/* roulang page: index */
:root{
  --bg-900:#070B14;
  --bg-800:#0C1220;
  --bg-700:#111A2E;
  --glass:rgba(18,26,44,.55);
  --glass-strong:rgba(18,26,44,.78);
  --stroke:rgba(255,255,255,.08);
  --stroke-brand:rgba(22,224,192,.35);
  --brand:#16E0C0;
  --brand-deep:#0FB79C;
  --accent:#FFB020;
  --success:#2BD97C;
  --warn:#FF6B57;
  --ink-0:#F2F6FF;
  --ink-1:#C3CCE0;
  --ink-2:#8A96B0;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 18px 40px rgba(3,8,20,.45);
  --shadow-glow:0 12px 32px rgba(22,224,192,.18);
  --container:1240px;
  --t:220ms ease;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-num: "Inter", "DIN Alternate", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--ink-1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(22,224,192,.13), transparent 62%),
    radial-gradient(760px 460px at 88% 4%, rgba(255,176,32,.07), transparent 60%),
    radial-gradient(1000px 700px at 50% 110%, rgba(22,224,192,.06), transparent 65%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--t);}
a:hover{color:#7CF6E2;}
h1,h2,h3,h4{color:var(--ink-0);font-weight:700;margin:0 0 14px;letter-spacing:0;}
h1{font-size:clamp(30px,4.6vw,52px);line-height:1.22;}
h2{font-size:clamp(26px,3vw,36px);line-height:1.3;}
h3{font-size:clamp(19px,2vw,22px);line-height:1.4;}
p{margin:0 0 16px;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.wrap{max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.section{padding:96px 0;position:relative;z-index:1;}
.section--tight{padding:72px 0;}
.section--alt{background:linear-gradient(180deg,rgba(12,18,32,.85),rgba(7,11,20,.35));}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);font-weight:600;margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);opacity:.7;}
.lead{font-size:17px;color:var(--ink-1);max-width:760px;}
.sec-head{max-width:800px;margin-bottom:44px;}
.sec-head p{margin-bottom:0;color:var(--ink-2);}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(7,11,20,.62);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--stroke);
  transition:background var(--t),box-shadow var(--t);
}
.site-header.is-scrolled{
  background:rgba(7,11,20,.92);
  box-shadow:0 14px 34px rgba(2,6,16,.6);
}
.nav-inner{
  height:68px;display:flex;align-items:center;gap:26px;
}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--brand),#0A8E7C 70%);
  display:grid;place-items:center;
  color:#04120F;font-weight:800;font-size:15px;font-family:var(--font-num);
  box-shadow:0 0 0 1px rgba(22,224,192,.5), 0 8px 20px rgba(22,224,192,.28);
}
.brand-text{color:var(--ink-0);font-size:17px;font-weight:700;letter-spacing:.2px;}
.brand-text span{color:var(--brand);}
.nav-menu{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-menu a{
  position:relative;font-size:14px;color:var(--ink-1);padding:8px 12px;border-radius:8px;
  transition:color var(--t),background var(--t);
}
.nav-menu a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform 240ms ease;border-radius:2px;
}
.nav-menu a:hover{color:var(--ink-0);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.active{color:var(--ink-0);}
.nav-menu a.active::after{transform:scaleX(1);}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.cmd-search{
  position:relative;width:260px;display:flex;align-items:center;
  background:rgba(18,26,44,.7);border:1px solid var(--stroke);border-radius:12px;
  padding:0 10px 0 12px;height:40px;transition:border-color var(--t),box-shadow var(--t);
}
.cmd-search i{color:var(--ink-2);font-size:13px;}
.cmd-search input{
  flex:1;background:transparent;border:0;outline:0;color:var(--ink-0);
  font-size:14px;padding:0 8px;font-family:var(--font);
}
.cmd-search input::placeholder{color:var(--ink-2);}
.cmd-search:focus-within{border-color:var(--stroke-brand);box-shadow:0 0 0 3px rgba(22,224,192,.14);}
.kbd{
  font-family:var(--font-num);font-size:11px;color:var(--ink-2);
  border:1px solid var(--stroke);border-radius:6px;padding:2px 6px;
  background:rgba(255,255,255,.03);white-space:nowrap;
}
.icon-btn{
  width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  border:1px solid var(--stroke);background:rgba(18,26,44,.6);color:var(--ink-1);
  transition:all var(--t);
}
.icon-btn:hover{color:var(--ink-0);border-color:var(--stroke-brand);background:rgba(22,224,192,.10);}
.btn-main{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04120F;font-weight:700;font-size:14px;
  padding:11px 20px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.22);
  box-shadow:0 10px 26px rgba(22,224,192,.28);
  transition:transform var(--t),box-shadow var(--t),filter var(--t);
  white-space:nowrap;
}
.btn-main:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 16px 34px rgba(22,224,192,.4);color:#04120F;}
.btn-main:active{transform:translateY(0);}
.btn-main:disabled,.btn-main.disabled{opacity:.45;box-shadow:none;filter:none;transform:none;pointer-events:none;}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(18,26,44,.5);border:1px solid var(--stroke);color:var(--ink-0);
  font-weight:600;font-size:14px;padding:11px 20px;border-radius:var(--r-btn);
  transition:all var(--t);
}
.btn-ghost:hover{background:rgba(22,224,192,.10);border-color:var(--stroke-brand);color:var(--ink-0);transform:translateY(-2px);}
.btn-sm{padding:8px 15px;font-size:13px;}
.hamburger{
  display:none;width:42px;height:42px;border-radius:11px;
  border:1px solid var(--stroke);background:rgba(18,26,44,.6);color:var(--ink-0);
}
.drawer{
  background:var(--bg-800);color:var(--ink-1);border-left:1px solid var(--stroke);
}
.drawer .offcanvas-header{border-bottom:1px solid var(--stroke);padding:16px 20px;}
.drawer .offcanvas-title{font-size:15px;color:var(--ink-0);font-weight:700;}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-top:18px;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:44px;padding:10px 14px;border-radius:12px;color:var(--ink-1);font-size:15px;
  border:1px solid transparent;
}
.drawer-nav a:hover,.drawer-nav a.active{background:rgba(22,224,192,.10);border-color:var(--stroke-brand);color:var(--ink-0);}
.drawer-foot{margin-top:22px;}
.offcanvas{--bs-offcanvas-bg:var(--bg-800);}

/* ============ Hero ============ */
.hero{padding:76px 0 88px;position:relative;z-index:1;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero h1{margin-bottom:20px;}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-sub{font-size:17px;color:var(--ink-1);max-width:520px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.trust-bar{
  display:flex;flex-wrap:wrap;gap:18px;padding-top:22px;border-top:1px solid var(--stroke);
}
.trust-item{display:flex;flex-direction:column;gap:2px;padding-right:18px;border-right:1px solid var(--stroke);}
.trust-item:last-child{border-right:0;padding-right:0;}
.trust-item b{font-family:var(--font-num);font-size:19px;color:var(--ink-0);letter-spacing:.5px;}
.trust-item span{font-size:13px;color:var(--ink-2);}
.hero-visual{position:relative;}
.hero-visual::before{
  content:"";position:absolute;inset:-12% -8% -8% -8%;
  background:radial-gradient(closest-side,rgba(22,224,192,.28),transparent 72%);
  filter:blur(22px);z-index:0;
}
.hero-visual img{
  position:relative;z-index:1;width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:20px;border:1px solid var(--stroke);box-shadow:var(--shadow);
}
.float-card{
  position:absolute;z-index:2;background:var(--glass-strong);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border:1px solid var(--stroke);border-radius:16px;padding:14px 16px;
  box-shadow:var(--shadow);min-width:170px;
}
.float-card small{display:block;font-size:12px;color:var(--ink-2);}
.float-card b{font-family:var(--font-num);font-size:20px;color:var(--ink-0);display:block;line-height:1.4;}
.float-card--a{left:-26px;bottom:44px;}
.float-card--b{right:-18px;top:34px;}
.float-card .up{color:var(--brand);font-size:12px;font-family:var(--font-num);}

/* ============ 痛点 ============ */
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.pain-card{
  background:var(--glass);border:1px solid var(--stroke);border-radius:var(--r-card);
  padding:24px 22px;backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.pain-card:hover{transform:translateY(-4px);border-color:var(--stroke-brand);box-shadow:var(--shadow-glow);}
.pain-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(255,176,32,.10);color:var(--accent);border:1px solid rgba(255,176,32,.28);
  margin-bottom:16px;font-size:16px;
}
.pain-card h3{font-size:17px;margin-bottom:6px;}
.pain-card p{font-size:14px;color:var(--ink-2);margin:0;}

/* ============ 解决方案 ============ */
.solve-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:52px;align-items:center;}
.solve-img img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);border:1px solid var(--stroke);box-shadow:var(--shadow);}
.step-list{display:flex;flex-direction:column;gap:16px;margin-top:26px;}
.step{
  display:flex;gap:18px;padding:20px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--stroke);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.step:hover{border-color:var(--stroke-brand);transform:translateX(4px);box-shadow:var(--shadow-glow);}
.step-num{
  font-family:var(--font-num);font-size:15px;font-weight:700;color:var(--brand);
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(22,224,192,.10);border:1px solid var(--stroke-brand);
}
.step h3{font-size:17px;margin-bottom:4px;}
.step p{font-size:14px;color:var(--ink-2);margin:0;}

/* ============ 数据成果 ============ */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.metric{
  text-align:left;padding:28px 24px;border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(18,26,44,.7),rgba(12,18,32,.45));
  border:1px solid var(--stroke);position:relative;overflow:hidden;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.metric::after{
  content:"";position:absolute;right:-30px;top:-30px;width:110px;height:110px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(22,224,192,.22),transparent);
}
.metric:hover{transform:translateY(-4px);border-color:var(--stroke-brand);box-shadow:var(--shadow-glow);}
.metric b{
  font-family:var(--font-num);font-size:clamp(30px,3.4vw,42px);color:var(--ink-0);
  display:block;line-height:1.1;letter-spacing:1px;
}
.metric b i{font-style:normal;font-size:16px;color:var(--brand);margin-left:4px;}
.metric span{display:block;margin-top:10px;font-size:14px;color:var(--ink-2);}

/* ============ 证言 ============ */
.voice-track{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.voice-card{
  background:var(--glass);border:1px solid var(--stroke);border-radius:var(--r-card);
  padding:26px 24px;backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  display:flex;flex-direction:column;gap:16px;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.voice-card:hover{transform:translateY(-4px);border-color:var(--stroke-brand);box-shadow:var(--shadow-glow);}
.voice-quote{font-size:15px;color:var(--ink-1);margin:0;}
.voice-user{display:flex;align-items:center;gap:12px;margin-top:auto;}
.avatar{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(22,224,192,.9),rgba(15,183,156,.6));
  color:#04120F;font-weight:700;font-size:15px;
}
.voice-user b{display:block;font-size:14px;color:var(--ink-0);font-weight:600;}
.voice-user small{font-size:12px;color:var(--ink-2);}
.stars{color:var(--accent);font-size:12px;letter-spacing:2px;}

/* ============ 资讯列表 ============ */
.list-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:38px;flex-wrap:wrap;}
.list-head .more{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  background:var(--glass);border:1px solid var(--stroke);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--stroke-brand);box-shadow:var(--shadow-glow);}
.news-media{display:block;overflow:hidden;aspect-ratio:16/10;background:var(--bg-700);}
.news-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease;}
.news-card:hover .news-media img{transform:scale(1.02);}
.news-body{padding:20px 20px 18px;display:flex;flex-direction:column;gap:10px;flex:1;}
.tag{
  display:inline-flex;align-items:center;font-size:12px;padding:3px 10px;border-radius:999px;
  color:var(--brand);background:rgba(22,224,192,.10);border:1px solid var(--stroke-brand);
  width:fit-content;
}
.news-title{font-size:17px;line-height:1.5;margin:0;color:var(--ink-0);}
.news-title a{color:inherit;}
.news-title a:hover{color:var(--brand);}
.news-desc{
  font-size:14px;color:var(--ink-2);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--stroke);font-size:13px;color:var(--ink-2);
}
.news-meta a{font-weight:600;font-size:13px;}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 24px;border-radius:var(--r-card);
  border:1px dashed var(--stroke);background:rgba(18,26,44,.35);
}
.empty-state i{font-size:26px;color:var(--ink-2);display:block;margin-bottom:12px;}
.empty-state p{color:var(--ink-2);margin-bottom:16px;}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:start;}
.accordion-item{
  background:var(--glass);border:1px solid var(--stroke);border-radius:14px;
  margin-bottom:14px;overflow:hidden;
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
}
.accordion-button{
  background:transparent;color:var(--ink-0);font-size:16px;font-weight:600;
  padding:18px 52px 18px 22px;border:0;box-shadow:none;
}
.accordion-button:not(.collapsed){color:var(--brand);background:rgba(22,224,192,.06);}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-button::after{
  background-image:none;content:"\2b";font-family:var(--font);font-weight:600;
  color:var(--brand);font-size:20px;position:absolute;right:20px;top:50%;
  transform:translateY(-50%);width:auto;height:auto;line-height:1;
  transition:transform 240ms ease;
}
.accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(45deg);}
.accordion-button:not(.collapsed){box-shadow:inset 3px 0 0 var(--brand);}
.accordion-body{color:var(--ink-2);font-size:15px;padding:0 22px 20px;line-height:1.85;}

/* ============ CTA ============ */
.cta-panel{
  position:relative;overflow:hidden;border-radius:22px;
  background:linear-gradient(135deg,rgba(18,26,44,.92),rgba(10,16,30,.85));
  border:1px solid var(--stroke-brand);
  box-shadow:0 0 0 1px rgba(22,224,192,.16), 0 28px 60px rgba(2,8,20,.6);
  padding:56px 52px;display:grid;grid-template-columns:1.3fr .7fr;gap:32px;align-items:center;
}
.cta-panel::before{
  content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(22,224,192,.35),transparent 70%);
}
.cta-panel::after{
  content:"";position:absolute;right:24px;bottom:16px;width:150px;height:150px;
  background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;
}
.cta-panel h2{margin-bottom:12px;position:relative;z-index:1;}
.cta-panel p{color:var(--ink-2);margin-bottom:0;position:relative;z-index:1;max-width:640px;}
.cta-action{position:relative;z-index:1;display:flex;justify-content:flex-end;}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--stroke);background:rgba(7,11,20,.9);
  padding:64px 0 0;margin-top:20px;position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;padding-bottom:44px;}
.footer-brand p{font-size:14px;color:var(--ink-2);margin-top:14px;max-width:320px;}
.footer-col h4{font-size:14px;color:var(--ink-0);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--ink-2);}
.footer-col a:hover{color:var(--brand);}
.footer-contact li{font-size:13.5px;color:var(--ink-2);display:flex;gap:10px;align-items:flex-start;}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:12px;}
.footer-bottom{
  border-top:1px solid var(--stroke);padding:20px 0;display:flex;flex-wrap:wrap;
  gap:12px;justify-content:space-between;align-items:center;font-size:13px;color:var(--ink-2);
}
.footer-bottom a{color:var(--ink-2);}
.footer-bottom a:hover{color:var(--brand);}

@media (min-width:1400px){
  .hero-grid{gap:64px;}
}
@media (max-width:1199.98px){
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-visual{max-width:640px;}
  .float-card--a{left:-8px;bottom:20px;}
  .float-card--b{right:-6px;top:18px;}
  .pain-grid,.metric-grid{grid-template-columns:repeat(2,1fr);}
  .solve-grid{grid-template-columns:1fr;gap:36px;}
  .faq-grid{grid-template-columns:1fr;gap:28px;}
  .cta-panel{grid-template-columns:1fr;padding:44px 36px;}
  .cta-action{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:991.98px){
  .nav-menu{display:none;}
  .cmd-search{display:none;}
  .nav-right .icon-btn{display:none;}
  .hamburger{display:grid;place-items:center;}
  .nav-inner{gap:14px;}
  .voice-track{grid-template-columns:1fr;gap:18px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:767.98px){
  .section{padding:64px 0;}
  .section--tight{padding:52px 0;}
  .wrap{padding:0 18px;}
  .hero{padding:48px 0 60px;}
  .hero-sub{font-size:16px;}
  .pain-grid,.metric-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .trust-bar{gap:14px;}
  .trust-item{padding-right:14px;}
  .cta-panel{padding:34px 22px;border-radius:18px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .float-card{position:static;margin-top:14px;min-width:0;}
  .float-card--a,.float-card--b{left:auto;right:auto;}
  .hero-visual::before{filter:blur(28px);}
}
@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn-main,.hero-actions .btn-ghost{justify-content:center;}
  .brand-text{font-size:15px;}
  h1{font-size:27px;}
  .metric b{font-size:30px;}
}

/* roulang page: article */
:root{
  --bg-900:#070B14;
  --bg-800:#0C1220;
  --glass:rgba(18,26,44,.55);
  --glass-strong:rgba(18,26,44,.78);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#16E0C0;
  --brand-deep:#0FB79C;
  --accent:#FFB020;
  --ok:#2BD97C;
  --warn:#FF6B57;
  --ink-0:#F2F6FF;
  --ink-1:#C3CCE0;
  --ink-2:#8A96B0;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 18px 40px rgba(3,8,20,.45);
  --shadow-hover:0 0 0 1px rgba(22,224,192,.35), 0 12px 32px rgba(22,224,192,.18);
  --wrap:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background-color:var(--bg-900);
  background-image:
    radial-gradient(920px 520px at 12% -8%, rgba(22,224,192,.10), transparent 60%),
    radial-gradient(760px 460px at 92% 6%, rgba(255,176,32,.06), transparent 62%),
    radial-gradient(640px 420px at 50% 108%, rgba(22,224,192,.06), transparent 64%);
  background-repeat:no-repeat;
  color:var(--ink-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  min-height:100vh;
}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:#5BF2DA;}
img{max-width:100%;display:block;}
button,input{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink-0);font-weight:700;margin:0;letter-spacing:0;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:rgba(22,224,192,.3);color:#fff;}
:focus-visible{outline:2px solid rgba(22,224,192,.75);outline-offset:2px;}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(7,11,20,.72);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .22s ease,box-shadow .22s ease;
}
.site-header.scrolled{background:rgba(6,10,18,.94);box-shadow:0 10px 30px rgba(3,8,20,.6);}
.header-inner{display:flex;align-items:center;gap:18px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#04140F;font-weight:800;font-size:14px;letter-spacing:.02em;
  box-shadow:0 0 0 1px rgba(22,224,192,.5), 0 8px 22px rgba(22,224,192,.28);
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink-0);line-height:1.2;}
.brand-text span{display:block;font-size:11px;font-weight:500;color:var(--ink-2);letter-spacing:.06em;}
.nav-menu{display:flex;align-items:center;gap:4px;margin:0 auto;}
.nav-menu a{
  position:relative;font-size:14px;color:var(--ink-2);padding:9px 12px;border-radius:9px;
  transition:color .2s ease,background .2s ease;
}
.nav-menu a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-deep));
  transform:scaleX(0);transform-origin:left;transition:transform .24s ease;
}
.nav-menu a:hover{color:var(--ink-0);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.active{color:var(--brand);}
.nav-menu a.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.cmd-search{
  display:flex;align-items:center;gap:8px;width:260px;height:38px;padding:0 10px;
  background:rgba(18,26,44,.7);border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search i{color:var(--ink-2);font-size:13px;}
.cmd-search input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--ink-0);font-size:13.5px;}
.cmd-search input::placeholder{color:var(--ink-2);}
.cmd-search:focus-within{border-color:rgba(22,224,192,.55);box-shadow:0 0 0 3px rgba(22,224,192,.14);background:rgba(18,26,44,.9);}
.kbd{font-size:11px;color:var(--ink-2);border:1px solid var(--line);border-radius:6px;padding:1px 6px;white-space:nowrap;}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;border:1px solid var(--line);background:rgba(18,26,44,.5);
  color:var(--ink-1);font-size:14px;transition:all .2s ease;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(22,224,192,.45);background:rgba(22,224,192,.08);}
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--r-btn);border:1px solid rgba(22,224,192,.55);
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04140F;font-size:14px;font-weight:700;line-height:1;
  box-shadow:0 0 0 1px rgba(22,224,192,.24), 0 10px 26px rgba(22,224,192,.26);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.btn-glow:hover{color:#04140F;filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(22,224,192,.4), 0 16px 34px rgba(22,224,192,.3);}
.btn-glow:active{transform:translateY(1px);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--r-btn);border:1px solid var(--line-strong);
  background:rgba(18,26,44,.45);color:var(--ink-1);font-size:14px;font-weight:600;line-height:1;
  transition:all .2s ease;
}
.btn-ghost:hover{color:var(--ink-0);background:rgba(22,224,192,.10);border-color:rgba(22,224,192,.45);transform:translateY(-2px);}
.hamburger{
  display:none;width:40px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:rgba(18,26,44,.6);color:var(--ink-1);align-items:center;justify-content:center;font-size:16px;
}
.hamburger:hover{color:var(--brand);border-color:rgba(22,224,192,.45);}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(4,8,16,.7);opacity:0;visibility:hidden;transition:all .24s ease;z-index:1040;}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);z-index:1050;
  background:linear-gradient(180deg,rgba(12,18,32,.98),rgba(7,11,20,.99));
  border-left:1px solid var(--line);padding:20px;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;gap:16px;overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--ink-1);}
.drawer-search{width:100%;}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-top:4px;}
.drawer-nav a{
  display:flex;align-items:center;height:44px;padding:0 14px;border-radius:12px;
  border:1px solid transparent;color:var(--ink-1);font-size:15px;background:rgba(18,26,44,.4);
}
.drawer-nav a.active{border-color:rgba(22,224,192,.4);color:var(--brand);background:rgba(22,224,192,.08);}
.drawer-cta{margin-top:auto;}

/* ---------- page head ---------- */
.page-head{
  position:relative;padding:52px 0 40px;border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(7,11,20,.82),rgba(7,11,20,.96)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:18px;}
.crumbs a{color:var(--ink-2);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{opacity:.5;}
.crumbs .current{color:var(--ink-1);}
.page-title{
  font-size:clamp(26px,3.4vw,40px);line-height:1.3;max-width:900px;margin-bottom:20px;
}
.meta-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-size:13px;color:var(--ink-2);padding-top:16px;border-top:1px dashed var(--line);
}
.meta-bar i{margin-right:6px;color:var(--brand);opacity:.85;}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;padding:3px 12px;border-radius:999px;
  font-size:12px;color:var(--brand);border:1px solid rgba(22,224,192,.4);background:rgba(22,224,192,.09);
}

/* ---------- layout ---------- */
.main{padding:56px 0 72px;}
.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 292px;gap:48px;justify-content:center;align-items:start;
}
.article-body{
  font-size:16px;line-height:1.85;color:var(--ink-1);
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:34px 36px;box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%);
  word-break:break-word;
}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;margin:38px 0 14px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-deep));
}
.article-body h3{font-size:19px;line-height:1.5;margin:26px 0 10px;}
.article-body h2:first-child,.article-body h3:first-child{margin-top:0;}
.article-body p{margin:0 0 1.25em;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(22,224,192,.35);}
.article-body a:hover{border-bottom-color:var(--brand);}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.25em;list-style:revert;}
.article-body li{margin:.42em 0;}
.article-body blockquote{
  margin:22px 0;padding:18px 22px;border-radius:var(--r-btn);
  background:var(--glass-strong);border-left:3px solid var(--brand);color:var(--ink-1);
}
.article-body img{border-radius:var(--r-img);margin:18px 0;height:auto;}
.article-body figure{margin:20px 0;}
.article-body figcaption{font-size:13px;color:var(--ink-2);text-align:center;margin-top:8px;}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top;}
.article-body th{background:rgba(22,224,192,.08);color:var(--ink-0);font-weight:600;}
.article-body tr:nth-child(even) td{background:rgba(255,255,255,.015);}
.article-body code{
  background:rgba(22,224,192,.1);color:var(--brand);padding:2px 6px;border-radius:6px;font-size:14px;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:30px 0;}

/* ---------- sidebar ---------- */
.side-panel{
  position:sticky;top:92px;display:flex;flex-direction:column;gap:18px;
}
.side-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%);
}
.side-card h4{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h4 i{color:var(--brand);font-size:13px;}
.side-links{display:flex;flex-direction:column;gap:4px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:10px;font-size:13.5px;color:var(--ink-1);
  border:1px solid transparent;background:rgba(18,26,44,.4);transition:all .2s ease;
}
.side-links a:hover{color:var(--ink-0);border-color:rgba(22,224,192,.4);background:rgba(22,224,192,.1);transform:translateX(2px);}
.side-links a i{color:var(--brand);font-size:11px;opacity:.7;}
.side-note{font-size:13px;color:var(--ink-2);line-height:1.7;}

/* ---------- empty ---------- */
.empty-state{
  text-align:center;padding:64px 28px;border:1px dashed var(--line-strong);border-radius:var(--r-card);
  background:var(--glass);
}
.empty-state i{font-size:34px;color:var(--brand);opacity:.8;}
.empty-state h3{font-size:20px;margin:18px 0 10px;}
.empty-state p{color:var(--ink-2);font-size:14.5px;}

/* ---------- related ---------- */
.section{padding:0 0 72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.section-head h2{font-size:26px;line-height:1.3;}
.section-head p{font-size:14px;color:var(--ink-2);margin:8px 0 0;}
.link-more{font-size:13.5px;color:var(--brand);white-space:nowrap;}
.link-more:hover{color:#5BF2DA;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.news-card{
  display:flex;flex-direction:column;background:var(--glass);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  -webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(22,224,192,.35);}
.news-thumb{aspect-ratio:16/10;width:100%;object-fit:cover;transition:transform .35s ease;}
.news-card:hover .news-thumb{transform:scale(1.02);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body h3 a{color:var(--ink-0);}
.news-body h3 a:hover{color:var(--brand);}
.news-body p{font-size:13.5px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0;}
.news-foot{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--ink-2);padding-top:12px;border-top:1px solid var(--line);margin-top:auto;}

/* ---------- faq ---------- */
.accordion-item{
  background:var(--glass);border:1px solid var(--line) !important;border-radius:var(--r-btn) !important;
  margin-bottom:12px;overflow:hidden;
}
.accordion-button{
  background:transparent !important;color:var(--ink-0) !important;font-size:15.5px;font-weight:600;
  box-shadow:none !important;padding:18px 22px;
}
.accordion-button:not(.collapsed){color:var(--brand) !important;}
.accordion-button::after{
  width:14px;height:14px;background-size:14px;
  filter:invert(78%) sepia(41%) saturate(1234%) hue-rotate(120deg);
  transition:transform .22s ease;
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.accordion-body{color:var(--ink-1);font-size:14.5px;line-height:1.8;padding:0 22px 20px;}

/* ---------- cta ---------- */
.cta-panel{
  position:relative;overflow:hidden;border-radius:24px;padding:52px 40px;text-align:center;
  border:1px solid rgba(22,224,192,.28);
  background:
    radial-gradient(600px 320px at 18% 0%, rgba(22,224,192,.16), transparent 62%),
    radial-gradient(520px 320px at 88% 100%, rgba(255,176,32,.10), transparent 62%),
    var(--glass-strong);
  box-shadow:0 0 0 1px rgba(22,224,192,.12), 0 24px 60px rgba(3,8,20,.55);
  -webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%);
}
.cta-panel::after{
  content:"";position:absolute;top:-40px;right:-40px;width:200px;height:200px;
  background-image:linear-gradient(rgba(22,224,192,.22) 1px,transparent 1px),linear-gradient(90deg,rgba(22,224,192,.22) 1px,transparent 1px);
  background-size:22px 22px;opacity:.4;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 70% 30%,#000,transparent 72%);
}
.cta-panel h2{font-size:clamp(22px,3vw,32px);margin-bottom:14px;}
.cta-panel p{max-width:640px;margin:0 auto 26px;color:var(--ink-2);font-size:15px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:24px;}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;font-size:12.5px;
  color:var(--ink-1);border:1px solid var(--line);background:rgba(18,26,44,.55);transition:all .2s ease;
}
.tag:hover{color:var(--brand);border-color:rgba(22,224,192,.45);background:rgba(22,224,192,.1);}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:rgba(6,10,18,.9);padding:56px 0 0;margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:40px;}
.footer-brand p{font-size:13.5px;color:var(--ink-2);line-height:1.8;margin:18px 0 0;max-width:340px;}
.footer-col h4{font-size:14px;margin-bottom:16px;color:var(--ink-0);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--ink-2);}
.footer-col a:hover{color:var(--brand);}
.footer-contact li{display:flex;gap:10px;font-size:13.5px;color:var(--ink-2);line-height:1.7;}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:12px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  border-top:1px solid var(--line);padding:20px 0 26px;font-size:13px;color:var(--ink-2);
}
.footer-bottom a{color:var(--ink-2);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- responsive ---------- */
@media (max-width:1399.98px){
  .article-layout{grid-template-columns:minmax(0,1fr) 268px;gap:36px;}
}
@media (max-width:1199.98px){
  .article-layout{grid-template-columns:minmax(0,760px);gap:0;}
  .side-panel{display:none;}
}
@media (max-width:991.98px){
  .nav-menu,.cmd-search,.header-actions .icon-btn{display:none;}
  .hamburger{display:inline-flex;}
  .header-inner{gap:12px;}
  .brand{margin-right:auto;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .page-head{padding:40px 0 32px;}
  .main{padding:40px 0 56px;}
  .article-body{padding:26px 22px;}
  .section{padding:0 0 56px;}
}
@media (max-width:767.98px){
  .wrap{padding:0 18px;}
  .brand-text{font-size:15px;}
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .cta-panel{padding:36px 22px;border-radius:20px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .meta-bar{gap:8px 16px;}
}
@media (max-width:575.98px){
  .article-body{padding:22px 16px;border-radius:16px;font-size:15.5px;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:17px;}
  .page-title{font-size:24px;}
  .btn-glow,.btn-ghost{padding:10px 16px;font-size:13.5px;}
}

/* roulang page: category1 */
:root{
  --bg-900:#070B14;
  --bg-800:#0C1220;
  --bg-700:#111A2C;
  --brand:#16E0C0;
  --brand-deep:#0FB79C;
  --accent:#FFB020;
  --ok:#2BD97C;
  --warn:#FF6B57;
  --ink-0:#F2F6FF;
  --ink-1:#C3CCE0;
  --ink-2:#8A96B0;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --glass:rgba(18,26,44,.55);
  --glass-2:rgba(18,26,44,.78);
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --shadow:0 18px 40px rgba(3,8,20,.45);
  --shadow-hover:0 0 0 1px rgba(22,224,192,.35),0 12px 32px rgba(22,224,192,.18);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter","DIN Alternate","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-1);
  background-color:var(--bg-900);
  background-image:
    radial-gradient(900px 520px at 10% -10%,rgba(22,224,192,.10),transparent 62%),
    radial-gradient(780px 460px at 94% 2%,rgba(255,176,32,.07),transparent 64%),
    linear-gradient(180deg,#070B14 0%,#080D18 42%,#070B14 100%);
  background-repeat:no-repeat;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4{color:var(--ink-0);font-weight:700;letter-spacing:0;margin:0;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(7,11,20,.72);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid var(--line);
  transition:background .24s ease,box-shadow .24s ease;
}
.site-header.scrolled{background:rgba(7,11,20,.94);box-shadow:0 14px 34px rgba(3,8,20,.6);}
.nav-inner{display:flex;align-items:center;gap:26px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:14px;font-weight:800;letter-spacing:.5px;
  color:#04140F;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  box-shadow:0 0 0 1px rgba(255,255,255,.18) inset,0 8px 20px rgba(22,224,192,.28);
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink-0);line-height:1.2;display:flex;flex-direction:column;}
.brand-text span{font-size:11px;font-weight:500;color:var(--ink-2);letter-spacing:.5px;}
.nav-menu{display:flex;align-items:center;gap:22px;}
.nav-menu a{
  position:relative;font-size:14px;color:var(--ink-1);padding:6px 0;white-space:nowrap;
  transition:color .2s ease;
}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-deep));
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-menu a:hover{color:var(--ink-0);}
.nav-menu a:hover::after{transform:scaleX(1);}
.nav-menu a.active{color:var(--ink-0);font-weight:600;}
.nav-menu a.active::after{transform:scaleX(1);}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.cmd-search{
  display:flex;align-items:center;gap:8px;width:260px;height:38px;padding:0 10px;
  border-radius:var(--r-sm);border:1px solid var(--line);
  background:rgba(12,18,32,.7);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.cmd-search i{color:var(--ink-2);font-size:13px;}
.cmd-search input{
  flex:1;min-width:0;border:0;background:transparent;color:var(--ink-0);font-size:13px;outline:none;
}
.cmd-search input::placeholder{color:var(--ink-2);}
.cmd-search:focus-within{border-color:rgba(22,224,192,.6);box-shadow:0 0 0 3px rgba(22,224,192,.16);background:rgba(12,18,32,.95);}
.kbd{
  font-size:11px;color:var(--ink-2);border:1px solid var(--line-2);border-radius:6px;
  padding:1px 6px;line-height:1.6;white-space:nowrap;
}
.icon-btn{
  width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  color:var(--ink-1);border:1px solid var(--line);background:rgba(12,18,32,.6);
  transition:all .2s ease;
}
.icon-btn:hover{color:var(--ink-0);border-color:rgba(22,224,192,.5);background:rgba(22,224,192,.10);}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border:0;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;color:#04140F;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:0 0 0 1px rgba(255,255,255,.14) inset,0 10px 26px rgba(22,224,192,.28);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.btn-main:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.2) inset,0 16px 34px rgba(22,224,192,.36);color:#04140F;}
.btn-main:active{transform:translateY(1px);}
.btn-main.btn-sm{padding:9px 18px;font-size:14px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-sm);font-size:15px;font-weight:600;
  color:var(--ink-0);background:rgba(255,255,255,.03);
  border:1px solid var(--line-2);cursor:pointer;
  transition:all .2s ease;
}
.btn-ghost:hover{background:rgba(22,224,192,.10);border-color:rgba(22,224,192,.45);color:var(--ink-0);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.burger{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:rgba(12,18,32,.6);cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;margin-left:auto;}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-1);transition:all .2s ease;}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(3,6,14,.6);backdrop-filter:blur(2px);opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:1050;}
.drawer-mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:1060;
  background:var(--bg-800);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;padding:18px;gap:14px;overflow-y:auto;
}
.drawer.show{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--ink-1);cursor:pointer;}
.drawer .cmd-search{width:100%;}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{
  display:flex;align-items:center;height:44px;padding:0 12px;border-radius:10px;
  font-size:15px;color:var(--ink-1);border:1px solid transparent;
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--ink-0);background:rgba(22,224,192,.10);border-color:rgba(22,224,192,.28);}
.drawer-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);}
.drawer-foot .btn-main{width:100%;}

/* ---------- hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero-media{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center 32%;
  opacity:.5;
}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.72) 0%,rgba(7,11,20,.86) 55%,var(--bg-900) 100%);
}
.hero-inner{position:relative;padding:64px 24px 72px;max-width:1240px;margin:0 auto;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:22px;flex-wrap:wrap;}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand);}
.crumb em{font-style:normal;color:var(--ink-1);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:1px;color:var(--brand);
  border:1px solid rgba(22,224,192,.35);background:rgba(22,224,192,.08);
  border-radius:999px;padding:5px 14px;margin-bottom:20px;
}
.page-hero h1{
  font-size:clamp(28px,4.2vw,46px);line-height:1.28;max-width:900px;margin-bottom:18px;
}
.hero-lead{font-size:17px;color:var(--ink-1);max-width:720px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-metrics{display:flex;flex-wrap:wrap;gap:0;border-top:1px solid var(--line);padding-top:22px;max-width:760px;}
.hero-metrics li{display:flex;flex-direction:column;gap:2px;padding-right:34px;margin-right:34px;border-right:1px solid var(--line);}
.hero-metrics li:last-child{border-right:0;margin-right:0;padding-right:0;}
.hero-metrics b{font-family:var(--font-num);font-size:26px;color:var(--brand);line-height:1.2;}
.hero-metrics span{font-size:13px;color:var(--ink-2);}

/* ---------- sections ---------- */
.section{padding:84px 0;}
.section.alt{background:rgba(12,18,32,.42);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head h2{font-size:clamp(24px,3vw,34px);line-height:1.35;margin-bottom:14px;}
.sec-head p{color:var(--ink-2);font-size:15.5px;margin:0;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;color:var(--brand);border:1px solid rgba(22,224,192,.35);
  background:rgba(22,224,192,.08);border-radius:999px;padding:3px 12px;margin-bottom:14px;
}
.tag.amber{color:var(--accent);border-color:rgba(255,176,32,.4);background:rgba(255,176,32,.08);}

/* ---------- card wall ---------- */
.card-wall{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.feature-card{
  display:flex;gap:0;overflow:hidden;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(22,224,192,.35);box-shadow:var(--shadow-hover);}
.feature-card .fc-media{flex:0 0 42%;aspect-ratio:4/5;overflow:hidden;}
.feature-card .fc-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.feature-card:hover .fc-media img{transform:scale(1.04);}
.feature-card .fc-body{padding:24px;display:flex;flex-direction:column;gap:10px;}
.feature-card h3{font-size:19px;line-height:1.45;}
.feature-card p{font-size:14.5px;color:var(--ink-2);margin:0;}
.fc-list{display:flex;flex-direction:column;gap:6px;margin-top:4px;}
.fc-list li{position:relative;padding-left:16px;font-size:13.5px;color:var(--ink-1);}
.fc-list li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--brand);opacity:.85;}

/* ---------- metric strip ---------- */
.metric-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.metric{
  padding:26px 22px;border-radius:var(--r-lg);
  background:rgba(18,26,44,.5);border:1px solid rgba(22,224,192,.22);
  box-shadow:0 0 0 1px rgba(22,224,192,.05),0 16px 34px rgba(3,8,20,.4);
  transition:transform .22s ease,box-shadow .22s ease;
}
.metric:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.metric b{display:block;font-family:var(--font-num);font-size:32px;color:var(--accent);line-height:1.15;}
.metric span{display:block;font-size:14px;color:var(--ink-1);margin-top:6px;}
.metric em{display:block;font-style:normal;font-size:12.5px;color:var(--ink-2);margin-top:2px;}

/* ---------- scene grid ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.scene{
  padding:26px;border-radius:var(--r-lg);background:var(--glass);
  border:1px solid var(--line);box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.scene:hover{transform:translateY(-4px);border-color:rgba(22,224,192,.35);box-shadow:var(--shadow-hover);}
.scene .sc-icon{
  width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(22,224,192,.12);border:1px solid rgba(22,224,192,.3);color:var(--brand);
  font-size:17px;margin-bottom:16px;
}
.scene h3{font-size:18px;margin-bottom:8px;}
.scene p{font-size:14.5px;color:var(--ink-2);margin:0;}

/* ---------- steps ---------- */
.step-list{display:flex;flex-direction:column;gap:18px;counter-reset:step;}
.step{
  display:flex;gap:20px;align-items:flex-start;
  padding:24px 26px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);box-shadow:var(--shadow);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.step:hover{transform:translateY(-3px);border-color:rgba(22,224,192,.35);box-shadow:var(--shadow-hover);}
.step-no{
  flex:0 0 46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:18px;font-weight:700;color:var(--brand);
  background:rgba(22,224,192,.08);border:1px solid rgba(22,224,192,.3);
}
.step-body h3{font-size:18px;margin-bottom:6px;}
.step-body p{font-size:14.5px;color:var(--ink-2);margin:0;}

/* ---------- faq ---------- */
.accordion{--bs-accordion-bg:transparent;--bs-accordion-transparent-bg:transparent;--bs-accordion-border-width:0;--bs-accordion-border-radius:var(--r-sm);--bs-accordion-inner-border-radius:var(--r-sm);--bs-accordion-btn-focus-box-shadow:none;--bs-accordion-body-padding-y:0;--bs-accordion-body-padding-x:0;--bs-accordion-active-bg:transparent;--bs-accordion-active-color:var(--ink-0);--bs-accordion-color:var(--ink-1);}
.accordion-item{
  background:var(--glass)!important;border:1px solid var(--line)!important;border-radius:var(--r-sm)!important;
  margin-bottom:12px;overflow:hidden;
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.accordion-item:hover{border-color:rgba(22,224,192,.3)!important;}
.accordion-button{
  background:transparent!important;color:var(--ink-0)!important;font-size:16px;font-weight:600;
  padding:18px 22px;box-shadow:none!important;gap:12px;
}
.accordion-button::after{display:none;}
.accordion-button .plus{
  margin-left:auto;flex:0 0 22px;width:22px;height:22px;position:relative;
  transition:transform .24s ease;
}
.accordion-button .plus::before,.accordion-button .plus::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.accordion-button .plus::before{left:0;top:10px;width:22px;height:2px;}
.accordion-button .plus::after{left:10px;top:0;width:2px;height:22px;transition:opacity .2s ease;}
.accordion-button:not(.collapsed){color:var(--brand)!important;}
.accordion-button:not(.collapsed) .plus{transform:rotate(45deg);}
.accordion-item:has(.accordion-button:not(.collapsed)){border-left:3px solid var(--brand);}
.accordion-body{padding:0 22px 22px;font-size:14.5px;color:var(--ink-2);}

/* ---------- related tags ---------- */
.relate{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;font-size:14px;
  color:var(--ink-1);background:rgba(255,255,255,.03);border:1px solid var(--line-2);
  transition:all .2s ease;
}
.pill:hover{color:var(--ink-0);border-color:rgba(22,224,192,.5);background:rgba(22,224,192,.10);transform:translateY(-2px);}

/* ---------- cta ---------- */
.cta-panel{
  position:relative;overflow:hidden;border-radius:22px;padding:52px 44px;
  background:linear-gradient(135deg,rgba(22,224,192,.12),rgba(18,26,44,.72) 55%);
  border:1px solid rgba(22,224,192,.3);
  box-shadow:0 0 0 1px rgba(22,224,192,.08),0 24px 56px rgba(3,8,20,.5);
}
.cta-panel::before{
  content:"";position:absolute;top:-90px;right:-70px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,192,.28),transparent 68%);
  pointer-events:none;
}
.cta-grid{
  position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(circle at 88% 12%,#000,transparent 62%);
  mask-image:radial-gradient(circle at 88% 12%,#000,transparent 62%);
}
.cta-body{position:relative;max-width:640px;}
.cta-body h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px;}
.cta-body p{color:var(--ink-1);font-size:15.5px;margin-bottom:26px;}

/* ---------- footer ---------- */
.site-footer{margin-top:20px;border-top:1px solid var(--line);background:rgba(7,11,20,.86);padding:60px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:42px;}
.footer-brand p{font-size:13.5px;color:var(--ink-2);margin-top:16px;max-width:300px;}
.footer-col h4{font-size:14px;color:var(--ink-0);margin-bottom:16px;letter-spacing:.5px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:13.5px;color:var(--ink-2);}
.footer-col ul a:hover{color:var(--brand);}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--ink-2);}
.footer-contact i{color:var(--brand);margin-top:5px;font-size:13px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  border-top:1px solid var(--line);padding:20px 0 26px;font-size:13px;color:var(--ink-2);
}
.footer-bottom a{color:var(--ink-2);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .cmd-search{width:200px;}
  .nav-menu{gap:16px;}
  .nav-menu a{font-size:13.5px;}
}
@media (max-width:991.98px){
  .nav-menu,.nav-tools .cmd-search,.nav-tools .icon-btn{display:none;}
  .burger{display:flex;}
  .nav-tools{margin-left:auto;}
  .nav-inner{gap:14px;}
  .section{padding:60px 0;}
  .card-wall{grid-template-columns:1fr;}
  .metric-strip{grid-template-columns:repeat(2,1fr);}
  .scene-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .hero-inner{padding:48px 24px 56px;}
}
@media (max-width:767.98px){
  .wrap{padding:0 18px;}
  .hero-metrics li{padding-right:22px;margin-right:22px;}
  .feature-card{flex-direction:column;}
  .feature-card .fc-media{flex:none;width:100%;aspect-ratio:16/10;}
  .scene-grid{grid-template-columns:1fr;}
  .cta-panel{padding:36px 24px;}
  .step{flex-direction:column;gap:14px;}
}
@media (max-width:520px){
  .metric-strip{grid-template-columns:1fr;}
  .hero-metrics{flex-direction:column;gap:18px;}
  .hero-metrics li{border-right:0;padding-right:0;margin-right:0;padding-bottom:14px;border-bottom:1px solid var(--line);width:100%;}
  .hero-metrics li:last-child{border-bottom:0;padding-bottom:0;}
  .footer-grid{grid-template-columns:1fr;}
  .btn-main,.btn-ghost{width:100%;}
  .hero-actions{gap:10px;}
}

/* roulang page: category2 */
:root{
  --bg-900:#070B14;
  --bg-800:#0C1220;
  --glass:rgba(18,26,44,.55);
  --glass-2:rgba(18,26,44,.78);
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --brand:#16E0C0;
  --brand-deep:#0FB79C;
  --accent:#FFB020;
  --ok:#2BD97C;
  --warn:#FF6B57;
  --ink-0:#F2F6FF;
  --ink-1:#C3CCE0;
  --ink-2:#8A96B0;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 18px 40px rgba(3,8,20,.45);
  --shadow-hover:0 0 0 1px rgba(22,224,192,.35),0 12px 32px rgba(22,224,192,.18);
  --container:1240px;
  --mono:"Inter","DIN Alternate","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--ink-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
  background-image:radial-gradient(circle at 12% 0%,rgba(22,224,192,.07),transparent 42%),radial-gradient(circle at 88% 18%,rgba(255,176,32,.05),transparent 40%);
  background-repeat:no-repeat;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--ink-1);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0;color:var(--ink-0);font-weight:700;line-height:1.35;letter-spacing:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid rgba(22,224,192,.85);outline-offset:2px;border-radius:6px}
.wrap{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%}
main{display:block}
.section{padding:88px 0}
.section-alt{background:var(--bg-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--brand);border:1px solid rgba(22,224,192,.35);
  background:rgba(22,224,192,.07);
  padding:5px 12px;border-radius:999px;margin-bottom:16px;
}
.sec-head{margin-bottom:44px;max-width:760px}
.sec-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.sec-head p{color:var(--ink-2);font-size:15px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(7,11,20,.72);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{background:rgba(7,11,20,.94);box-shadow:0 14px 34px rgba(3,8,20,.55)}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:700;flex-shrink:0}
.brand:hover{color:var(--ink-0)}
.brand-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#04160F;font-family:var(--mono);font-size:14px;font-weight:700;
  box-shadow:0 0 0 1px rgba(22,224,192,.4),0 8px 20px rgba(22,224,192,.24);
}
.brand-text{font-size:17px;letter-spacing:.01em;display:inline-flex;align-items:baseline;gap:6px}
.brand-text span{font-size:13px;font-weight:500;color:var(--ink-2)}
.nav-menu{display:flex;align-items:center;gap:24px;margin-left:8px}
.nav-menu a{
  position:relative;font-size:14px;color:var(--ink-1);padding:6px 0;white-space:nowrap;
}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--brand),rgba(22,224,192,0));
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-menu a:hover{color:var(--ink-0)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.active{color:var(--brand)}
.nav-menu a.active::after{transform:scaleX(1)}
.header-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.cmd-search{
  position:relative;display:flex;align-items:center;gap:8px;
  width:260px;height:38px;padding:0 10px 0 12px;
  background:rgba(12,18,32,.75);
  border:1px solid var(--line-2);border-radius:var(--r-btn);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.cmd-search i{color:var(--ink-2);font-size:13px}
.cmd-search input{
  flex:1;min-width:0;background:transparent;border:0;color:var(--ink-0);
  font-size:13.5px;outline:none;
}
.cmd-search input::placeholder{color:var(--ink-2)}
.cmd-search:focus-within{border-color:rgba(22,224,192,.55);box-shadow:0 0 0 3px rgba(22,224,192,.14)}
.kbd{
  font-family:var(--mono);font-size:11px;color:var(--ink-2);
  border:1px solid var(--line-2);border-radius:6px;padding:1px 6px;line-height:1.6;
}
.icon-btn{
  width:38px;height:38px;border-radius:var(--r-btn);display:grid;place-items:center;
  color:var(--ink-1);border:1px solid var(--line);background:rgba(12,18,32,.6);
  transition:all .2s ease;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(22,224,192,.45);background:rgba(22,224,192,.1)}
.btn-primary-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.22);
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04160F;font-size:14px;font-weight:700;cursor:pointer;
  box-shadow:0 0 0 1px rgba(22,224,192,.25),0 10px 26px rgba(22,224,192,.22);
  transition:transform .22s ease,box-shadow .22s ease,filter .22s ease;
}
.btn-primary-glow:hover{color:#04160F;transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(22,224,192,.42),0 14px 34px rgba(22,224,192,.32)}
.btn-primary-glow:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(22,224,192,.3),0 6px 16px rgba(22,224,192,.2)}
.btn-primary-glow[disabled],.btn-primary-glow.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--r-btn);font-size:14px;font-weight:600;
  color:var(--ink-0);background:rgba(255,255,255,.03);
  border:1px solid var(--line-2);transition:all .22s ease;cursor:pointer;
}
.btn-ghost:hover{color:var(--ink-0);background:rgba(22,224,192,.1);border-color:rgba(22,224,192,.45);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.nav-burger{
  display:none;width:42px;height:42px;border-radius:var(--r-btn);
  background:rgba(12,18,32,.7);border:1px solid var(--line-2);color:var(--ink-0);
  font-size:16px;margin-left:auto;
}
.nav-drawer{
  display:none;border-top:1px solid var(--line);
  background:rgba(9,14,25,.98);padding:18px 24px 24px;
}
.nav-drawer.open{display:block}
.nav-drawer .cmd-search{width:100%;margin-bottom:16px}
.nav-drawer a.drawer-link{
  display:flex;align-items:center;height:44px;font-size:15px;
  border-bottom:1px solid var(--line);color:var(--ink-1);
}
.nav-drawer a.drawer-link.active{color:var(--brand)}
.nav-drawer .btn-primary-glow{width:100%;margin-top:18px}

/* ============ 分类头图 ============ */
.page-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background-image:linear-gradient(90deg,rgba(7,11,20,.94) 0%,rgba(7,11,20,.78) 46%,rgba(7,11,20,.55) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,192,.2),transparent 65%);pointer-events:none;
}
.page-hero .inner{position:relative;z-index:2;padding:76px 0 68px;max-width:860px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:20px}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand)}
.crumb i{font-size:10px;opacity:.6}
.page-hero h1{font-size:clamp(28px,4.4vw,46px);margin-bottom:18px}
.page-hero h1 em{font-style:normal;color:var(--brand)}
.page-hero .lead{font-size:16px;color:var(--ink-1);max-width:720px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:5px 12px;border-radius:999px;
  border:1px solid rgba(22,224,192,.35);background:rgba(22,224,192,.08);color:var(--brand);
}
.tag.amber{border-color:rgba(255,176,32,.4);background:rgba(255,176,32,.09);color:var(--accent)}

/* ============ 指标条 ============ */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
}
.metric{background:var(--glass-2);padding:24px 22px}
.metric .num{font-family:var(--mono);font-size:clamp(24px,3vw,32px);font-weight:700;color:var(--ink-0)}
.metric .num span{font-size:15px;color:var(--brand);margin-left:4px}
.metric .lb{font-size:13.5px;color:var(--ink-2);margin-top:6px}

/* ============ 时间轴 ============ */
.timeline{position:relative;padding-left:200px;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:171px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,rgba(22,224,192,0),var(--brand) 6%,var(--brand) 88%,rgba(22,224,192,0));
}
.tl-item{position:relative;margin-bottom:24px}
.tl-item:last-child{margin-bottom:0}
.tl-node{
  position:absolute;left:-200px;top:22px;width:150px;text-align:right;
  font-family:var(--mono);font-size:13px;color:var(--ink-2);letter-spacing:.04em;
}
.tl-node b{display:block;color:var(--brand);font-size:14px;font-weight:700;letter-spacing:.06em}
.tl-dot{
  position:absolute;left:-35px;top:24px;width:14px;height:14px;border-radius:50%;
  background:var(--bg-900);border:2px solid var(--brand);
  box-shadow:0 0 0 4px rgba(22,224,192,.13);
}
.tl-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 26px;box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(22,224,192,.35);box-shadow:var(--shadow-hover)}
.tl-card h3{font-size:19px;margin-bottom:10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tl-card h3 .idx{
  font-family:var(--mono);font-size:12px;color:var(--brand);
  border:1px solid rgba(22,224,192,.35);border-radius:999px;padding:2px 9px;background:rgba(22,224,192,.08);
}
.tl-card p{font-size:14.5px;color:var(--ink-1)}
.tl-list{margin-top:14px;display:grid;gap:8px}
.tl-list li{position:relative;padding-left:18px;font-size:13.8px;color:var(--ink-2)}
.tl-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--brand-deep);box-shadow:0 0 0 3px rgba(22,224,192,.1);
}

/* ============ 图文区块 ============ */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.split-figure{position:relative}
.split-figure img{aspect-ratio:16/11;object-fit:cover;width:100%;border:1px solid var(--line);box-shadow:var(--shadow)}
.split-figure .float-card{
  position:absolute;left:-18px;bottom:-22px;width:230px;
  background:var(--glass-2);border:1px solid rgba(22,224,192,.28);border-radius:var(--r-card);
  padding:16px 18px;box-shadow:0 18px 40px rgba(3,8,20,.6);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
}
.float-card .fc-num{font-family:var(--mono);font-size:22px;font-weight:700;color:var(--accent)}
.float-card .fc-tx{font-size:12.5px;color:var(--ink-2);margin-top:4px}
.set-list{display:grid;gap:14px;margin-top:24px}
.set-item{
  display:flex;gap:14px;padding:16px 18px;border-radius:14px;
  background:rgba(12,18,32,.6);border:1px solid var(--line);transition:all .22s ease;
}
.set-item:hover{border-color:rgba(22,224,192,.35);background:rgba(22,224,192,.06)}
.set-item i{color:var(--brand);font-size:16px;margin-top:5px}
.set-item strong{display:block;color:var(--ink-0);font-size:15px;margin-bottom:2px}
.set-item span{font-size:13.5px;color:var(--ink-2)}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:12px;overflow:hidden;
  transition:border-color .22s ease,background .22s ease;
}
.faq-item:has(.faq-btn[aria-expanded="true"]){border-color:rgba(22,224,192,.35);background:rgba(22,224,192,.05)}
.faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:0;text-align:left;
  color:var(--ink-0);font-size:16px;font-weight:600;cursor:pointer;
  box-shadow:none;
}
.faq-btn:hover{color:var(--brand)}
.faq-btn::after{
  content:"+";font-family:var(--mono);font-size:20px;line-height:1;color:var(--brand);
  transition:transform .24s ease;flex-shrink:0;
}
.faq-btn[aria-expanded="true"]::after{transform:rotate(45deg)}
.faq-btn:not(.collapsed){color:var(--brand)}
.faq-body{padding:0 22px 20px;font-size:14.5px;color:var(--ink-1);border-left:3px solid var(--brand);margin-left:22px;padding-left:16px}

/* ============ 相关分类 / CTA ============ */
.rel-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.rel-tags a{
  font-size:13px;padding:8px 16px;border-radius:999px;color:var(--ink-1);
  border:1px solid var(--line-2);background:rgba(255,255,255,.03);transition:all .2s ease;
}
.rel-tags a:hover{color:var(--brand);border-color:rgba(22,224,192,.45);background:rgba(22,224,192,.1);transform:translateY(-2px)}
.cta-panel{
  position:relative;overflow:hidden;border-radius:24px;padding:52px 48px;
  background:linear-gradient(120deg,rgba(18,26,44,.9),rgba(12,18,32,.75));
  border:1px solid rgba(22,224,192,.3);
  box-shadow:0 0 0 1px rgba(22,224,192,.12),0 26px 60px rgba(3,8,20,.6);
}
.cta-panel::before{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,192,.24),transparent 62%);
}
.cta-panel::after{
  content:"";position:absolute;right:34px;bottom:-40px;width:180px;height:180px;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:20px 20px;mask-image:radial-gradient(circle,#000,transparent 70%);
  -webkit-mask-image:radial-gradient(circle,#000,transparent 70%);opacity:.7;
}
.cta-panel .inner{position:relative;z-index:2;max-width:640px}
.cta-panel h2{font-size:clamp(22px,2.8vw,30px);margin-bottom:12px}
.cta-panel p{color:var(--ink-2);font-size:14.5px;margin-bottom:26px}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--bg-800);padding-top:64px;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:44px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:13.5px;color:var(--ink-2);max-width:340px}
.footer-col h4{font-size:14px;color:var(--ink-0);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:10px}
.footer-col ul a{font-size:13.5px;color:var(--ink-2)}
.footer-col ul a:hover{color:var(--brand)}
.footer-contact li{display:flex;gap:10px;font-size:13.5px;color:var(--ink-2)}
.footer-contact i{color:var(--brand);margin-top:6px;font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);padding:20px 0 28px;font-size:13px;color:var(--ink-2);
}
.footer-bottom a{color:var(--ink-2)}
.footer-bottom a:hover{color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .cmd-search{width:200px}
  .nav-menu{gap:18px}
}
@media (max-width:991.98px){
  .nav-menu,.header-right{display:none}
  .nav-burger{display:grid;place-items:center}
  .split{grid-template-columns:1fr;gap:36px}
  .split-figure .float-card{left:auto;right:14px;bottom:-18px;width:210px}
  .metric-strip{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
}
@media (max-width:767.98px){
  .wrap{padding:0 18px}
  .page-hero .inner{padding:56px 0 52px}
  .timeline{padding-left:34px}
  .timeline::before{left:6px}
  .tl-node{position:static;width:auto;text-align:left;margin-bottom:10px}
  .tl-dot{left:-34px;top:10px}
  .tl-card{padding:20px}
  .cta-panel{padding:36px 24px}
  .faq-body{margin-left:14px;padding-left:14px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}
@media (max-width:575.98px){
  .metric-strip{grid-template-columns:1fr}
  .brand-text span{display:none}
  .page-hero h1{font-size:26px}
  .tl-card h3{font-size:17px}
}

/* roulang page: category3 */
:root{
  --bg-900:#070B14;
  --bg-800:#0C1220;
  --bg-700:#101A2E;
  --glass:rgba(18,26,44,.55);
  --glass-strong:rgba(18,26,44,.78);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --brand:#16E0C0;
  --brand-deep:#0FB79C;
  --accent:#FFB020;
  --ok:#2BD97C;
  --warn:#FF6B57;
  --ink-0:#F2F6FF;
  --ink-1:#C3CCE0;
  --ink-2:#8A96B0;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --sh-card:0 18px 40px rgba(3,8,20,.45);
  --sh-glow:0 12px 32px rgba(22,224,192,.18);
  --wrap:1240px;
  --t:200ms cubic-bezier(.2,.7,.3,1);
  --mono:"Inter","SFMono-Regular",ui-monospace,"DIN Alternate",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-1);
  background:var(--bg-900);
  background-image:
    radial-gradient(900px 520px at 12% -8%, rgba(22,224,192,.10), transparent 62%),
    radial-gradient(760px 460px at 92% 4%, rgba(255,176,32,.06), transparent 60%);
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--brand);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--ink-0)}
h1,h2,h3,h4{margin:0;color:var(--ink-0);line-height:1.28;letter-spacing:.01em}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:none;box-shadow:0 0 0 2px rgba(22,224,192,.65),0 0 0 6px rgba(22,224,192,.14);border-radius:8px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#05130f;padding:10px 16px;border-radius:0 0 12px 0;z-index:2000}
.skip-link:focus{left:0}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  height:68px;
  background:rgba(7,11,20,.62);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid var(--line);
  transition:background var(--t),box-shadow var(--t);
}
.site-header.scrolled{background:rgba(6,9,17,.9);box-shadow:0 14px 34px rgba(3,8,20,.55)}
.header-inner{height:68px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#04140f;font-family:var(--mono);font-weight:800;font-size:14px;letter-spacing:.02em;
  box-shadow:0 0 0 1px rgba(22,224,192,.5),0 8px 22px rgba(22,224,192,.26);
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink-0);line-height:1.12}
.brand-text span{display:block;font-size:10.5px;font-weight:500;color:var(--ink-2);letter-spacing:.08em}
.nav-menu{display:flex;align-items:center;gap:4px;flex:1 1 auto;min-width:0}
.nav-menu a{
  position:relative;
  padding:9px 12px;font-size:14px;color:var(--ink-2);border-radius:10px;
  white-space:nowrap;transition:color var(--t),background var(--t);
}
.nav-menu a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-deep));
  transform:scaleX(0);transform-origin:left;transition:transform 240ms cubic-bezier(.2,.7,.3,1);
}
.nav-menu a:hover{color:var(--ink-0);background:rgba(255,255,255,.04)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.active{color:var(--ink-0);font-weight:600}
.nav-menu a.active::after{transform:scaleX(1)}
.header-right{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.command-search{
  display:flex;align-items:center;gap:8px;width:260px;height:40px;padding:0 10px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.command-search:focus-within{border-color:rgba(22,224,192,.55);background:rgba(22,224,192,.06);box-shadow:0 0 0 3px rgba(22,224,192,.14)}
.command-search i{color:var(--ink-2);font-size:13px}
.command-search input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;color:var(--ink-0);font-size:13.5px;outline:none;
}
.command-search input::placeholder{color:var(--ink-2)}
.kbd{
  flex:0 0 auto;font-family:var(--mono);font-size:11px;color:var(--ink-2);
  border:1px solid var(--line);border-radius:7px;padding:2px 6px;line-height:1.4;
}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-btn);display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--ink-2);
  transition:color var(--t),border-color var(--t),background var(--t),transform var(--t);
}
.icon-btn:hover{color:var(--brand);border-color:rgba(22,224,192,.45);background:rgba(22,224,192,.08);transform:translateY(-1px)}
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border:1px solid rgba(22,224,192,.55);border-radius:var(--r-btn);
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04140f;font-size:14.5px;font-weight:700;letter-spacing:.02em;
  box-shadow:0 0 0 1px rgba(22,224,192,.28),0 10px 26px rgba(22,224,192,.3);
  transition:filter var(--t),transform var(--t),box-shadow var(--t);
}
.btn-glow:hover{filter:brightness(1.07);transform:translateY(-2px);color:#04140f;box-shadow:0 0 0 1px rgba(22,224,192,.45),0 16px 36px rgba(22,224,192,.4)}
.btn-glow:active{transform:translateY(-1px)}
.btn-glow[disabled],.btn-glow.is-disabled{opacity:.45;filter:none;box-shadow:none;pointer-events:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border:1px solid var(--line-strong);border-radius:var(--r-btn);
  background:rgba(255,255,255,.03);color:var(--ink-1);font-size:14.5px;font-weight:600;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);
}
.btn-ghost:hover{background:rgba(22,224,192,.10);color:var(--ink-0);border-color:rgba(22,224,192,.42);transform:translateY(-2px)}
.burger{
  display:none;width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--line);
  background:rgba(255,255,255,.03);color:var(--ink-0);align-items:center;justify-content:center;
}
.burger i{font-size:15px}
.mobile-drawer{
  position:fixed;top:68px;right:0;bottom:0;width:min(340px,86vw);z-index:1050;
  background:rgba(8,12,22,.97);backdrop-filter:blur(20px);border-left:1px solid var(--line);
  padding:20px 18px 28px;display:flex;flex-direction:column;gap:8px;
  transform:translateX(105%);transition:transform 260ms cubic-bezier(.2,.7,.3,1);overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer .command-search{width:100%;margin-bottom:6px}
.mobile-drawer a.drawer-link{
  display:flex;align-items:center;min-height:44px;padding:0 14px;border-radius:12px;
  color:var(--ink-1);font-size:15px;border:1px solid transparent;
}
.mobile-drawer a.drawer-link:hover{background:rgba(255,255,255,.05);color:var(--ink-0)}
.mobile-drawer a.drawer-link.active{background:rgba(22,224,192,.12);border-color:rgba(22,224,192,.36);color:var(--ink-0);font-weight:600}
.drawer-cta{margin-top:auto;padding-top:16px}
.drawer-cta .btn-glow{width:100%}
.drawer-mask{position:fixed;inset:68px 0 0 0;background:rgba(3,6,14,.6);opacity:0;pointer-events:none;transition:opacity var(--t);z-index:1045}
.drawer-mask.open{opacity:1;pointer-events:auto}

/* ---------- Common blocks ---------- */
main{display:block}
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-alt{background:rgba(12,18,32,.55);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),transparent)}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700}
h3{font-size:21px;font-weight:600}
.section-head p{margin-top:14px;color:var(--ink-1);font-size:15.5px}
.muted{color:var(--ink-2)}
.card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--sh-card);transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-4px);border-color:rgba(22,224,192,.35);box-shadow:var(--sh-card),0 0 0 1px rgba(22,224,192,.35),var(--sh-glow)}
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  padding:4px 12px;border-radius:999px;border:1px solid rgba(22,224,192,.4);
  background:rgba(22,224,192,.10);color:var(--brand);letter-spacing:.03em;
}
.badge-pill.amber{border-color:rgba(255,176,32,.42);background:rgba(255,176,32,.12);color:var(--accent)}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;padding:72px 0 76px;overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center 22%;
  opacity:.3;filter:saturate(115%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.72),rgba(7,11,20,.94) 68%,var(--bg-900));
}
.page-hero .wrap{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2);margin-bottom:20px;flex-wrap:wrap}
.crumbs a{color:var(--ink-2)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:rgba(255,255,255,.22)}
.page-hero h1{font-size:clamp(28px,4vw,48px);font-weight:700;max-width:960px}
.page-hero h1 em{font-style:normal;color:var(--brand);text-shadow:0 0 32px rgba(22,224,192,.35)}
.hero-sub{margin-top:18px;max-width:720px;font-size:16.5px;color:var(--ink-1)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-meta{display:flex;flex-wrap:wrap;gap:34px;margin-top:38px}
.hero-meta li{display:flex;flex-direction:column;gap:2px;padding-left:16px;border-left:2px solid rgba(22,224,192,.4)}
.hero-meta strong{font-family:var(--mono);font-size:28px;font-weight:700;color:var(--ink-0);line-height:1.1}
.hero-meta span{font-size:13px;color:var(--ink-2)}

/* ---------- Overview cards ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:34px;align-items:center}
.ico-box{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(22,224,192,.12);border:1px solid rgba(22,224,192,.32);color:var(--brand);font-size:17px;
}
.ico-box.amber{background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.34);color:var(--accent)}
.card h3{font-size:18px;margin-bottom:10px}
.card p{margin:0;font-size:14.5px;color:var(--ink-1);line-height:1.75}

/* ---------- Compare table ---------- */
.table-shell{
  border:1px solid var(--line);border-radius:20px;overflow:hidden;
  background:rgba(12,18,32,.6);backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);box-shadow:var(--sh-card);
}
.cmp-table{width:100%;border-collapse:collapse;font-size:14.5px}
.cmp-table caption{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.cmp-table thead th{
  padding:16px 18px;text-align:left;font-size:14px;font-weight:700;color:var(--ink-0);
  background:linear-gradient(180deg,rgba(8,12,22,.98),rgba(13,20,36,.94));
  border-bottom:1px solid rgba(22,224,192,.3);white-space:nowrap;
}
.cmp-table thead th:first-child{color:var(--brand)}
.cmp-table tbody th[scope="row"]{
  padding:17px 18px;text-align:left;vertical-align:top;font-size:14.5px;font-weight:600;color:var(--ink-0);
  background:rgba(22,224,192,.07);
  box-shadow:inset 3px 0 0 var(--brand);
  border-top:1px solid rgba(255,255,255,.07);
}
.cmp-table tbody td{
  padding:17px 18px;color:var(--ink-1);line-height:1.7;vertical-align:top;
  border-top:1px solid rgba(255,255,255,.07);
}
.cmp-table tbody tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.cmp-table tbody tr:nth-child(even) th[scope="row"]{background:rgba(22,224,192,.10)}
.cmp-table tbody tr:hover td{background:rgba(22,224,192,.05)}
.cmp-table .cell-strong{color:var(--ink-0);font-weight:600}
.table-note{margin-top:18px;font-size:13.5px;color:var(--ink-2);display:flex;gap:10px;align-items:flex-start}
.table-note i{color:var(--accent);margin-top:4px}

/* ---------- Media block ---------- */
.media-figure{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-card)}
.media-figure img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:0}
.media-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,20,0) 45%,rgba(7,11,20,.55))}
.check-list li{display:flex;gap:12px;align-items:flex-start;padding:13px 0;border-bottom:1px dashed rgba(255,255,255,.09);font-size:15px}
.check-list li:last-child{border-bottom:0}
.check-list i{color:var(--brand);margin-top:5px;font-size:14px}
.check-list strong{color:var(--ink-0);font-weight:600}

/* ---------- Tips panel ---------- */
.tip-panel{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);box-shadow:var(--sh-card);
}
.tip-panel h3{display:flex;align-items:center;gap:10px;font-size:18px;margin-bottom:14px}
.tip-panel h3 i{color:var(--brand)}
.tip-panel ul li{position:relative;padding-left:20px;font-size:14.5px;color:var(--ink-1);margin-bottom:10px}
.tip-panel ul li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 10px rgba(22,224,192,.6);
}
.tip-panel.amber h3 i{color:var(--accent)}
.tip-panel.amber ul li::before{background:var(--accent);box-shadow:0 0 10px rgba(255,176,32,.6)}
.tips-stack{display:grid;gap:20px}

/* ---------- FAQ ---------- */
.faq-acc .accordion-item{
  background:var(--glass);border:1px solid var(--line);border-radius:14px !important;
  margin-bottom:14px;overflow:hidden;
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  transition:border-color var(--t),box-shadow var(--t);
}
.faq-acc .accordion-item:hover{border-color:rgba(22,224,192,.3)}
.faq-acc .accordion-button{
  background:transparent;border:0;box-shadow:none;color:var(--ink-0);
  font-size:16.5px;font-weight:600;padding:20px 24px;line-height:1.6;
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--brand);background:rgba(22,224,192,.06);
  box-shadow:inset 3px 0 0 var(--brand);border-radius:0 !important;
}
.faq-acc .accordion-button:focus{box-shadow:0 0 0 2px rgba(22,224,192,.45)}
.faq-acc .accordion-button::after{
  content:"+";background-image:none;width:auto;height:auto;
  font-family:var(--mono);font-size:20px;font-weight:400;color:var(--brand);
  display:flex;align-items:center;justify-content:center;transform:rotate(0deg);
  transition:transform var(--t);
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(45deg);background-image:none}
.faq-acc .accordion-body{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--ink-1)}

/* ---------- Related + CTA ---------- */
.pill-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.pill{
  display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  font-size:13.5px;color:var(--ink-1);transition:all var(--t);
}
.pill:hover{background:rgba(22,224,192,.12);border-color:rgba(22,224,192,.45);color:var(--ink-0);transform:translateY(-2px)}
.pill i{font-size:12px;color:var(--brand)}
.cta-panel{
  position:relative;overflow:hidden;border-radius:22px;padding:52px 44px;
  border:1px solid rgba(22,224,192,.32);
  background:linear-gradient(140deg,rgba(18,26,44,.9),rgba(9,14,26,.86));
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:0 0 0 1px rgba(22,224,192,.14),0 22px 60px rgba(3,8,20,.6);
}
.cta-panel::before{
  content:"";position:absolute;top:-120px;right:-90px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,192,.28),transparent 68%);
}
.cta-panel::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(560px 300px at 82% 10%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(560px 300px at 82% 10%,#000,transparent 72%);
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between}
.cta-inner h2{font-size:clamp(22px,2.4vw,30px)}
.cta-inner p{margin:12px 0 0;max-width:620px;font-size:15px;color:var(--ink-1)}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:20px;padding:64px 0 26px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(9,13,24,.6),rgba(5,8,15,.95));
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand p{margin-top:18px;font-size:13.5px;line-height:1.85;color:var(--ink-2);max-width:330px}
.footer-col h4{font-size:14.5px;font-weight:700;color:var(--ink-0);margin-bottom:16px}
.footer-col ul li{margin-bottom:11px}
.footer-col ul a{font-size:13.5px;color:var(--ink-2)}
.footer-col ul a:hover{color:var(--brand)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--ink-2);margin-bottom:12px}
.footer-contact i{color:var(--brand);margin-top:4px;font-size:13px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--ink-2);
}
.footer-bottom a{color:var(--ink-2)}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- Responsive ---------- */
@media (max-width:1400px){
  .command-search{width:230px}
}
@media (max-width:1200px){
  .nav-menu a{padding:9px 9px;font-size:13.5px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991.98px){
  .nav-menu,.header-right .command-search,.header-right .icon-btn{display:none}
  .burger{display:flex}
  .section{padding:64px 0}
  .page-hero{padding:56px 0 60px}
  .grid-2{grid-template-columns:1fr;gap:26px}
  .media-figure{order:-1}
  .grid-3{grid-template-columns:1fr 1fr}
  .cta-panel{padding:40px 26px}
}
@media (max-width:767.98px){
  .wrap{padding:0 18px}
  .grid-3,.grid-4{grid-template-columns:1fr}
  .hero-meta{gap:20px}
  .hero-meta strong{font-size:23px}
  .hero-actions .btn-glow,.hero-actions .btn-ghost{flex:1 1 100%}
  .table-shell{border:0;background:transparent;box-shadow:none;overflow:visible}
  .cmp-table,.cmp-table tbody,.cmp-table tr,.cmp-table th,.cmp-table td{display:block;width:100%}
  .cmp-table thead{display:none}
  .cmp-table tbody tr{
    background:var(--glass);border:1px solid var(--line);border-radius:16px;
    padding:16px 16px 10px;margin-bottom:14px;
    backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  }
  .cmp-table tbody th[scope="row"]{
    background:transparent;box-shadow:none;padding:0 0 10px;margin-bottom:6px;
    font-size:16px;color:var(--ink-0);border-top:0;border-bottom:1px solid rgba(22,224,192,.28);
  }
  .cmp-table tbody td{
    border-top:0;padding:8px 0;display:flex;gap:14px;justify-content:space-between;
    align-items:flex-start;text-align:right;
  }
  .cmp-table tbody td::before{
    content:attr(data-label);flex:0 0 96px;text-align:left;
    font-size:12.5px;color:var(--ink-2);line-height:1.7;
  }
  .faq-acc .accordion-button{font-size:15.5px;padding:17px 18px}
  .faq-acc .accordion-body{padding:0 18px 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .card{padding:20px}
  .page-hero h1{font-size:26px}
  .brand-text{font-size:15.5px}
  .brand-text span{font-size:9.5px}
  .tip-panel{padding:20px}
  .cta-panel{padding:32px 20px}
}

/* roulang page: category4 */
:root{
  --bg-900:#070B14;
  --bg-800:#0C1220;
  --bg-700:#111A2E;
  --brand:#16E0C0;
  --brand-deep:#0FB79C;
  --accent:#FFB020;
  --ok:#2BD97C;
  --warn:#FF6B57;
  --ink-0:#F2F6FF;
  --ink-1:#C3CCE0;
  --ink-2:#8A96B0;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --glass:rgba(18,26,44,.55);
  --glass-2:rgba(18,26,44,.78);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 18px 40px rgba(3,8,20,.45);
  --glow-hover:0 0 0 1px rgba(22,224,192,.35),0 12px 32px rgba(22,224,192,.18);
  --wrap:1240px;
  --ease:200ms cubic-bezier(.4,.2,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1100px 620px at 12% -8%,rgba(22,224,192,.10),transparent 60%),
    radial-gradient(900px 520px at 92% 4%,rgba(255,176,32,.07),transparent 62%),
    var(--bg-900);
  color:var(--ink-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Inter",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{color:var(--ink-0);margin:0;font-weight:700;letter-spacing:0;line-height:1.32;}
p{margin:0;}
a{color:var(--brand);text-decoration:none;transition:color var(--ease),opacity var(--ease);}
a:hover{color:#5CF0DA;}
img{max-width:100%;display:block;}
button{font-family:inherit;}
ul{list-style:none;margin:0;padding:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px;}
.mono{font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;font-variant-numeric:tabular-nums;}

/* ============ HEADER ============ */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(7,11,20,.62);
  backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid var(--line);
  transition:background var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{
  background:rgba(7,11,20,.92);
  box-shadow:0 14px 34px rgba(2,6,16,.55);
}
.header-inner{
  min-height:68px;display:flex;align-items:center;gap:22px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-0);}
.brand:hover{color:var(--ink-0);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 60%,#0A8C7A 100%);
  color:#04211D;font-weight:800;font-size:15px;letter-spacing:.5px;
  box-shadow:0 8px 22px rgba(22,224,192,.28),inset 0 0 0 1px rgba(255,255,255,.25);
}
.brand-text{font-size:17px;font-weight:700;line-height:1.2;white-space:nowrap;}
.brand-text span{display:block;font-size:11px;font-weight:500;color:var(--ink-2);letter-spacing:.6px;}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:6px;}
.nav-menu a{
  position:relative;display:inline-block;padding:9px 12px;
  font-size:14px;color:var(--ink-1);border-radius:10px;white-space:nowrap;
  transition:color var(--ease),background var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-deep));
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);border-radius:2px;
}
.nav-menu a:hover{color:var(--ink-0);background:rgba(255,255,255,.04);}
.nav-menu a:hover::after,.nav-menu a.active::after{transform:scaleX(1);}
.nav-menu a.active{color:var(--ink-0);background:rgba(22,224,192,.10);}
.header-right{margin-left:auto;display:flex;align-items:center;gap:10px;}
.cmd-search{
  display:flex;align-items:center;gap:8px;width:260px;height:40px;padding:0 10px 0 12px;
  background:rgba(12,18,32,.85);border:1px solid var(--line);border-radius:12px;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.cmd-search i{color:var(--ink-2);font-size:13px;}
.cmd-search input{
  flex:1;min-width:0;background:transparent;border:0;outline:0;color:var(--ink-0);font-size:13.5px;
}
.cmd-search input::placeholder{color:var(--ink-2);}
.cmd-search kbd{
  font-family:inherit;font-size:11px;color:var(--ink-2);padding:2px 7px;
  border:1px solid var(--line-strong);border-radius:6px;background:rgba(255,255,255,.03);
}
.cmd-search:focus-within{
  border-color:rgba(22,224,192,.55);box-shadow:0 0 0 3px rgba(22,224,192,.14);
  background:rgba(12,18,32,1);
}
.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;border-radius:11px;
  border:1px solid var(--line);color:var(--ink-1);background:rgba(255,255,255,.02);
  transition:all var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:rgba(22,224,192,.45);background:rgba(22,224,192,.08);transform:translateY(-1px);}
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.22);
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#04211D;font-size:14px;font-weight:700;white-space:nowrap;
  box-shadow:0 10px 26px rgba(22,224,192,.30);
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease);
}
.btn-glow:hover{
  color:#04211D;filter:brightness(1.06);transform:translateY(-2px);
  box-shadow:0 14px 34px rgba(22,224,192,.42),0 0 0 1px rgba(22,224,192,.5);
}
.btn-glow:active{transform:translateY(1px);}
.btn-glass{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:var(--r-btn);
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  color:var(--ink-1);font-size:14px;font-weight:600;
  transition:all var(--ease);
}
.btn-glass:hover{color:var(--ink-0);background:rgba(22,224,192,.10);border-color:rgba(22,224,192,.45);transform:translateY(-2px);}
.btn-glass:active{transform:translateY(0);}
.burger{
  display:none;width:40px;height:40px;border-radius:11px;border:1px solid var(--line);
  background:rgba(255,255,255,.03);color:var(--ink-0);font-size:16px;
}
/* drawer */
.drawer{
  position:fixed;top:0;right:0;height:100vh;width:min(340px,88vw);z-index:1060;
  background:rgba(9,14,26,.98);backdrop-filter:blur(20px);
  border-left:1px solid var(--line);
  transform:translateX(103%);transition:transform 260ms cubic-bezier(.4,.2,.2,1);
  display:flex;flex-direction:column;padding:20px 18px;overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,6,14,.66);z-index:1050;opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--ink-1);}
.drawer .cmd-search{width:100%;margin-bottom:16px;}
.drawer-links a{
  display:flex;align-items:center;min-height:44px;padding:0 12px;border-radius:10px;
  color:var(--ink-1);font-size:15px;border:1px solid transparent;
}
.drawer-links a:hover{background:rgba(22,224,192,.08);color:var(--ink-0);}
.drawer-links a.active{background:rgba(22,224,192,.12);color:var(--ink-0);border-color:rgba(22,224,192,.28);}
.drawer-cta{margin-top:auto;padding-top:18px;}
.drawer-cta .btn-glow{width:100%;}

/* ============ BANNER ============ */
.page-banner{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background-image:linear-gradient(100deg,rgba(5,9,18,.94) 0%,rgba(5,9,18,.80) 45%,rgba(5,9,18,.55) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(700px 320px at 82% 12%,rgba(22,224,192,.20),transparent 66%);
  pointer-events:none;
}
.banner-inner{position:relative;z-index:2;padding:74px 0 66px;max-width:820px;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:20px;}
.crumbs a{color:var(--ink-2);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{opacity:.5;}
.banner-inner h1{font-size:clamp(28px,4.2vw,46px);line-height:1.25;margin-bottom:18px;}
.banner-inner h1 em{font-style:normal;color:var(--brand);}
.banner-lead{font-size:16.5px;color:var(--ink-1);max-width:660px;}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;
  font-size:12.5px;color:var(--ink-1);background:rgba(22,224,192,.08);
  border:1px solid rgba(22,224,192,.28);
}
.tag i{color:var(--brand);font-size:11px;}
.tag.warn{background:rgba(255,176,32,.09);border-color:rgba(255,176,32,.30);}
.tag.warn i{color:var(--accent);}

/* ============ SECTION ============ */
section{padding:86px 0;}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:1.4px;
  color:var(--brand);text-transform:uppercase;margin-bottom:14px;font-weight:600;
}
.section-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px;}
.section-head p{color:var(--ink-2);font-size:15.5px;}
.alt{background:linear-gradient(180deg,rgba(12,18,32,0) 0%,rgba(12,18,32,.72) 18%,rgba(12,18,32,.72) 82%,rgba(12,18,32,0) 100%);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* symptom strip */
.symptom-grid{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;
}
.symptom{
  background:var(--glass);backdrop-filter:blur(18px) saturate(140%);
  border:1px solid var(--line);border-radius:var(--r-card);padding:20px 18px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.symptom:hover{transform:translateY(-4px);border-color:rgba(22,224,192,.35);box-shadow:var(--glow-hover);}
.symptom i{font-size:17px;color:var(--brand);margin-bottom:12px;display:block;}
.symptom h3{font-size:15px;margin-bottom:6px;}
.symptom p{font-size:13px;color:var(--ink-2);line-height:1.7;}

/* step list */
.step-list{display:grid;gap:18px;}
.step{
  display:grid;grid-template-columns:104px minmax(0,1fr);gap:22px;align-items:start;
}
.step-index{
  font-family:"SFMono-Regular",Consolas,Menlo,monospace;
  font-size:44px;font-weight:700;line-height:1;color:transparent;
  -webkit-text-stroke:1.4px rgba(22,224,192,.65);
  padding-top:10px;
}
.step-card{
  background:var(--glass);backdrop-filter:blur(18px) saturate(140%);
  border:1px solid var(--line);border-radius:var(--r-card);padding:26px 28px;
  position:relative;overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--brand),rgba(22,224,192,0));
  opacity:.75;
}
.step-card:hover{transform:translateY(-3px);border-color:rgba(22,224,192,.34);box-shadow:var(--glow-hover);}
.step-card h3{font-size:19px;margin-bottom:10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.step-card h3 .chip{
  font-size:11.5px;font-weight:600;color:var(--accent);padding:3px 9px;border-radius:999px;
  border:1px solid rgba(255,176,32,.32);background:rgba(255,176,32,.10);letter-spacing:.3px;
}
.step-card p{color:var(--ink-1);font-size:15px;}
.check-list{margin-top:14px;display:grid;gap:9px;}
.check-list li{
  position:relative;padding-left:24px;font-size:14px;color:var(--ink-2);line-height:1.75;
}
.check-list li::before{
  content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:2px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:0 0 0 3px rgba(22,224,192,.12);
}
.step-meta{
  margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--ink-2);display:flex;gap:8px;align-items:flex-start;
}
.step-meta i{color:var(--accent);margin-top:5px;}

/* evidence block */
.evidence{
  display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center;
}
.figure{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);position:relative;
}
.figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,0) 45%,rgba(7,11,20,.72) 100%);
  pointer-events:none;
}
.figure-cap{
  position:absolute;left:18px;bottom:14px;z-index:2;font-size:13px;color:var(--ink-1);
  display:flex;align-items:center;gap:8px;
}
.figure-cap i{color:var(--brand);}
.info-list{display:grid;gap:14px;margin-top:22px;}
.info-item{
  display:flex;gap:14px;padding:16px 18px;border-radius:14px;
  background:rgba(255,255,255,.03);border:1px solid var(--line);
  transition:border-color var(--ease),background var(--ease),transform var(--ease);
}
.info-item:hover{border-color:rgba(22,224,192,.35);background:rgba(22,224,192,.06);transform:translateX(3px);}
.info-item i{color:var(--brand);font-size:15px;margin-top:5px;}
.info-item h4{font-size:15px;margin-bottom:4px;}
.info-item p{font-size:13.5px;color:var(--ink-2);}

/* faq */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion-item{
  background:var(--glass);border:1px solid var(--line)!important;border-radius:14px!important;
  margin-bottom:12px;overflow:hidden;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.accordion-item:hover{border-color:rgba(22,224,192,.30)!important;}
.accordion-button{
  background:transparent!important;color:var(--ink-0)!important;font-size:16px;font-weight:600;
  padding:18px 52px 18px 20px;box-shadow:none!important;border-radius:14px!important;
  line-height:1.6;
}
.accordion-button::after{
  background-image:none!important;content:"+";font-size:20px;font-weight:400;
  color:var(--brand);display:grid;place-items:center;width:26px;height:26px;
  transition:transform var(--ease);position:absolute;right:18px;top:50%;margin-top:-13px;line-height:1;
}
.accordion-button:not(.collapsed){color:var(--ink-0)!important;background:rgba(22,224,192,.06)!important;}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--brand),var(--brand-deep));
}
.accordion-body{
  padding:0 24px 22px 20px;color:var(--ink-1);font-size:15px;line-height:1.85;
}
.accordion-body strong{color:var(--ink-0);}

/* cta */
.cta-panel{
  position:relative;overflow:hidden;border-radius:24px;
  background:
    radial-gradient(680px 300px at 88% -10%,rgba(22,224,192,.20),transparent 62%),
    linear-gradient(140deg,rgba(18,26,44,.92) 0%,rgba(9,14,26,.96) 100%);
  border:1px solid rgba(22,224,192,.28);
  box-shadow:0 26px 60px rgba(3,8,20,.55),inset 0 0 0 1px rgba(255,255,255,.04);
  padding:52px 48px;
}
.cta-panel::before{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;
  background-image:linear-gradient(rgba(22,224,192,.18) 1px,transparent 1px),linear-gradient(90deg,rgba(22,224,192,.18) 1px,transparent 1px);
  background-size:26px 26px;opacity:.45;pointer-events:none;
}
.cta-panel h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;}
.cta-panel p{color:var(--ink-1);max-width:640px;font-size:15.5px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.cta-stats{display:flex;flex-wrap:wrap;gap:34px;margin-top:34px;padding-top:26px;border-top:1px solid var(--line);}
.cta-stat .num{
  font-family:"SFMono-Regular",Consolas,Menlo,monospace;font-size:28px;font-weight:700;
  color:var(--brand);line-height:1.1;
}
.cta-stat .lbl{font-size:13px;color:var(--ink-2);margin-top:4px;}

/* related pills */
.related{padding:64px 0 78px;}
.related h2{font-size:20px;margin-bottom:20px;}
.pill-row{display:flex;flex-wrap:wrap;gap:12px;}
.pill{
  display:inline-flex;align-items:center;gap:9px;padding:10px 18px;border-radius:999px;
  font-size:14px;color:var(--ink-1);border:1px solid var(--line-strong);
  background:rgba(255,255,255,.03);transition:all var(--ease);
}
.pill i{font-size:12px;color:var(--brand);}
.pill:hover{color:var(--ink-0);border-color:rgba(22,224,192,.5);background:rgba(22,224,192,.10);transform:translateY(-2px);box-shadow:0 10px 24px rgba(22,224,192,.16);}

/* ============ FOOTER ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(12,18,32,.6) 0%,rgba(7,11,20,.98) 100%);
  padding:60px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.25fr;gap:38px;
  padding-bottom:44px;border-bottom:1px solid var(--line);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:13.5px;color:var(--ink-2);max-width:320px;line-height:1.85;}
.footer-col h4{font-size:14px;margin-bottom:16px;color:var(--ink-0);letter-spacing:.4px;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{font-size:13.5px;color:var(--ink-2);}
.footer-col a:hover{color:var(--brand);}
.footer-contact li{display:flex;gap:10px;font-size:13.5px;color:var(--ink-2);line-height:1.75;}
.footer-contact i{color:var(--brand);margin-top:6px;font-size:12px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:20px 0 26px;font-size:13px;color:var(--ink-2);
}
.footer-bottom a{color:var(--ink-1);}
.footer-bottom a:hover{color:var(--brand);}

/* ============ RESPONSIVE ============ */
@media (max-width:1199.98px){
  .cmd-search{width:200px;}
  .nav-menu a{padding:9px 9px;font-size:13.5px;}
  .symptom-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:991.98px){
  .nav-menu,.header-right .cmd-search,.header-right .icon-btn{display:none;}
  .burger{display:grid;place-items:center;}
  .banner-inner{padding:56px 0 50px;}
  section{padding:62px 0;}
  .step{grid-template-columns:70px minmax(0,1fr);gap:14px;}
  .step-index{font-size:32px;-webkit-text-stroke:1.1px rgba(22,224,192,.65);padding-top:8px;}
  .evidence{grid-template-columns:1fr;gap:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .cta-panel{padding:38px 26px;}
  .symptom-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:768px){
  .wrap{padding:0 18px;}
  .brand-text{font-size:15.5px;}
  .banner-inner h1{font-size:26px;}
  .step{grid-template-columns:1fr;gap:8px;}
  .step-index{padding-top:0;font-size:26px;}
  .step-card{padding:22px 20px;}
  .cta-stats{gap:24px;}
}
@media (max-width:575.98px){
  .symptom-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-actions .btn-glow,.cta-actions .btn-glass{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}