cyan{color:var(--cyan);border-color:rgba(53,225,255,0.45);background:rgba(53,225,255,0.1);}
.badge-amber{color:var(--amber);border-color:rgba(255,176,32,0.45);background:var(--amber-soft);}
.badge-magenta{color:var(--magenta);border-color:rgba(255,77,141,0.42);background:rgba(255,77,141,0.12);}
.badge-ok{color:var(--ok);border-color:rgba(61,232,160,0.42);background:rgba(61,232,160,0.1);}
.badge-warn{color:var(--warn);border-color:rgba(255,197,61,0.42);background:rgba(255,197,61,0.1);}
.badge-mute{color:var(--t3);border-color:var(--line);background:rgba(90,140,200,0.08);}

/* ============ HERO ============ */
.hero{
  position:relative;
  padding:52px 0 0;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  top:-160px;
  right:-120px;
  width:520px;height:520px;
  background:radial-gradient(circle,rgba(53,225,255,0.13),transparent 62%);
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  bottom:40px;
  left:-140px;
  width:420px;height:420px;
  background:radial-gradient(circle,rgba(255,176,32,0.08),transparent 66%);
  pointer-events:none;
}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
  padding-bottom:56px;
}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--t3);
  margin-bottom:20px;
}
.breadcrumb i{font-size:10px;color:var(--t4);}
.breadcrumb .current{color:var(--cyan);}
.hero-copy .badge{margin-bottom:18px;}
.hero h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.25;
  letter-spacing:-0.01em;
  margin-bottom:20px;
}
.hero-sub{
  font-size:16px;
  line-height:1.85;
  color:var(--t2);
  max-width:560px;
  margin-bottom:28px;
}
.hero-cta{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:32px;
}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.stat-chip{
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:10px;
  border:1px solid var(--line);
  background:rgba(11,19,34,0.58);
  font-size:13px;
  color:var(--t3);
}
.stat-chip strong{
  font-family:var(--font-num);
  font-size:18px;
  color:var(--cyan);
  font-weight:700;
  letter-spacing:.02em;
}
.hero-visual{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  background:var(--bg-2);
}
.hero-visual img{
  width:100%;
  height:360px;
  object-fit:cover;
  opacity:.92;
}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,0.24),rgba(7,11,20,0.72));
  pointer-events:none;
}
.hero-visual-tag{
  position:absolute;
  left:18px;
  bottom:18px;
  z-index:2;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--t2);
  background:rgba(7,11,20,0.72);
  border:1px solid var(--line);
  border-radius:8px;
  padding:7px 12px;
  backdrop-filter:blur(6px);
}
.hero-visual-tag .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 10px rgba(255,176,32,0.8);
}

/* energy bar */
.hero-energy{
  position:relative;
  height:4px;
  background:rgba(90,140,200,0.16);
  overflow:hidden;
}
.hero-energy::after{
  content:"";
  position:absolute;
  top:0;left:0;bottom:0;
  width:38%;
  background:linear-gradient(90deg,rgba(53,225,255,0),var(--cyan),var(--amber));
  border-radius:999px;
  animation:energySlide 4.6s var(--ease) infinite;
}
@keyframes energySlide{
  0%{transform:translateX(-40%);}
  50%{transform:translateX(120%);}
  100%{transform:translateX(260%);}
}

/* ============ SECTION ============ */
.section{padding:88px 0;position:relative;}
.section-alt{background:linear-gradient(180deg,rgba(11,19,34,0.72),rgba(7,11,20,0));}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:36px;
}
.section-head h2{
  font-size:clamp(24px,3vw,34px);
  margin-bottom:10px;
}
.section-head p{
  color:var(--t3);
  font-size:15px;
  max-width:620px;
}

/* ============ CARDS ============ */
.card{
  position:relative;
  background:
    linear-gradient(var(--card),var(--card)) padding-box,
    linear-gradient(135deg,rgba(53,225,255,0.34),rgba(90,140,200,0.16) 42%,rgba(255,176,32,0.24)) border-box;
  border:1px solid transparent;
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  clip-path:polygon(14px 0,100% 0,100% 100%,0 100%,0 14px);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);
}
.card::before{
  content:"";
  position:absolute;
  top:0;
  left:14px;
  right:0;
  height:1px;
  background:linear-gradient(90deg,rgba(53,225,255,0.72),rgba(53,225,255,0) 62%);
  border-radius:2px;
}
.card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-card-hover);
}

/* ============ REWARD GRID ============ */
.reward-layout{
  display:grid;
  grid-template-columns:8fr 4fr;
  gap:28px;
  align-items:start;
}
.reward-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.reward-grid > .reward-card:nth-child(even){transform:translateY(24px);}
.reward-grid > .reward-card:nth-child(even):hover{transform:translateY(21px);}

.reward-card{overflow:hidden;}
.reward-media{
  position:relative;
  margin:12px;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
}
.reward-media img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  transition:transform 320ms var(--ease);
}
.reward-card:hover .reward-media img{transform:scale(1.03);}
.reward-media .badge{
  position:absolute;
  top:10px;
  left:10px;
  backdrop-filter:blur(6px);
  background-color:rgba(7,11,20,0.66);
}
.reward-count{
  position:absolute;
  right:10px;
  bottom:10px;
  font-family:var(--font-num);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--amber);
  background:rgba(7,11,20,0.74);
  border:1px solid rgba(255,176,32,0.4);
  border-radius:6px;
  padding:3px 9px;
}
.reward-body{padding:6px 18px 20px;}
.reward-title-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:8px;
}
.reward-title-row h3{font-size:18px;}
.reward-body p{
  font-size:14px;
  color:var(--t3);
  line-height:1.75;
  margin-bottom:16px;
  min-height:48px;
}
.progress{
  height:8px;
  border-radius:999px;
  background:rgba(90,140,200,0.16);
  overflow:hidden;
}
.progress span{
  display:block;
  height:100%;
  border-radius:999px;
  background:linear-gradient(90deg,rgba(255,176,32,0.65),var(--amber));
  box-shadow:0 0 12px rgba(255,176,32,0.4);
}
.reward-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-top:10px;
  font-size:13px;
  color:var(--t3);
}
.reward-foot .num{
  font-family:var(--font-num);
  color:var(--t2);
  letter-spacing:.04em;
}

/* side info */
.side-panel{
  padding:26px 22px 24px;
  position:sticky;
  top:92px;
}
.side-panel h3{
  font-size:19px;
  margin-bottom:14px;
}
.side-panel .side-note{
  font-size:14px;
  color:var(--t3);
  line-height:1.8;
  margin-bottom:20px;
}
.side-list{margin-bottom:22px;}
.side-list li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--t2);
  padding:11px 0;
  border-bottom:1px dashed var(--line-soft);
  line-height:1.7;
}
.side-list li:last-child{border-bottom:none;}
.side-list i{
  color:var(--cyan);
  font-size:13px;
  margin-top:5px;
  flex-shrink:0;
}
.side-stage{
  border-radius:10px;
  border:1px solid var(--line);
  background:rgba(14,23,41,0.7);
  padding:14px 16px;
  margin-bottom:20px;
}
.side-stage-label{
  display:flex;
  justify-content:space-between;
  font-size:13px;
  color:var(--t3);
  margin-bottom:9px;
}
.side-stage-label .num{font-family:var(--font-num);color:var(--cyan);letter-spacing:.05em;}
.side-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px;}

/* ============ STAGE TRACK ============ */
.track{
  position:relative;
  margin:12px 0 40px;
  padding:0 6px;
}
.track-line{
  position:absolute;
  left:0;right:0;
  top:8px;
  height:8px;
  border-radius:999px;
  background:rgba(90,140,200,0.16);
  overflow:hidden;
}
.track-line span{
  display:block;
  height:100%;
  width:62%;
  border-radius:999px;
  background:linear-gradient(90deg,var(--cyan),rgba(255,176,32,0.85));
}
.stages{
  position:relative;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
}
.stage{
  position:relative;
  padding-top:0;
  text-align:left;
}
.stage-node{
  position:relative;
  z-index:2;
  width:12px;height:12px;
  border-radius:50%;
  background:var(--bg-2);
  border:2px solid var(--line-strong);
  margin:6px 0 16px;
}
.stage.is-done .stage-node{background:var(--ok);border-color:var(--ok);}
.stage.is-active .stage-node{
  background:var(--cyan);
  border-color:var(--cyan);
  box-shadow:0 0 14px rgba(53,225,255,0.7);
  animation:nodePulse 1.8s ease-in-out infinite;
}
@keyframes nodePulse{
  0%,100%{opacity:1;}
  50%{opacity:.7;}
}
.stage-meta{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:10px;
  margin-bottom:4px;
}
.stage-name{font-size:16px;color:var(--t1);font-weight:700;}
.stage-num{
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--t4);
}
.stage p{font-size:14px;color:var(--t3);line-height:1.75;}

/* ============ STATUS CARDS ============ */
.status-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.status-card{
  padding:22px 20px;
  border-left:3px solid var(--line-strong);
}
.status-card h3{font-size:17px;margin-bottom:10px;display:flex;align-items:center;gap:10px;}
.status-card p{font-size:14px;color:var(--t3);line-height:1.78;margin-bottom:16px;}
.status-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--t4);
  padding-top:14px;
  border-top:1px dashed var(--line-soft);
}
.status-meta .num{font-family:var(--font-num);letter-spacing:.05em;color:var(--t2);}
.status-card.is-done{border-left-color:var(--ok);}
.status-card.is-active{border-left-color:var(--cyan);}
.status-card.is-locked{border-left-color:var(--line-strong);opacity:.86;}

/* ============ FAQ ============ */
.faq-list{
  display:grid;
  gap:14px;
  max-width:920px;
}
.faq-item{
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:rgba(13,21,38,0.7);
  overflow:hidden;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.faq-item:hover{border-color:rgba(53,225,255,0.35);}
.faq-item[open]{border-color:rgba(53,225,255,0.4);box-shadow:0 0 0 1px rgba(53,225,255,0.14);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:56px;
  padding:12px 20px;
  font-size:16px;
  font-weight:500;
  color:var(--t1);
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  font-family:var(--font-num);
  font-size:20px;
  color:var(--cyan);
  line-height:1;
  transition:transform 220ms var(--ease);
  flex-shrink:0;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-body{
  background:var(--bg-3);
  border-left:2px solid var(--cyan);
  padding:16px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--t2);
}

/* ============ CTA BAND ============ */
.cta-band{
  position:relative;
  padding:64px 0;
  overflow:hidden;
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(11,19,34,0.94),rgba(7,11,20,0.6));
}
.cta-band::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:2px;
  background:linear-gradient(90deg,rgba(53,225,255,0),var(--cyan) 30%,var(--amber) 70%,rgba(255,176,32,0));
  opacity:.7;
}
.cta-inner{
  max-width:640px;
  margin:0 auto;
  text-align:center;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px;}
.cta-inner p{font-size:15px;color:var(--t3);margin-bottom:26px;}
.cta-actions{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
}
.cta-note{font-size:13px;color:var(--t4);}

/* ============ FOOTER ============ */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--line-soft);
  padding:64px 0 0;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:5fr 3fr 4fr 4fr;
  gap:32px;
  padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{
  font-size:14px;
  color:var(--t3);
  line-height:1.8;
  max-width:320px;
}
.footer-col h4{
  font-size:15px;
  color:var(--t1);
  margin-bottom:16px;
}
.footer-col a,.footer-col li{
  display:block;
  font-size:14px;
  color:var(--t3);
  padding:5px 0;
  transition:color 180ms var(--ease),transform 180ms var(--ease);
}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  border-top:1px solid var(--line-soft);
  padding:20px 0 26px;
  font-size:13px;
  color:var(--t4);
}

/* ============ MOBILE STICKY CTA ============ */
.mobile-cta{display:none;}

/* ============ RESPONSIVE ============ */
@media (max-width:1279px){
  .container{max-width:1080px;}
  .hero-visual img{height:320px;}
}

@media (max-width:1023px){
  .section{padding:64px 0;}
  .hero-grid{grid-template-columns:1fr;gap:32px;padding-bottom:44px;}
  .hero-visual{order:2;}
  .hero-visual img{height:260px;}
  .hero-sub{max-width:none;}
  .reward-layout{grid-template-columns:1fr;}
  .side-panel{position:static;}
  .status-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
}

@media (max-width:900px){
  .main-nav{
    position:fixed;
    inset:68px 0 0 0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:24px 24px 96px;
    background:rgba(7,11,20,0.97);
    backdrop-filter:blur(14px);
    transform:translateX(100%);
    transition:transform 260ms var(--ease);
    overflow-y:auto;
    z-index:75;
  }
  body.nav-open .main-nav{transform:translateX(0);}
  .nav-link{
    font-size:17px;
    padding:0;
    min-height:56px;
    display:flex;
    align-items:center;
    border-bottom:1px solid var(--line-soft);
    color:var(--t2);
  }
  .nav-link::after{display:none;}
  .nav-link.active{color:var(--cyan);}
  .nav-toggle{display:grid;place-items:center;}
  .nav-toggle i{pointer-events:none;}
  .header-cta{display:none;}
  body.nav-open .main-nav::after{
    content:"";
    position:fixed;
    left:24px;right:24px;
    bottom:24px;
    height:48px;
    border-radius:999px;
    background:var(--cyan);
    box-shadow:var(--glow-cyan);
    z-index:76;
  }
}

@media (max-width:767px){
  .section{padding:48px 0;}
  .container{padding:0 16px;}
  .hero{padding-top:32px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .reward-grid{grid-template-columns:1fr;gap:18px;}
  .reward-grid > .reward-card:nth-child(even){transform:none;}
  .reward-grid > .reward-card:nth-child(even):hover{transform:translateY(-3px);}
  .stages{grid-template-columns:1fr;gap:22px;}
  .track-line{display:none;}
  .stage{padding-left:22px;border-left:2px solid var(--line-soft);}
  .stage.is-done{border-left-color:rgba(61,232,160,0.6);}
  .stage.is-active{border-left-color:rgba(53,225,255,0.6);}
  .stage-node{position:absolute;left:-7px;top:4px;margin:0;}
  .stage-meta{margin-top:2px;}
  .status-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-band{padding:48px 0;}
  .btn-lg{width:100%;}
  .hero-cta .btn{width:100%;}
  body{padding-bottom:60px;}
  .mobile-cta{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    height:60px;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:0 16px;
    background:rgba(5,8,15,0.94);
    border-top:1px solid rgba(53,225,255,0.28);
    backdrop-filter:blur(10px);
    z-index:70;
  }
  .mobile-cta span{font-size:13px;color:var(--t3);}
  .mobile-cta .btn{padding:9px 18px;font-size:14px;border-radius:999px;}
}

@media (max-width:480px){
  .hero h1{font-size:28px;}
  .brand-sub{letter-spacing:.16em;}
  .stat-chip{padding:6px 10px;font-size:12px;}
  .stat-chip strong{font-size:16px;}
  .faq-item summary{font-size:15px;padding:12px 16px;}
  .faq-body{padding:14px 16px;font-size:14px;}
  .reward-body{padding:6px 14px 18px;}
  .side-panel{padding:22px 16px 20px;}
  .hero-visual img{height:200px;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .hero-energy::after{transform:none;}
}

/* roulang page: category4 */
:root{
  --bg:#070B14;
  --bg-2:#0B1322;
  --bg-3:#0E1729;
  --card:rgba(18,28,48,.72);
  --line:rgba(90,140,200,.18);
  --line-soft:rgba(90,140,200,.14);
  --cyan:#35E1FF;
  --cyan-h:#6BECFF;
  --cyan-a:#1FB8D6;
  --amber:#FFB020;
  --magenta:#FF4D8D;
  --ok:#3DE8A0;
  --warn:#FFC53D;
  --danger:#FF5C6C;
  --t1:#F2F7FF;
  --t2:#C7D3E6;
  --t3:#8A9BB4;
  --t4:#6F819A;
  --r-card:14px;
  --r-btn:10px;
  --r-badge:6px;
  --r-input:10px;
  --shadow:0 8px 24px rgba(0,0,0,.45);
  --container:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(56,225,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(56,225,255,.035) 1px,transparent 1px),
    radial-gradient(900px 520px at 12% -8%,rgba(53,225,255,.10),transparent 62%),
    radial-gradient(760px 460px at 92% 4%,rgba(255,176,32,.07),transparent 60%);
  background-size:24px 24px,24px 24px,auto,auto;
  color:var(--t2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--cyan);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--cyan-h);}
button,input,textarea,select{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--t1);font-weight:700;letter-spacing:.01em;}
p{margin:0;}
::selection{background:rgba(53,225,255,.28);color:#fff;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container{max-width:1280px;}}
@media (max-width:767px){.container{padding:0 16px;}}

.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.02em;}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,11,20,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,rgba(53,225,255,.75),rgba(53,225,255,0) 46%,rgba(255,176,32,.7));
  opacity:.5;
}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--t1);flex:0 0 auto;}
.brand:hover{color:var(--t1);}
.brand-mark{
  width:28px;height:28px;flex:0 0 28px;display:grid;place-items:center;
  border-radius:8px;
  background:linear-gradient(145deg,rgba(53,225,255,.22),rgba(255,176,32,.18));
  border:1px solid rgba(53,225,255,.42);
  color:var(--cyan);font-size:13px;
  box-shadow:0 0 16px rgba(53,225,255,.25);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-main{font-size:16px;font-weight:700;letter-spacing:.04em;}
.brand-sub{font-size:11px;color:var(--t3);letter-spacing:.22em;}

.main-nav{display:flex;align-items:center;gap:6px;margin-left:12px;flex:1 1 auto;}
.nav-link{
  position:relative;padding:8px 12px;border-radius:8px;
  font-size:15px;color:var(--t3);
}
.nav-link:hover{color:var(--t1);background:rgba(53,225,255,.06);}
.nav-link.active{color:var(--cyan);text-shadow:0 0 12px rgba(53,225,255,.45);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(53,225,255,.8);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-btn);
  padding:12px 22px;font-size:15px;font-weight:500;line-height:1;
  cursor:pointer;text-align:center;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{
  background:linear-gradient(180deg,#48e6ff,#1fbfdd);
  color:#04121a;font-weight:700;
  box-shadow:0 0 0 1px rgba(53,225,255,.5),0 0 24px rgba(53,225,255,.32);
}
.btn-primary:hover{color:#04121a;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(53,225,255,.55),0 0 34px rgba(53,225,255,.45);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(53,225,255,.45),0 0 14px rgba(53,225,255,.28);}
.btn-outline{
  background:rgba(53,225,255,.04);border-color:rgba(53,225,255,.5);color:var(--cyan);
}
.btn-outline:hover{background:rgba(53,225,255,.12);color:var(--cyan-h);transform:translateY(-2px);}
.btn-outline:active{transform:translateY(1px);}
.btn-amber{
  background:linear-gradient(180deg,#ffc555,#f09b0c);
  color:#1b1000;font-weight:700;
  box-shadow:0 0 0 1px rgba(255,176,32,.5),0 0 24px rgba(255,176,32,.3);
}
.btn-amber:hover{color:#1b1000;filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,176,32,.55),0 0 34px rgba(255,176,32,.42);}
.btn-amber:active{transform:translateY(1px);}
.btn-pill{border-radius:999px;}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--cyan);font-size:15px;font-weight:500;background:none;border:0;padding:6px 0;cursor:pointer;
}
.btn-link i{transition:transform .18s var(--ease);}
.btn-link:hover i{transform:translateX(3px);}
.btn[disabled],.btn.is-disabled{opacity:.4;box-shadow:none;cursor:not-allowed;transform:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;border-radius:var(--r-badge);
  font-size:14px;font-weight:500;line-height:1.2;
  border:1px solid rgba(53,225,255,.42);
  background:rgba(53,225,255,.1);
  color:var(--cyan);
}
.badge-amber{border-color:rgba(255,176,32,.45);background:rgba(255,176,32,.12);color:var(--amber);}
.badge-magenta{border-color:rgba(255,77,141,.42);background:rgba(255,77,141,.1);color:var(--magenta);}
.badge-ok{border-color:rgba(61,232,160,.42);background:rgba(61,232,160,.1);color:var(--ok);}
.badge-muted{border-color:var(--line);background:rgba(90,140,200,.08);color:var(--t3);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-badge);
  border:1px solid rgba(53,225,255,.38);
  background:rgba(53,225,255,.08);
  color:var(--cyan);font-size:13px;letter-spacing:.1em;
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);
}
.breadcrumb a{color:var(--t3);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb .sep{color:var(--t4);}
.breadcrumb .current{color:var(--cyan);}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line-soft);
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.28;
}
.page-hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.72) 0%,rgba(7,11,20,.88) 58%,rgba(7,11,20,.97) 100%);
}
.page-hero-inner{position:relative;padding:34px 0 46px;}
.page-hero h1{
  font-size:clamp(30px,4.4vw,46px);
  line-height:1.25;
  margin:16px 0 14px;
  max-width:820px;
}
.page-hero .lead{max-width:740px;color:var(--t2);font-size:16px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;
}
.fact{
  min-width:150px;padding:14px 18px;border-radius:var(--r-card);
  background:var(--card);border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.fact .fact-num{
  font-size:26px;font-weight:700;color:var(--cyan);line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.fact .fact-num .unit{font-size:14px;color:var(--t3);margin-left:2px;font-weight:500;}
.fact .fact-label{font-size:13px;color:var(--t3);margin-top:4px;}

/* ---------- 能量条 ---------- */
.energy-track{
  position:relative;height:8px;border-radius:999px;
  background:rgba(90,140,200,.16);overflow:visible;margin-top:30px;
}
.energy-fill{
  position:absolute;left:0;top:0;bottom:0;width:62%;border-radius:999px;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
}
.energy-node{
  position:absolute;top:50%;width:12px;height:12px;border-radius:50%;
  transform:translate(-50%,-50%);
  background:#0b1322;border:2px solid rgba(90,140,200,.45);
}
.energy-node.done{border-color:var(--cyan);background:var(--cyan);}
.energy-node.current{
  border-color:var(--cyan);background:var(--cyan);
  box-shadow:0 0 0 4px rgba(53,225,255,.18),0 0 18px rgba(53,225,255,.7);
  animation:breathe 1.8s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:.7;}50%{opacity:1;}}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section-tight{padding:56px 0;}
@media (max-width:1023px){.section{padding:64px 0;}.section-tight{padding:44px 0;}}
@media (max-width:767px){.section{padding:48px 0;}.section-tight{padding:36px 0;}}
.section-head{margin-bottom:32px;}
.section-head h2{font-size:clamp(24px,3vw,32px);line-height:1.35;}
.section-head .sub{margin-top:10px;color:var(--t3);font-size:15px;max-width:680px;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}

.divider{height:1px;background:var(--line-soft);border:0;margin:0;}

/* ---------- 问题锚点 + FAQ 两栏 ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  gap:32px;
  align-items:start;
}
.faq-aside{
  position:sticky;top:88px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--card);
  box-shadow:var(--shadow);
  padding:18px 16px;
}
.faq-aside h3{
  font-size:13px;letter-spacing:.12em;color:var(--t3);font-weight:500;
  margin-bottom:12px;text-transform:uppercase;
}
.faq-aside a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:10px 12px;border-radius:10px;
  color:var(--t2);font-size:14px;
  border-left:2px solid transparent;
}
.faq-aside a:hover{background:rgba(53,225,255,.08);color:var(--t1);border-left-color:rgba(53,225,255,.55);}
.faq-aside a .cnt{font-size:12px;color:var(--t4);font-variant-numeric:tabular-nums;}

.faq-group{
  border-top:1px solid var(--line-soft);
  padding-top:30px;
  margin-top:30px;
  scroll-margin-top:92px;
}
.faq-group:first-child{border-top:0;padding-top:0;margin-top:0;}
.faq-group h2{
  font-size:22px;line-height:1.5;display:flex;align-items:center;gap:10px;
}
.faq-group h2 .dot{
  width:8px;height:8px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 12px rgba(53,225,255,.7);flex:0 0 8px;
}
.faq-group .group-sub{color:var(--t3);font-size:14px;margin:8px 0 18px;}

.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--card);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.faq-item:hover{border-color:rgba(53,225,255,.4);}
.faq-item[open]{border-color:rgba(53,225,255,.42);}
.faq-item summary{
  list-style:none;cursor:pointer;
  min-height:56px;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;color:var(--t1);font-weight:500;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;display:grid;place-items:center;
  color:var(--cyan);font-size:14px;
  transition:transform .22s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-body{
  background:var(--bg-3);
  border-left:2px solid var(--cyan);
  padding:16px 20px;
  font-size:15px;line-height:1.8;color:var(--t2);
}
.faq-body ul{margin-top:10px;}
.faq-body li{position:relative;padding-left:16px;margin-bottom:6px;}
.faq-body li::before{
  content:"";position:absolute;left:0;top:11px;
  width:5px;height:5px;border-radius:1px;background:var(--cyan);
}
.faq-body .hint{color:var(--t3);font-size:14px;margin-top:10px;}

/* ---------- 联系表单条 ---------- */
.contact-band{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:linear-gradient(150deg,rgba(18,28,48,.9),rgba(11,19,34,.86));
  box-shadow:var(--shadow);
  padding:34px;
}
.contact-grid{display:grid;grid-template-columns:4fr 8fr;gap:32px;align-items:start;}
@media (max-width:1023px){.contact-grid{grid-template-columns:1fr;gap:22px;}}
.contact-grid h2{font-size:24px;line-height:1.4;}
.contact-grid .desc{color:var(--t3);font-size:15px;margin-top:12px;}
.contact-points{margin-top:18px;display:grid;gap:10px;}
.contact-points li{display:flex;gap:10px;font-size:14px;color:var(--t2);}
.contact-points i{color:var(--cyan);margin-top:5px;font-size:13px;}

.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:14px;color:var(--t3);}
.field input,.field textarea{
  width:100%;
  background:var(--bg-2);
  border:1px solid rgba(90,140,200,.25);
  border-radius:var(--r-input);
  padding:12px 14px;font-size:15px;color:var(--t1);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{min-height:120px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--t4);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(53,225,255,.18);
}
.field.has-error input,.field.has-error textarea{border-color:var(--danger);}
.field .err{font-size:13px;color:var(--danger);display:none;}
.field.has-error .err{display:block;}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:4px;}
.form-note{font-size:13px;color:var(--t4);}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(11,19,34,.9),rgba(7,11,20,.95));
}
.cta-band .energy-line{
  position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(53,225,255,.85),rgba(255,176,32,.8),transparent);
  animation:slide 5.2s linear infinite;
  background-size:220% 100%;
}
@keyframes slide{0%{background-position:0 0;}100%{background-position:220% 0;}}
.cta-inner{
  position:relative;
  padding:52px 0;
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,28px);line-height:1.4;}
.cta-inner p{color:var(--t3);font-size:15px;margin-top:10px;max-width:560px;}
.cta-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#05080F;
  border-top:1px solid var(--line-soft);
  padding:56px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:32px;
  padding-bottom:40px;
}
.footer-brand p{color:var(--t3);font-size:14px;margin-top:14px;max-width:320px;line-height:1.8;}
.footer-col h4{font-size:15px;color:var(--t1);margin-bottom:14px;font-weight:700;}
.footer-col a{
  display:block;font-size:14px;color:var(--t3);padding:5px 0;
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px);}
.footer-col ul li{font-size:14px;color:var(--t3);padding:5px 0;}
.footer-bottom{
  border-top:1px solid var(--line-soft);
  padding:18px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--t4);
}

/* ---------- 移动导航 ---------- */
.nav-toggle{
  display:none;width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;
  background:rgba(53,225,255,.05);color:var(--t1);cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:rgba(53,225,255,.45);color:var(--cyan);}
.nav-toggle:active{transform:translateY(1px);}

@media (max-width:1023px){
  .faq-layout{grid-template-columns:1fr;gap:22px;}
  .faq-aside{
    position:static;
    display:flex;gap:10px;overflow-x:auto;
    padding:12px;
    scrollbar-width:none;
  }
  .faq-aside::-webkit-scrollbar{display:none;}
  .faq-aside h3{display:none;}
  .faq-aside a{
    flex:0 0 auto;white-space:nowrap;
    border-left:0;border:1px solid var(--line);
    border-radius:999px;padding:8px 14px;
  }
  .faq-aside a:hover{border-color:rgba(53,225,255,.5);}
  .faq-aside a .cnt{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:767px){
  .header-inner{height:60px;gap:12px;}
  .main-nav{
    position:fixed;inset:60px 0 0 0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(7,11,20,.98);
    backdrop-filter:blur(14px);
    padding:12px 16px 90px;
    margin:0;
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease);
    overflow-y:auto;
    z-index:55;
  }
  .main-nav.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .nav-link{
    font-size:17px;line-height:56px;padding:0 6px;
    border-bottom:1px solid var(--line-soft);border-radius:0;
  }
  .nav-link.active::after{display:none;}
  .nav-link.active{border-bottom-color:rgba(53,225,255,.4);}
  .nav-toggle{display:inline-flex;}
  .header-cta{display:none;}
  .page-hero-inner{padding:24px 0 34px;}
  .hero-facts{gap:10px;}
  .fact{flex:1 1 140px;min-width:0;padding:12px 14px;}
  .form-grid{grid-template-columns:1fr;}
  .contact-band{padding:22px;}
  .cta-inner{padding:40px 0;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (max-width:520px){
  .page-hero h1{font-size:26px;}
  .faq-item summary{font-size:15px;padding:0 16px;}
  .faq-group h2{font-size:19px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}