/* roulang page: index */
/* ===== reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img{max-width:100%;display:block;height:auto}
a{text-decoration:none;color:inherit}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
input,textarea,select{font:inherit;color:inherit}
table{border-collapse:collapse;width:100%}
[hidden]{display:none!important}
summary{list-style:none;cursor:pointer}
summary::-webkit-details-marker{display:none}

/* ===== tokens ===== */
:root{
  --bg:#0A1218;
  --panel:#0F1A22;
  --panel-2:#132029;
  --steel:#F4F6F7;
  --steel-text:#10202B;
  --steel-border:#D6DEE3;
  --accent:#F26522;
  --accent-hover:#FF7F3F;
  --accent-soft:#FFB58C;
  --cyan:#4EC5DC;
  --text:#E9EFF3;
  --text-2:#A9B7C1;
  --text-3:#6E808C;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --radius-card:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-dark:0 18px 40px rgba(0,0,0,.45);
  --shadow-light:0 12px 28px rgba(16,32,43,.08);
  --container:1240px;
  --dur:240ms;
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ===== base ===== */
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:32px 32px;
  pointer-events:none;z-index:0;
}
h1,h2,h3,h4{font-weight:700;line-height:1.3;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.6vw,56px);font-weight:800;line-height:1.18}
h2{font-size:clamp(24px,2.6vw,36px);font-weight:700;line-height:1.3}
h3{font-size:19px;font-weight:700;line-height:1.45}
p{color:var(--text-2);font-size:15.5px;line-height:1.85}
strong{font-weight:700;color:var(--text)}
a{transition:color var(--dur) ease,border-color var(--dur) ease,background-color var(--dur) ease}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px;
}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ===== layout ===== */
.kv-container{
  width:100%;max-width:var(--container);margin:0 auto;
  padding-left:48px;padding-right:48px;position:relative;z-index:2;
}
.section{padding:110px 0;position:relative}
.section-light{background:var(--steel);color:var(--steel-text)}
.section-light p,.section-light li{color:#41535f}
.section-light h2,.section-light h3,.section-light strong{color:var(--steel-text)}
.section-tight{padding:84px 0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  margin-bottom:48px;flex-wrap:wrap;
}
.eyebrow{
  font-size:11px;letter-spacing:.18em;color:var(--cyan);
  text-transform:uppercase;font-weight:600;margin-bottom:12px;
}
.section-light .eyebrow{color:#B9500F}
.divider{height:1px;background:var(--line);border:0}

/* ===== buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:transform var(--dur) ease,box-shadow var(--dur) ease,background-color var(--dur) ease,border-color var(--dur) ease,color var(--dur) ease;
  white-space:nowrap;cursor:pointer;border:1px solid transparent;
}
.btn-primary{
  background:linear-gradient(180deg,#F26522,#FF8A3D);
  color:#181008;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 26px rgba(242,101,34,.35);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 12px 30px rgba(242,101,34,.45);filter:brightness(1.06);color:#181008}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 1px 0 rgba(255,255,255,.3),0 6px 16px rgba(242,101,34,.25)}
.btn-ghost{
  background:transparent;border-color:var(--line-2);color:var(--text);
}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(78,197,220,.5);color:var(--text)}
.btn-ghost:active{background:rgba(255,255,255,.03)}
.section-light .btn-ghost{border-color:#C3CED5;color:var(--steel-text)}
.section-light .btn-ghost:hover{background:#E6ECEF;border-color:#9BB0BB}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}

/* ===== badges / tags ===== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--radius-pill);
  font-size:11.5px;font-weight:600;letter-spacing:.04em;
  border:1px solid var(--line-2);color:var(--text-2);
}
.badge-cyan{border-color:rgba(78,197,220,.45);color:var(--cyan);background:rgba(78,197,220,.08)}
.badge-accent{border-color:rgba(242,101,34,.5);color:var(--accent-soft);background:rgba(242,101,34,.08)}
.section-light .badge-cyan{border-color:#8FC9D6;color:#1F6B7C;background:rgba(78,197,220,.12)}

/* ===== header / nav ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;border-bottom:1px solid transparent;
  transition:background-color var(--dur) ease,border-color var(--dur) ease,backdrop-filter var(--dur) ease;
}
.site-header.is-scrolled{
  background:rgba(10,18,24,.82);
  backdrop-filter:blur(14px) saturate(130%);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:76px;transition:height var(--dur) ease;
}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;flex-shrink:0;display:grid;place-items:center;
  border-radius:var(--radius-sm);border:1px solid rgba(78,197,220,.35);
  background:linear-gradient(180deg,rgba(78,197,220,.14),rgba(78,197,220,.03));
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text strong{
  font-size:22px;font-weight:900;letter-spacing:-.02em;color:var(--text);
}
.brand-text em{
  font-style:normal;font-size:11px;letter-spacing:.16em;color:var(--text-3);
}
.main-nav{display:flex;align-items:center;gap:6px;flex:1;justify-content:center}
.main-nav a{
  position:relative;padding:10px 14px;font-size:15px;color:var(--text-2);
  border-radius:8px;font-weight:500;
}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.main-nav a.is-active{color:var(--text);font-weight:600}
.main-nav a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--accent);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-search{
  display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:var(--radius-btn);padding:4px 6px 4px 12px;
  width:200px;transition:width var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.nav-search:focus-within{
  width:280px;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18);
}
.nav-search input{
  border:0;background:transparent;flex:1;min-width:0;padding:7px 0;
  font-size:14px;color:var(--text);
}
.nav-search input::placeholder{color:var(--text-3)}
.nav-search button{
  width:32px;height:32px;border-radius:8px;display:grid;place-items:center;
  color:var(--text-2);
}
.nav-search button:hover{color:var(--cyan);background:rgba(255,255,255,.06)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--line);position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;background:var(--text);
  border-radius:2px;transition:transform var(--dur) ease,opacity var(--dur) ease,top var(--dur) ease;
}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:27px}
.nav-toggle.is-open span:nth-child(1){top:21px;transform:rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){top:21px;transform:rotate(-45deg)}

/* drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,12,17,.7);z-index:70;
  opacity:0;visibility:hidden;transition:opacity var(--dur) ease,visibility var(--dur) ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;left:0;bottom:0;width:84vw;max-width:340px;z-index:80;
  background:rgba(15,26,34,.96);backdrop-filter:blur(16px);
  border-right:1px solid var(--line);
  transform:translateX(-102%);transition:transform var(--dur) ease;
  display:flex;flex-direction:column;padding:20px;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;color:var(--text-2)}
.drawer-search{
  display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.04);
  border:1px solid var(--line);border-radius:var(--radius-btn);padding:4px 6px 4px 12px;margin-bottom:18px;
}
.drawer-search input{border:0;background:transparent;flex:1;padding:10px 0;font-size:14px;min-width:0}
.drawer-nav{display:flex;flex-direction:column;flex:1}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 12px;border-bottom:1px solid var(--line);
  font-size:16px;color:var(--text-2);border-radius:8px;
}
.drawer-nav a:hover,.drawer-nav a:active{background:rgba(255,255,255,.05);color:var(--text)}
.drawer-nav a.is-active{color:var(--accent-soft);font-weight:600}
.drawer-nav a i{font-size:12px;color:var(--text-3)}
.drawer-foot{padding-top:16px;border-top:1px solid var(--line)}

/* ===== hero ===== */
.hero{
  position:relative;overflow:hidden;
  padding:150px 0 96px;
  background:var(--bg);
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.55;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(10,18,24,.96) 0%,rgba(10,18,24,.78) 45%,rgba(10,18,24,.55) 100%),
             radial-gradient(120% 80% at 8% 50%,rgba(10,18,24,.9),transparent 60%);
}
.hero-inner{display:flex;align-items:center;gap:56px}
.hero-copy{flex:1 1 52%;min-width:0}
.hero-label{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:22px;
  padding:6px 14px;border-radius:var(--radius-pill);
  border:1px solid rgba(242,101,34,.4);background:rgba(242,101,34,.08);
  font-size:12.5px;color:var(--accent-soft);font-weight:600;letter-spacing:.06em;
}
.hero-copy h1{margin-bottom:22px;max-width:14em}
.hero-copy h1 .hl{color:var(--accent-soft)}
.hero-sub{
  font-size:17px;line-height:1.8;color:var(--text-2);max-width:34em;margin-bottom:32px;
}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;padding-top:26px;border-top:1px solid var(--line);
}
.metric-num{
  font-size:clamp(24px,2.4vw,32px);font-weight:800;color:var(--text);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.metric-num span{font-size:15px;color:var(--accent-soft);margin-left:2px}
.metric-label{font-size:12.5px;color:var(--text-3);margin-top:4px;letter-spacing:.02em}

.hero-visual{flex:1 1 46%;min-width:0;position:relative}
.glass-card{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid rgba(255,255,255,.09);
  border-radius:var(--radius-card);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.10),var(--shadow-dark);
}
.hero-card{padding:20px;position:relative}
.hero-card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-sm);
}
.hero-card-body{padding:18px 6px 6px}
.hero-card-body h2{font-size:18px;margin-bottom:8px}
.hero-card-body p{font-size:14px;margin-bottom:16px}
.hero-card-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-badge{
  position:absolute;top:-14px;right:22px;padding:8px 16px;border-radius:var(--radius-pill);
  background:linear-gradient(180deg,#F26522,#FF8A3D);color:#181008;
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
  box-shadow:0 10px 24px rgba(242,101,34,.35);
}

/* ===== claim bar ===== */
.claim-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(19,32,41,.55)}
.claim-list{display:flex;align-items:stretch;overflow-x:auto;scrollbar-width:none}
.claim-list::-webkit-scrollbar{display:none}
.claim-item{
  flex:1 0 auto;display:flex;align-items:center;gap:10px;
  padding:22px 28px;border-right:1px solid var(--line);
  font-size:14.5px;color:var(--text-2);white-space:nowrap;
}
.claim-item:last-child{border-right:0}
.claim-item::before{
  content:"";width:6px;height:6px;background:var(--accent);border-radius:1px;flex-shrink:0;
}

/* ===== story ===== */
.story-row{display:flex;align-items:center;gap:56px;padding:40px 0}
.story-row.reverse{flex-direction:row-reverse}
.story-media{flex:1 1 46%;min-width:0}
.story-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-card);box-shadow:var(--shadow-light)}
.story-text{flex:1 1 54%;min-width:0}
.story-index{
  display:inline-grid;place-items:center;width:44px;height:44px;margin-bottom:18px;
  border:1px solid #B7C6CE;border-radius:8px;
  color:#B9500F;font-weight:800;font-size:15px;font-variant-numeric:tabular-nums;
}
.story-text h3{font-size:clamp(21px,1.9vw,26px);margin-bottom:14px}
.story-text p+p{margin-top:12px}
.story-points{margin-top:18px;display:flex;flex-wrap:wrap;gap:10px}
.story-points span{
  font-size:13px;padding:5px 12px;border-radius:var(--radius-pill);
  border:1px solid var(--steel-border);color:#41535f;background:#fff;
}

/* ===== featured cards ===== */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch}
.feature-main{position:relative;display:flex;flex-direction:column}
.feature-main .card-media{overflow:hidden;border-radius:var(--radius-card) var(--radius-card) 0 0}
.feature-main img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease}
.feature-main:hover img{transform:scale(1.03)}
.feature-main .card-body{padding:26px 28px 28px}
.feature-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.card{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.09);
  border-radius:var(--radius-card);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  transition:transform var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
  overflow:hidden;display:flex;flex-direction:column;height:100%;
}
.card:hover{transform:translateY(-3px);border-color:rgba(242,101,34,.45);box-shadow:inset 0 1px 0 rgba(255,255,255,.1),0 22px 44px rgba(0,0,0,.5)}
.card-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.card-body{padding:22px 24px;display:flex;flex-direction:column;flex:1;gap:12px}
.card-body h3{font-size:19px}
.card-body p{font-size:14px;margin:0}
.card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);letter-spacing:.02em;
}
.card-link{color:var(--cyan);font-size:13px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.card-link:hover{color:var(--accent-hover)}
.feature-side .card-media img{aspect-ratio:16/9}

/* ===== news list (CMS) ===== */
.news-grid{margin-top:0}
.news-card{
  display:flex;flex-direction:column;height:100%;padding:24px;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.09);border-radius:var(--radius-card);
  transition:transform var(--dur) ease,border-color var(--dur) ease;
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(78,197,220,.4)}
.news-card-body{display:flex;flex-direction:column;gap:12px;flex:1}
.news-card h3{font-size:18px}
.news-card h3 a{color:var(--text)}
.news-card h3 a:hover{color:var(--accent-soft)}
.news-card p{
  font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card-foot{
  margin-top:20px;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--text-3);
}
.arrow-link{
  width:30px;height:30px;border-radius:8px;display:grid;place-items:center;
  border:1px solid var(--line-2);color:var(--text-2);
}
.arrow-link:hover{color:#181008;background:var(--accent);border-color:var(--accent)}
.empty-state{
  text-align:center;padding:64px 20px;border:1px dashed var(--line-2);border-radius:var(--radius-card);
  display:flex;flex-direction:column;align-items:center;gap:16px;
}
.empty-state svg{width:44px;height:44px;stroke:var(--text-3)}
.empty-state p{font-size:14.5px;color:var(--text-2)}
.pager-slot{min-height:1px;margin-top:32px;display:flex;justify-content:center}

/* ===== trust ===== */
.logo-wall{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:56px;
}
.logo-item{
  height:76px;display:grid;place-items:center;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:rgba(255,255,255,.02);
  color:var(--text-3);font-size:14.5px;letter-spacing:.08em;font-weight:600;
  transition:color var(--dur) ease,border-color var(--dur) ease,background-color var(--dur) ease;
}
.logo-item:hover{color:var(--text);border-color:var(--line-2);background:rgba(255,255,255,.05)}
.data-bar{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  border-top:1px solid var(--line);
}
.data-item{
  padding:28px 24px 8px;border-right:1px solid var(--line);position:relative;
}
.data-item:last-child{border-right:0}
.data-item::before{content:"";position:absolute;top:-1px;left:0;width:56px;height:2px;background:var(--accent)}
.data-item .metric-label{margin-top:8px}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  margin-bottom:14px;overflow:hidden;transition:border-color var(--dur) ease;
}
.faq-item[open]{border-color:rgba(78,197,220,.4)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 22px;font-size:16px;font-weight:600;color:var(--text);
}
.faq-item summary:hover{color:var(--accent-soft)}
.faq-icon{
  flex-shrink:0;width:24px;height:24px;position:relative;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--cyan);border-radius:2px;
  transition:transform var(--dur) ease;
}
.faq-icon::before{top:11px;left:4px;right:4px;height:2px}
.faq-icon::after{left:11px;top:4px;bottom:4px;width:2px}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-body{padding:0 22px 22px;font-size:15px;color:var(--text-2);line-height:1.85;border-top:1px solid var(--line);padding-top:18px}

/* ===== CTA band ===== */
.cta-band{
  position:relative;overflow:hidden;background:var(--panel);
  border-top:2px solid var(--accent);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.22;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(10,18,24,.95),rgba(10,18,24,.7));
}
.cta-inner{position:relative;z-index:2;display:flex;gap:56px;align-items:center;padding:80px 0}
.cta-copy{flex:1 1 58%;min-width:0}
.cta-copy h2{margin-bottom:14px}
.cta-copy p{font-size:15.5px;max-width:34em}
.cta-form{flex:1 1 42%;min-width:0}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;color:var(--text-3);margin-bottom:8px;letter-spacing:.04em}
.field input,.field textarea{
  width:100%;padding:13px 16px;border-radius:var(--radius-btn);
  background:rgba(255,255,255,.04);border:1px solid var(--line-2);color:var(--text);
  transition:border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18);
}
.form-note{font-size:12.5px;color:var(--text-3);margin-top:12px}

/* ===== footer ===== */
.site-footer{background:#070E13;border-top:1px solid rgba(242,101,34,.45);position:relative;z-index:2}
.footer-main{padding:72px 0 48px;display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{font-size:14px;color:var(--text-3);max-width:26em;margin-bottom:20px}
.footer-contact{font-size:13.5px;color:var(--text-2);line-height:2}
.footer-contact i{color:var(--cyan);width:18px;margin-right:8px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-2);
}
.footer-social a:hover{color:#181008;background:var(--accent);border-color:var(--accent)}
.footer-col h4{font-size:14px;letter-spacing:.08em;color:var(--text);margin-bottom:20px;font-weight:700}
.footer-col ul li{margin-bottom:12px}
.footer-col ul a{font-size:14px;color:var(--text-3)}
.footer-col ul a:hover{color:var(--accent-soft)}
.footer-sub p{font-size:13.5px;color:var(--text-3);margin-bottom:16px}
.footer-sub .field{margin-bottom:10px}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:12.5px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--text-2)}

/* ===== to top ===== */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:50;
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:rgba(19,32,41,.9);border:1px solid var(--line-2);color:var(--text-2);
  backdrop-filter:blur(10px);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--dur) ease,transform var(--dur) ease,visibility var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--accent-soft);border-color:rgba(242,101,34,.5)}

/* ===== responsive ===== */
@media (max-width:1279px){
  .kv-container{padding-left:32px;padding-right:32px}
  .hero-inner{gap:40px}
}
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-toggle{display:block}
  .section{padding:76px 0}
  .section-tight{padding:64px 0}
  .hero{padding:130px 0 72px}
  .hero-inner{flex-direction:column;gap:40px}
  .hero-copy,.hero-visual{flex:1 1 auto;width:100%}
  .hero-card img{aspect-ratio:16/9}
  .feature-grid{grid-template-columns:1fr}
  .feature-side{grid-template-rows:auto;grid-template-columns:1fr 1fr}
  .theme-a .feature-side{grid-template-columns:1fr 1fr}
  .footer-main{grid-template-columns:1fr 1fr;gap:36px}
  .data-bar{grid-template-columns:1fr 1fr;border-top:0}
  .data-item{border-right:0;border-top:1px solid var(--line);padding-top:24px}
  .data-item:nth-child(odd)::before{left:0}
  .logo-wall{grid-template-columns:repeat(3,minmax(0,1fr))}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:32px;padding:64px 0}
  .story-row,.story-row.reverse{flex-direction:column;gap:28px;padding:28px 0}
}
@media (max-width:767px){
  body{font-size:15px}
  .kv-container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px;gap:16px}
  .hero{padding:112px 0 56px}
  .hero-copy h1{font-size:clamp(27px,7.4vw,36px)}
  .hero-sub{font-size:15.5px}
  .hero-metrics{grid-template-columns:1fr 1fr;gap:16px}
  .hero-cta .btn{flex:1 1 100%}
  .claim-item{padding:18px 20px;font-size:13.5px}
  .feature-side{grid-template-columns:1fr}
  .logo-wall{grid-template-columns:1fr 1fr}
  .data-bar{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr;padding:52px 0 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .faq-item summary{font-size:15px;padding:18px}
  .btn{padding:12px 20px}
  .to-top{right:16px;bottom:16px}
}
@media (min-width:1440px){
  :root{--container:1280px}
  .hero-card{margin-right:-32px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}

/* roulang page: article */
/* ================= reset ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;border-spacing:0}

/* ================= tokens ================= */
:root{
  --bg:#0A1218;
  --panel:#0F1A22;
  --panel-2:#132029;
  --steel:#F4F6F7;
  --steel-text:#10202B;
  --steel-border:#D6DEE3;
  --accent:#F26522;
  --accent-hover:#FF7F3F;
  --accent-soft:#FFB58C;
  --cyan:#4EC5DC;
  --text:#E9EFF3;
  --text-2:#A9B7C1;
  --text-3:#6E808C;
  --border:rgba(255,255,255,.08);
  --border-strong:rgba(255,255,255,.14);
  --radius-card:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-lg:0 18px 40px rgba(0,0,0,.45);
  --shadow-sm:0 12px 28px rgba(0,0,0,.3);
  --shadow-light:0 12px 28px rgba(16,32,43,.08);
  --container:1240px;
  --ease:240ms cubic-bezier(.2,.7,.3,1);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:Inter,"SFMono-Regular",ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
}

/* ================= layout ================= */
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  padding-top:76px;
  overflow-x:hidden;
}
.kv-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:640px){.kv-container{padding:0 32px}}
@media (min-width:1024px){.kv-container{padding:0 48px}}
@media (min-width:1440px){.kv-container{max-width:1280px}}

.skip-link{position:absolute;left:-9999px;top:0;z-index:999;background:var(--accent);color:#0A1218;padding:10px 18px;border-radius:0 0 10px 0;font-weight:700}
.skip-link:focus{left:0}

/* ================= nav ================= */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,18,24,.88);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:var(--border);
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.header-inner{display:flex;align-items:center;gap:18px;height:76px;transition:height var(--ease)}
.site-header.is-scrolled .header-inner{height:64px}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:34px;height:34px;flex:0 0 auto}
.brand-mark svg{width:100%;height:100%}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-text strong{font-size:20px;font-weight:900;letter-spacing:-.02em;color:#fff}
.brand-text em{font-style:normal;font-size:11px;letter-spacing:.16em;color:var(--text-3);margin-top:4px}

.main-nav{display:none;align-items:center;gap:2px;margin-left:14px}
@media (min-width:1024px){.main-nav{display:flex}}
.main-nav a{
  position:relative;display:inline-block;padding:10px 14px;border-radius:8px;
  font-size:14.5px;font-weight:500;color:var(--text-2);
  transition:color var(--ease),background var(--ease);
}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.main-nav a.is-active{color:#fff}
.main-nav a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--accent);border-radius:2px;
}
.main-nav a:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:none;align-items:center;gap:8px;width:200px;height:38px;padding:0 12px;
  border:1px solid var(--border);border-radius:var(--radius-btn);
  background:rgba(255,255,255,.04);
  transition:width var(--ease),border-color var(--ease),box-shadow var(--ease);
}
@media (min-width:1024px){.nav-search{display:flex}}
.nav-search:focus-within{width:280px;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18)}
.nav-search i{font-size:13px;color:var(--text-3)}
.nav-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:13.5px}
.nav-search input::placeholder{color:var(--text-3)}
.nav-ghost{
  display:none;font-size:13.5px;color:var(--text-2);padding:8px 4px;
  border-bottom:1px solid transparent;transition:color var(--ease),border-color var(--ease);
}
@media (min-width:1140px){.nav-ghost{display:inline-block}}
.nav-ghost:hover{color:var(--text);border-bottom-color:var(--cyan)}

.nav-toggle{
  display:grid;place-content:center;gap:5px;width:44px;height:44px;
  background:rgba(255,255,255,.05);border:1px solid var(--border);
  border-radius:var(--radius-btn);cursor:pointer;
}
@media (min-width:1024px){.nav-toggle{display:none}}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform var(--ease),opacity var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-toggle:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

.nav-mask{position:fixed;inset:0;background:rgba(6,12,17,.7);z-index:130;opacity:0;pointer-events:none;transition:opacity var(--ease)}
.nav-mask.is-open{opacity:1;pointer-events:auto}
.nav-drawer{
  position:fixed;top:0;left:0;bottom:0;width:84vw;max-width:340px;z-index:140;
  display:flex;flex-direction:column;
  background:rgba(15,26,34,.96);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--border-strong);
  transform:translateX(-104%);
  transition:transform var(--ease);
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{padding:22px 20px 12px}
.drawer-search{display:flex;width:100%}
.drawer-search:focus-within{width:100%}
.drawer-nav{padding:8px 12px;overflow-y:auto;flex:1}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 12px;border-radius:10px;
  font-size:15.5px;color:var(--text-2);
  transition:background var(--ease),color var(--ease);
}
.drawer-nav a:hover,.drawer-nav a:focus-visible{background:rgba(255,255,255,.06);color:#fff}
.drawer-nav a i{font-size:12px;color:var(--text-3)}
.drawer-foot{padding:16px 20px 24px;border-top:1px solid var(--border)}
.drawer-foot .btn{width:100%}

/* ================= buttons ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border:1px solid transparent;
  border-radius:var(--radius-btn);cursor:pointer;
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
}
.btn:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.btn-primary{
  background:linear-gradient(180deg,#F26522,#FF8A3D);
  color:#141414;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 26px rgba(242,101,34,.35);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 14px 32px rgba(242,101,34,.45);filter:brightness(1.06)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 1px 0 rgba(255,255,255,.3),0 6px 16px rgba(242,101,34,.25)}
.btn-ghost{background:transparent;border-color:var(--border-strong);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.26)}
.btn-ghost:active{background:rgba(255,255,255,.1)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ================= badges & tags ================= */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--radius-pill);
  font-size:11.5px;font-weight:600;letter-spacing:.04em;line-height:1.6;
}
.badge-cyan{border:1px solid rgba(78,197,220,.5);color:var(--cyan);background:rgba(78,197,220,.08)}
.badge-accent{border:1px solid rgba(242,101,34,.5);color:var(--accent-soft);background:rgba(242,101,34,.1)}
.tag{
  display:inline-block;padding:5px 14px;border-radius:var(--radius-pill);
  border:1px solid var(--border-strong);font-size:13px;color:var(--text-2);
  transition:border-color var(--ease),color var(--ease),background var(--ease);
}
.tag:hover{border-color:rgba(78,197,220,.6);color:var(--cyan);background:rgba(78,197,220,.06)}

/* ================= page hero ================= */
.page-hero{
  position:relative;overflow:hidden;
  padding:96px 0 56px;
  background:#0A1218 url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,18,24,.94) 0%,rgba(10,18,24,.82) 45%,#0A1218 100%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:32px 32px;
}
.page-hero .kv-container{position:relative;z-index:2}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.breadcrumb a{color:var(--text-2);transition:color var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{color:var(--text-3);opacity:.7}
.breadcrumb .current{color:var(--cyan);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.hero-head{max-width:900px}
.hero-head h1{
  margin:18px 0 0;
  font-size:clamp(28px,4.2vw,44px);
  font-weight:800;line-height:1.25;letter-spacing:-.01em;color:#fff;
  max-width:820px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px;font-size:13px;color:var(--text-3)}
.meta-row span{display:inline-flex;align-items:center;gap:6px}
.meta-row i{color:var(--text-3);font-size:12px}
.meta-row .divider{width:1px;height:14px;background:var(--border-strong);padding:0;display:block}

/* ================= article section ================= */
.article-section{padding:56px 0 88px;position:relative}
@media (min-width:1024px){.article-section{padding:64px 0 104px}}
.article-grid{margin-bottom:0}

.article-panel{
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-lg),inset 0 1px 0 rgba(255,255,255,.08);
  padding:28px 22px;
}
@media (min-width:768px){.article-panel{padding:40px 40px 44px}}

.article-body{font-size:16.5px;line-height:1.9;color:#DCE5EB;max-width:720px}
.article-body > *:first-child{margin-top:0}
.article-body > p:first-of-type{
  font-size:17px;color:var(--text);
  border-left:3px solid var(--accent);
  padding-left:18px;
}
.article-body h2{
  position:relative;
  margin:46px 0 18px;padding-left:16px;
  font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.45;color:#fff;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.42em;bottom:.42em;width:4px;border-radius:2px;background:var(--accent);
}
.article-body h3{margin:32px 0 12px;font-size:18.5px;font-weight:700;line-height:1.5;color:var(--cyan)}
.article-body h4{margin:24px 0 10px;font-size:16.5px;font-weight:700;color:#fff}
.article-body p{margin:0 0 20px}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:22px}
.article-body ul li{position:relative;margin-bottom:.6em;color:var(--text-2)}
.article-body ul li::before{
  content:"";position:absolute;left:-15px;top:.75em;width:6px;height:6px;border-radius:2px;background:var(--accent);
}
.article-body ol{list-style:decimal}
.article-body ol li{margin-bottom:.6em;color:var(--text-2)}
.article-body strong{color:#fff;font-weight:700}
.article-body a{color:var(--cyan);border-bottom:1px solid rgba(78,197,220,.4);transition:color var(--ease),border-color var(--ease)}
.article-body a:hover{color:#87E1F0;border-bottom-color:#87E1F0}
.article-body img{margin:24px 0;border-radius:12px;border:1px solid var(--border)}
.article-body figure{margin:24px 0}
.article-body figcaption{margin-top:10px;font-size:13px;color:var(--text-3);text-align:center}
.article-body blockquote{
  margin:26px 0;padding:16px 22px;
  background:rgba(255,255,255,.04);
  border-left:3px solid var(--cyan);
  border-radius:0 12px 12px 0;
  color:var(--text-2);
}
.article-body hr{margin:36px 0;border:0;height:1px;background:var(--border)}
.article-body code{
  font-family:var(--mono);font-size:.92em;padding:2px 6px;border-radius:6px;
  background:rgba(255,255,255,.08);color:var(--accent-soft);
}
.article-body pre{
  margin:24px 0;padding:20px;overflow-x:auto;
  background:var(--panel);border:1px solid var(--border);
  border-radius:12px;color:#CFDCE4;font-family:var(--mono);font-size:14.5px;line-height:1.75;
}
.article-body table{width:100%;margin:24px 0;font-size:14.5px}
.article-body th,.article-body td{padding:12px 14px;border:1px solid var(--border);text-align:left}
.article-body th{background:var(--panel-2);color:#fff;font-weight:700;white-space:nowrap}
.article-body td{color:var(--text-2)}

.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:44px;padding-top:28px;border-top:1px solid var(--border)}
.tags-label{font-size:13px;color:var(--text-3);letter-spacing:.06em;margin-right:4px}

.post-nav{display:grid;gap:14px;margin-top:28px}
@media (min-width:640px){.post-nav{grid-template-columns:1fr 1fr}}
.post-nav a{
  display:flex;flex-direction:column;gap:6px;padding:18px 20px;
  background:rgba(255,255,255,.035);border:1px solid var(--border);
  border-radius:var(--radius-sm);
  transition:border-color var(--ease),background var(--ease),transform var(--ease);
}
.post-nav a:hover{border-color:rgba(242,101,34,.45);background:rgba(255,255,255,.06);transform:translateY(-3px)}
.post-nav .pn-label{font-size:12px;color:var(--text-3);letter-spacing:.1em}
.post-nav .pn-title{font-size:15px;font-weight:600;color:var(--text);line-height:1.5}
.post-nav .pn-next{text-align:right;align-items:flex-end}

.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  padding:64px 20px;text-align:center;
}
.empty-state svg{width:64px;height:64px;stroke:var(--text-3);stroke-width:1.5;fill:none}
.empty-state p{font-size:16px;color:var(--text-2)}

/* ================= sidebar ================= */
.sidebar{display:flex;flex-direction:column;gap:20px;margin-top:28px}
@media (min-width:1024px){
  .sidebar{position:sticky;top:96px;margin-top:0}
}
.side-card{
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:22px;
  box-shadow:var(--shadow-sm),inset 0 1px 0 rgba(255,255,255,.07);
}
.side-card h3{
  display:flex;align-items:center;gap:8px;
  font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em;
}
.side-card h3::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent)}
.side-list li + li{border-top:1px solid var(--border)}
.side-list a{
  display:block;padding:12px 0;font-size:14px;color:var(--text-2);line-height:1.6;
  transition:color var(--ease),padding-left var(--ease);
}
.side-list a:hover{color:var(--cyan);padding-left:6px}
.side-list .side-time{display:block;margin-top:4px;font-size:12px;color:var(--text-3);font-variant-numeric:tabular-nums}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.side-thumb{border-radius:12px;overflow:hidden;border:1px solid var(--border);margin-bottom:16px;aspect-ratio:16/10}
.side-thumb img{width:100%;height:100%;object-fit:cover}
.side-note{font-size:13px;color:var(--text-3);line-height:1.7;margin-bottom:16px}

/* ================= related ================= */
.related-section{padding:8px 0 96px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px}
.section-head .eyebrow{
  display:block;font-size:11px;letter-spacing:.18em;color:var(--cyan);font-weight:700;margin-bottom:10px;
}
.section-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.35;color:#fff}
.section-head .more{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);
  transition:color var(--ease),gap var(--ease);
}
.section-head .more:hover{color:var(--accent);gap:12px}

.card-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}

.r-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.r-card:hover{transform:translateY(-4px);border-color:rgba(242,101,34,.45);box-shadow:var(--shadow-lg)}
.r-card .r-img{aspect-ratio:16/10;overflow:hidden;border-bottom:1px solid var(--border)}
.r-card .r-img img{width:100%;height:100%;object-fit:cover;transition:transform 600ms cubic-bezier(.2,.7,.3,1)}
.r-card:hover .r-img img{transform:scale(1.04)}
.r-card .r-body{display:flex;flex-direction:column;flex:1;padding:22px}
.r-card .r-body h3{font-size:18px;font-weight:700;line-height:1.5;color:#fff;margin-bottom:10px}
.r-card .r-body p{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:16px}
.r-card .r-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3);padding-top:14px;border-top:1px solid var(--border)}
.r-card .r-foot i{transition:transform var(--ease)}
.r-card:hover .r-foot i{transform:translateX(4px);color:var(--accent)}
.r-badge-row{margin-bottom:14px}

/* ================= CTA ================= */
.cta-band{
  position:relative;overflow:hidden;
  border-top:2px solid var(--accent);
  background:#0F1A22;
  padding:64px 0;
}
.cta-band::after{
  content:"";position:absolute;right:-140px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(242,101,34,.16),transparent 68%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:grid;gap:28px;align-items:center}
@media (min-width:1024px){.cta-inner{grid-template-columns:7fr 5fr}}
.cta-inner h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:#fff;line-height:1.35;margin-bottom:12px}
.cta-inner p{font-size:15px;color:var(--text-2);max-width:520px}
.cta-form{display:flex;gap:12px;flex-wrap:wrap}
.cta-form input{
  flex:1 1 220px;min-width:0;min-height:48px;padding:0 16px;
  background:rgba(255,255,255,.04);border:1px solid var(--border-strong);
  border-radius:var(--radius-btn);color:var(--text);outline:none;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.cta-form input::placeholder{color:var(--text-3)}
.cta-form input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18);background:rgba(255,255,255,.07)}
.cta-form .btn{flex:0 0 auto;min-height:48px}
.cta-note{margin-top:12px;font-size:12.5px;color:var(--text-3)}

/* ================= footer ================= */
.site-footer{
  position:relative;
  background:#070E13;
  border-top:1px solid var(--border);
  padding:64px 0 0;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(242,101,34,.7),transparent);
}
.footer-main{display:grid;gap:36px;grid-template-columns:1fr;padding-bottom:44px}
@media (min-width:768px){.footer-main{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-main{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px}}

.footer-brand .brand{margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.8;margin-bottom:18px;max-width:360px}
.footer-contact{display:flex;flex-direction:column;gap:10px;font-size:13.5px;color:var(--text-3)}
.footer-contact i{width:16px;color:var(--cyan);margin-right:8px}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{
  display:grid;place-items:center;width:38px;height:38px;border-radius:10px;
  border:1px solid var(--border-strong);color:var(--text-2);font-size:14px;
  transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease);
}
.footer-social a:hover{color:var(--cyan);border-color:rgba(78,197,220,.5);background:rgba(78,197,220,.08);transform:translateY(-2px)}

.footer-col h4{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col ul a{font-size:13.5px;color:var(--text-2);transition:color var(--ease),padding-left var(--ease)}
.footer-col ul a:hover{color:var(--cyan);padding-left:5px}

.footer-sub p{font-size:13.5px;color:var(--text-2);line-height:1.75;margin-bottom:16px}
.footer-sub .field{margin-bottom:12px}
.footer-sub input{
  width:100%;min-height:44px;padding:0 16px;
  background:rgba(255,255,255,.04);border:1px solid var(--border-strong);
  border-radius:var(--radius-btn);color:var(--text);outline:none;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.footer-sub input::placeholder{color:var(--text-3)}
.footer-sub input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18)}
.footer-sub .btn{width:100%}
.footer-note{margin-top:12px;font-size:12px;color:var(--text-3);line-height:1.7}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  padding:22px 0 28px;border-top:1px solid var(--border);
  font-size:12.5px;color:var(--text-3);
}
.footer-legal{margin-right:auto}
.back-top{
  margin-left:auto;display:grid;place-items:center;width:40px;height:40px;
  border-radius:10px;border:1px solid var(--border-strong);
  background:rgba(255,255,255,.04);color:var(--text-2);cursor:pointer;
  transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease);
}
.back-top:hover{color:var(--accent);border-color:rgba(242,101,34,.5);background:rgba(242,101,34,.1);transform:translateY(-2px)}
.back-top:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

/* ================= utilities ================= */
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .r-card:hover,.post-nav a:hover,.footer-social a:hover,.back-top:hover{transform:none}
}

/* ================= responsive tweaks ================= */
@media (max-width:639px){
  body{font-size:15.5px}
  .page-hero{padding:72px 0 40px}
  .page-hero .kv-container{padding-left:20px;padding-right:20px}
  .article-panel{padding:24px 18px 28px}
  .article-body{font-size:16px}
  .breadcrumb .current{max-width:200px}
  .cta-form .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .back-top{margin-left:0}
}
@media (min-width:640px) and (max-width:1023px){
  .page-hero{padding:88px 0 48px}
}

/* roulang page: category1 */
/* ===== tokens ===== */
:root{
  --bg:#0A1218;
  --panel:#0F1A22;
  --panel-2:#132029;
  --accent:#F26522;
  --accent-hover:#FF7F3F;
  --accent-soft:#FFB58C;
  --cyan:#4EC5DC;
  --text:#E9EFF3;
  --text-2:#A9B7C1;
  --text-3:#6E808C;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --light-bg:#F4F6F7;
  --light-panel:#FFFFFF;
  --light-text:#10202B;
  --light-text-2:#3C5563;
  --light-line:#D6DEE3;
  --radius-lg:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-light:0 12px 28px rgba(16,32,43,.08);
  --container:1240px;
  --gap:24px;
  --dur:240ms;
  --font:"Inter","PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",sans-serif;
}
/* ===== reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(circle at 18% 0%,rgba(78,197,220,.07),transparent 42%),
    radial-gradient(circle at 88% 6%,rgba(242,101,34,.06),transparent 38%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,ul,ol,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;object-fit:cover}
button,input,select,textarea{font:inherit;color:inherit}
button{border:0;background:none;cursor:pointer}
strong{font-weight:700}
em{font-style:normal}
::selection{background:rgba(242,101,34,.35);color:#fff}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
/* ===== layout ===== */
.kv-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:96px 0}
.section-alt{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-light{background:var(--light-bg);color:var(--light-text)}
.section-head{max-width:760px;margin-bottom:48px}
.eyebrow{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.18em;color:var(--cyan);margin-bottom:14px;text-transform:uppercase}
.section h2{font-size:clamp(24px,2.6vw,36px);font-weight:700;line-height:1.3;letter-spacing:-0.01em}
.section-desc{margin-top:16px;font-size:16px;color:var(--text-2);max-width:640px}
.section-light .section-desc{color:var(--light-text-2)}
.section-light .eyebrow{color:#C24E12}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px}
.grid-x>.cell{min-width:0}
/* ===== nav ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:transparent;border-bottom:1px solid transparent;
  transition:background var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.site-header.is-scrolled{
  background:rgba(10,18,24,.88);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  backdrop-filter:blur(16px) saturate(130%);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px rgba(0,0,0,.35);
}
.nav-inner{display:flex;align-items:center;gap:28px;height:76px;transition:height var(--dur) ease}
.site-header.is-scrolled .nav-inner{height:64px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:12px;border:1px solid var(--line-2);background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02))}
.brand-mark svg{width:26px;height:26px}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-text strong{font-size:22px;font-weight:900;letter-spacing:-0.02em;color:#fff}
.brand-text em{font-size:11px;letter-spacing:.16em;color:var(--text-3);margin-top:4px}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav a{position:relative;font-size:15px;color:var(--text-2);transition:color var(--dur) ease;padding:6px 0}
.main-nav a:hover{color:var(--text)}
.main-nav a.is-active{color:#fff;font-weight:600}
.main-nav a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;background:var(--accent)}
.nav-tools{display:flex;align-items:center;gap:18px;margin-left:auto}
.nav-search{position:relative;display:flex;align-items:center;width:200px;transition:width var(--dur) ease}
.nav-search:focus-within{width:280px}
.nav-search i{position:absolute;left:14px;font-size:13px;color:var(--text-3);pointer-events:none}
.nav-search input{
  width:100%;height:40px;padding:0 14px 0 38px;font-size:14px;color:var(--text);
  background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:var(--radius-btn);
  transition:border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.nav-search input::placeholder{color:var(--text-3)}
.nav-search input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18)}
.nav-login{font-size:14px;color:var(--text-3);border-bottom:1px solid transparent;transition:color var(--dur) ease,border-color var(--dur) ease}
.nav-login:hover{color:var(--text);border-bottom-color:var(--line-2)}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);align-items:center}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform var(--dur) ease,opacity var(--dur) ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ===== buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;min-height:44px;
  transition:transform var(--dur) ease,box-shadow var(--dur) ease,background var(--dur) ease,border-color var(--dur) ease,color var(--dur) ease;
}
.btn-primary{
  background:linear-gradient(180deg,#FF8A3D,#F26522);
  color:#1A0E05;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 26px rgba(242,101,34,.35);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 14px 30px rgba(242,101,34,.45);filter:brightness(1.06)}
.btn-primary:active{transform:none;box-shadow:inset 0 1px 0 rgba(255,255,255,.3),0 6px 16px rgba(242,101,34,.25)}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(78,197,220,.5);color:#fff}
.btn-ghost:active{background:rgba(255,255,255,.03)}
.btn-sm{padding:9px 16px;font-size:14px;min-height:38px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none;filter:none}
/* ===== drawer ===== */
.drawer-mask{position:fixed;inset:0;background:rgba(6,12,17,.7);opacity:0;visibility:hidden;transition:opacity var(--dur) ease,visibility var(--dur) ease;z-index:90}
.drawer-mask.is-open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;left:0;bottom:0;width:84vw;max-width:340px;z-index:95;
  background:rgba(13,22,29,.96);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border-right:1px solid var(--line);padding:22px 20px 24px;
  transform:translateX(-102%);transition:transform var(--dur) ease;
  display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-search{position:relative;display:flex;align-items:center}
.drawer-search i{position:absolute;left:14px;font-size:13px;color:var(--text-3)}
.drawer-search input{width:100%;height:44px;padding:0 14px 0 38px;font-size:14px;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:var(--radius-btn);color:var(--text)}
.drawer-search input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18)}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{display:flex;align-items:center;justify-content:space-between;height:52px;font-size:16px;color:var(--text-2);border-bottom:1px solid var(--line)}
.drawer-nav a i{font-size:12px;color:var(--text-3)}
.drawer-nav a.is-active{color:#fff;font-weight:600}
.drawer-nav a.is-active i{color:var(--accent)}
.drawer-cta{margin-top:auto;width:100%}
/* ===== hero ===== */
.cat-hero{
  position:relative;display:flex;align-items:flex-end;min-height:400px;
  padding:160px 0 64px;
  background-image:linear-gradient(180deg,rgba(10,18,24,.72),rgba(10,18,24,.94)),linear-gradient(90deg,rgba(10,18,24,.95) 0%,rgba(10,18,24,.7) 50%,rgba(10,18,24,.45) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover,cover,cover;
  background-position:center,center,center;
  border-bottom:1px solid var(--line);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px}
.breadcrumb a{color:var(--text-2);transition:color var(--dur) ease}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb span.sep{color:var(--text-3)}
.breadcrumb .current{color:var(--text-3)}
.cat-hero h1{font-size:clamp(30px,4.6vw,52px);font-weight:800;line-height:1.18;letter-spacing:-0.01em;max-width:900px}
.hero-sub{margin-top:20px;font-size:17px;color:var(--text-2);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:52px;padding-top:26px;border-top:1px solid var(--line);max-width:820px}
.hero-metrics .metric strong{display:block;font-size:30px;font-weight:800;color:#fff;font-variant-numeric:tabular-nums;line-height:1.1}
.hero-metrics .metric span{display:block;margin-top:6px;font-size:12px;color:var(--text-3);letter-spacing:.04em}
/* ===== anchor bar ===== */
.anchor-section{background:var(--panel);border-bottom:1px solid var(--line);padding:18px 0}
.anchor-list{display:flex;align-items:center;gap:12px;overflow-x:auto;padding:4px 0;scrollbar-width:none}
.anchor-list::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;gap:8px;padding:9px 18px;white-space:nowrap;
  font-size:14px;color:var(--text-2);border:1px solid var(--line-2);border-radius:999px;
  transition:color var(--dur) ease,border-color var(--dur) ease,background var(--dur) ease;
}
.chip:hover{color:#fff;background:rgba(78,197,220,.08);border-color:rgba(78,197,220,.5)}
.chip.is-active{background:linear-gradient(180deg,#FF8A3D,#F26522);color:#1A0E05;border-color:transparent;font-weight:600}
/* ===== cards ===== */
.card{
  height:100%;padding:28px;border-radius:var(--radius-lg);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1),var(--shadow);
  transition:transform var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(242,101,34,.45);box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 22px 46px rgba(0,0,0,.5)}
.card-icon{display:flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:var(--radius-sm);border:1px solid rgba(78,197,220,.35);background:rgba(78,197,220,.09);color:var(--cyan);font-size:18px;margin-bottom:20px}
.card h3{font-size:19px;font-weight:700;line-height:1.45;margin-bottom:12px}
.card p{font-size:15px;color:var(--text-2)}
.card-num{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--accent);margin-bottom:12px}
/* ===== matrix ===== */
.matrix-card{
  display:flex;flex-direction:column;height:100%;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1),var(--shadow);
  transition:transform var(--dur) ease,border-color var(--dur) ease;
}
.matrix-card:hover{transform:translateY(-3px);border-color:rgba(242,101,34,.45)}
.matrix-media{position:relative;width:100%;aspect-ratio:16/10;overflow:hidden}
.matrix-media img{width:100%;height:100%;transition:transform 420ms ease}
.matrix-card:hover .matrix-media img{transform:scale(1.04)}
.matrix-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,18,24,0) 45%,rgba(10,18,24,.7) 100%)}
.tag-row{position:absolute;left:20px;bottom:16px;display:flex;flex-wrap:wrap;gap:8px;z-index:2}
.tag{display:inline-flex;align-items:center;padding:4px 10px;font-size:11px;font-weight:600;letter-spacing:.04em;border-radius:999px;border:1px solid rgba(78,197,220,.45);color:#CFF1F8;background:rgba(10,18,24,.55)}
.tag.tag-accent{border-color:rgba(242,101,34,.55);color:var(--accent-soft)}
.matrix-body{padding:26px 28px 30px;display:flex;flex-direction:column;flex:1}
.matrix-body h3{font-size:22px;font-weight:700;line-height:1.4;margin-bottom:12px}
.matrix-body p{font-size:15px;color:var(--text-2)}
.spec-list{margin-top:20px;border-top:1px solid var(--line);padding-top:16px;display:flex;flex-direction:column;gap:10px}
.spec-list li{display:flex;align-items:baseline;justify-content:space-between;gap:16px;font-size:14px}
.spec-list li span{color:var(--text-3)}
.spec-list li strong{color:var(--text);font-variant-numeric:tabular-nums;font-weight:600}
.matrix-link{margin-top:24px;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--accent-soft);transition:gap var(--dur) ease,color var(--dur) ease}
.matrix-link:hover{gap:12px;color:var(--accent-hover)}
/* ===== scenes (light) ===== */
.scene-row{align-items:center;margin-bottom:72px}
.scene-row:last-child{margin-bottom:0}
.scene-media{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--light-line);box-shadow:var(--shadow-light)}
.scene-media img{width:100%;aspect-ratio:16/10}
.scene-copy{padding:8px 0}
.scene-num{display:inline-block;font-size:44px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.2px rgba(16,32,43,.3);font-variant-numeric:tabular-nums}
.scene-copy h3{font-size:26px;font-weight:700;line-height:1.35;margin:14px 0 16px;color:var(--light-text)}
.scene-copy p{font-size:16px;color:var(--light-text-2)}
.tick-list{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.tick-list li{display:flex;gap:12px;font-size:15px;color:var(--light-text-2)}
.tick-list li i{color:#C24E12;font-size:13px;margin-top:7px}
/* ===== flow ===== */
.flow-wrap{position:relative;padding-top:8px}
.flow-steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.flow-steps::before{content:"";position:absolute;top:15px;left:6%;right:6%;height:1px;background:linear-gradient(90deg,rgba(78,197,220,.1),rgba(78,197,220,.6),rgba(78,197,220,.1))}
.flow-step{position:relative;text-align:center;padding:0 8px}
.flow-dot{position:relative;z-index:2;display:flex;align-items:center;justify-content:center;width:32px;height:32px;margin:0 auto 20px;border-radius:50%;background:var(--panel-2);border:1px solid rgba(78,197,220,.6);color:var(--cyan);font-size:13px;font-weight:700}
.flow-step h3{font-size:17px;font-weight:700;margin-bottom:10px}
.flow-step p{font-size:14px;color:var(--text-2)}
/* ===== spec rows ===== */
.spec-rows{display:flex;flex-direction:column;gap:14px}
.spec-row{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr auto;gap:24px;align-items:center;
  padding:22px 26px;border-radius:var(--radius-lg);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  transition:border-color var(--dur) ease,transform var(--dur) ease,box-shadow var(--dur) ease;
}
.spec-row:hover{border-color:rgba(242,101,34,.45);transform:translateY(-2px);box-shadow:0 16px 34px rgba(0,0,0,.4)}
.spec-name .spec-code{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--accent);margin-bottom:6px}
.spec-name h3{font-size:17px;font-weight:700;line-height:1.4}
.spec-item span{display:block;font-size:12px;color:var(--text-3);letter-spacing:.04em}
.spec-item strong{display:block;margin-top:4px;font-size:16px;font-weight:700;font-variant-numeric:tabular-nums}
.spec-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--cyan);white-space:nowrap;transition:gap var(--dur) ease}
.spec-link:hover{gap:12px}
.spec-note{margin-top:24px;font-size:13px;color:var(--text-3)}
/* ===== faq ===== */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{
  margin-bottom:14px;border-radius:var(--radius-lg);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  overflow:hidden;transition:border-color var(--dur) ease;
}
.faq-item[open]{border-color:rgba(78,197,220,.4)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;cursor:pointer;font-size:17px;font-weight:700;line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{position:relative;flex:0 0 22px;width:22px;height:22px;border-radius:50%;border:1px solid var(--line-2);transition:transform var(--dur) ease,border-color var(--dur) ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--cyan);transform:translate(-50%,-50%)}
.faq-icon::before{width:10px;height:1.5px}
.faq-icon::after{width:1.5px;height:10px;transition:opacity var(--dur) ease}
.faq-item[open] .faq-icon{transform:rotate(180deg);border-color:rgba(78,197,220,.6)}
.faq-item[open] .faq-icon::after{opacity:0}
.faq-item summary:hover{color:#fff}
.faq-body{padding:0 24px 22px;font-size:15px;color:var(--text-2);max-width:760px}
/* ===== cta band ===== */
.cta-band{background:var(--panel-2);border-top:2px solid var(--accent);padding:80px 0;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(90deg,rgba(10,18,24,.94),rgba(10,18,24,.86)),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;opacity:.55}
.cta-inner{position:relative;z-index:2}
.cta-band h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.35}
.cta-band p{margin-top:16px;font-size:16px;color:var(--text-2);max-width:520px}
.cta-form{display:flex;flex-direction:column;gap:12px}
.cta-field input{
  width:100%;height:48px;padding:0 16px;font-size:15px;color:var(--text);
  background:rgba(255,255,255,.04);border:1px solid var(--line-2);border-radius:var(--radius-btn);
  transition:border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.cta-field input::placeholder{color:var(--text-3)}
.cta-field input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18)}
.form-hint{font-size:12px;color:var(--text-3);line-height:1.7}
/* ===== footer ===== */
.site-footer{background:#070E13;border-top:1px solid rgba(242,101,34,.45);padding:72px 0 0}
.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand .brand{margin-bottom:20px}
.footer-desc{font-size:14px;color:var(--text-2);max-width:340px}
.footer-contact{margin-top:22px;display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--text-3)}
.footer-contact i{color:var(--cyan);width:16px;margin-right:8px}
.footer-social{display:flex;gap:12px;margin-top:22px}
.footer-social a{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:var(--radius-btn);border:1px solid var(--line);color:var(--text-2);transition:border-color var(--dur) ease,color var(--dur) ease,background var(--dur) ease}
.footer-social a:hover{border-color:rgba(78,197,220,.5);color:#fff;background:rgba(78,197,220,.08)}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col ul a{font-size:14px;color:var(--text-2);transition:color var(--dur) ease}
.footer-col ul a:hover{color:var(--accent-soft)}
.footer-sub p{font-size:14px;color:var(--text-2);margin-bottom:18px}
.footer-sub .field{margin-bottom:12px}
.footer-sub input{width:100%;height:46px;padding:0 16px;font-size:14px;color:var(--text);background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:var(--radius-btn);transition:border-color var(--dur) ease,box-shadow var(--dur) ease}
.footer-sub input::placeholder{color:var(--text-3)}
.footer-sub input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18)}
.footer-sub .btn{width:100%}
.footer-bottom{margin-top:56px;border-top:1px solid var(--line);padding:22px 0 28px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;font-size:13px;color:var(--text-3)}
.footer-bottom .bottom-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom a:hover{color:var(--accent-soft)}
/* ===== to top ===== */
.to-top{
  position:fixed;right:22px;bottom:24px;z-index:70;
  display:flex;align-items:center;justify-content:center;width:46px;height:46px;
  border-radius:50%;border:1px solid var(--line-2);color:var(--text);
  background:rgba(15,26,34,.9);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--dur) ease,transform var(--dur) ease,visibility var(--dur) ease,border-color var(--dur) ease,color var(--dur) ease;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--accent);color:var(--accent-soft)}
/* ===== responsive ===== */
@media screen and (max-width:1200px){
  .footer-main{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-sub{grid-column:1 / -1;max-width:520px}
}
@media screen and (max-width:1023px){
  .main-nav,.nav-search,.nav-login{display:none}
  .nav-toggle{display:flex}
  .section{padding:72px 0}
  .cat-hero{padding:140px 0 56px;min-height:340px}
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:24px}
  .scene-row{margin-bottom:56px}
  .scene-copy{margin-top:28px}
  .scene-row.is-reverse .scene-media{order:2}
  .scene-row.is-reverse .scene-copy{order:1}
  .flow-steps{grid-template-columns:repeat(2,1fr);gap:32px 24px}
  .flow-steps::before{display:none}
  .spec-row{grid-template-columns:1fr 1fr;gap:18px}
  .spec-link{grid-column:1 / -1}
}
@media screen and (max-width:767px){
  .nav-cta{display:none}
  .kv-container{padding:0 20px}
  .section{padding:56px 0}
  .cat-hero p.hero-sub{font-size:15px}
  .hero-actions .btn{width:100%}
  .hero-metrics{grid-template-columns:repeat(2,1fr);margin-top:36px}
  .hero-metrics .metric strong{font-size:24px}
  .matrix-body{padding:22px 20px 26px}
  .card{padding:22px}
  .flow-steps{grid-template-columns:1fr}
  .flow-step{text-align:left;display:flex;gap:16px;align-items:flex-start}
  .flow-dot{margin:4px 0 0}
  .spec-row{grid-template-columns:1fr;padding:20px}
  .footer-main{grid-template-columns:1fr;gap:34px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-band{padding:56px 0}
  .to-top{right:16px;bottom:18px}
}
@media screen and (min-width:1440px){
  :root{--container:1280px}
  .grid-margin-x{margin-left:-16px;margin-right:-16px}
  .grid-margin-x>.cell{padding-left:16px;padding-right:16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
/* ============ reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:#0A1218;color:#E9EFF3;font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Inter",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure{margin:0}
figure{margin:0}
input,textarea,select{font:inherit}
h1,h2,h3,h4{font-family:inherit;color:inherit;font-weight:700;letter-spacing:-.01em;line-height:1.3;margin:0}
:focus-visible{outline:2px solid #4EC5DC;outline-offset:2px;border-radius:4px}
::selection{background:rgba(242,101,34,.35)}

/* ============ tokens ============ */
:root{
  --bg:#0A1218;
  --panel:#0F1A22;
  --panel-2:#132029;
  --deep:#070E13;
  --light:#F4F6F7;
  --light-text:#10202B;
  --light-sub:#41535f;
  --light-line:#D6DEE3;
  --orange:#F26522;
  --orange-hover:#FF7F3F;
  --orange-soft:#FFB58C;
  --cyan:#4EC5DC;
  --cyan-deep:#1F6E7F;
  --text:#E9EFF3;
  --text-2:#A9B7C1;
  --text-3:#6E808C;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-hover:0 22px 48px rgba(0,0,0,.55);
  --shadow-light:0 12px 28px rgba(16,32,43,.08);
  --container:1240px;
  --t:240ms cubic-bezier(.4,0,.2,1);
}

/* ============ layout ============ */
.kv-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:640px){.kv-container{padding:0 32px}}
@media (min-width:1024px){.kv-container{padding:0 48px}}
@media (min-width:1440px){:root{--container:1280px}}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--orange);color:#1A0E06;padding:10px 18px;border-radius:0 0 var(--r-btn) 0;z-index:200}
.skip-link:focus{left:0}
.section{padding:56px 0}
@media (min-width:640px){.section{padding:72px 0}}
@media (min-width:1024px){.section{padding:100px 0}}
.section-dark{background:var(--bg)}
.section-panel{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-light{background:var(--light);color:var(--light-text);border-top:1px solid var(--light-line);border-bottom:1px solid var(--light-line)}
.section-head{max-width:780px;margin-bottom:40px}
@media (min-width:1024px){.section-head{margin-bottom:56px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:11px;letter-spacing:.18em;color:var(--cyan);margin-bottom:14px;font-weight:600}
.eyebrow::before{content:'';width:6px;height:6px;background:var(--orange);border-radius:1px}
.section-light .eyebrow{color:var(--cyan-deep)}
.section-head h2{font-size:clamp(24px,2.6vw,36px);line-height:1.3;font-weight:700}
.section-head p{margin-top:16px;color:var(--text-2);font-size:15px;line-height:1.85;max-width:720px}
.section-light .section-head p{color:var(--light-sub)}
.divider{height:1px;background:var(--line);margin:0}

/* ============ nav / header ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:60;background:transparent;border-bottom:1px solid transparent;transition:background var(--t),border-color var(--t),backdrop-filter var(--t)}
.site-header.is-scrolled{background:rgba(10,18,24,.86);backdrop-filter:blur(14px) saturate(120%);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;gap:16px;height:76px;transition:height var(--t)}
.site-header.is-scrolled .header-inner{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line-2);border-radius:10px;background:rgba(255,255,255,.04);transition:border-color var(--t),background var(--t)}
.brand:hover .brand-mark{border-color:rgba(78,197,220,.55);background:rgba(78,197,220,.08)}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-text strong{font-size:19px;font-weight:900;letter-spacing:-.02em}
.brand-text em{font-style:normal;font-size:11px;letter-spacing:.16em;color:var(--text-3);margin-top:4px}
.main-nav{display:none;align-items:center;gap:2px;margin-left:12px}
@media (min-width:1024px){.main-nav{display:flex}}
.main-nav a{position:relative;padding:10px 14px;font-size:15px;color:var(--text-2);border-radius:8px;transition:color var(--t),background var(--t)}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.main-nav a.is-active{color:#FFFFFF;font-weight:600}
.main-nav a.is-active::after{content:'';position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--orange);border-radius:2px}
.header-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{position:relative;display:none;align-items:center;width:200px;transition:width var(--t)}
@media (min-width:1024px){.search-box{display:flex}}
.search-box:focus-within{width:280px}
.search-box input{width:100%;height:38px;padding:0 36px 0 14px;border-radius:var(--r-btn);background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);font-size:14px;transition:border-color var(--t),box-shadow var(--t),background var(--t)}
.search-box input::placeholder{color:var(--text-3)}
.search-box input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18);background:rgba(255,255,255,.06)}
.search-box i{position:absolute;right:13px;font-size:13px;color:var(--text-3);pointer-events:none}
.link-entry{display:none;font-size:14px;color:var(--text-2);padding:6px 2px;border-bottom:1px solid transparent;transition:color var(--t),border-color var(--t)}
@media (min-width:1024px){.link-entry{display:inline-block}}
.link-entry:hover{color:var(--text);border-bottom-color:var(--cyan)}
.header-cta{display:none}
@media (min-width:640px){.header-cta{display:inline-flex}}
.nav-toggle{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:44px;height:44px;border:1px solid var(--line-2);border-radius:10px;background:rgba(255,255,255,.04);transition:border-color var(--t),background var(--t)}
@media (min-width:1024px){.nav-toggle{display:none}}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform var(--t),opacity var(--t)}
.nav-toggle:hover{border-color:rgba(78,197,220,.55)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-overlay{position:fixed;inset:0;background:rgba(6,12,17,.7);opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);z-index:70}
.nav-overlay.is-open{opacity:1;visibility:visible}
.nav-drawer{position:fixed;top:0;left:0;bottom:0;width:84vw;max-width:340px;z-index:80;display:flex;flex-direction:column;padding:20px;background:rgba(12,22,29,.97);backdrop-filter:blur(14px) saturate(120%);border-right:1px solid var(--line);transform:translateX(-100%);transition:transform var(--t)}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-search{position:relative;margin-bottom:18px}
.drawer-search input{width:100%;height:44px;padding:0 40px 0 14px;border-radius:var(--r-btn);background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);font-size:14px}
.drawer-search input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18)}
.drawer-search i{position:absolute;right:14px;top:15px;color:var(--text-3);font-size:13px}
.drawer-nav a{display:flex;align-items:center;justify-content:space-between;height:52px;padding:0 4px;border-bottom:1px solid var(--line);color:var(--text-2);font-size:16px;transition:color var(--t),padding var(--t)}
.drawer-nav a:hover{color:var(--text);padding-left:10px}
.drawer-nav a.is-active{color:var(--orange-soft);font-weight:600}
.drawer-nav a i{font-size:12px;color:var(--text-3)}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line)}
.drawer-foot .btn{width:100%}

/* ============ buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;min-height:44px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;letter-spacing:.01em;transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t),color var(--t),filter var(--t);white-space:nowrap}
.btn-primary{background:linear-gradient(180deg,var(--orange),#FF8A3D);color:#1A0E06;box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 26px rgba(242,101,34,.35)}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 14px 32px rgba(242,101,34,.45)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 6px 16px rgba(242,101,34,.25)}
.btn-ghost{background:transparent;border:1px solid var(--line-2);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.3)}
.btn-ghost:active{background:rgba(255,255,255,.1)}
.btn-sm{height:38px;min-height:38px;padding:0 16px;font-size:14px}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}
.link-more{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-size:14px;font-weight:600;transition:gap var(--t),color var(--t)}
.link-more:hover{gap:12px;color:var(--orange-soft)}

/* ============ hero ============ */
.page-hero{position:relative;padding:140px 0 60px;background-image:linear-gradient(100deg,rgba(10,18,24,.94) 0%,rgba(10,18,24,.78) 52%,rgba(10,18,24,.58) 100%),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;border-bottom:1px solid var(--line);overflow:hidden}
.page-hero::after{content:'';position:absolute;inset:0;background:radial-gradient(120% 120% at 0% 50%,rgba(10,18,24,.75),transparent 62%);pointer-events:none}
@media (min-width:1024px){.page-hero{padding:170px 0 80px;min-height:400px;display:flex;align-items:center}}
.hero-inner{position:relative;z-index:2;max-width:840px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px}
.breadcrumb a{transition:color var(--t)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{color:rgba(255,255,255,.25)}
.breadcrumb .current{color:var(--cyan)}
.page-hero h1{font-size:clamp(28px,4vw,48px);font-weight:800;line-height:1.2;letter-spacing:-.01em;max-width:16em}
.hero-lead{margin-top:20px;color:var(--text-2);font-size:15px;line-height:1.85;max-width:620px}
@media (min-width:1024px){.hero-lead{font-size:16px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* ============ anchor chips ============ */
.anchor-bar{background:var(--panel);border-bottom:1px solid var(--line);padding:18px 0}
.chip-row{display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
.chip-row::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;padding:9px 18px;border-radius:var(--r-pill);border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text-2);font-size:14px;transition:color var(--t),border-color var(--t),background var(--t)}
.chip:hover{color:var(--text);border-color:rgba(242,101,34,.5);background:rgba(242,101,34,.08)}
.chip.is-active{background:linear-gradient(180deg,var(--orange),#FF8A3D);border-color:transparent;color:#1A0E06;font-weight:600}

/* ============ scene blocks ============ */
.scene{display:grid;gap:28px;align-items:center;margin-bottom:64px}
.scene:last-child{margin-bottom:0}
@media (min-width:1024px){
  .scene{grid-template-columns:1.05fr .95fr;gap:56px;margin-bottom:88px}
  .scene.is-reverse .scene-media{order:2}
}
.scene-media{position:relative;border-radius:var(--r-sm);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);transition:box-shadow var(--t),transform var(--t)}
.scene-media:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.section-light .scene-media{border-color:var(--light-line);box-shadow:var(--shadow-light)}
.section-light .scene-media:hover{box-shadow:0 18px 34px rgba(16,32,43,.14)}
.scene-index{display:block;font-size:52px;font-weight:800;line-height:1;color:rgba(78,197,220,.45);margin-bottom:14px;font-variant-numeric:tabular-nums}
@supports (-webkit-text-stroke:1px #000){
  .scene-index{color:transparent;-webkit-text-stroke:1.5px rgba(78,197,220,.7)}
  .section-light .scene-index{-webkit-text-stroke:1.5px rgba(31,110,127,.5)}
}
.scene-body h3{font-size:clamp(19px,2vw,24px);font-weight:700;line-height:1.45;margin-bottom:16px}
.scene-body p{color:var(--text-2);font-size:15px;line-height:1.9}
.section-light .scene-body p{color:var(--light-sub)}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tag{display:inline-flex;align-items:center;padding:5px 12px;border-radius:var(--r-pill);border:1px solid var(--line-2);font-size:12px;color:var(--text-2);letter-spacing:.02em}
.section-light .tag{border-color:var(--light-line);color:var(--light-sub)}
.spec-list{margin-top:22px;display:grid;gap:12px}
.spec-list li{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--text-2);line-height:1.7;padding-bottom:12px;border-bottom:1px solid var(--line)}
.spec-list li:last-child{border-bottom:0;padding-bottom:0}
.section-light .spec-list li{color:#33454f;border-bottom-color:var(--light-line)}
.spec-list i{color:var(--cyan);font-size:13px;margin-top:5px;flex:0 0 auto}
.section-light .spec-list i{color:var(--cyan-deep)}

/* ============ steps ============ */
.steps{display:grid;gap:20px;margin-top:8px}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);gap:0;position:relative}
  .steps::before{content:'';position:absolute;top:22px;left:5%;right:5%;height:1px;background:linear-gradient(90deg,rgba(78,197,220,.55),rgba(78,197,220,.12));z-index:0}}
.step{position:relative;z-index:1;background:rgba(255,255,255,.025);border:1px solid var(--line);border-radius:var(--r-card);padding:22px}
@media (min-width:1024px){.step{background:transparent;border:0;border-radius:0;padding:0 22px}}
.step-dot{width:44px;height:44px;border-radius:50%;border:1px solid rgba(78,197,220,.5);background:var(--bg);display:grid;place-items:center;font-weight:800;color:var(--cyan);font-size:15px;font-variant-numeric:tabular-nums;margin-bottom:18px;transition:border-color var(--t),color var(--t),box-shadow var(--t)}
.step:hover .step-dot{border-color:var(--orange);color:var(--orange-soft);box-shadow:0 0 0 4px rgba(242,101,34,.12)}
.step h4{font-size:17px;font-weight:700;margin-bottom:10px}
.step p{font-size:14px;color:var(--text-2);line-height:1.8}

/* ============ quotes ============ */
.quote-grid{display:grid;gap:24px}
@media (min-width:768px){.quote-grid{grid-template-columns:repeat(2,1fr);gap:28px}}
.quote-card{border-left:3px solid var(--cyan);background:rgba(255,255,255,.03);border-radius:0 var(--r-sm) var(--r-sm) 0;padding:26px;transition:background var(--t),border-color var(--t)}
.quote-card:hover{background:rgba(255,255,255,.055);border-left-color:var(--orange)}
.quote-card p{color:var(--text-2);font-size:15px;line-height:1.9}
.quote-meta{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center}
.quote-meta strong{color:var(--text);font-weight:600}
.quote-meta span{color:var(--text-3)}

/* ============ faq ============ */
.faq{max-width:860px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--r-sm);background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));margin-bottom:12px;overflow:hidden;transition:border-color var(--t),background var(--t)}
.faq-item:hover{border-color:var(--line-2)}
.faq-item[open]{border-color:rgba(242,101,34,.42)}
.faq-q{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 22px;font-size:16px;font-weight:600;color:var(--text);transition:color var(--t)}
.faq-q::-webkit-details-marker{display:none}
.faq-q::marker{content:''}
.faq-q:hover{color:var(--orange-soft)}
.faq-icon{position:relative;flex:0 0 auto;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{content:'';position:absolute;background:var(--orange);border-radius:2px;transition:transform var(--t)}
.faq-icon::before{left:9px;top:3px;width:2px;height:14px}
.faq-icon::after{left:3px;top:9px;width:14px;height:2px}
details[open] .faq-icon::before{transform:scaleY(0)}
.faq-a{padding:0 22px 22px;color:var(--text-2);font-size:14.5px;line-height:1.9}
.faq-a p+p{margin-top:12px}

/* ============ cta ============ */
.cta-band{background:var(--panel);border-top:2px solid var(--orange);padding:56px 0}
@media (min-width:1024px){.cta-band{padding:72px 0}}
.cta-band h2{font-size:clamp(22px,2.4vw,32px);font-weight:700;line-height:1.35}
.cta-band .cta-desc{margin-top:14px;color:var(--text-2);font-size:15px;line-height:1.85;max-width:560px}
.cta-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:22px;font-size:13px;color:var(--text-3)}
.cta-points span{display:inline-flex;align-items:center;gap:8px}
.cta-points i{color:var(--cyan);font-size:12px}
.cta-form{margin-top:28px}
@media (min-width:1024px){.cta-form{margin-top:0}}
.form-card{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;backdrop-filter:blur(14px) saturate(120%)}
.form-card h3{font-size:17px;font-weight:700;margin-bottom:6px}
.form-card .form-tip{font-size:13px;color:var(--text-3);margin-bottom:18px;line-height:1.7}
.form-row{display:flex;flex-wrap:wrap;gap:12px}
.field{flex:1 1 200px;display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;color:var(--text-2)}
.field input{width:100%;height:46px;padding:0 16px;border-radius:var(--r-btn);background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text);font-size:14px;transition:border-color var(--t),box-shadow var(--t),background var(--t)}
.field input::placeholder{color:var(--text-3)}
.field input:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18);background:rgba(255,255,255,.07)}
.cta-form .btn{width:100%;margin-top:14px}
.form-note{margin-top:12px;font-size:12px;color:var(--text-3);line-height:1.7}

/* ============ footer ============ */
.site-footer{background:var(--deep);border-top:1px solid rgba(242,101,34,.35);padding-top:60px}
@media (min-width:1024px){.site-footer{padding-top:72px}}
.footer-main{display:grid;gap:36px}
@media (min-width:768px){.footer-main{grid-template-columns:repeat(2,1fr);gap:40px}}
@media (min-width:1024px){.footer-main{grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:48px}}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{color:var(--text-2);font-size:14px;line-height:1.85;max-width:340px}
.footer-contact{margin-top:20px;display:grid;gap:10px}
.footer-contact div{display:flex;gap:10px;align-items:flex-start;color:var(--text-2);font-size:14px;line-height:1.7}
.footer-contact i{color:var(--cyan);font-size:13px;margin-top:6px;flex:0 0 auto}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{width:38px;height:38px;display:grid;place-items:center;border:1px solid var(--line);border-radius:10px;color:var(--text-2);transition:color var(--t),border-color var(--t),background var(--t),transform var(--t)}
.footer-social a:hover{color:var(--orange-soft);border-color:rgba(242,101,34,.5);background:rgba(242,101,34,.1);transform:translateY(-2px)}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--text)}
.footer-col ul{display:grid;gap:11px}
.footer-col ul a{color:var(--text-2);font-size:14px;transition:color var(--t),padding-left var(--t)}
.footer-col ul a:hover{color:var(--orange-soft);padding-left:5px}
.footer-sub p{color:var(--text-3);font-size:13px;line-height:1.8;margin-bottom:16px}
.footer-sub .field input{height:44px}
.footer-sub .btn{width:100%;margin-top:12px}
.footer-bottom{margin-top:48px;border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3)}
.footer-bottom a{color:var(--text-3);transition:color var(--t)}
.footer-bottom a:hover{color:var(--cyan)}
.footer-legal{display:flex;flex-wrap:wrap;gap:12px 20px}

/* ============ utilities ============ */
.back-top{position:fixed;right:20px;bottom:24px;width:46px;height:46px;display:grid;place-items:center;border-radius:12px;border:1px solid var(--line-2);background:rgba(15,26,34,.9);color:var(--cyan);backdrop-filter:blur(10px);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity var(--t),transform var(--t),visibility var(--t),border-color var(--t),color var(--t);z-index:55}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{border-color:rgba(242,101,34,.55);color:var(--orange-soft)}
@media (min-width:1024px){.back-top{right:36px;bottom:36px}}

/* ============ responsive ============ */
@media (max-width:1023px){
  .scene{margin-bottom:56px}
  .section-head{margin-bottom:32px}
}
@media (max-width:639px){
  .brand-text strong{font-size:17px}
  .hero-actions .btn{width:100%}
  .cta-band{padding:48px 0}
  .quote-card{padding:22px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a{padding:0 18px 18px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* roulang page: category3 */
/* ===================== tokens ===================== */
:root{
  --bg:#0A1218;
  --panel:#0F1A22;
  --panel-2:#132029;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#E9EFF3;
  --text-2:#A9B7C1;
  --text-3:#6E808C;
  --orange:#F26522;
  --orange-hi:#FF7F3F;
  --orange-soft:#FFB58C;
  --cyan:#4EC5DC;
  --steel:#F4F6F7;
  --steel-text:#10202B;
  --steel-sub:#4A5C68;
  --steel-line:#D6DEE3;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-dark:0 18px 40px rgba(0,0,0,.45);
  --sh-light:0 12px 28px rgba(16,32,43,.08);
  --t:240ms cubic-bezier(.4,0,.2,1);
  --container:1240px;
  --fs-h1:clamp(30px,4.6vw,56px);
  --fs-h2:clamp(24px,2.6vw,36px);
  --fs-h3:clamp(18px,1.5vw,22px);
  --fs-body:16px;
  --fs-aux:13px;
  --gap-sec:96px;
}

/* ===================== reset ===================== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",Inter,"Helvetica Neue",Arial,sans-serif;
  font-size:var(--fs-body);
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px),
    radial-gradient(circle at 50% 0%,rgba(78,197,220,.06),transparent 60%);
  background-size:32px 32px,32px 32px,100% 100%;
}
img{max-width:100%;height:auto;display:block;object-fit:cover;}
ul,ol{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:800;line-height:1.25;color:var(--text);}
p{margin:0;}
a{color:var(--cyan);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t);}
a:hover{color:var(--orange-soft);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;}
::selection{background:rgba(242,101,34,.35);color:#fff;}

/* ===================== layout ===================== */
.kv-container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
  position:relative;
  z-index:1;
}
@media (min-width:640px){.kv-container{padding:0 32px;}}
@media (min-width:1024px){.kv-container{padding:0 48px;}}
@media (min-width:1440px){.kv-container{max-width:1280px;}}

.section{padding:72px 0;}
@media (min-width:1024px){.section{padding:var(--gap-sec) 0;}}
.section-tight{padding:56px 0;}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:11px;
  letter-spacing:.18em;
  font-weight:600;
  color:var(--cyan);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;
  background:var(--orange);
  border-radius:1px;
  display:inline-block;
}
.sec-head{margin-bottom:40px;max-width:780px;}
.sec-head h2{font-size:var(--fs-h2);font-weight:700;}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:15px;line-height:1.85;}

/* ===================== header / nav ===================== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color var(--t),border-color var(--t),backdrop-filter var(--t);
}
.site-header.is-scrolled{
  background:rgba(10,18,24,.84);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:76px;
  transition:height var(--t);
}
.site-header.is-scrolled .header-inner{height:64px;}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{display:inline-flex;width:34px;height:34px;}
.brand-mark svg{width:100%;height:100%;}
.brand-text strong{
  display:block;
  font-size:20px;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1;
  color:var(--text);
}
.brand-text em{
  display:block;
  font-style:normal;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--text-3);
  margin-top:3px;
}

.main-nav{display:none;align-items:center;gap:2px;margin:0 auto;}
.main-nav a{
  position:relative;
  padding:10px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  border-radius:8px;
  white-space:nowrap;
}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.06);}
.main-nav a.is-active{color:var(--text);font-weight:700;}
.main-nav a.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:0;
  height:2px;border-radius:2px;
  background:var(--orange);
}

.header-actions{display:none;align-items:center;gap:12px;margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  height:40px;
  padding:0 12px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-search i{color:var(--text-3);font-size:13px;}
.nav-search input{
  width:110px;
  background:transparent;
  border:0;outline:0;
  font-size:14px;
  color:var(--text);
  transition:width var(--t);
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search:focus-within{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(78,197,220,.18);}
.nav-search:focus-within input{width:200px;}

.nav-login{
  font-size:14px;
  color:var(--text-2);
  padding:8px 4px;
  border-bottom:1px solid transparent;
}
.nav-login:hover{color:var(--text);border-bottom-color:var(--orange);}

.nav-burger{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:44px;height:44px;
  margin-left:auto;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  padding:0 11px;
  transition:border-color var(--t),background-color var(--t);
}
.nav-burger span{
  display:block;height:2px;width:100%;
  background:var(--text);
  border-radius:2px;
  transition:transform var(--t),opacity var(--t);
}
.nav-burger:hover{border-color:var(--line-2);background:rgba(255,255,255,.05);}
.nav-burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-burger.is-open span:nth-child(2){opacity:0;}
.nav-burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

@media (min-width:1024px){
  .main-nav{display:flex;}
  .header-actions{display:flex;}
  .nav-burger{display:none;}
}

/* drawer */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(6,12,17,.7);
  opacity:0;visibility:hidden;
  transition:opacity var(--t),visibility var(--t);
  z-index:118;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.nav-drawer{
  position:fixed;
  top:0;left:0;bottom:0;
  width:84vw;max-width:340px;
  background:rgba(15,26,34,.96);
  backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--line);
  transform:translateX(-102%);
  transition:transform var(--t);
  z-index:119;
  display:flex;flex-direction:column;
  padding:20px;
}
.nav-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-close{
  width:40px;height:40px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;
}
.drawer-close:hover{border-color:var(--line-2);color:var(--text);}
.drawer-search{
  display:flex;align-items:center;gap:8px;
  height:44px;padding:0 14px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  margin-bottom:18px;
}
.drawer-search input{flex:1;background:transparent;border:0;outline:0;font-size:14px;color:var(--text);}
.drawer-search input::placeholder{color:var(--text-3);}
.drawer-search i{color:var(--text-3);font-size:13px;}
.drawer-nav{flex:1;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;
  padding:0 14px;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
  font-size:15px;
  border-radius:8px;
  transition:background-color var(--t),color var(--t);
}
.drawer-nav a:hover{background:rgba(255,255,255,.06);color:var(--text);}
.drawer-nav a.is-active{color:var(--text);font-weight:700;}
.drawer-nav a i{font-size:12px;color:var(--text-3);}
.drawer-foot{padding-top:16px;}

/* ===================== buttons ===================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  white-space:nowrap;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),border-color var(--t),filter var(--t),color var(--t);
}
.btn-primary{
  background:linear-gradient(180deg,#FF8A3D,#F26522);
  color:#1A0A02;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 26px rgba(242,101,34,.35);
}
.btn-primary:hover{
  color:#1A0A02;
  transform:translateY(-1px);
  filter:brightness(1.06);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 12px 30px rgba(242,101,34,.45);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 6px 16px rgba(242,101,34,.25);
}
.btn-ghost{
  background:transparent;
  border-color:var(--line-2);
  color:var(--text);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.06);
  border-color:var(--cyan);
  color:var(--text);
}
.btn-ghost:active{background:rgba(255,255,255,.1);}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none!important;}

/* ===================== hero ===================== */
.cat-hero{
  position:relative;
  padding:150px 0 62px;
  min-height:380px;
  display:flex;
  align-items:flex-end;
  background-image:
    linear-gradient(90deg,rgba(6,12,17,.94) 0%,rgba(6,12,17,.78) 48%,rgba(6,12,17,.5) 100%),
    radial-gradient(circle at 12% 88%,rgba(6,12,17,.85),transparent 55%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover,cover,cover;
  background-position:center,center,center;
  border-bottom:1px solid var(--line);
}
.crumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--cyan);}
.crumb span.sep{color:var(--text-3);}
.crumb span.now{color:var(--text-3);}
.cat-hero h1{
  font-size:var(--fs-h1);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.01em;
  max-width:900px;
}
.cat-hero .lead{
  margin-top:18px;
  max-width:640px;
  font-size:16px;
  color:var(--text-2);
  line-height:1.85;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border:1px solid var(--line-2);
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  color:var(--text-2);
}
.tag-cyan{border-color:rgba(78,197,220,.45);color:var(--cyan);}
.tag-orange{border-color:rgba(242,101,34,.45);color:var(--orange-soft);}

/* ===================== stat band ===================== */
.stat-band{
  background:var(--panel);
  border-bottom:1px solid var(--line);
  padding:34px 0;
}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);}
.stat-item{background:var(--panel);padding:20px 18px;}
.stat-item .num{
  font-size:clamp(26px,3vw,40px);
  font-weight:800;
  font-variant-numeric:tabular-nums;
  color:var(--text);
  line-height:1.1;
}
.stat-item .num em{font-style:normal;font-size:.55em;color:var(--orange);margin-left:2px;}
.stat-item .lbl{margin-top:8px;font-size:12px;color:var(--text-3);letter-spacing:.02em;}
@media (min-width:900px){.stat-grid{grid-template-columns:repeat(4,1fr);}}

/* ===================== doc layout ===================== */
.doc-layout{padding:64px 0 24px;}
@media (min-width:1024px){.doc-layout{padding:96px 0 32px;}}

.sidebar{margin-bottom:36px;}
.toc-box{
  padding:24px;
  border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  box-shadow:var(--sh-dark);
}
.toc-title{
  font-size:12px;
  letter-spacing:.16em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:16px;
}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 12px;
  border-radius:8px;
  font-size:14px;
  color:var(--text-2);
  border:1px solid transparent;
  transition:background-color var(--t),color var(--t),border-color var(--t);
}
.toc-list a i{font-size:11px;color:var(--text-3);}
.toc-list a:hover{background:rgba(255,255,255,.06);color:var(--text);}
.toc-list a.is-active{
  color:var(--text);
  font-weight:700;
  border-color:rgba(242,101,34,.4);
  background:rgba(242,101,34,.08);
}
.toc-list a.is-active i{color:var(--orange);}

.toc-help{
  margin-top:18px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
  line-height:1.75;
}
.toc-help strong{color:var(--text-2);display:block;margin-bottom:6px;font-size:13px;}
.toc-help a{font-size:13px;}

@media (min-width:1024px){
  .sidebar-inner{position:sticky;top:96px;}
  .sidebar{margin-bottom:0;}
}
@media (max-width:1023px){
  .toc-box{
    display:flex;
    align-items:center;
    gap:10px;
    overflow-x:auto;
    padding:12px;
    border-radius:var(--r-md);
  }
  .toc-title{display:none;}
  .toc-list{flex-direction:row;gap:8px;flex-wrap:nowrap;}
  .toc-list a{
    white-space:nowrap;
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    padding:7px 16px;
    font-size:13px;
  }
  .toc-list a i{display:none;}
  .toc-help{display:none;}
}

/* ===================== content blocks ===================== */
.content-sec{padding:0 0 56px;scroll-margin-top:96px;}
.content-sec + .content-sec{border-top:1px solid var(--line);padding-top:56px;}
.content-sec h2{
  font-size:clamp(21px,2vw,28px);
  font-weight:700;
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.content-sec h2::before{
  content:"";
  width:4px;height:22px;
  border-radius:2px;
  background:var(--orange);
  flex:0 0 auto;
}
.content-sec > p{color:var(--text-2);font-size:15px;line-height:1.9;max-width:760px;}
.content-sec .sec-note{margin-top:12px;font-size:13px;color:var(--text-3);}

/* feature cards */
.feature-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:18px;
  margin-top:28px;
}
@media (min-width:700px){.feature-grid{grid-template-columns:repeat(2,1fr);}}
.f-card{
  padding:24px;
  border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
  height:100%;
}
.f-card:hover{
  transform:translateY(-3px);
  border-color:rgba(242,101,34,.45);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1),0 18px 40px rgba(0,0,0,.45);
}
.f-card .f-ico{
  width:42px;height:42px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;
  border:1px solid rgba(78,197,220,.4);
  color:var(--cyan);
  font-size:16px;
  margin-bottom:16px;
}
.f-card h3{font-size:18px;font-weight:700;line-height:1.45;}
.f-card p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.85;}
.f-card ul{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.f-card ul li{
  position:relative;
  padding-left:16px;
  font-size:13px;
  color:var(--text-3);
  line-height:1.7;
}
.f-card ul li::before{
  content:"";
  position:absolute;left:0;top:9px;
  width:5px;height:5px;
  border-radius:1px;
  background:var(--orange);
}

/* process */
.process{
  margin-top:32px;
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
  position:relative;
}
@media (min-width:760px){.process{grid-template-columns:repeat(4,1fr);gap:18px;}}
.step{
  position:relative;
  padding:24px 20px;
  border-radius:var(--r-md);
  background:var(--panel);
  border:1px solid var(--line);
  transition:border-color var(--t),transform var(--t);
}
.step:hover{border-color:rgba(78,197,220,.45);transform:translateY(-2px);}
.step .idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;
  font-size:13px;font-weight:800;
  color:var(--cyan);
  border:1px solid rgba(78,197,220,.5);
  border-radius:4px;
  margin-bottom:14px;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:16px;font-weight:700;}
.step p{margin-top:8px;font-size:13px;color:var(--text-3);line-height:1.8;}
.step::after{
  content:"";
  display:none;
}
@media (min-width:760px){
  .step::after{
    display:block;
    position:absolute;
    top:38px;right:-11px;
    width:12px;height:1px;
    background:rgba(78,197,220,.5);
  }
  .step:last-child::after{display:none;}
}

/* Q&A list */
.qa-list{margin-top:26px;border-top:1px solid var(--line);}
.qa-item{
  padding:24px 0;
  border-bottom:1px solid var(--line);
  transition:background-color var(--t);
}
.qa-item:hover{background:rgba(255,255,255,.02);}
.qa-q{
  display:flex;
  gap:12px;
  font-size:16px;
  font-weight:700;
  color:var(--text);
  line-height:1.6;
}
.qa-q .q-mark{
  flex:0 0 auto;
  color:var(--orange);
  font-weight:800;
  font-variant-numeric:tabular-nums;
}
.qa-a{
  margin-top:10px;
  padding-left:24px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.9;
}
.qa-a strong{color:var(--text);font-weight:600;}

/* doc rows */
.doc-list{margin-top:22px;border-top:1px solid var(--line);}
.doc-row{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:62px;
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  color:var(--text);
  border-radius:8px;
  transition:background-color var(--t),border-color var(--t);
}
.doc-row:hover{background:rgba(255,255,255,.05);color:var(--text);}
.doc-ico{
  flex:0 0 auto;
  width:34px;height:34px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:8px;
  border:1px solid var(--line-2);
  color:var(--cyan);
  font-size:14px;
}
.doc-name{
  flex:1 1 auto;
  font-size:15px;
  font-weight:600;
  line-height:1.5;
  min-width:0;
}
.doc-meta{
  flex:0 0 auto;
  font-size:12px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
  display:none;
}
@media (min-width:600px){.doc-meta{display:block;}}
.doc-go{
  flex:0 0 auto;
  color:var(--text-3);
  font-size:13px;
  transition:color var(--t),transform var(--t);
}
.doc-row:hover .doc-go{color:var(--orange);transform:translateX(3px);}

/* parts blocks */
.parts-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
  margin-top:26px;
}
@media (min-width:700px){.parts-grid{grid-template-columns:repeat(2,1fr);}}
.part{
  display:flex;
  gap:14px;
  padding:18px;
  border-radius:var(--r-md);
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  transition:border-color var(--t),background-color var(--t);
}
.part:hover{border-color:rgba(242,101,34,.4);background:rgba(255,255,255,.05);}
.part-ico{
  flex:0 0 auto;
  width:38px;height:38px;
  border-radius:9px;
  border:1px solid rgba(242,101,34,.4);
  color:var(--orange-soft);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;
}
.part h3{font-size:15px;font-weight:700;line-height:1.5;}
.part p{margin-top:6px;font-size:13px;color:var(--text-3);line-height:1.75;}

/* cycle rows (card-like, not原生表格) */
.cycle{margin-top:26px;display:flex;flex-direction:column;gap:10px;}
.cycle-row{
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:18px 20px;
  border-radius:var(--r-md);
  background:var(--panel);
  border:1px solid var(--line);
  transition:border-color var(--t),transform var(--t);
}
.cycle-row:hover{border-color:rgba(78,197,220,.4);transform:translateX(3px);}
.cycle-tag{
  flex:0 0 auto;
  min-width:64px;
  text-align:center;
  padding:5px 10px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:700;
  color:var(--orange-soft);
  border:1px solid rgba(242,101,34,.4);
  background:rgba(242,101,34,.08);
}
.cycle-main{flex:1 1 auto;min-width:0;}
.cycle-main h3{font-size:15px;font-weight:700;}
.cycle-main p{margin-top:6px;font-size:13px;color:var(--text-3);line-height:1.8;}
.cycle-owner{
  flex:0 0 auto;
  font-size:12px;
  color:var(--text-3);
  display:none;
}
@media (min-width:760px){.cycle-owner{display:block;min-width:96px;text-align:right;}}

/* image figure */
.fig-block{
  margin-top:30px;
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
  align-items:center;
}
@media (min-width:900px){.fig-block{grid-template-columns:5fr 6fr;gap:32px;}}
.fig-block figure{margin:0;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);position:relative;}
.fig-block figure img{aspect-ratio:16/10;width:100%;}
.fig-block figcaption{
  padding:10px 14px;
  font-size:12px;
  color:var(--text-3);
  background:var(--panel);
  border-top:1px solid var(--line);
}
.fig-block h3{font-size:var(--fs-h3);font-weight:700;}
.fig-block p{margin-top:12px;font-size:14px;color:var(--text-2);line-height:1.9;}
.fig-block ul{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.fig-block ul li{
  display:flex;gap:10px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.75;
}
.fig-block ul li i{color:var(--cyan);font-size:12px;margin-top:7px;flex:0 0 auto;}

/* ===================== CTA band ===================== */
.cta-band{
  position:relative;
  background:linear-gradient(180deg,#0F1A22,#0A1218);
  border-top:2px solid var(--orange);
  padding:64px 0;
  scroll-margin-top:80px;
}
.cta-inner{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:center;
}
@media (min-width:900px){.cta-inner{grid-template-columns:7fr 5fr;gap:48px;}}
.cta-band h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.3;}
.cta-band p{margin-top:14px;color:var(--text-2);font-size:15px;line-height:1.9;max-width:560px;}
.cta-form{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:24px;
  border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  box-shadow:var(--sh-dark);
}
.field{display:flex;flex-direction:column;gap:6px;}
.field label{font-size:12px;color:var(--text-3);letter-spacing:.02em;}
.field input,
.field select,
.field textarea{
  width:100%;
  min-height:44px;
  padding:11px 16px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  font-size:14px;
  color:var(--text);
  outline:0;
  transition:border-color var(--t),box-shadow var(--t),background-color var(--t);
}
.field input::placeholder,
.field textarea::placeholder{color:var(--text-3);}
.field input:focus,
.field select:focus,
.field textarea:focus{
  border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(78,197,220,.18);
  background:rgba(255,255,255,.06);
}

/* ===================== FAQ ===================== */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--t);
}
.faq-item[open]{border-color:rgba(78,197,220,.4);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  font-size:16px;
  font-weight:700;
  color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  font-size:20px;
  font-weight:400;
  color:var(--orange);
  transition:transform var(--t);
  line-height:1;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item .faq-body{
  padding:0 22px 20px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.9;
}

/* ===================== footer ===================== */
.site-footer{
  background:#070E13;
  border-top:1px solid rgba(242,101,34,.55);
  padding:64px 0 0;
  position:relative;
  z-index:1;
}
.footer-main{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  padding-bottom:48px;
}
@media (min-width:700px){.footer-main{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-main{grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;}}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{
  font-size:13px;
  color:var(--text-3);
  line-height:1.9;
  max-width:360px;
}
.footer-contact{margin-top:18px;display:flex;flex-direction:column;gap:9px;}
.footer-contact div{
  display:flex;gap:9px;
  font-size:13px;
  color:var(--text-2);
  line-height:1.6;
}
.footer-contact i{color:var(--cyan);font-size:12px;margin-top:5px;flex:0 0 auto;}
.footer-social{display:flex;gap:10px;margin-top:20px;}
.footer-social a{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  color:var(--text-2);
  font-size:14px;
  transition:border-color var(--t),color var(--t),background-color var(--t),transform var(--t);
}
.footer-social a:hover{
  border-color:rgba(242,101,34,.5);
  color:var(--orange-soft);
  background:rgba(242,101,34,.08);
  transform:translateY(-2px);
}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:var(--text);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{
  font-size:13px;
  color:var(--text-3);
  line-height:1.6;
  transition:color var(--t),padding-left var(--t);
}
.footer-col ul a:hover{color:var(--cyan);padding-left:4px;}
.footer-sub p{font-size:13px;color:var(--text-3);line-height:1.8;margin-bottom:16px;}
.footer-sub form{display:flex;flex-direction:column;gap:10px;}
.footer-sub .field input{background:rgba(255,255,255,.04);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.footer-bottom p{font-size:12px;color:var(--text-3);line-height:1.7;}
.back-top{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12px;
  color:var(--text-2);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:7px 14px;
  transition:border-color var(--t),color var(--t),transform var(--t);
}
.back-top:hover{border-color:rgba(242,101,34,.5);color:var(--orange-soft);transform:translateY(-2px);}

/* floating back to top */
.fab-top{
  position:fixed;
  right:20px;bottom:24px;
  width:46px;height:46px;
  border-radius:50%;
  border:1px solid var(--line-2);
  background:rgba(15,26,34,.9);
  backdrop-filter:blur(10px);
  color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity var(--t),visibility var(--t),transform var(--t),border-color var(--t),color var(--t);
  z-index:110;
}
.fab-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.fab-top:hover{border-color:var(--orange);color:var(--orange-soft);}

/* ===================== responsive fine tune ===================== */
@media (max-width:1023px){
  :root{--gap-sec:72px;}
  .cat-hero{padding:130px 0 48px;min-height:320px;}
}
@media (max-width:639px){
  :root{--gap-sec:56px;}
  body{font-size:15px;}
  .cat-hero{padding:118px 0 40px;}
  .cat-hero .lead{font-size:15px;}
  .section{padding:56px 0;}
  .content-sec{padding-bottom:44px;}
  .content-sec + .content-sec{padding-top:44px;}
  .step{padding:20px 16px;}
  .footer-main{padding-bottom:32px;}
  .cta-form{padding:18px;}
  .btn{width:100%;}
  .faq-item summary{font-size:15px;padding:16px 18px;}
  .fab-top{right:14px;bottom:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important;}
}